/*
This file is part of GNUnet.
- (C) 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2011-2014 GNUnet e.V.
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Affero General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @author Fabian Oehlmann
* @author Matthias Wachs
*/
-#include "plugin_ats_ril.h"
-
-#define LOG(kind,...) GNUNET_log_from (kind, "ats-ril",__VA_ARGS__)
+#include "platform.h"
+#include <float.h>
+#include <math.h>
+#include "gnunet_ats_plugin.h"
+#include "gnunet-service-ats_addresses.h"
-#define MIN_BW ntohl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__)
-#define RIL_ACTION_INVALID -1
-#define RIL_FEATURES_ADDRESS_COUNT (0)// + GNUNET_ATS_QualityPropertiesCount)
-#define RIL_FEATURES_NETWORK_COUNT 2
-#define RIL_FEATURES_INIT_COUNT 1 + RIL_FEATURES_NETWORK_COUNT // + GNUNET_ATS_PreferenceCount
-#define RIL_INTERVAL_EXPONENT 10
-#define RIL_UTILITY_MAX (double) GNUNET_ATS_MaxBandwidth
-#define RIL_DEFAULT_STEP_TIME_MIN GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
-#define RIL_DEFAULT_STEP_TIME_MAX GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 3000)
-#define RIL_DEFAULT_ALGORITHM RIL_ALGO_SARSA
-#define RIL_DEFAULT_DISCOUNT_BETA 1
-#define RIL_DEFAULT_DISCOUNT_GAMMA 0.5
-#define RIL_DEFAULT_GRADIENT_STEP_SIZE 0.1
-#define RIL_DEFAULT_TRACE_DECAY 0.5
-#define RIL_DEFAULT_EXPLORE_RATIO 0.1
-#define RIL_DEFAULT_GLOBAL_REWARD_SHARE 0.5
+#define LOG(kind,...) GNUNET_log_from (kind, "ats-ril",__VA_ARGS__)
-#define RIL_INC_DEC_STEP_SIZE 1
+#define RIL_MIN_BW (5 * ntohl (GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT.value__))
+#define RIL_MAX_BW GNUNET_ATS_MaxBandwidth
+
+#define RIL_ACTION_INVALID -1
+#define RIL_INTERVAL_EXPONENT 10
+#define RIL_UTILITY_DELAY_MAX 1000
+
+#define RIL_DEFAULT_STEP_TIME_MIN GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 200)
+#define RIL_DEFAULT_STEP_TIME_MAX GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 2000)
+#define RIL_DEFAULT_ALGORITHM RIL_ALGO_SARSA
+#define RIL_DEFAULT_SELECT RIL_SELECT_SOFTMAX
+#define RIL_DEFAULT_WELFARE RIL_WELFARE_NASH
+#define RIL_DEFAULT_DISCOUNT_BETA 0.6
+#define RIL_DEFAULT_DISCOUNT_GAMMA 0.5
+#define RIL_DEFAULT_GRADIENT_STEP_SIZE 0.01
+#define RIL_DEFAULT_TRACE_DECAY 0.5
+#define RIL_DEFAULT_EXPLORE_RATIO 1
+#define RIL_DEFAULT_EXPLORE_DECAY 0.95
+#define RIL_DEFAULT_RBF_DIVISOR 50
+#define RIL_DEFAULT_TEMPERATURE 0.1
+#define RIL_DEFAULT_TEMPERATURE_DECAY 1
+
+#define RIL_INC_DEC_STEP_SIZE 1
+#define RIL_NOP_DECAY 0.5
/**
* ATS reinforcement learning solver
*/
enum RIL_Action_Type
{
- RIL_ACTION_NOTHING = -1,
- RIL_ACTION_BW_IN_DBL = -2, //TODO! put actions back
+ RIL_ACTION_NOTHING = 0,
+ RIL_ACTION_BW_IN_DBL = -2, //TODO? Potentially add more actions
RIL_ACTION_BW_IN_HLV = -3,
- RIL_ACTION_BW_IN_INC = 0,
- RIL_ACTION_BW_IN_DEC = 1,
+ RIL_ACTION_BW_IN_INC = 1,
+ RIL_ACTION_BW_IN_DEC = 2,
RIL_ACTION_BW_OUT_DBL = -4,
RIL_ACTION_BW_OUT_HLV = -5,
- RIL_ACTION_BW_OUT_INC = -6,
- RIL_ACTION_BW_OUT_DEC = -7,
- RIL_ACTION_TYPE_NUM = 1
+ RIL_ACTION_BW_OUT_INC = 3,
+ RIL_ACTION_BW_OUT_DEC = 4,
+ RIL_ACTION_TYPE_NUM = 5
};
enum RIL_Algorithm
RIL_ALGO_Q = 1
};
+enum RIL_Select
+{
+ RIL_SELECT_SOFTMAX = 0,
+ RIL_SELECT_EGREEDY = 1
+};
+
+enum RIL_Welfare
+{
+ RIL_WELFARE_NASH,
+ RIL_WELFARE_EGALITARIAN
+};
+
enum RIL_E_Modification
{
- RIL_E_SET,
+ RIL_E_DECAY,
RIL_E_ZERO,
RIL_E_ACCUMULATE,
RIL_E_REPLACE
*/
double lambda;
+ /**
+ * Whether to accumulate or replace eligibility traces
+ */
+ enum RIL_E_Modification eligibility_trace_mode;
+
+ /**
+ * Initial softmax action-selection temperature
+ */
+ double temperature_init;
+
+ /**
+ * Softmax action-selection temperature
+ */
+ double temperature;
+
+ /**
+ * Decay factor of the temperature value
+ */
+ double temperature_decay;
+
+ /**
+ * Which measure of social welfare should be used
+ */
+ enum RIL_Welfare social_welfare;
+
+ /**
+ * State space divisor
+ */
+ unsigned long long rbf_divisor;
+
+ /**
+ * Action selection strategy;
+ */
+ enum RIL_Select select;
+
+ /**
+ * Initial exploration ratio value
+ */
+ double epsilon_init;
+
/**
* Ratio, with what probability an agent should explore in the e-greed policy
*/
- double explore_ratio;
+ double epsilon;
/**
- * How big the share of the global part of the reward signal is
+ * Decay factor of the explore ratio
*/
- double reward_global_share;
+ double epsilon_decay;
/**
* Minimal interval time between steps in milliseconds
struct ATS_Address *address_naked;
};
+
struct RIL_Peer_Agent
{
/**
/**
* Last perceived state feature vector
*/
- double * s_old;
+ double *s_old;
/**
* Last chosen action
int a_old;
/**
- * Eligibility trace vector
+ * Eligibility traces
+ */
+ double ** E;
+
+ /**
+ * Whether to reset the eligibility traces to 0 after a Q-exploration step
*/
- double * e;
+ int eligibility_reset;
/**
* Address in use
*/
- struct ATS_Address * address_inuse;
+ struct ATS_Address *address_inuse;
/**
* Head of addresses DLL
*/
- struct RIL_Address_Wrapped * addresses_head;
+ struct RIL_Address_Wrapped *addresses_head;
/**
* Tail of addresses DLL
*/
- struct RIL_Address_Wrapped * addresses_tail;
+ struct RIL_Address_Wrapped *addresses_tail;
/**
* Inbound bandwidth assigned by the agent
*/
- unsigned long long bw_in;
+ uint32_t bw_in;
/**
* Outbound bandwidth assigned by the agent
*/
- unsigned long long bw_out;
+ uint32_t bw_out;
/**
* Flag whether a suggestion has to be issued
/**
* The address which has to be issued
*/
- struct ATS_Address * suggestion_address;
+ struct ATS_Address *suggestion_address;
+
+ /**
+ * The agent's last objective value
+ */
+ double objective_old;
+
+ /**
+ * NOP bonus
+ */
+ double nop_bonus;
};
-struct RIL_Network
+struct RIL_Scope
{
/**
* ATS network type
*/
- enum GNUNET_ATS_Network_Type type;
+ enum GNUNET_NetworkType type;
/**
* Total available inbound bandwidth
*/
- unsigned long long bw_in_available;
+ uint32_t bw_in_available;
/**
* Bandwidth inbound assigned in network after last step
*/
- unsigned long long bw_in_assigned;
+ uint32_t bw_in_assigned;
+
+ /**
+ * Bandwidth inbound actually utilized in the network
+ */
+ uint32_t bw_in_utilized;
/**
* Total available outbound bandwidth
*/
- unsigned long long bw_out_available;
+ uint32_t bw_out_available;
/**
- * * Bandwidth outbound assigned in network after last step
+ * Bandwidth outbound assigned in network after last step
*/
unsigned long long bw_out_assigned;
+
+ /**
+ * Bandwidth outbound actually utilized in the network
+ */
+ unsigned long long bw_out_utilized;
+
+ /**
+ * Number of active agents in scope
+ */
+ unsigned int active_agent_count;
+
+ /**
+ * The social welfare achieved in the scope
+ */
+ double social_welfare;
};
/**
/**
* The solver-plugin environment of the solver-plugin API
*/
- struct GNUNET_ATS_PluginEnvironment *plugin_envi;
-
- /**
- * Statistics handle
- */
- struct GNUNET_STATISTICS_Handle *stats;
+ struct GNUNET_ATS_PluginEnvironment *env;
/**
* Number of performed steps
/**
* Task identifier of the next time-step to be executed
*/
- GNUNET_SCHEDULER_TaskIdentifier step_next_task_id;
+ struct GNUNET_SCHEDULER_Task * step_next_task_id;
/**
* Variable discount factor, dependent on time between steps
*/
double global_discount_integrated;
- /**
- * State vector for networks for the current step
- */
- double *global_state_networks;
-
/**
* Lock for bulk operations
*/
/**
* Array of networks with global assignment state
*/
- struct RIL_Network * network_entries;
+ struct RIL_Scope * network_entries;
/**
* Networks count
};
/*
- * Private functions
+ * "Private" functions
* ---------------------------
*/
-static int
-ril_count_agents(struct GAS_RIL_Handle * solver);
-
-static double
-agent_get_utility (struct RIL_Peer_Agent *agent)
-{
- return (double) agent->bw_in;
-}
-
/**
* Estimate the current action-value for state s and action a
*
* @return estimation value
*/
static double
-agent_estimate_q (struct RIL_Peer_Agent *agent, double *state, int action)
+agent_q (struct RIL_Peer_Agent *agent,
+ const double *state,
+ int action)
{
- int i;
- double result = 0;
+ unsigned int i;
+ double result = 0.0;
for (i = 0; i < agent->m; i++)
- {
result += state[i] * agent->W[action][i];
- }
-
- GNUNET_assert(!isnan(result));
+ /* prevent crashes if learning diverges */
+ if (isnan(result))
+ return isnan(result) * UINT32_MAX;
if (isinf(result))
- {
- return isinf(result) * UINT32_MAX; //TODO! prevent crash when learning diverges
- }
+ return isinf(result) * UINT32_MAX;
return result;
}
-/**
- * Decide whether to do exploration (i.e. taking a new action) or exploitation (i.e. taking the
- * currently estimated best action) in the current step
- *
- * @param agent agent performing the step
- * @return yes, if exploring
- */
-static int
-agent_decide_exploration (struct RIL_Peer_Agent *agent)
-{
- //TODO? Future Work: Improve exploration/exploitation trade-off by different mechanisms than e-greedy
- double r = (double) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
- UINT32_MAX) / (double) UINT32_MAX;
-
- if (r < agent->envi->parameters.explore_ratio)
- {
- return GNUNET_YES;
- }
- return GNUNET_NO;
-}
-
-
/**
* Get the index of the address in the agent's list.
*
* @return wrapped address
*/
static struct RIL_Address_Wrapped *
-agent_address_get (struct RIL_Peer_Agent *agent, struct ATS_Address *address)
+agent_address_get_wrapped (struct RIL_Peer_Agent *agent, struct ATS_Address *address)
{
struct RIL_Address_Wrapped *cur;
}
+static int
+agent_action_is_possible (struct RIL_Peer_Agent *agent, int action)
+{
+ int address_index;
+
+ switch (action)
+ {
+ case RIL_ACTION_NOTHING:
+ return GNUNET_YES;
+ break;
+ case RIL_ACTION_BW_IN_INC:
+ case RIL_ACTION_BW_IN_DBL:
+ if (agent->bw_in >= RIL_MAX_BW)
+ return GNUNET_NO;
+ else
+ return GNUNET_YES;
+ break;
+ case RIL_ACTION_BW_IN_DEC:
+ case RIL_ACTION_BW_IN_HLV:
+ if (agent->bw_in <= 0)
+ return GNUNET_NO;
+ else
+ return GNUNET_YES;
+ break;
+ case RIL_ACTION_BW_OUT_INC:
+ case RIL_ACTION_BW_OUT_DBL:
+ if (agent->bw_out >= RIL_MAX_BW)
+ return GNUNET_NO;
+ else
+ return GNUNET_YES;
+ break;
+ case RIL_ACTION_BW_OUT_DEC:
+ case RIL_ACTION_BW_OUT_HLV:
+ if (agent->bw_out <= 0)
+ return GNUNET_NO;
+ else
+ return GNUNET_YES;
+ break;
+ default:
+ if ((action >= RIL_ACTION_TYPE_NUM) && (action < agent->n)) //switch address action
+ {
+ address_index = action - RIL_ACTION_TYPE_NUM;
+
+ GNUNET_assert(address_index >= 0);
+ GNUNET_assert(
+ address_index <= agent_address_get_index (agent, agent->addresses_tail->address_naked));
+
+ if ((agent_address_get_index(agent, agent->address_inuse) == address_index) ||
+ agent->address_inuse->active)
+ return GNUNET_NO;
+ else
+ return GNUNET_YES;
+ break;
+ }
+ // error - action does not exist
+ GNUNET_assert(GNUNET_NO);
+ }
+}
+
+
/**
* Gets the action, with the maximal estimated Q-value (i.e. the one currently estimated to bring the
* most reward in the future)
* @return the action promising most future reward
*/
static int
-agent_get_action_best (struct RIL_Peer_Agent *agent, double *state)
+agent_get_action_max (struct RIL_Peer_Agent *agent, double *state)
{
int i;
int max_i = RIL_ACTION_INVALID;
for (i = 0; i < agent->n; i++)
{
- cur_q = agent_estimate_q (agent, state, i);
- if (cur_q > max_q)
+ if (agent_action_is_possible(agent, i))
{
- max_q = cur_q;
- max_i = i;
+ cur_q = agent_q (agent, state, i);
+ if (cur_q > max_q)
+ {
+ max_q = cur_q;
+ max_i = i;
+ }
}
}
return max_i;
}
-
/**
- * Gets any action, to explore the action space from that state
+ * Chooses a random action from the set of possible ones
*
- * @param agent agent performing the calculation
- * @param state the state from which to take the action
- * @return any action
+ * @param agent the agent performing the action
+ * @return the action index
*/
static int
-agent_get_action_explore (struct RIL_Peer_Agent *agent, double *state)
+agent_get_action_random (struct RIL_Peer_Agent *agent)
{
- // TODO?: Future Work: Choose the action for exploration, which has been explored the least in this state
- return GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, agent->n);
+ int i;
+ int is_possible[agent->n];
+ int sum = 0;
+ int r;
+
+ for (i = 0; i<agent->n; i++)
+ {
+ if (agent_action_is_possible(agent, i))
+ {
+ is_possible[i] = GNUNET_YES;
+ sum++;
+ }
+ else
+ {
+ is_possible[i] = GNUNET_NO;
+ }
+ }
+
+ r = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, sum);
+
+ sum = -1;
+ for (i = 0; i<agent->n; i++)
+ {
+ if (is_possible[i])
+ {
+ sum++;
+ if (sum == r)
+ return i;
+ }
+ }
+
+ GNUNET_assert(GNUNET_NO);
+ return RIL_ACTION_INVALID;
}
* @param a_prime the new
*/
static void
-agent_update_weights (struct RIL_Peer_Agent *agent, double reward, double *s_next, int a_prime)
+agent_update (struct RIL_Peer_Agent *agent, double reward, double *s_next, int a_prime)
{
int i;
+ int k;
double delta;
- double *theta = agent->W[agent->a_old];
+ double **theta = agent->W;
delta = agent->envi->global_discount_integrated * reward; //reward
- delta += agent->envi->global_discount_variable * agent_estimate_q (agent, s_next, a_prime); //discounted future value
- delta -= agent_estimate_q (agent, agent->s_old, agent->a_old); //one step
+ delta += agent->envi->global_discount_variable * agent_q (agent, s_next, a_prime); //discounted future value
+ delta -= agent_q (agent, agent->s_old, agent->a_old); //one step
// LOG(GNUNET_ERROR_TYPE_INFO, "update() Step# %llu Q(s,a): %f a: %f r: %f y: %f Q(s+1,a+1) = %f delta: %f\n",
// agent->step_count,
-// agent_estimate_q (agent, agent->s_old, agent->a_old),
+// agent_q (agent, agent->s_old, agent->a_old),
// agent->envi->parameters.alpha,
// reward,
// agent->envi->global_discount_variable,
-// agent_estimate_q (agent, s_next, a_prime),
+// agent_q (agent, s_next, a_prime),
// delta);
- for (i = 0; i < agent->m; i++)
+ for (k = 0; k < agent->n; k++)
{
-// LOG(GNUNET_ERROR_TYPE_INFO, "alpha = %f delta = %f e[%d] = %f\n",
-// agent->envi->parameters.alpha,
-// delta,
-// i,
-// agent->e[i]);
- theta[i] += agent->envi->parameters.alpha * delta * agent->s_old[i];// * agent->e[i];
+ for (i = 0; i < agent->m; i++)
+ {
+ // LOG(GNUNET_ERROR_TYPE_INFO, "alpha = %f delta = %f e[%d] = %f\n",
+ // agent->envi->parameters.alpha,
+ // delta,
+ // i,
+ // agent->e[i]);
+ theta[k][i] += agent->envi->parameters.alpha * delta * agent->E[k][i];
+ }
}
}
/**
* Changes the eligibility trace vector e in various manners:
- * #RIL_E_ACCUMULATE - adds @a f to each component as in accumulating eligibility traces
- * #RIL_E_REPLACE - resets each component to @a f as in replacing traces
- * #RIL_E_SET - multiplies e with discount factor and lambda as in the update rule
+ * #RIL_E_ACCUMULATE - adds @a feature to each component as in accumulating eligibility traces
+ * #RIL_E_REPLACE - resets each component to @a feature as in replacing traces
+ * #RIL_E_DECAY - multiplies e with discount factor and lambda as in the update rule
* #RIL_E_ZERO - sets e to 0 as in Watkin's Q-learning algorithm when exploring and when initializing
*
* @param agent the agent handle
* @param mod the kind of modification
- * @param f how much to change
+ * @param feature the feature vector
+ * @param action the action to take
*/
static void
agent_modify_eligibility (struct RIL_Peer_Agent *agent,
enum RIL_E_Modification mod,
- double *f)
+ double *feature,
+ int action)
{
int i;
- double *e = agent->e;
+ int k;
for (i = 0; i < agent->m; i++)
{
switch (mod)
{
case RIL_E_ACCUMULATE:
- e[i] += f[i];
+ agent->E[action][i] += feature[i];
break;
case RIL_E_REPLACE:
- e[i] = f[i];
+ agent->E[action][i] = agent->E[action][i] > feature[i] ? agent->E[action][i] : feature[i];
break;
- case RIL_E_SET:
- e[i] *= agent->envi->global_discount_variable * agent->envi->parameters.lambda;
+ case RIL_E_DECAY:
+ for (k = 0; k < agent->n; k++)
+ {
+ agent->E[k][i] *= agent->envi->global_discount_variable * agent->envi->parameters.lambda;
+ }
break;
case RIL_E_ZERO:
- e[i] = 0;
+ for (k = 0; k < agent->n; k++)
+ {
+ agent->E[k][i] = 0;
+ }
break;
}
}
}
-
+/**
+ * Informs the environment about the status of the solver
+ *
+ * @param solver
+ * @param op
+ * @param stat
+ */
static void
ril_inform (struct GAS_RIL_Handle *solver,
- enum GAS_Solver_Operation op,
- enum GAS_Solver_Status stat)
+ enum GAS_Solver_Operation op,
+ enum GAS_Solver_Status stat)
{
- if (NULL != solver->plugin_envi->info_cb)
- solver->plugin_envi->info_cb (solver->plugin_envi->info_cb_cls, op, stat, GAS_INFO_NONE);
+ solver->env->info_cb (solver->env->cls,
+ op,
+ stat,
+ GAS_INFO_NONE);
}
+/**
+ * Calculates the maximum bandwidth an agent can assign in a network scope
+ *
+ * @param net
+ */
+static unsigned long long
+ril_get_max_bw (struct RIL_Scope *net)
+{
+ return GNUNET_MIN(2 * GNUNET_MAX(net->bw_in_available, net->bw_out_available), GNUNET_ATS_MaxBandwidth);
+}
/**
* Changes the active assignment suggestion of the handler and invokes the bw_changed callback to
* @param new_address the address which is to be used
* @param new_bw_in the new amount of inbound bandwidth set for this address
* @param new_bw_out the new amount of outbound bandwidth set for this address
- * @param silent disables invocation of the bw_changed callback, if GNUNET_YES
+ * @param silent disables invocation of the bw_changed callback, if #GNUNET_YES
*/
static void
envi_set_active_suggestion (struct GAS_RIL_Handle *solver,
{
int notify = GNUNET_NO;
- LOG(GNUNET_ERROR_TYPE_DEBUG, " set_active_suggestion() for peer '%s'\n", GNUNET_i2s (&agent->peer));
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ " set_active_suggestion() for peer '%s'\n",
+ GNUNET_i2s (&agent->peer));
//address change
if (agent->address_inuse != new_address)
if (NULL != agent->address_inuse)
{
agent->address_inuse->active = GNUNET_NO;
- agent->address_inuse->assigned_bw_in.value__ = htonl (0);
- agent->address_inuse->assigned_bw_out.value__ = htonl (0);
+ agent->address_inuse->assigned_bw_in = 0;
+ agent->address_inuse->assigned_bw_out = 0;
}
if (NULL != new_address)
{
LOG(GNUNET_ERROR_TYPE_DEBUG, " set address active: %s\n", agent->is_active ? "yes" : "no");
new_address->active = agent->is_active;
- new_address->assigned_bw_in.value__ = htonl (agent->bw_in);
- new_address->assigned_bw_out.value__ = htonl (agent->bw_out);
+ new_address->assigned_bw_in = agent->bw_in;
+ new_address->assigned_bw_out = agent->bw_out;
}
notify |= GNUNET_YES;
}
if (agent->bw_in != new_bw_in)
{
agent->bw_in = new_bw_in;
- new_address->assigned_bw_in.value__ = htonl (new_bw_in);
+ new_address->assigned_bw_in = new_bw_in;
notify |= GNUNET_YES;
}
if (agent->bw_out != new_bw_out)
{
agent->bw_out = new_bw_out;
- new_address->assigned_bw_out.value__ = htonl (new_bw_out);
+ new_address->assigned_bw_out = new_bw_out;
notify |= GNUNET_YES;
}
}
}
else if (agent->address_inuse)
{
- //disconnect case, no new address
- GNUNET_assert(0 == ntohl (agent->address_inuse->assigned_bw_in.value__));
- GNUNET_assert(0 == ntohl (agent->address_inuse->assigned_bw_out.value__));
+ /* disconnect case, no new address */
+ GNUNET_assert(0 == agent->address_inuse->assigned_bw_in);
+ GNUNET_assert(0 == agent->address_inuse->assigned_bw_out);
agent->bw_in = 0;
agent->bw_out = 0;
}
-static unsigned long long
-ril_network_get_assigned (struct GAS_RIL_Handle *solver, enum GNUNET_ATS_Network_Type type, int direction_in)
+/**
+ * Allocates a state vector and fills it with the features present
+ * @param solver the solver handle
+ * @param agent the agent handle
+ * @return pointer to the state vector
+ */
+static double *
+envi_get_state (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent)
{
- struct RIL_Peer_Agent *cur;
- struct RIL_Network *net;
- unsigned long long sum = 0;
+ double *state;
+ double y[2];
+ double x[2];
+ double d[2];
+ double sigma;
+ double f;
+ int m;
+ int i;
+ int k;
+ unsigned long long max_bw;
- for (cur = solver->agents_head; NULL != cur; cur = cur->next)
+ state = GNUNET_malloc (sizeof(double) * agent->m);
+
+ max_bw = ril_get_max_bw((struct RIL_Scope *) agent->address_inuse->solver_information);
+
+ y[0] = (double) agent->bw_out;
+ y[1] = (double) agent->bw_in;
+
+ m = agent_address_get_index (agent, agent->address_inuse) * (solver->parameters.rbf_divisor+1) * (solver->parameters.rbf_divisor+1);
+ for (i = 0; i <= solver->parameters.rbf_divisor; i++)
{
- if (cur->is_active && cur->address_inuse)
+ for (k = 0; k <= solver->parameters.rbf_divisor; k++)
{
- net = cur->address_inuse->solver_information;
- if (net->type == type)
- {
- if (direction_in)
- sum += cur->bw_in;
- else
- sum += cur->bw_out;
- }
+ x[0] = (double) i * (double) max_bw / (double) solver->parameters.rbf_divisor;
+ x[1] = (double) k * (double) max_bw / (double) solver->parameters.rbf_divisor;
+ d[0] = x[0]-y[0];
+ d[1] = x[1]-y[1];
+ sigma = (((double) max_bw / ((double) solver->parameters.rbf_divisor + 1)) * 0.5);
+ f = exp(-((d[0]*d[0] + d[1]*d[1]) / (2 * sigma * sigma)));
+ state[m++] = f;
}
}
- return sum;
+ return state;
}
-//static void
-//envi_state_networks (struct GAS_RIL_Handle *solver)
-//{
-// int i;
-// struct RIL_Network net;
-// int overutilized_in;
-// int overutilized_out;
-//
-// for (i = 0; i < solver->networks_count; i++)
-// {
-// net = solver->network_entries[i];
-//
-// overutilized_in = net.bw_in_assigned > net.bw_in_available;
-// overutilized_out = net.bw_out_assigned > net.bw_out_available;
-//
-// solver->global_state_networks[i * RIL_FEATURES_NETWORK_COUNT + 0] = ((double) net.bw_in_assigned / (double) net.bw_in_available)*10;
-// solver->global_state_networks[i * RIL_FEATURES_NETWORK_COUNT + 1] = (double) overutilized_in;
-// solver->global_state_networks[i * RIL_FEATURES_NETWORK_COUNT + 2] = ((double) net.bw_out_assigned / (double) net.bw_out_available)*10;
-// solver->global_state_networks[i * RIL_FEATURES_NETWORK_COUNT + 3] = (double) overutilized_out;
-// }
-//}
/**
- * Allocates a state vector and fills it with the features present
- * @param solver the solver handle
- * @param agent the agent handle
- * @return pointer to the state vector
+ * Returns the utility value of the connection an agent manages
+ *
+ * @param agent the agent in question
+ * @return the utility value
*/
-static double *
-envi_get_state (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent)
+static double
+agent_get_utility (struct RIL_Peer_Agent *agent)
{
-// int i;
-// int k;
- double *state = GNUNET_malloc (sizeof (double) * agent->m);
-// struct RIL_Address_Wrapped *cur_address;
-// const double *preferences;
-// const double *properties;
- struct RIL_Network *net;
-
- //copy global networks state
-// for (i = 0; i < solver->networks_count * RIL_FEATURES_NETWORK_COUNT; i++)
-// {
-// state[i] = solver->global_state_networks[i];
-// }
+ const double *preferences;
+ double delay_atsi;
+ double delay_norm;
+ double pref_match;
- net = agent->address_inuse->solver_information;
+ preferences = agent->envi->env->get_preferences (agent->envi->env->cls,
+ &agent->peer);
- state[0] = 1;
- state[1] = (double) net->bw_in_assigned / (double) GNUNET_ATS_MaxBandwidth;
- state[2] = GNUNET_MIN((double) (net->bw_in_available - net->bw_in_assigned), 0) / (double) GNUNET_ATS_MaxBandwidth;
-
-// LOG(GNUNET_ERROR_TYPE_INFO, "get_state() state[0] = %f\n", state[0]);
-// LOG(GNUNET_ERROR_TYPE_INFO, "get_state() state[1] = %f\n", state[1]);
-//
-// LOG(GNUNET_ERROR_TYPE_INFO, "get_state() W / %08.3f %08.3f \\ \n", agent->W[0][0], agent->W[1][0]);
-// LOG(GNUNET_ERROR_TYPE_INFO, "get_state() W \\ %08.3f %08.3f / \n", agent->W[0][1], agent->W[1][1]);
-
-
- //get peer features
-// preferences = solver->plugin_envi->get_preferences (solver->plugin_envi->get_preference_cls,
-// &agent->peer);
-// for (k = 0; k < GNUNET_ATS_PreferenceCount; k++)
-// {
-// state[i++] = preferences[k];
-// }
-
- //get address specific features
-// for (cur_address = agent->addresses_head; NULL != cur_address; cur_address = cur_address->next)
-// {
-// //when changing the number of address specific state features, change RIL_FEATURES_ADDRESS_COUNT macro
-// state[i++] = cur_address->address_naked->active;
-// state[i++] = cur_address->address_naked->active ? agent->bw_in : 0;
-// state[i++] = cur_address->address_naked->active ? agent->bw_out : 0;
-// properties = solver->plugin_envi->get_property (solver->plugin_envi->get_property_cls,
-// cur_address->address_naked);
-// for (k = 0; k < GNUNET_ATS_QualityPropertiesCount; k++)
-// {
-// state[i++] = properties[k];
-// }
-// }
+ delay_atsi = agent->address_inuse->norm_delay.norm;
+ delay_norm = RIL_UTILITY_DELAY_MAX*exp(-delay_atsi*0.00001);
- return state;
+ pref_match = preferences[GNUNET_ATS_PREFERENCE_LATENCY] * delay_norm;
+ pref_match += preferences[GNUNET_ATS_PREFERENCE_BANDWIDTH] *
+ sqrt((double) (agent->bw_in/RIL_MIN_BW) * (double) (agent->bw_out/RIL_MIN_BW));
+ return pref_match;
}
-///*
-// * For all networks a peer has an address in, this gets the maximum bandwidth which could
-// * theoretically be available in one of the networks. This is used for bandwidth normalization.
-// *
-// * @param agent the agent handle
-// * @param direction_in whether the inbound bandwidth should be considered. Returns the maximum outbound bandwidth if GNUNET_NO
-// */
-//static unsigned long long
-//ril_get_max_bw (struct RIL_Peer_Agent *agent, int direction_in)
-//{
-// /*
-// * get the maximum bandwidth possible for a peer, e.g. among all addresses which addresses'
-// * network could provide the maximum bandwidth if all that bandwidth was used on that one peer.
-// */
-// unsigned long long max = 0;
-// struct RIL_Address_Wrapped *cur;
-// struct RIL_Network *net;
-//
-// for (cur = agent->addresses_head; NULL != cur; cur = cur->next)
-// {
-// net = cur->address_naked->solver_information;
-// if (direction_in)
-// {
-// if (net->bw_in_available > max)
-// {
-// max = net->bw_in_available;
-// }
-// }
-// else
-// {
-// if (net->bw_out_available > max)
-// {
-// max = net->bw_out_available;
-// }
-// }
-// }
-// return max;
-//}
-
-///*
-// * Get the index of the quality-property in question
-// *
-// * @param type the quality property type
-// * @return the index
-// */
-//static int
-//ril_find_property_index (uint32_t type)
-//{
-// int existing_types[] = GNUNET_ATS_QualityProperties;
-// int c;
-// for (c = 0; c < GNUNET_ATS_QualityPropertiesCount; c++)
-// if (existing_types[c] == type)
-// return c;
-// return GNUNET_SYSERR;
-//}
-
-//static int
-//ril_get_atsi (struct ATS_Address *address, uint32_t type)
-//{
-// int c1;
-// GNUNET_assert(NULL != address);
-//
-// if ((NULL == address->atsi) || (0 == address->atsi_count))
-// return 0;
-//
-// for (c1 = 0; c1 < address->atsi_count; c1++)
-// {
-// if (ntohl (address->atsi[c1].type) == type)
-// return ntohl (address->atsi[c1].value);
-// }
-// return 0;
-//}
-
-//static double
-//envi_reward_global (struct GAS_RIL_Handle *solver)
-//{
-// int i;
-// struct RIL_Network net;
-// unsigned int sum_in_available = 0;
-// unsigned int sum_out_available = 0;
-// unsigned int sum_in_assigned = 0;
-// unsigned int sum_out_assigned = 0;
-// double ratio_in;
-// double ratio_out;
-//
-// for (i = 0; i < solver->networks_count; i++)
-// {
-// net = solver->network_entries[i];
-// sum_in_available += net.bw_in_available;
-// sum_in_assigned += net.bw_in_assigned;
-// sum_out_available += net.bw_out_available;
-// sum_out_assigned += net.bw_out_assigned;
-// }
-//
-// ratio_in = ((double) sum_in_assigned) / ((double) sum_in_available);
-// ratio_out = ((double) sum_out_assigned) / ((double) sum_out_available);
-//
-// // global reward in [1,2]
-// return ratio_in +1;
-// return ((ratio_in + ratio_out) / 2) + 1;
-//}
-
-//static double
-//envi_reward_local (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent)
-//{
-// const double *preferences;
-// const double *properties;
-// int prop_index;
-// double pref_match = 0;
-// double bw_norm;
-// double dl_norm;
-//
-// preferences = solver->plugin_envi->get_preferences (solver->plugin_envi->get_preference_cls,
-// &agent->peer);
-// properties = solver->plugin_envi->get_property (solver->plugin_envi->get_property_cls,
-// agent->address_inuse);
-//
-// // delay in [0,1]
-// prop_index = ril_find_property_index (GNUNET_ATS_QUALITY_NET_DELAY);
-// dl_norm = 2 - properties[prop_index]; //invert property as we want to maximize for lower latencies
-//
-// // utilization in [0,1]
-// bw_norm = (((double) ril_get_atsi (agent->address_inuse, GNUNET_ATS_UTILIZATION_IN)
-// / (double) ril_get_max_bw (agent, GNUNET_YES))
-// + ((double) ril_get_atsi (agent->address_inuse, GNUNET_ATS_UTILIZATION_OUT)
-// / (double) ril_get_max_bw (agent, GNUNET_NO))) / 2;
-//
-// // preference matching in [0,4]
-// pref_match += (preferences[GNUNET_ATS_PREFERENCE_LATENCY] * dl_norm);
-// pref_match += (preferences[GNUNET_ATS_PREFERENCE_BANDWIDTH] * bw_norm);
-//
-// // local reward in [1,2]
-// return (pref_match / 4) +1;
-//}
-
+/**
+ * Calculates the social welfare within a network scope according to what social
+ * welfare measure is set in the configuration.
+ *
+ * @param solver the solver handle
+ * @param scope the network scope in question
+ * @return the social welfare value
+ */
static double
-envi_get_collective_utility (struct GAS_RIL_Handle *solver)
+ril_network_get_social_welfare (struct GAS_RIL_Handle *solver, struct RIL_Scope *scope)
{
- //TODO! add nash product
struct RIL_Peer_Agent *cur;
- double result = RIL_UTILITY_MAX;
+ double result;
- for (cur = solver->agents_head; NULL != cur; cur = cur->next)
+ switch (solver->parameters.social_welfare)
{
- if (cur->is_active)
+ case RIL_WELFARE_EGALITARIAN:
+ result = DBL_MAX;
+ for (cur = solver->agents_head; NULL != cur; cur = cur->next)
{
- if (cur->address_inuse)
+ if (cur->is_active && cur->address_inuse && (cur->address_inuse->solver_information == scope))
{
result = GNUNET_MIN(result, agent_get_utility(cur));
}
}
+ return result;
+
+ case RIL_WELFARE_NASH:
+ result = 0;
+ for (cur = solver->agents_head; NULL != cur; cur = cur->next)
+ {
+ if (cur->is_active && cur->address_inuse && (cur->address_inuse->solver_information == scope))
+ {
+ result *= pow(agent_get_utility(cur), 1.0 / (double) scope->active_agent_count);
+ }
+ }
+ return result;
}
+ GNUNET_assert(GNUNET_NO);
+ return 1;
+}
- return result;
+static double
+envi_get_penalty (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent)
+{
+ struct RIL_Scope *net;
+ unsigned long long over_max;
+ unsigned long long over_in = 0;
+ unsigned long long over_out = 0;
+
+ net = agent->address_inuse->solver_information;
+
+ if (net->bw_in_utilized > net->bw_in_available)
+ {
+ over_in = net->bw_in_utilized - net->bw_in_available;
+ if (RIL_ACTION_BW_IN_INC == agent->a_old)
+ {
+ /* increase quadratically */
+ over_in *= over_in;
+ }
+ }
+ if (net->bw_out_utilized > net->bw_out_available)
+ {
+ over_out = net->bw_out_utilized - net->bw_out_available;
+ if (RIL_ACTION_BW_OUT_INC == agent->a_old)
+ {
+ /* increase quadratically */
+ over_out *= over_out;
+ }
+ }
+ over_max = (over_in + over_out) / (RIL_MIN_BW * RIL_MIN_BW);
+
+ return -1.0 * (double) over_max;
}
/**
static double
envi_get_reward (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent)
{
- struct RIL_Network *net;
-
- unsigned long long objective;
+ struct RIL_Scope *net;
+ double objective;
+ double delta;
+ double steady;
+ double penalty;
+ double reward;
net = agent->address_inuse->solver_information;
- if (net->bw_in_assigned > net->bw_in_available)
+
+ penalty = envi_get_penalty(solver, agent);
+ objective = (agent_get_utility (agent) + net->social_welfare) / 2;
+ delta = objective - agent->objective_old;
+ agent->objective_old = objective;
+
+ if (delta != 0 && penalty == 0)
{
- objective = net->bw_in_available - net->bw_in_assigned;
+ agent->nop_bonus = delta * RIL_NOP_DECAY;
}
else
{
- objective = envi_get_collective_utility(solver);
+ agent->nop_bonus *= RIL_NOP_DECAY;
}
- return objective;
+ steady = (RIL_ACTION_NOTHING == agent->a_old) ? agent->nop_bonus : 0;
+
+ reward = delta + steady;
+ return reward + penalty;
}
/**
int direction_in)
{
unsigned long long new_bw;
+ unsigned long long max_bw;
+
+ max_bw = ril_get_max_bw((struct RIL_Scope *) agent->address_inuse->solver_information);
if (direction_in)
{
new_bw = agent->bw_in * 2;
- if (new_bw < agent->bw_in || new_bw > GNUNET_ATS_MaxBandwidth)
- new_bw = GNUNET_ATS_MaxBandwidth;
+ if (new_bw < agent->bw_in || new_bw > max_bw)
+ new_bw = max_bw;
envi_set_active_suggestion (solver, agent, agent->address_inuse, new_bw,
agent->bw_out, GNUNET_NO);
}
else
{
new_bw = agent->bw_out * 2;
- if (new_bw < agent->bw_out || new_bw > GNUNET_ATS_MaxBandwidth)
- new_bw = GNUNET_ATS_MaxBandwidth;
+ if (new_bw < agent->bw_out || new_bw > max_bw)
+ new_bw = max_bw;
envi_set_active_suggestion (solver, agent, agent->address_inuse, agent->bw_in,
new_bw, GNUNET_NO);
}
if (direction_in)
{
new_bw = agent->bw_in / 2;
- if (new_bw < MIN_BW || new_bw > agent->bw_in)
- new_bw = MIN_BW;
+ if (new_bw <= 0 || new_bw > agent->bw_in)
+ new_bw = 0;
envi_set_active_suggestion (solver, agent, agent->address_inuse, new_bw, agent->bw_out,
GNUNET_NO);
}
else
{
new_bw = agent->bw_out / 2;
- if (new_bw < MIN_BW || new_bw > agent->bw_out)
- new_bw = MIN_BW;
+ if (new_bw <= 0 || new_bw > agent->bw_out)
+ new_bw = 0;
envi_set_active_suggestion (solver, agent, agent->address_inuse, agent->bw_in, new_bw,
GNUNET_NO);
}
envi_action_bw_inc (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent, int direction_in)
{
unsigned long long new_bw;
+ unsigned long long max_bw;
+
+ max_bw = ril_get_max_bw((struct RIL_Scope *) agent->address_inuse->solver_information);
if (direction_in)
{
- new_bw = agent->bw_in + (RIL_INC_DEC_STEP_SIZE * MIN_BW);
- if (new_bw < agent->bw_in || new_bw > GNUNET_ATS_MaxBandwidth)
- new_bw = GNUNET_ATS_MaxBandwidth;
+ new_bw = agent->bw_in + (RIL_INC_DEC_STEP_SIZE * RIL_MIN_BW);
+ if (new_bw < agent->bw_in || new_bw > max_bw)
+ new_bw = max_bw;
envi_set_active_suggestion (solver, agent, agent->address_inuse, new_bw,
agent->bw_out, GNUNET_NO);
}
else
{
- new_bw = agent->bw_out + (RIL_INC_DEC_STEP_SIZE * MIN_BW);
- if (new_bw < agent->bw_out || new_bw > GNUNET_ATS_MaxBandwidth)
- new_bw = GNUNET_ATS_MaxBandwidth;
+ new_bw = agent->bw_out + (RIL_INC_DEC_STEP_SIZE * RIL_MIN_BW);
+ if (new_bw < agent->bw_out || new_bw > max_bw)
+ new_bw = max_bw;
envi_set_active_suggestion (solver, agent, agent->address_inuse, agent->bw_in,
new_bw, GNUNET_NO);
}
if (direction_in)
{
- new_bw = agent->bw_in - (RIL_INC_DEC_STEP_SIZE * MIN_BW);
- if (new_bw < MIN_BW || new_bw > agent->bw_in)
- new_bw = MIN_BW;
+ new_bw = agent->bw_in - (RIL_INC_DEC_STEP_SIZE * RIL_MIN_BW);
+ if (new_bw <= 0 || new_bw > agent->bw_in)
+ new_bw = 0;
envi_set_active_suggestion (solver, agent, agent->address_inuse, new_bw, agent->bw_out,
GNUNET_NO);
}
else
{
- new_bw = agent->bw_out - (RIL_INC_DEC_STEP_SIZE * MIN_BW);
- if (new_bw < MIN_BW || new_bw > agent->bw_out)
- new_bw = MIN_BW;
+ new_bw = agent->bw_out - (RIL_INC_DEC_STEP_SIZE * RIL_MIN_BW);
+ if (new_bw <= 0 || new_bw > agent->bw_out)
+ new_bw = 0;
envi_set_active_suggestion (solver, agent, agent->address_inuse, agent->bw_in, new_bw,
GNUNET_NO);
}
struct RIL_Address_Wrapped *cur;
int i = 0;
+ //cur = agent_address_get_wrapped(agent, agent->address_inuse);
+
for (cur = agent->addresses_head; NULL != cur; cur = cur->next)
{
if (i == address_index)
}
/**
- * Performs one step of the Markov Decision Process. Other than in the literature the step starts
- * after having done the last action a_old. It observes the new state s_next and the reward
- * received. Then the coefficient update is done according to the SARSA or Q-learning method. The
+ * Selects the next action using the e-greedy strategy. I.e. with a probability
+ * of (1-e) the action with the maximum expected return will be chosen
+ * (=> exploitation) and with probability (e) a random action will be chosen.
+ * In case the Q-learning rule is set, the function also resets the eligibility
+ * traces in the exploration case (after Watkin's Q-learning).
+ *
+ * @param agent the agent selecting an action
+ * @param state the current state-feature vector
+ * @return the action index
+ */
+static int
+agent_select_egreedy (struct RIL_Peer_Agent *agent, double *state)
+{
+ int action;
+ double r = (double) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ UINT32_MAX) / (double) UINT32_MAX;
+
+ if (r < agent->envi->parameters.epsilon) //explore
+ {
+ action = agent_get_action_random(agent);
+ if (RIL_ALGO_Q == agent->envi->parameters.algorithm)
+ {
+ agent->eligibility_reset = GNUNET_YES;
+ }
+ agent->envi->parameters.epsilon *= agent->envi->parameters.epsilon_decay;
+ return action;
+ }
+ else //exploit
+ {
+ action = agent_get_action_max(agent, state);
+ return action;
+ }
+}
+
+/**
+ * Selects the next action with a probability corresponding to its value. The
+ * probability is calculated using a Boltzmann distribution with a temperature
+ * value. The higher the temperature, the more are the action selection
+ * probabilities the same. With a temperature of 0, the selection is greedy,
+ * i.e. always the action with the highest value is chosen.
+ * @param agent
+ * @param state
+ * @return
+ */
+static int
+agent_select_softmax (struct RIL_Peer_Agent *agent, double *state)
+{
+ int i;
+ int a_max;
+ double eqt[agent->n];
+ double p[agent->n];
+ double sum = 0;
+ double r;
+
+ a_max = agent_get_action_max(agent, state);
+
+ for (i=0; i<agent->n; i++)
+ {
+ if (agent_action_is_possible(agent, i))
+ {
+ eqt[i] = exp(agent_q(agent,state,i) / agent->envi->parameters.temperature);
+ if (isinf (eqt[i]))
+ eqt[i] = isinf(eqt[i]) * UINT32_MAX;
+ sum += eqt[i];
+ }
+ }
+ for (i=0; i<agent->n; i++)
+ {
+ if (agent_action_is_possible(agent, i))
+ {
+ p[i] = eqt[i]/sum;
+ }
+ else
+ {
+ p[i] = 0;
+ }
+ }
+ r = (double) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ UINT32_MAX) / (double) UINT32_MAX;
+ sum = 0;
+ for (i=0; i<agent->n; i++)
+ {
+ if (sum + p[i] > r)
+ {
+ if (i != a_max)
+ {
+ if (RIL_ALGO_Q == agent->envi->parameters.algorithm)
+ agent->eligibility_reset = GNUNET_YES;
+ agent->envi->parameters.temperature *= agent->envi->parameters.temperature_decay;
+ }
+ return i;
+ }
+ sum += p[i];
+ }
+ GNUNET_assert(GNUNET_NO);
+ return RIL_ACTION_INVALID;
+}
+
+/**
+ * Select the next action of an agent either according to the e-greedy strategy
+ * or the softmax strategy.
+ *
+ * @param agent the agent in question
+ * @param state the current state-feature vector
+ * @return the action index
+ */
+static int
+agent_select_action (struct RIL_Peer_Agent *agent, double *state)
+{
+ if (agent->envi->parameters.select == RIL_SELECT_EGREEDY)
+ {
+ return agent_select_egreedy(agent, state);
+ }
+ else
+ {
+ return agent_select_softmax(agent, state);
+ }
+}
+
+/**
+ * Performs one step of the Markov Decision Process. Other than in the literature the step starts
+ * after having done the last action a_old. It observes the new state s_next and the reward
+ * received. Then the coefficient update is done according to the SARSA or Q-learning method. The
* next action is put into effect.
*
* @param agent the agent performing the step
agent_step (struct RIL_Peer_Agent *agent)
{
int a_next = RIL_ACTION_INVALID;
- int explore;
+ int a_max;
double *s_next;
double reward;
s_next = envi_get_state (agent->envi, agent);
reward = envi_get_reward (agent->envi, agent);
- explore = agent_decide_exploration (agent);
+
+ if (agent->eligibility_reset)
+ {
+ agent_modify_eligibility(agent, RIL_E_ZERO, NULL, -1);
+ agent->eligibility_reset = GNUNET_NO;
+ }
+ else
+ {
+ agent_modify_eligibility (agent, RIL_E_DECAY, NULL, -1);
+ }
+ if (RIL_ACTION_INVALID != agent->a_old)
+ {
+ agent_modify_eligibility (agent, agent->envi->parameters.eligibility_trace_mode, agent->s_old, agent->a_old);
+ }
switch (agent->envi->parameters.algorithm)
{
case RIL_ALGO_SARSA:
- if (explore)
- {
- a_next = agent_get_action_explore (agent, s_next);
- }
- else
- {
- a_next = agent_get_action_best (agent, s_next);
- }
+ a_next = agent_select_action (agent, s_next);
if (RIL_ACTION_INVALID != agent->a_old)
{
//updates weights with selected action (on-policy), if not first step
- agent_update_weights (agent, reward, s_next, a_next);
- agent_modify_eligibility (agent, RIL_E_SET, s_next);
+ agent_update (agent, reward, s_next, a_next);
}
break;
case RIL_ALGO_Q:
- a_next = agent_get_action_best (agent, s_next);
+ a_max = agent_get_action_max (agent, s_next);
if (RIL_ACTION_INVALID != agent->a_old)
{
//updates weights with best action, disregarding actually selected action (off-policy), if not first step
- agent_update_weights (agent, reward, s_next, a_next);
- }
- if (explore)
- {
- a_next = agent_get_action_explore (agent, s_next);
- agent_modify_eligibility (agent, RIL_E_ZERO, NULL);
- }
- else
- {
- a_next = agent_get_action_best (agent, s_next);
- agent_modify_eligibility (agent, RIL_E_SET, s_next);
+ agent_update (agent, reward, s_next, a_max);
}
+ a_next = agent_select_action (agent, s_next);
break;
}
GNUNET_assert(RIL_ACTION_INVALID != a_next);
- agent_modify_eligibility (agent, RIL_E_ACCUMULATE, s_next);
-
-// GNUNET_log (GNUNET_ERROR_TYPE_INFO, "step() Step# %llu R: %f IN %llu OUT %llu A: %d\n",
-// agent->step_count,
-// reward,
-// agent->bw_in/1024,
-// agent->bw_out/1024,
-// a_next);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "step() Step# %llu R: %f IN %llu OUT %llu A: %d\n",
+ agent->step_count,
+ reward,
+ agent->bw_in/1024,
+ agent->bw_out/1024,
+ a_next);
envi_do_action (agent->envi, agent, a_next);
agent->step_count += 1;
}
+/**
+ * Prototype of the ril_step() procedure
+ *
+ * @param solver the solver handle
+ */
static void
ril_step (struct GAS_RIL_Handle *solver);
+
/**
* Task for the scheduler, which performs one step and lets the solver know that
* no further step is scheduled.
*
* @param cls the solver handle
- * @param tc the task context for the scheduler
*/
static void
-ril_step_scheduler_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+ril_step_scheduler_task (void *cls)
{
struct GAS_RIL_Handle *solver = cls;
- solver->step_next_task_id = GNUNET_SCHEDULER_NO_TASK;
+ solver->step_next_task_id = NULL;
ril_step (solver);
}
+/**
+ * Determines how much of the available bandwidth is assigned. If more is
+ * assigned than available it returns 1. The function is used to determine the
+ * step size of the adaptive stepping.
+ *
+ * @param solver the solver handle
+ * @return the ratio
+ */
static double
ril_get_used_resource_ratio (struct GAS_RIL_Handle *solver)
{
int i;
- struct RIL_Network net;
+ struct RIL_Scope net;
unsigned long long sum_assigned = 0;
unsigned long long sum_available = 0;
double ratio;
net = solver->network_entries[i];
if (net.bw_in_assigned > 0) //only consider scopes where an address is actually active
{
- sum_assigned += net.bw_in_assigned;
- sum_assigned += net.bw_out_assigned;
+ sum_assigned += net.bw_in_utilized;
+ sum_assigned += net.bw_out_utilized;
sum_available += net.bw_in_available;
sum_available += net.bw_out_available;
}
ratio = 0;
}
- return ratio > 1 ? 1 : ratio; //overutilization possible, cap at 1
+ return ratio > 1 ? 1 : ratio; //overutilization is possible, cap at 1
}
/**
* @param type the network type
* @return the network struct
*/
-static struct RIL_Network *
+static struct RIL_Scope *
ril_get_network (struct GAS_RIL_Handle *s, uint32_t type)
{
int i;
return NULL ;
}
+/**
+ * Determines whether more connections are allocated in a network scope, than
+ * they would theoretically fit. This is used as a heuristic to determine,
+ * whether a new connection can be allocated or not.
+ *
+ * @param solver the solver handle
+ * @param network the network scope in question
+ * @return GNUNET_YES if there are theoretically enough resources left
+ */
static int
-ril_network_is_not_full (struct GAS_RIL_Handle *solver, enum GNUNET_ATS_Network_Type network)
+ril_network_is_not_full (struct GAS_RIL_Handle *solver, enum GNUNET_NetworkType network)
{
- struct RIL_Network *net;
+ struct RIL_Scope *net;
struct RIL_Peer_Agent *agent;
unsigned long long address_count = 0;
}
net = ril_get_network (solver, network);
- return (net->bw_in_available > MIN_BW * address_count) && (net->bw_out_available > MIN_BW * address_count);
+ return (net->bw_in_available > RIL_MIN_BW * address_count) && (net->bw_out_available > RIL_MIN_BW * address_count);
}
+/**
+ * Unblocks an agent for which a connection request is there, that could not
+ * be satisfied. Iterates over the addresses of the agent, if one of its
+ * addresses can now be allocated in its scope the agent is unblocked,
+ * otherwise it remains unchanged.
+ *
+ * @param solver the solver handle
+ * @param agent the agent in question
+ * @param silent
+ */
static void
ril_try_unblock_agent (struct GAS_RIL_Handle *solver, struct RIL_Peer_Agent *agent, int silent)
{
struct RIL_Address_Wrapped *addr_wrap;
- struct RIL_Network *net;
+ struct RIL_Scope *net;
+ unsigned long long start_in;
+ unsigned long long start_out;
for (addr_wrap = agent->addresses_head; NULL != addr_wrap; addr_wrap = addr_wrap->next)
{
if (ril_network_is_not_full(solver, net->type))
{
if (NULL == agent->address_inuse)
- envi_set_active_suggestion (solver, agent, addr_wrap->address_naked, MIN_BW, MIN_BW, silent);
+ {
+ start_in = net->bw_in_available < net->bw_in_utilized ? (net->bw_in_available - net->bw_in_utilized) / 2 : RIL_MIN_BW;
+ start_out = net->bw_out_available < net->bw_out_utilized ? (net->bw_out_available - net->bw_out_utilized) / 2 : RIL_MIN_BW;
+ envi_set_active_suggestion (solver, agent, addr_wrap->address_naked, start_in, start_out, silent);
+ }
return;
}
}
agent->address_inuse = NULL;
}
+/**
+ * Determines how much the reward needs to be discounted depending on the amount
+ * of time, which has passed since the last time-step.
+ *
+ * @param solver the solver handle
+ */
static void
ril_calculate_discount (struct GAS_RIL_Handle *solver)
{
struct GNUNET_TIME_Relative time_delta;
double tau;
- // MDP case - remove when debugged
+ // MDP case only for debugging purposes
if (solver->simulate)
{
solver->global_discount_variable = solver->parameters.gamma;
/ (double) solver->parameters.step_time_min.rel_value_us;
//calculate reward discounts (once per step for all agents)
- solver->global_discount_variable = pow (M_E, ((-1.) * ((double) solver->parameters.beta) * tau));
- solver->global_discount_integrated = (1. - solver->global_discount_variable)
+ solver->global_discount_variable = pow (M_E, ((-1.0) * ((double) solver->parameters.beta) * tau));
+ solver->global_discount_integrated = (1.0 - solver->global_discount_variable)
/ (double) solver->parameters.beta;
}
+/**
+ * Count the number of active agents/connections in a network scope
+ *
+ * @param solver the solver handle
+ * @param scope the network scope in question
+ * @return the number of allocated connections
+ */
+static int
+ril_network_count_active_agents (struct GAS_RIL_Handle *solver, struct RIL_Scope *scope)
+{
+ int c = 0;
+ struct RIL_Peer_Agent *cur_agent;
+
+ for (cur_agent = solver->agents_head; NULL != cur_agent; cur_agent = cur_agent->next)
+ {
+ if (cur_agent->is_active && cur_agent->address_inuse && (cur_agent->address_inuse->solver_information == scope))
+ {
+ c++;
+ }
+ }
+ return c;
+}
+
+/**
+ * Calculates how much bandwidth is assigned in sum in a network scope, either
+ * in the inbound or in the outbound direction.
+ *
+ * @param solver the solver handle
+ * @param type the type of the network scope in question
+ * @param direction_in GNUNET_YES if the inbound direction should be summed up,
+ * otherwise the outbound direction will be summed up
+ * @return the sum of the assigned bandwidths
+ */
+static unsigned long long
+ril_network_get_assigned (struct GAS_RIL_Handle *solver, enum GNUNET_NetworkType type, int direction_in)
+{
+ struct RIL_Peer_Agent *cur;
+ struct RIL_Scope *net;
+ unsigned long long sum = 0;
+
+ for (cur = solver->agents_head; NULL != cur; cur = cur->next)
+ {
+ if (cur->is_active && cur->address_inuse)
+ {
+ net = cur->address_inuse->solver_information;
+ if (net->type == type)
+ {
+ if (direction_in)
+ sum += cur->bw_in;
+ else
+ sum += cur->bw_out;
+ }
+ }
+ }
+
+ return sum;
+}
+
+/**
+ * Calculates how much bandwidth is actually utilized in sum in a network scope,
+ * either in the inbound or in the outbound direction.
+ *
+ * @param solver the solver handle
+ * @param type the type of the network scope in question
+ * @param direction_in GNUNET_YES if the inbound direction should be summed up,
+ * otherwise the outbound direction will be summed up
+ * @return the sum of the utilized bandwidths (in bytes/second)
+ */
+static unsigned long long
+ril_network_get_utilized (struct GAS_RIL_Handle *solver, enum GNUNET_NetworkType type, int direction_in)
+{
+ struct RIL_Peer_Agent *cur;
+ struct RIL_Scope *net;
+ unsigned long long sum = 0;
+
+ for (cur = solver->agents_head; NULL != cur; cur = cur->next)
+ {
+ if (cur->is_active && cur->address_inuse)
+ {
+ net = cur->address_inuse->solver_information;
+ if (net->type == type)
+ {
+ if (direction_in)
+ sum += cur->address_inuse->norm_utilization_in.norm;
+ else
+ sum += cur->address_inuse->norm_utilization_out.norm;
+ }
+ }
+ }
+
+ return sum;
+}
+
+/**
+ * Retrieves the state of the network scope, so that its attributes are up-to-
+ * date.
+ *
+ * @param solver the solver handle
+ */
static void
-ril_calculate_assigned_bwnet (struct GAS_RIL_Handle *solver)
+ril_networks_update_state (struct GAS_RIL_Handle *solver)
{
int c;
- struct RIL_Network *net;
+ struct RIL_Scope *net;
for (c = 0; c < solver->networks_count; c++)
{
net = &solver->network_entries[c];
net->bw_in_assigned = ril_network_get_assigned(solver, net->type, GNUNET_YES);
+ net->bw_in_utilized = ril_network_get_utilized(solver, net->type, GNUNET_YES);
net->bw_out_assigned = ril_network_get_assigned(solver, net->type, GNUNET_NO);
+ net->bw_out_utilized = ril_network_get_utilized(solver, net->type, GNUNET_NO);
+ net->active_agent_count = ril_network_count_active_agents(solver, net);
+ net->social_welfare = ril_network_get_social_welfare(solver, net);
}
}
offset = (double) solver->parameters.step_time_min.rel_value_us;
y = factor * pow (used_ratio, RIL_INTERVAL_EXPONENT) + offset;
- GNUNET_assert(y <= (double ) solver->parameters.step_time_max.rel_value_us);
- GNUNET_assert(y >= (double ) solver->parameters.step_time_min.rel_value_us);
+ GNUNET_assert(y <= (double) solver->parameters.step_time_max.rel_value_us);
+ GNUNET_assert(y >= (double) solver->parameters.step_time_min.rel_value_us);
- time_next = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MICROSECONDS, (unsigned long long) y);
+ time_next = GNUNET_TIME_relative_saturating_multiply (GNUNET_TIME_UNIT_MICROSECONDS, (unsigned long long) y);
+
+// LOG (GNUNET_ERROR_TYPE_INFO, "ratio: %f, factor: %f, offset: %f, y: %f\n",
+// used_ratio,
+// factor,
+// offset,
+// y);
if (solver->simulate)
{
time_next = GNUNET_TIME_UNIT_ZERO;
}
- if ((GNUNET_SCHEDULER_NO_TASK == solver->step_next_task_id) && (GNUNET_NO == solver->done))
+ if ((NULL == solver->step_next_task_id) && (GNUNET_NO == solver->done))
{
solver->step_next_task_id = GNUNET_SCHEDULER_add_delayed (time_next, &ril_step_scheduler_task,
solver);
/**
* Triggers one step per agent
+ *
* @param solver
*/
static void
}
ril_calculate_discount (solver);
- ril_calculate_assigned_bwnet (solver);
-
- //calculate network state vector
-// envi_state_networks(solver);
+ ril_networks_update_state (solver);
//trigger one step per active, unblocked agent
for (cur = solver->agents_head; NULL != cur; cur = cur->next)
}
}
- ril_calculate_assigned_bwnet (solver);
+ ril_networks_update_state (solver);
- solver->step_count += 1;
+ solver->step_count++;
ril_step_schedule_next (solver);
ril_inform (solver, GAS_OP_SOLVE_STOP, GAS_STAT_SUCCESS);
for (cur = solver->agents_head; NULL != cur; cur = cur->next)
{
if (cur->suggestion_issue) {
- solver->plugin_envi->bandwidth_changed_cb(solver->plugin_envi->bw_changed_cb_cls, cur->suggestion_address);
+ solver->env->bandwidth_changed_cb (solver->env->cls,
+ cur->suggestion_address);
cur->suggestion_issue = GNUNET_NO;
}
}
ril_inform (solver, GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP, GAS_STAT_SUCCESS);
}
-static int
-ril_count_agents (struct GAS_RIL_Handle *solver)
-{
- int c = 0;
- struct RIL_Peer_Agent *cur_agent;
-
- for (cur_agent = solver->agents_head; NULL != cur_agent; cur_agent = cur_agent->next)
- {
- c++;
- }
- return c;
-}
-
+/**
+ * Initializes the matrix W of parameter vectors theta with small random numbers.
+ *
+ * @param agent The respective agent
+ */
static void
-agent_w_start (struct RIL_Peer_Agent *agent)
+agent_w_init (struct RIL_Peer_Agent *agent)
{
- int count;
- struct RIL_Peer_Agent *other;
int i;
int k;
- count = ril_count_agents(agent->envi);
-
for (i = 0; i < agent->n; i++)
{
for (k = 0; k < agent->m; k++)
{
- if (0 == count) {
- agent->W[i][k] = agent->envi->parameters.alpha * (1.0 - 2.0*((double) GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX)/(double)UINT32_MAX));
- }
- else {
- for (other = agent->envi->agents_head; NULL != other; other = other->next)
- {
- agent->W[i][k] += (other->W[i][k] / (double) count);
- }
- }
-
- GNUNET_assert(!isinf(agent->W[i][k]));
+ agent->W[i][k] = agent->envi->parameters.alpha * (1.0 - 2.0 * ((double) GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, UINT32_MAX)/(double) UINT32_MAX));
}
}
}
{
int i;
struct GAS_RIL_Handle * solver = s;
- struct RIL_Peer_Agent * agent = GNUNET_malloc (sizeof (struct RIL_Peer_Agent));
+ struct RIL_Peer_Agent * agent = GNUNET_new (struct RIL_Peer_Agent);
agent->envi = solver;
agent->peer = *peer;
agent->step_count = 0;
agent->is_active = GNUNET_NO;
- agent->bw_in = MIN_BW;
- agent->bw_out = MIN_BW;
+ agent->bw_in = RIL_MIN_BW;
+ agent->bw_out = RIL_MIN_BW;
agent->suggestion_issue = GNUNET_NO;
agent->n = RIL_ACTION_TYPE_NUM;
- agent->m = RIL_FEATURES_INIT_COUNT;
+ agent->m = 0;
agent->W = (double **) GNUNET_malloc (sizeof (double *) * agent->n);
+ agent->E = (double **) GNUNET_malloc (sizeof (double *) * agent->n);
for (i = 0; i < agent->n; i++)
{
agent->W[i] = (double *) GNUNET_malloc (sizeof (double) * agent->m);
+ agent->E[i] = (double *) GNUNET_malloc (sizeof (double) * agent->m);
}
- agent_w_start(agent);
+ agent_w_init(agent);
+ agent->eligibility_reset = GNUNET_NO;
agent->a_old = RIL_ACTION_INVALID;
agent->s_old = GNUNET_malloc (sizeof (double) * agent->m);
- agent->e = (double *) GNUNET_malloc (sizeof (double) * agent->m);
- agent_modify_eligibility (agent, RIL_E_ZERO, NULL);
+ agent->address_inuse = NULL;
+ agent->objective_old = 0;
+ agent->nop_bonus = 0;
return agent;
}
for (i = 0; i < agent->n; i++)
{
- GNUNET_free(agent->W[i]);
+ GNUNET_free_non_null(agent->W[i]);
+ GNUNET_free_non_null(agent->E[i]);
}
- GNUNET_free(agent->W);
- GNUNET_free(agent->e);
- GNUNET_free(agent->s_old);
+ GNUNET_free_non_null(agent->W);
+ GNUNET_free_non_null(agent->E);
+ GNUNET_free_non_null(agent->s_old);
GNUNET_free(agent);
}
* @return whether or not the network is considered active
*/
static int
-ril_network_is_active (struct GAS_RIL_Handle *solver, enum GNUNET_ATS_Network_Type network)
+ril_network_is_active (struct GAS_RIL_Handle *solver, enum GNUNET_NetworkType network)
{
- struct RIL_Network *net;
+ struct RIL_Scope *net;
net = ril_get_network (solver, network);
- return net->bw_out_available >= MIN_BW;
+ return net->bw_out_available >= RIL_MIN_BW;
}
/**
unsigned int bytes_hole;
unsigned int bytes_after;
- GNUNET_assert(old_length > hole_length);
+ GNUNET_assert(old_length >= hole_length);
GNUNET_assert(old_length >= (hole_start + hole_length));
size = element_size * (old_length - hole_length);
else
{
tmpptr = GNUNET_malloc (size);
- memcpy (tmpptr, oldptr, bytes_before);
- memcpy (tmpptr + bytes_before, oldptr + (bytes_before + bytes_hole), bytes_after);
+ GNUNET_memcpy (tmpptr, oldptr, bytes_before);
+ GNUNET_memcpy (tmpptr + bytes_before, oldptr + (bytes_before + bytes_hole), bytes_after);
}
if (NULL != *old)
{
* @param kind the kind to change the preference
* @param pref_rel the normalized preference value for this kind over all clients
*/
-void
+static void
GAS_ril_address_change_preference (void *solver,
- const struct GNUNET_PeerIdentity *peer,
- enum GNUNET_ATS_PreferenceKind kind,
- double pref_rel)
+ const struct GNUNET_PeerIdentity *peer,
+ enum GNUNET_ATS_PreferenceKind kind,
+ double pref_rel)
{
LOG(GNUNET_ERROR_TYPE_DEBUG,
"API_address_change_preference() Preference '%s' for peer '%s' changed to %.2f \n",
GNUNET_ATS_print_preference_type (kind), GNUNET_i2s (peer), pref_rel);
- ril_step (solver);
+ struct GAS_RIL_Handle *s = solver;
+
+ s->parameters.temperature = s->parameters.temperature_init;
+ s->parameters.epsilon = s->parameters.epsilon_init;
+ ril_step (s);
}
+
/**
- * Entry point for the plugin
+ * Add a new address for a peer to the solver
*
- * @param cls pointer to the 'struct GNUNET_ATS_PluginEnvironment'
+ * The address is already contained in the addresses hashmap!
+ *
+ * @param solver the solver Handle
+ * @param address the address to add
+ * @param network network type of this address
*/
-void *
-libgnunet_plugin_ats_ril_init (void *cls)
+static void
+GAS_ril_address_add (void *solver,
+ struct ATS_Address *address,
+ uint32_t network)
{
- struct GNUNET_ATS_PluginEnvironment *env = cls;
- struct GAS_RIL_Handle *solver = GNUNET_new (struct GAS_RIL_Handle);
- struct RIL_Network * cur;
- int c;
- char *string;
+ struct GAS_RIL_Handle *s = solver;
+ struct RIL_Peer_Agent *agent;
+ struct RIL_Address_Wrapped *address_wrapped;
+ struct RIL_Scope *net;
+ unsigned int m_new;
+ unsigned int m_old;
+ unsigned int n_new;
+ unsigned int n_old;
+ int i;
+ unsigned int zero;
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_init() Initializing RIL solver\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "API_address_add()\n");
- GNUNET_assert(NULL != env);
- GNUNET_assert(NULL != env->cfg);
- GNUNET_assert(NULL != env->stats);
- GNUNET_assert(NULL != env->bandwidth_changed_cb);
- GNUNET_assert(NULL != env->get_preferences);
- GNUNET_assert(NULL != env->get_property);
+ net = ril_get_network (s, network);
+ address->solver_information = net;
- if (GNUNET_OK
- != GNUNET_CONFIGURATION_get_value_time (env->cfg, "ats", "RIL_STEP_TIME_MIN",
- &solver->parameters.step_time_min))
+ if (!ril_network_is_active (s, network))
{
- solver->parameters.step_time_min = RIL_DEFAULT_STEP_TIME_MIN;
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "API_address_add() Did not add %s address %s for peer '%s', network does not have enough bandwidth\n",
+ address->plugin, address->addr, GNUNET_i2s (&address->peer));
+ return;
}
- if (GNUNET_OK
- != GNUNET_CONFIGURATION_get_value_time (env->cfg, "ats", "RIL_STEP_TIME_MAX",
- &solver->parameters.step_time_max))
- {
- solver->parameters.step_time_max = RIL_DEFAULT_STEP_TIME_MAX;
- }
- if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_ALGORITHM", &string))
- {
- solver->parameters.algorithm = !strcmp (string, "SARSA") ? RIL_ALGO_SARSA : RIL_ALGO_Q;
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.algorithm = RIL_DEFAULT_ALGORITHM;
- }
- if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_DISCOUNT_BETA", &string))
- {
- solver->parameters.beta = strtod (string, NULL);
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.beta = RIL_DEFAULT_DISCOUNT_BETA;
- }
- if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_DISCOUNT_GAMMA", &string))
- {
- solver->parameters.gamma = strtod (string, NULL);
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.gamma = RIL_DEFAULT_DISCOUNT_GAMMA;
- }
- if (GNUNET_OK
- == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_GRADIENT_STEP_SIZE", &string))
- {
- solver->parameters.alpha = strtod (string, NULL);
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.alpha = RIL_DEFAULT_GRADIENT_STEP_SIZE;
- }
- if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_TRACE_DECAY", &string))
- {
- solver->parameters.lambda = strtod (string, NULL);
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.lambda = RIL_DEFAULT_TRACE_DECAY;
- }
- if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_EXPLORE_RATIO", &string))
- {
- solver->parameters.explore_ratio = strtod (string, NULL);
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.explore_ratio = RIL_DEFAULT_EXPLORE_RATIO;
- }
- if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_GLOBAL_REWARD_SHARE", &string))
- {
- solver->parameters.reward_global_share = strtod (string, NULL);
- GNUNET_free (string);
- }
- else
- {
- solver->parameters.reward_global_share = RIL_DEFAULT_GLOBAL_REWARD_SHARE;
- }
- if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "ats", "RIL_SIMULATE", &solver->simulate))
- {
- solver->simulate = GNUNET_NO;
- }
-
- env->sf.s_add = &GAS_ril_address_add;
- env->sf.s_address_update_property = &GAS_ril_address_property_changed;
- env->sf.s_address_update_session = &GAS_ril_address_session_changed;
- env->sf.s_address_update_inuse = &GAS_ril_address_inuse_changed;
- env->sf.s_address_update_network = &GAS_ril_address_change_network;
- env->sf.s_get = &GAS_ril_get_preferred_address;
- env->sf.s_get_stop = &GAS_ril_stop_get_preferred_address;
- env->sf.s_pref = &GAS_ril_address_change_preference;
- env->sf.s_feedback = &GAS_ril_address_preference_feedback;
- env->sf.s_del = &GAS_ril_address_delete;
- env->sf.s_bulk_start = &GAS_ril_bulk_start;
- env->sf.s_bulk_stop = &GAS_ril_bulk_stop;
-
- solver->plugin_envi = env;
- solver->networks_count = env->network_count;
- solver->network_entries = GNUNET_malloc (env->network_count * sizeof (struct RIL_Network));
- solver->step_count = 0;
- solver->global_state_networks = GNUNET_malloc (solver->networks_count * RIL_FEATURES_NETWORK_COUNT * sizeof (double));
- solver->done = GNUNET_NO;
-
- for (c = 0; c < env->network_count; c++)
- {
- cur = &solver->network_entries[c];
- cur->type = env->networks[c];
- cur->bw_in_available = env->in_quota[c];
- cur->bw_out_available = env->out_quota[c];
- LOG(GNUNET_ERROR_TYPE_INFO, "init() Quotas for %s network: IN %llu - OUT %llu\n", GNUNET_ATS_print_network_type(cur->type), cur->bw_in_available/1024, cur->bw_out_available/1024);
- }
-
- LOG(GNUNET_ERROR_TYPE_INFO, "init() Parameters:\n");
- LOG(GNUNET_ERROR_TYPE_INFO, "init() Algorithm = %s, alpha = %f, beta = %f, lambda = %f\n",
- solver->parameters.algorithm ? "Q" : "SARSA",
- solver->parameters.alpha,
- solver->parameters.beta,
- solver->parameters.lambda);
- LOG(GNUNET_ERROR_TYPE_INFO, "init() explore = %f, global_share = %f\n",
- solver->parameters.explore_ratio,
- solver->parameters.reward_global_share);
-
- return solver;
-}
-
-/**
- * Exit point for the plugin
- *
- * @param cls the solver handle
- */
-void *
-libgnunet_plugin_ats_ril_done (void *cls)
-{
- struct GAS_RIL_Handle *s = cls;
- struct RIL_Peer_Agent *cur_agent;
- struct RIL_Peer_Agent *next_agent;
-
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_done() Shutting down RIL solver\n");
-
- s->done = GNUNET_YES;
-
- cur_agent = s->agents_head;
- while (NULL != cur_agent)
- {
- next_agent = cur_agent->next;
- GNUNET_CONTAINER_DLL_remove(s->agents_head, s->agents_tail, cur_agent);
- agent_die (s, cur_agent);
- cur_agent = next_agent;
- }
-
- if (GNUNET_SCHEDULER_NO_TASK != s->step_next_task_id)
- {
- GNUNET_SCHEDULER_cancel (s->step_next_task_id);
- }
- GNUNET_free(s->network_entries);
- GNUNET_free(s->global_state_networks);
- GNUNET_free(s);
-
- return NULL;
-}
-
-/**
- * Add a new address for a peer to the solver
- *
- * The address is already contained in the addresses hashmap!
- *
- * @param solver the solver Handle
- * @param address the address to add
- * @param network network type of this address
- */
-void
-GAS_ril_address_add (void *solver, struct ATS_Address *address, uint32_t network)
-{
- struct GAS_RIL_Handle *s = solver;
- struct RIL_Peer_Agent *agent;
- struct RIL_Address_Wrapped *address_wrapped;
- struct RIL_Network *net;
- unsigned int m_new;
- unsigned int m_old;
- unsigned int n_new;
- unsigned int n_old;
- int i;
- unsigned int zero;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "API_address_add()\n");
-
- net = ril_get_network (s, network);
- address->solver_information = net;
-
- if (!ril_network_is_active (s, network))
- {
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "API_address_add() Did not add %s address %s for peer '%s', network does not have enough bandwidth\n",
- address->plugin, address->addr, GNUNET_i2s (&address->peer));
- return;
- }
-
- agent = ril_get_agent (s, &address->peer, GNUNET_YES);
-
- //add address
- address_wrapped = GNUNET_malloc (sizeof (struct RIL_Address_Wrapped));
- address_wrapped->address_naked = address;
- GNUNET_CONTAINER_DLL_insert_tail(agent->addresses_head, agent->addresses_tail, address_wrapped);
-
- //increase size of W
- m_new = agent->m + RIL_FEATURES_ADDRESS_COUNT;
- m_old = agent->m;
- n_new = agent->n + 1;
- n_old = agent->n;
-
- GNUNET_array_grow(agent->W, agent->n, n_new);
- for (i = 0; i < n_new; i++)
+
+ s->parameters.temperature = s->parameters.temperature_init;
+ s->parameters.epsilon = s->parameters.epsilon_init;
+
+ agent = ril_get_agent (s, &address->peer, GNUNET_YES);
+
+ //add address
+ address_wrapped = GNUNET_new (struct RIL_Address_Wrapped);
+ address_wrapped->address_naked = address;
+ GNUNET_CONTAINER_DLL_insert_tail(agent->addresses_head, agent->addresses_tail, address_wrapped);
+
+ //increase size of W
+ m_new = agent->m + ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1));
+ m_old = agent->m;
+ n_new = agent->n + 1;
+ n_old = agent->n;
+
+ GNUNET_array_grow(agent->W, agent->n, n_new);
+ agent->n = n_old;
+ GNUNET_array_grow(agent->E, agent->n, n_new);
+ for (i = 0; i < n_new; i++)
{
if (i < n_old)
{
agent->m = m_old;
GNUNET_array_grow(agent->W[i], agent->m, m_new);
+ agent->m = m_old;
+ GNUNET_array_grow(agent->E[i], agent->m, m_new);
}
else
{
zero = 0;
GNUNET_array_grow(agent->W[i], zero, m_new);
+ zero = 0;
+ GNUNET_array_grow(agent->E[i], zero, m_new);
}
}
agent->m = m_old;
GNUNET_array_grow(agent->s_old, agent->m, m_new);
- agent->m = m_old;
- GNUNET_array_grow(agent->e, agent->m, m_new);
-
ril_try_unblock_agent(s, agent, GNUNET_NO);
ril_step (s);
*
* @param solver the solver handle
* @param address the address to remove
- * @param session_only delete only session not whole address
*/
-void
-GAS_ril_address_delete (void *solver, struct ATS_Address *address, int session_only)
+static void
+GAS_ril_address_delete (void *solver,
+ struct ATS_Address *address)
{
struct GAS_RIL_Handle *s = solver;
struct RIL_Peer_Agent *agent;
struct RIL_Address_Wrapped *address_wrapped;
- int address_was_used = address->active;
int address_index;
unsigned int m_new;
unsigned int n_new;
int i;
- struct RIL_Network *net;
+ struct RIL_Scope *net;
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_address_delete() Delete %s%s %s address %s for peer '%s'\n",
- session_only ? "session for " : "", address->active ? "active" : "inactive", address->plugin,
- address->addr, GNUNET_i2s (&address->peer));
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "API_address_delete() Delete %s %s address %s for peer '%s'\n",
+ address->active ? "active" : "inactive",
+ address->plugin,
+ address->addr,
+ GNUNET_i2s (&address->peer));
agent = ril_get_agent (s, &address->peer, GNUNET_NO);
if (NULL == agent)
{
net = address->solver_information;
- GNUNET_assert(!ril_network_is_active (s, net->type));
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "No agent allocated for peer yet, since address was in inactive network\n");
+ GNUNET_assert(! ril_network_is_active (s, net->type));
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "No agent allocated for peer yet, since address was in inactive network\n");
return;
}
+ s->parameters.temperature = s->parameters.temperature_init;
+ s->parameters.epsilon = s->parameters.epsilon_init;
+
address_index = agent_address_get_index (agent, address);
- address_wrapped = agent_address_get (agent, address);
+ address_wrapped = agent_address_get_wrapped (agent, address);
if (NULL == address_wrapped)
{
net = address->solver_information;
- GNUNET_assert(!ril_network_is_active (s, net->type));
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "Address not considered by agent, address was in inactive network\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Address not considered by agent, address was in inactive network\n");
return;
}
-
- GNUNET_CONTAINER_DLL_remove(agent->addresses_head, agent->addresses_tail, address_wrapped);
- GNUNET_free(address_wrapped);
+ GNUNET_CONTAINER_DLL_remove (agent->addresses_head,
+ agent->addresses_tail,
+ address_wrapped);
+ GNUNET_free (address_wrapped);
//decrease W
- m_new = agent->m - RIL_FEATURES_ADDRESS_COUNT;
+ m_new = agent->m - ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1));
n_new = agent->n - 1;
- LOG(GNUNET_ERROR_TYPE_DEBUG, "first\n");
-
for (i = 0; i < agent->n; i++)
{
ril_cut_from_vector ((void **) &agent->W[i], sizeof(double),
- //((s->networks_count * RIL_FEATURES_NETWORK_COUNT)
- ((RIL_FEATURES_NETWORK_COUNT) //TODO! replace, when adding more networks
- + (address_index * RIL_FEATURES_ADDRESS_COUNT)), RIL_FEATURES_ADDRESS_COUNT, agent->m);
- }
- GNUNET_free(agent->W[RIL_ACTION_TYPE_NUM + address_index]);
- LOG(GNUNET_ERROR_TYPE_DEBUG, "second\n");
+ address_index * ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1)),
+ ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1)), agent->m);
+ ril_cut_from_vector ((void **) &agent->E[i], sizeof(double),
+ address_index * ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1)),
+ ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1)), agent->m);
+ }
+ GNUNET_free_non_null(agent->W[RIL_ACTION_TYPE_NUM + address_index]);
+ GNUNET_free_non_null(agent->E[RIL_ACTION_TYPE_NUM + address_index]);
ril_cut_from_vector ((void **) &agent->W, sizeof(double *), RIL_ACTION_TYPE_NUM + address_index,
1, agent->n);
+ ril_cut_from_vector ((void **) &agent->E, sizeof(double *), RIL_ACTION_TYPE_NUM + address_index,
+ 1, agent->n);
//correct last action
if (agent->a_old > (RIL_ACTION_TYPE_NUM + address_index))
{
{
agent->a_old = RIL_ACTION_INVALID;
}
- //decrease old state vector and eligibility vector
- LOG(GNUNET_ERROR_TYPE_DEBUG, "third\n");
+ //decrease old state vector
ril_cut_from_vector ((void **) &agent->s_old, sizeof(double),
- //((s->networks_count * RIL_FEATURES_NETWORK_COUNT)
- ((RIL_FEATURES_NETWORK_COUNT) //TODO! replace when adding more networks
- + (address_index * RIL_FEATURES_ADDRESS_COUNT)), RIL_FEATURES_ADDRESS_COUNT, agent->m);
- ril_cut_from_vector ((void **) &agent->e, sizeof(double),
- //((s->networks_count * RIL_FEATURES_NETWORK_COUNT)
- ((RIL_FEATURES_NETWORK_COUNT) //TODO! replace when adding more networks
- + (address_index * RIL_FEATURES_ADDRESS_COUNT)), RIL_FEATURES_ADDRESS_COUNT, agent->m);
+ address_index * ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1)),
+ ((s->parameters.rbf_divisor+1) * (s->parameters.rbf_divisor+1)), agent->m);
agent->m = m_new;
agent->n = n_new;
- if (address_was_used)
+ if (agent->address_inuse == address)
{
if (NULL != agent->addresses_head) //if peer has an address left, use it
{
- envi_set_active_suggestion (s, agent, agent->addresses_head->address_naked, MIN_BW, MIN_BW,
- GNUNET_NO);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Active address died, suggesting alternative!\n");
+ envi_set_active_suggestion (s,
+ agent,
+ agent->addresses_head->address_naked,
+ agent->bw_in,
+ agent->bw_out,
+ GNUNET_YES);
}
else
{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Active address died, suggesting disconnect!\n");
envi_set_active_suggestion (s, agent, NULL, 0, 0, GNUNET_NO);
}
}
-
ril_step (solver);
+ if (agent->suggestion_address == address)
+ {
+ agent->suggestion_issue = GNUNET_NO;
+ agent->suggestion_address = NULL;
+ }
+ GNUNET_assert (agent->address_inuse != address);
}
+
/**
* Update the properties of an address in the solver
*
* @param solver solver handle
* @param address the address
- * @param type the ATSI type in HBO
- * @param abs_value the absolute value of the property
- * @param rel_value the normalized value
*/
-void
+static void
GAS_ril_address_property_changed (void *solver,
- struct ATS_Address *address,
- uint32_t type,
- uint32_t abs_value,
- double rel_value)
-{
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "API_address_property_changed() Property '%s' for peer '%s' address %s changed "
- "to %.2f \n", GNUNET_ATS_print_property_type (type), GNUNET_i2s (&address->peer),
- address->addr, rel_value);
-
- ril_step (solver);
-}
-
-/**
- * Update the session of an address in the solver
- *
- * NOTE: values in addresses are already updated
- *
- * @param solver solver handle
- * @param address the address
- * @param cur_session the current session
- * @param new_session the new session
- */
-void
-GAS_ril_address_session_changed (void *solver,
- struct ATS_Address *address,
- uint32_t cur_session,
- uint32_t new_session)
+ struct ATS_Address *address)
{
- /*
- * TODO? Future Work: Potentially add session activity as a feature in state vector
- */
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_address_session_changed()\n");
-}
+ struct GAS_RIL_Handle *s = solver;
-/**
- * Notify the solver that an address is (not) actively used by transport
- * to communicate with a remote peer
- *
- * NOTE: values in addresses are already updated
- *
- * @param solver solver handle
- * @param address the address
- * @param in_use usage state
- */
-void
-GAS_ril_address_inuse_changed (void *solver, struct ATS_Address *address, int in_use)
-{
- /*
- * TODO? Future Work: Potentially add usage variable to state vector
- */
LOG(GNUNET_ERROR_TYPE_DEBUG,
- "API_address_inuse_changed() Usage for %s address of peer '%s' changed to %s\n",
- address->plugin, GNUNET_i2s (&address->peer), (GNUNET_YES == in_use) ? "USED" : "UNUSED");
+ "Properties for peer '%s' address changed\n",
+ GNUNET_i2s (&address->peer));
+ s->parameters.temperature = s->parameters.temperature_init;
+ s->parameters.epsilon = s->parameters.epsilon_init;
+ ril_step (s);
}
-/**
- * Notify solver that the network an address is located in has changed
- *
- * NOTE: values in addresses are already updated
- *
- * @param solver solver handle
- * @param address the address
- * @param current_network the current network
- * @param new_network the new network
- */
-void
-GAS_ril_address_change_network (void *solver,
- struct ATS_Address *address,
- uint32_t current_network,
- uint32_t new_network)
-{
- struct GAS_RIL_Handle *s = solver;
- struct RIL_Peer_Agent *agent;
-
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_address_change_network() Network type changed, moving "
- "%s address of peer %s from '%s' to '%s'\n",
- (GNUNET_YES == address->active) ? "active" : "inactive", GNUNET_i2s (&address->peer),
- GNUNET_ATS_print_network_type (current_network), GNUNET_ATS_print_network_type (new_network));
-
- if (address->active && !ril_network_is_active (solver, new_network))
- {
- GAS_ril_address_delete (solver, address, GNUNET_NO);
- return;
- }
-
- agent = ril_get_agent (s, &address->peer, GNUNET_NO);
- if (NULL == agent)
- {
- GNUNET_assert(!ril_network_is_active (solver, current_network));
-
- GAS_ril_address_add (s, address, new_network);
- return;
- }
-
- address->solver_information = ril_get_network(solver, new_network);
-}
/**
* Give feedback about the current assignment
* @param kind the kind to change the preference
* @param score the score
*/
-void
+static void
GAS_ril_address_preference_feedback (void *solver,
- void *application,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_TIME_Relative scope,
- enum GNUNET_ATS_PreferenceKind kind,
- double score)
+ struct GNUNET_SERVICE_Client *application,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TIME_Relative scope,
+ enum GNUNET_ATS_PreferenceKind kind,
+ double score)
{
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "API_address_preference_feedback() Peer '%s' got a feedback of %+.3f from application %s for "
- "preference %s for %d seconds\n", GNUNET_i2s (peer), "UNKNOWN",
- GNUNET_ATS_print_preference_type (kind), scope.rel_value_us / 1000000);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "API_address_preference_feedback() Peer '%s' got a feedback of %+.3f from application %s for "
+ "preference %s for %d seconds\n",
+ GNUNET_i2s (peer),
+ "UNKNOWN",
+ GNUNET_ATS_print_preference_type (kind),
+ scope.rel_value_us / 1000000);
}
+
/**
* Start a bulk operation
*
* @param solver the solver
*/
-void
+static void
GAS_ril_bulk_start (void *solver)
{
struct GAS_RIL_Handle *s = solver;
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_bulk_start() lock: %d\n", s->bulk_lock+1);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "API_bulk_start() lock: %d\n", s->bulk_lock+1);
s->bulk_lock++;
}
+
/**
* Bulk operation done
*
* @param solver the solver handle
*/
-void
+static void
GAS_ril_bulk_stop (void *solver)
{
struct GAS_RIL_Handle *s = solver;
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_bulk_stop() lock: %d\n", s->bulk_lock-1);
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "API_bulk_stop() lock: %d\n",
+ s->bulk_lock - 1);
if (s->bulk_lock < 1)
{
}
}
+
/**
* Tell solver to notify ATS if the address to use changes for a specific
* peer using the bandwidth changed callback
* @param solver the solver handle
* @param peer the identity of the peer
*/
-const struct ATS_Address *
-GAS_ril_get_preferred_address (void *solver, const struct GNUNET_PeerIdentity *peer)
+static void
+GAS_ril_get_preferred_address (void *solver,
+ const struct GNUNET_PeerIdentity *peer)
{
- /*
- * activate agent, return currently chosen address
- */
struct GAS_RIL_Handle *s = solver;
struct RIL_Peer_Agent *agent;
LOG(GNUNET_ERROR_TYPE_DEBUG,
"API_get_preferred_address() Activated agent for peer '%s', but no address available\n",
GNUNET_i2s (peer));
+ s->parameters.temperature = s->parameters.temperature_init;
+ s->parameters.epsilon = s->parameters.epsilon_init;
}
-
- return agent->address_inuse;
+ if (NULL != agent->address_inuse)
+ s->env->bandwidth_changed_cb (s->env->cls,
+ agent->address_inuse);
}
+
/**
* Tell solver stop notifying ATS about changes for this peers
*
* @param solver the solver handle
* @param peer the peer
*/
-void
-GAS_ril_stop_get_preferred_address (void *solver, const struct GNUNET_PeerIdentity *peer)
+static void
+GAS_ril_stop_get_preferred_address (void *solver,
+ const struct GNUNET_PeerIdentity *peer)
{
struct GAS_RIL_Handle *s = solver;
struct RIL_Peer_Agent *agent;
- LOG(GNUNET_ERROR_TYPE_DEBUG, "API_stop_get_preferred_address()");
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "API_stop_get_preferred_address()");
agent = ril_get_agent (s, peer, GNUNET_NO);
return;
}
+ s->parameters.temperature = s->parameters.temperature_init;
+ s->parameters.epsilon = s->parameters.epsilon_init;
+
agent->is_active = GNUNET_NO;
envi_set_active_suggestion (s, agent, agent->address_inuse, agent->bw_in, agent->bw_out,
ril_step (s);
LOG(GNUNET_ERROR_TYPE_DEBUG,
- "API_stop_get_preferred_address() Paused agent for peer '%s' with %s address\n",
- GNUNET_i2s (peer), agent->address_inuse->plugin);
+ "API_stop_get_preferred_address() Paused agent for peer '%s'\n",
+ GNUNET_i2s (peer));
}
+
+/**
+ * Entry point for the plugin
+ *
+ * @param cls pointer to the 'struct GNUNET_ATS_PluginEnvironment'
+ */
+void *
+libgnunet_plugin_ats_ril_init (void *cls)
+{
+ static struct GNUNET_ATS_SolverFunctions sf;
+ struct GNUNET_ATS_PluginEnvironment *env = cls;
+ struct GAS_RIL_Handle *solver = GNUNET_new (struct GAS_RIL_Handle);
+ struct RIL_Scope * cur;
+ int c;
+ char *string;
+ float f_tmp;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "API_init() Initializing RIL solver\n");
+
+ GNUNET_assert (NULL != env);
+ GNUNET_assert (NULL != env->cfg);
+ GNUNET_assert (NULL != env->stats);
+ GNUNET_assert (NULL != env->bandwidth_changed_cb);
+ GNUNET_assert (NULL != env->get_preferences);
+
+ if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number(env->cfg, "ats", "RIL_RBF_DIVISOR", &solver->parameters.rbf_divisor))
+ {
+ solver->parameters.rbf_divisor = RIL_DEFAULT_RBF_DIVISOR;
+ }
+
+ if (GNUNET_OK
+ != GNUNET_CONFIGURATION_get_value_time (env->cfg, "ats", "RIL_STEP_TIME_MIN",
+ &solver->parameters.step_time_min))
+ {
+ solver->parameters.step_time_min = RIL_DEFAULT_STEP_TIME_MIN;
+ }
+
+ if (GNUNET_OK
+ != GNUNET_CONFIGURATION_get_value_time (env->cfg, "ats", "RIL_STEP_TIME_MAX",
+ &solver->parameters.step_time_max))
+ {
+ solver->parameters.step_time_max = RIL_DEFAULT_STEP_TIME_MAX;
+ }
+
+ if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_ALGORITHM", &string))
+ {
+ GNUNET_STRINGS_utf8_toupper (string, string);
+ if (0 == strcmp (string, "SARSA"))
+ {
+ solver->parameters.algorithm = RIL_ALGO_SARSA;
+ }
+ if (0 == strcmp (string, "Q-LEARNING"))
+ {
+ solver->parameters.algorithm = RIL_ALGO_Q;
+ }
+
+ GNUNET_free (string);
+ }
+ else
+ {
+ solver->parameters.algorithm = RIL_DEFAULT_ALGORITHM;
+ }
+
+ if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_SELECT", &string))
+ {
+ solver->parameters.select = !strcmp (string, "EGREEDY") ? RIL_SELECT_EGREEDY : RIL_SELECT_SOFTMAX;
+ GNUNET_free (string);
+ }
+ else
+ {
+ solver->parameters.select = RIL_DEFAULT_SELECT;
+ }
+
+
+ solver->parameters.beta = RIL_DEFAULT_DISCOUNT_BETA;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_DISCOUNT_BETA", &f_tmp))
+ {
+ if (f_tmp < 0.0)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_DISCOUNT_BETA", f_tmp);
+ }
+ else
+ {
+ solver->parameters.beta = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_DISCOUNT_BETA", f_tmp);
+ }
+ }
+
+ solver->parameters.gamma = RIL_DEFAULT_DISCOUNT_GAMMA;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_DISCOUNT_GAMMA", &f_tmp))
+ {
+ if ((f_tmp < 0.0) || (f_tmp > 1.0))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_DISCOUNT_GAMMA", f_tmp);
+ }
+ else
+ {
+ solver->parameters.gamma = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_DISCOUNT_GAMMA", f_tmp);
+ }
+ }
+
+ solver->parameters.alpha = RIL_DEFAULT_GRADIENT_STEP_SIZE;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_GRADIENT_STEP_SIZE", &f_tmp))
+ {
+ if ((f_tmp < 0.0) || (f_tmp > 1.0))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_GRADIENT_STEP_SIZE", f_tmp);
+ }
+ else
+ {
+ solver->parameters.alpha = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_GRADIENT_STEP_SIZE", f_tmp);
+ }
+ }
+
+ solver->parameters.lambda = RIL_DEFAULT_TRACE_DECAY;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_TRACE_DECAY", &f_tmp))
+ {
+ if ((f_tmp < 0.0) || (f_tmp > 1.0))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_TRACE_DECAY", f_tmp);
+ }
+ else
+ {
+ solver->parameters.lambda = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_TRACE_DECAY", f_tmp);
+ }
+ }
+
+ solver->parameters.epsilon_init = RIL_DEFAULT_EXPLORE_RATIO;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_EXPLORE_RATIO", &f_tmp))
+ {
+ if ((f_tmp < 0.0) || (f_tmp > 1.0))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_EXPLORE_RATIO", f_tmp);
+ }
+ else
+ {
+ solver->parameters.epsilon_init = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_EXPLORE_RATIO", f_tmp);
+ }
+ }
+
+ solver->parameters.epsilon_decay = RIL_DEFAULT_EXPLORE_DECAY;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_EXPLORE_DECAY", &f_tmp))
+ {
+ if ((f_tmp < 0.0) || (f_tmp > 1.0))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_EXPLORE_DECAY", f_tmp);
+ }
+ else
+ {
+ solver->parameters.epsilon_decay = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_EXPLORE_DECAY", f_tmp);
+ }
+ }
+
+ solver->parameters.temperature_init = RIL_DEFAULT_TEMPERATURE;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_TEMPERATURE", &f_tmp))
+ {
+ if (f_tmp <= 0.0)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_TEMPERATURE", f_tmp);
+ }
+ else
+ {
+ solver->parameters.temperature_init = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_TEMPERATURE", f_tmp);
+ }
+ }
+
+ solver->parameters.temperature_decay = RIL_DEFAULT_TEMPERATURE_DECAY;
+ if (GNUNET_SYSERR != GNUNET_CONFIGURATION_get_value_float (env->cfg, "ats",
+ "RIL_TEMPERATURE_DECAY", &f_tmp))
+ {
+ if ((f_tmp <= 0.0) || solver->parameters.temperature_decay > 1)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid %s configuration %f \n"),
+ "RIL_TEMPERATURE_DECAY", f_tmp);
+ }
+ else
+ {
+ solver->parameters.temperature_decay = f_tmp;
+ LOG (GNUNET_ERROR_TYPE_INFO, "Using %s of %.3f\n",
+ "RIL_TEMPERATURE_DECAY", f_tmp);
+ }
+ }
+
+ if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (env->cfg, "ats", "RIL_SIMULATE", &solver->simulate))
+ {
+ solver->simulate = GNUNET_NO;
+ }
+
+ if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno(env->cfg, "ats", "RIL_REPLACE_TRACES"))
+ {
+ solver->parameters.eligibility_trace_mode = RIL_E_REPLACE;
+ }
+ else
+ {
+ solver->parameters.eligibility_trace_mode = RIL_E_ACCUMULATE;
+ }
+
+ if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (env->cfg, "ats", "RIL_SOCIAL_WELFARE", &string))
+ {
+ solver->parameters.social_welfare = !strcmp (string, "NASH") ? RIL_WELFARE_NASH : RIL_WELFARE_EGALITARIAN;
+ GNUNET_free (string);
+ }
+ else
+ {
+ solver->parameters.social_welfare = RIL_DEFAULT_WELFARE;
+ }
+
+ solver->env = env;
+ sf.cls = solver;
+ sf.s_add = &GAS_ril_address_add;
+ sf.s_address_update_property = &GAS_ril_address_property_changed;
+ sf.s_get = &GAS_ril_get_preferred_address;
+ sf.s_get_stop = &GAS_ril_stop_get_preferred_address;
+ sf.s_pref = &GAS_ril_address_change_preference;
+ sf.s_feedback = &GAS_ril_address_preference_feedback;
+ sf.s_del = &GAS_ril_address_delete;
+ sf.s_bulk_start = &GAS_ril_bulk_start;
+ sf.s_bulk_stop = &GAS_ril_bulk_stop;
+
+ solver->networks_count = env->network_count;
+ solver->network_entries = GNUNET_malloc (env->network_count * sizeof (struct RIL_Scope));
+ solver->step_count = 0;
+ solver->done = GNUNET_NO;
+
+ for (c = 0; c < env->network_count; c++)
+ {
+ cur = &solver->network_entries[c];
+ cur->type = c;
+ cur->bw_in_available = env->in_quota[c];
+ cur->bw_out_available = env->out_quota[c];
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "init() Quotas for %s network: IN %llu - OUT %llu\n",
+ GNUNET_NT_to_string(cur->type),
+ cur->bw_in_available/1024,
+ cur->bw_out_available/1024);
+ }
+
+ LOG(GNUNET_ERROR_TYPE_DEBUG, "init() Parameters:\n");
+ LOG(GNUNET_ERROR_TYPE_DEBUG, "init() Algorithm = %s, alpha = %f, beta = %f, lambda = %f\n",
+ solver->parameters.algorithm ? "Q" : "SARSA",
+ solver->parameters.alpha,
+ solver->parameters.beta,
+ solver->parameters.lambda);
+ LOG(GNUNET_ERROR_TYPE_DEBUG, "init() exploration_ratio = %f, temperature = %f, ActionSelection = %s\n",
+ solver->parameters.epsilon,
+ solver->parameters.temperature,
+ solver->parameters.select ? "EGREEDY" : "SOFTMAX");
+ LOG(GNUNET_ERROR_TYPE_DEBUG, "init() RBF_DIVISOR = %llu\n",
+ solver->parameters.rbf_divisor);
+
+ return &sf;
+}
+
+
+/**
+ * Exit point for the plugin
+ *
+ * @param cls the solver handle
+ */
+void *
+libgnunet_plugin_ats_ril_done (void *cls)
+{
+ struct GNUNET_ATS_SolverFunctions *sf = cls;
+ struct GAS_RIL_Handle *s = sf->cls;
+ struct RIL_Peer_Agent *cur_agent;
+ struct RIL_Peer_Agent *next_agent;
+
+ LOG(GNUNET_ERROR_TYPE_DEBUG, "API_done() Shutting down RIL solver\n");
+
+ s->done = GNUNET_YES;
+
+ cur_agent = s->agents_head;
+ while (NULL != cur_agent)
+ {
+ next_agent = cur_agent->next;
+ GNUNET_CONTAINER_DLL_remove(s->agents_head, s->agents_tail, cur_agent);
+ agent_die (s, cur_agent);
+ cur_agent = next_agent;
+ }
+
+ if (NULL != s->step_next_task_id)
+ {
+ GNUNET_SCHEDULER_cancel (s->step_next_task_id);
+ }
+ GNUNET_free(s->network_entries);
+ GNUNET_free(s);
+
+ return NULL;
+}
+
+
/* end of plugin_ats_ril.c */
projects / oweals / gnunet.git / blobdiff