/*
This file is part of GNUnet.
- (C) 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2011-2015 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 Christian Grothoff
*/
#include "platform.h"
+#include <float.h>
#include "gnunet_ats_service.h"
#include "gnunet-service-ats_addresses.h"
#include "gnunet-service-ats_normalization.h"
+#include "gnunet-service-ats_plugins.h"
#define LOG(kind,...) GNUNET_log_from (kind, "ats-normalization",__VA_ARGS__)
-/**
- * Preference client
- */
-struct PreferenceClient
-{
- /**
- * Next in DLL
- */
- struct PreferenceClient *prev;
-
- /**
- * Next in DLL
- */
-
- struct PreferenceClient *next;
-
- /**
- * Client handle
- */
- void *client;
-
- /**
- * Array of sum of absolute preferences for this client
- */
- double f_abs_sum[GNUNET_ATS_PreferenceCount];
-
- /**
- * Array of sum of relative preferences for this client
- */
- double f_rel_sum[GNUNET_ATS_PreferenceCount];
-
- /**
- * List of peer preferences for this client
- */
-
- /**
- * Head of peer list
- */
- struct PreferencePeer *p_head;
-
- /**
- * Tail of peer list
- */
- struct PreferencePeer *p_tail;
-};
-
-/**
- * Preference peer
- */
-struct PreferencePeer
-{
- /**
- * Next in DLL
- */
- struct PreferencePeer *next;
-
- /**
- * Previous in DLL
- */
- struct PreferencePeer *prev;
-
- /**
- * Client
- */
- struct PreferenceClient *client;
-
- /**
- * Peer id
- */
- struct GNUNET_PeerIdentity id;
-
- /**
- * Absolute preference values for all preference types
- */
- double f_abs[GNUNET_ATS_PreferenceCount];
-
- /**
- * Relative preference values for all preference types
- */
- double f_rel[GNUNET_ATS_PreferenceCount];
-
- /**
- * Absolute point of time of next aging process
- */
- struct GNUNET_TIME_Absolute next_aging[GNUNET_ATS_PreferenceCount];
-};
/**
- * Relative preferences for a peer
+ * Range information for normalization of quality properties.
*/
-struct PeerRelative
+struct PropertyRange
{
/**
- * Relative preference values
+ * Minimum value we see for this property across all addresses.
*/
- double f_rel[GNUNET_ATS_PreferenceCount];
+ struct GNUNET_ATS_Properties min;
/**
- * Peer id
+ * Maximum value we see for this property across all addresses.
*/
- struct GNUNET_PeerIdentity id;
-};
-
-/**
- * Quality Normalization
- */
-struct Property
-{
- uint32_t prop_type;
- uint32_t atsi_type;
- uint32_t min;
- uint32_t max;
+ struct GNUNET_ATS_Properties max;
};
-struct Property properties[GNUNET_ATS_QualityPropertiesCount];
-
-
-/**
- * Callback to call on changing preference values
- */
-static GAS_Normalization_preference_changed_cb pref_changed_cb;
/**
- * Closure for callback to call on changing preference values
+ * Range information for all quality properties we see.
*/
-static void *pref_changed_cb_cls;
+static struct PropertyRange property_range;
-/**
- * Callback to call on changing property values
- */
-GAS_Normalization_property_changed_cb prop_ch_cb;
/**
- * Closure for callback to call on changing property values
- */
-void *prop_ch_cb_cls;
-
-/**
- * Hashmap to store peer information for preference normalization
- */
-static struct GNUNET_CONTAINER_MultiPeerMap *preference_peers;
-
-/**
- * Hashmap to store peer information for property normalization
- * FIXME: this map is not used!
- */
-static struct GNUNET_CONTAINER_MultiPeerMap *property_peers;
-
-/**
- * Clients in DLL: head
- */
-static struct PreferenceClient *pc_head;
-
-/**
- * Clients in DLL: tail
- */
-static struct PreferenceClient *pc_tail;
-
-/**
- * Default values
- */
-static struct PeerRelative defvalues;
-
-static struct GNUNET_SCHEDULER_Task * aging_task;
-
-/**
- * Application Preference Normalization
- */
-
-/**
- * Update a peer
+ * Add the value from @a atsi to the running average of the
+ * given @a ni quality property.
*
- * @param id peer id
- * @param kind the kind
- * @param rp the relative peer struct
- * @return the new relative preference
+ * @param current_val the updated value
+ * @param ni normalization information to update
*/
static void
-update_relative_values_for_peer (const struct GNUNET_PeerIdentity *id,
- enum GNUNET_ATS_PreferenceKind kind, struct PeerRelative *rp)
+update_avg (uint64_t current_val,
+ struct GAS_NormalizationInfo *ni)
{
- struct PreferenceClient *c_cur;
- struct PreferencePeer *p_cur;
- double f_rel_total;
- double f_rel_sum;
- double backup;
- unsigned int peer_count;
-
- f_rel_sum = 0.0;
- f_rel_total = 0.0;
- peer_count = 0;
-
- /* For all clients */
- for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
- {
- /* For peer entries with this id */
- for (p_cur = c_cur->p_head; NULL != p_cur; p_cur = p_cur->next)
- {
- f_rel_sum += p_cur->f_rel[kind];
- if (0 == memcmp (id, &p_cur->id, sizeof(struct GNUNET_PeerIdentity)))
- {
- peer_count ++;
- f_rel_total += p_cur->f_rel[kind];
- }
-
- }
- }
+ double sum;
+ uint32_t count;
+ unsigned int c1;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%u clients have a total relative preference for peer `%s' `%s' of %.3f and for %s in total %.3f\n",
- peer_count, GNUNET_i2s (id),
- GNUNET_ATS_print_preference_type (kind),
- f_rel_total,
- GNUNET_ATS_print_preference_type (kind),
- f_rel_sum);
-
- /* Find entry for the peer containing relative values in the hashmap */
- if (NULL != rp)
+ ni->atsi_abs[ni->avg_queue_index++] = current_val;
+ if (GAS_normalization_queue_length == ni->avg_queue_index)
+ ni->avg_queue_index = 0;
+ count = 0;
+ sum = 0.0;
+ for (c1 = 0; c1 < GAS_normalization_queue_length; c1++)
{
- backup = rp->f_rel[kind];
- if (f_rel_sum > 0)
- rp->f_rel[kind] = f_rel_total / f_rel_sum;
- else
- {
- /* No client had any preferences for this type and any peer */
- rp->f_rel[kind] = DEFAULT_REL_PREFERENCE;
- }
- if ((backup != rp->f_rel[kind]) && (NULL != pref_changed_cb))
+ if (UINT64_MAX != ni->atsi_abs[c1])
{
- pref_changed_cb (pref_changed_cb_cls, &rp->id, kind, rp->f_rel[kind]);
+ count++;
+ sum += (double) ni->atsi_abs[c1];
}
}
+ if (0 == count)
+ ni->avg = current_val; /* must be UINT64_MAX */
+ else
+ ni->avg = sum / count;
}
-/**
- * Recalculate preference for a specific ATS property
- *
- * @param c the preference client
- * @param kind the preference kind
- * @return the result
- */
-static void
-recalculate_relative_preferences (struct PreferenceClient *c, enum GNUNET_ATS_PreferenceKind kind)
-{
- struct PreferencePeer *p_cur;
-
- /* For this client: sum of absolute preference values for this preference */
- c->f_abs_sum[kind] = 0.0;
- /* For this client: sum of relative preference values for this preference
- *
- * Note: this value should also be 1.0, but:
- * if no preferences exist due to aging, this value can be 0.0
- * and the client can be removed */
- c->f_rel_sum[kind] = 0.0;
-
- for (p_cur = c->p_head; NULL != p_cur; p_cur = p_cur->next)
- c->f_abs_sum[kind] += p_cur->f_abs[kind];
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Client %p has sum of total preferences for %s of %.3f\n",
- c->client, GNUNET_ATS_print_preference_type (kind), c->f_abs_sum[kind]);
-
- /* For all peers: calculate relative preference */
- for (p_cur = c->p_head; NULL != p_cur; p_cur = p_cur->next)
- {
- /* Calculate relative preference for specific kind */
-
- /* Every application has a preference for each peer between
- * [0 .. 1] in relative values
- * and [0 .. inf] in absolute values */
- p_cur->f_rel[kind] = p_cur->f_abs[kind] / c->f_abs_sum[kind];
- c->f_rel_sum[kind] += p_cur->f_rel[kind];
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Client %p has relative preference for %s for peer `%s' of %.3f\n",
- c->client,
- GNUNET_ATS_print_preference_type (kind),
- GNUNET_i2s (&p_cur->id),
- p_cur->f_rel[kind]);
- }
-
-}
/**
- * Update the absolute preference value for a peer
- * @param c the client
- * @param p the peer
- * @param kind the preference kind
- * @param score_abs the absolute value
- * @return the new relative preference value
+ * Function called for all addresses and peers to find the minimum and
+ * maximum (averaged) values for a given quality property. Given
+ * those, we can then calculate the normalized score.
+ *
+ * @param cls the `struct PropertyRange`
+ * @param h which peer are we looking at (ignored)
+ * @param k the address for that peer
+ * @return #GNUNET_OK (continue to iterate)
*/
-static void
-update_abs_preference (struct PreferenceClient *c, struct PreferencePeer *p,
- enum GNUNET_ATS_PreferenceKind kind, float score_abs)
-{
- double score = score_abs;
-
- /* Update preference value according to type */
- switch (kind)
- {
- case GNUNET_ATS_PREFERENCE_BANDWIDTH:
- case GNUNET_ATS_PREFERENCE_LATENCY:
- p->f_abs[kind] = score;
- /* p->f_abs[kind] = (p->f_abs[kind] + score) / 2; */
- p->next_aging[kind] = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
- PREF_AGING_INTERVAL);
- break;
- case GNUNET_ATS_PREFERENCE_END:
- break;
- default:
- break;
- }
-}
-
-static int update_iterator (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value)
+static int
+find_min_max_it (void *cls,
+ const struct GNUNET_PeerIdentity *h,
+ void *k)
{
- enum GNUNET_ATS_PreferenceKind *kind = cls;
- update_relative_values_for_peer (key, (*kind), (struct PeerRelative *) value);
+ struct PropertyRange *pr = cls;
+ const struct ATS_Address *a = k;
+
+ pr->max.utilization_out = GNUNET_MAX (pr->max.utilization_out,
+ a->properties.utilization_out);
+ pr->max.utilization_in = GNUNET_MAX (pr->max.utilization_in,
+ a->properties.utilization_in);
+ pr->max.distance = GNUNET_MAX (pr->max.distance,
+ a->properties.distance);
+ pr->max.delay = GNUNET_TIME_relative_max (pr->max.delay,
+ a->properties.delay);
+ pr->min.utilization_out = GNUNET_MIN (pr->min.utilization_out,
+ a->properties.utilization_out);
+ pr->min.utilization_in = GNUNET_MIN (pr->min.utilization_in,
+ a->properties.utilization_in);
+ pr->min.distance = GNUNET_MIN (pr->min.distance,
+ a->properties.distance);
+ pr->min.delay = GNUNET_TIME_relative_min (pr->min.delay,
+ a->properties.delay);
return GNUNET_OK;
}
-static void
-run_preference_update (struct PreferenceClient *c_cur,
- struct PreferencePeer *p_cur,enum GNUNET_ATS_PreferenceKind kind,
- float score_abs)
-{
- double old_value;
-
- /* Update relative value */
- old_value = p_cur->f_rel[kind];
- recalculate_relative_preferences (c_cur, kind);
- if (p_cur->f_rel[kind] == old_value)
- return;
-
- /* Relative preference value changed, recalculate for all peers */
- GNUNET_CONTAINER_multipeermap_iterate (preference_peers, &update_iterator, &kind);
-}
/**
- * Reduce absolute preferences since they got old
+ * Compute the normalized value from the given @a ni range
+ * data and the average value.
*
- * @param cls the PreferencePeer
- * @param tc context
+ * @param min minimum value
+ * @param max maximum value
+ * @param ni normalization information to update
*/
static void
-preference_aging (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+update_norm (uint64_t min,
+ uint64_t max,
+ struct GAS_NormalizationInfo *ni)
{
- struct PreferencePeer *p;
- struct PreferenceClient *cur_client;
- int i;
- int values_to_update;
- double backup;
-
- aging_task = NULL;
- values_to_update = 0;
- cur_client = NULL;
-
- for (cur_client = pc_head; NULL != cur_client; cur_client = cur_client->next)
- {
- for (p = cur_client->p_head; NULL != p; p = p->next)
- {
- /* Aging absolute values: */
- for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
- {
- if (0
- == GNUNET_TIME_absolute_get_remaining (p->next_aging[i]).rel_value_us)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Aging preference for peer `%s'\n", GNUNET_i2s (&p->id));
- backup = p->f_abs[i];
- if (p->f_abs[i] > DEFAULT_ABS_PREFERENCE)
- p->f_abs[i] *= PREF_AGING_FACTOR;
-
- if (p->f_abs[i] <= DEFAULT_ABS_PREFERENCE + PREF_EPSILON)
- p->f_abs[i] = DEFAULT_ABS_PREFERENCE;
-
- if ( (p->f_abs[i] != DEFAULT_ABS_PREFERENCE) &&
- (backup != p->f_abs[i]) )
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Aged preference for peer `%s' from %.3f to %.3f\n",
- GNUNET_i2s (&p->id), backup, p->f_abs[i]);
-
- run_preference_update(cur_client, p, i, p->f_abs[i]);
-
- p->next_aging[i] = GNUNET_TIME_absolute_add (
- GNUNET_TIME_absolute_get (), PREF_AGING_INTERVAL);
- values_to_update++;
- }
- }
- }
- }
- }
-
- if (values_to_update > 0)
- {
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Rescheduling aging task due to %u elements to age\n",
- values_to_update);
- aging_task = GNUNET_SCHEDULER_add_delayed (PREF_AGING_INTERVAL,
- &preference_aging, NULL );
- }
+ /* max - 2 * min + avg_value / (max - min) */
+ if (min < max)
+ ni->norm = DEFAULT_REL_QUALITY + (ni->avg - min) / (double) (max - min);
else
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "No values to age left, not rescheduling aging task\n");
-
+ ni->norm = DEFAULT_REL_QUALITY;
}
-/**
- * Normalize an updated preference value
- *
- * @param client the client with this preference
- * @param peer the peer to change the preference for
- * @param kind the kind to change the preference
- * @param score_abs the normalized score
- */
-void
-GAS_normalization_normalize_preference (void *client,
- const struct GNUNET_PeerIdentity *peer,
- enum GNUNET_ATS_PreferenceKind kind,
- float score_abs)
-{
- struct PreferenceClient *c_cur;
- struct PreferencePeer *p_cur;
- struct PeerRelative *r_cur;
- double old_value;
- int i;
-
- GNUNET_assert(NULL != client);
- GNUNET_assert(NULL != peer);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Client %p changes preference for peer `%s' for `%s' to %.2f\n",
- client,
- GNUNET_i2s (peer),
- GNUNET_ATS_print_preference_type (kind),
- score_abs);
-
- if (kind >= GNUNET_ATS_PreferenceCount)
- {
- GNUNET_break(0);
- return;
- }
-
- /* Find preference client */
- for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
- {
- if (client == c_cur->client)
- break;
- }
- /* Not found: create new preference client */
- if (NULL == c_cur)
- {
- c_cur = GNUNET_new (struct PreferenceClient);
- c_cur->client = client;
- for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
- {
- c_cur->f_abs_sum[i] = DEFAULT_ABS_PREFERENCE;
- c_cur->f_rel_sum[i] = DEFAULT_REL_PREFERENCE;
- }
-
- GNUNET_CONTAINER_DLL_insert(pc_head, pc_tail, c_cur);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Adding new client %p \n", c_cur);
- }
-
- /* Find entry for peer */
- for (p_cur = c_cur->p_head; NULL != p_cur; p_cur = p_cur->next)
- if (0 == memcmp (&p_cur->id, peer, sizeof(p_cur->id)))
- break;
-
- /* Not found: create new peer entry */
- if (NULL == p_cur)
- {
- p_cur = GNUNET_new (struct PreferencePeer);
- p_cur->client = c_cur;
- p_cur->id = (*peer);
- for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
- {
- /* Default value per peer absolute preference for a preference: 0 */
- p_cur->f_abs[i] = DEFAULT_ABS_PREFERENCE;
- /* Default value per peer relative preference for a quality: 1.0 */
- p_cur->f_rel[i] = DEFAULT_REL_PREFERENCE;
- p_cur->next_aging[i] = GNUNET_TIME_UNIT_FOREVER_ABS;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Adding new peer %p for client %p \n",
- p_cur, c_cur);
- GNUNET_CONTAINER_DLL_insert(c_cur->p_head, c_cur->p_tail, p_cur);
- }
-
- /* Create struct for peer */
- if (NULL == GNUNET_CONTAINER_multipeermap_get (preference_peers, peer))
- {
- r_cur = GNUNET_new (struct PeerRelative);
- r_cur->id = (*peer);
- for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
- r_cur->f_rel[i] = DEFAULT_REL_PREFERENCE;
- GNUNET_assert(
- GNUNET_OK == GNUNET_CONTAINER_multipeermap_put (preference_peers,
- &r_cur->id, r_cur, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
- }
-
- /* Update absolute value */
- old_value = p_cur->f_abs[kind];
- update_abs_preference (c_cur, p_cur, kind, score_abs);
- if (p_cur->f_abs[kind] == old_value)
- return;
-
- run_preference_update (c_cur, p_cur, kind, score_abs);
-
- /* Start aging task */
- if (NULL == aging_task)
- aging_task = GNUNET_SCHEDULER_add_delayed (PREF_AGING_INTERVAL,
- &preference_aging, NULL );
-
-}
/**
- * Get the normalized preference values for a specific peer or
- * the default values if
+ * Normalize the property value for a given address based
+ * on the range we know that property values have globally.
*
- * @param id the peer
- * @return pointer to the values, can be indexed with GNUNET_ATS_PreferenceKind,
- * default preferences if peer does not exist
+ * @param cls NULL
+ * @param key which peer are we looking at (ignored)
+ * @param value the address for that peer, from where we get
+ * the original value and where we write the
+ * normalized value
+ * @return #GNUNET_OK (continue to iterate)
*/
-const double *
-GAS_normalization_get_preferences_by_peer (const struct GNUNET_PeerIdentity *id)
+static int
+normalize_address (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- GNUNET_assert(NULL != preference_peers);
- GNUNET_assert(NULL != id);
-
- struct PeerRelative *rp;
- if (NULL == (rp = GNUNET_CONTAINER_multipeermap_get (preference_peers, id)))
- {
- return defvalues.f_rel;
- }
- return rp->f_rel;
+ struct ATS_Address *address = value;
+
+ update_norm (property_range.min.delay.rel_value_us,
+ property_range.max.delay.rel_value_us,
+ &address->norm_delay);
+ update_norm (property_range.min.distance,
+ property_range.max.distance,
+ &address->norm_distance);
+ update_norm (property_range.min.utilization_in,
+ property_range.max.utilization_in,
+ &address->norm_utilization_in);
+ update_norm (property_range.min.utilization_out,
+ property_range.max.utilization_out,
+ &address->norm_utilization_out);
+ return GNUNET_OK;
}
-/**
- * Get the normalized preference values for a specific client and peer
- *
- * @param client client
- * @param peer the peer
- * @param pref the preference type
- * @return the value
- */
-double
-GAS_normalization_get_preferences_by_client (const void *client,
- const struct GNUNET_PeerIdentity *peer,
- enum GNUNET_ATS_PreferenceKind pref)
-{
- struct PreferenceClient *c_cur;
- struct PreferencePeer *p_cur;
-
- /* Find preference client */
- for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
- {
- if (client == c_cur->client)
- break;
- }
- if (NULL == c_cur)
- return -1.0;
-
- for (p_cur = c_cur->p_head; NULL != p_cur; p_cur = p_cur->next)
- {
- if (0 == memcmp (peer, &p_cur->id, sizeof (struct GNUNET_PeerIdentity)))
- break;
- }
- if (NULL == p_cur)
- return DEFAULT_REL_PREFERENCE; /* Not found, return default */
-
- return p_cur->f_rel[pref];
-}
/**
- * Get the normalized properties values for a specific peer or
- * the default values if
+ * Notify about change in normalized property.
*
- * @param address the address
- * @return pointer to the values, can be indexed with GNUNET_ATS_PreferenceKind,
- * default preferences if peer does not exist
+ * @param cls NULL
+ * @param key which peer are we looking at (ignored)
+ * @param value the address for that peer
+ * @return #GNUNET_OK (continue to iterate)
*/
-const double *
-GAS_normalization_get_properties (struct ATS_Address *address)
-{
- static double norm_values[GNUNET_ATS_QualityPropertiesCount];
- int i;
-
- GNUNET_assert(NULL != address);
-
- for (i = 0; i < GNUNET_ATS_QualityPropertiesCount; i++)
- {
- if ((address->atsin[i].norm >= 1.0) && (address->atsin[i].norm <= 2.0))
- norm_values[i] = address->atsin[i].norm;
- else
- norm_values[i] = DEFAULT_REL_QUALITY;
- }
- return norm_values;
-}
-
-/**
- * Normalize a specific ATS type with the values in queue
- * @param address the address
- * @param atsi the ats information
- * @return the new average or GNUNET_ATS_VALUE_UNDEFINED
- */
-
-uint32_t
-property_average (struct ATS_Address *address,
- const struct GNUNET_ATS_Information *atsi)
-{
- struct GAS_NormalizationInfo *ni;
- uint32_t current_type;
- uint32_t current_val;
- uint32_t res;
- uint64_t sum;
- uint32_t count;
- unsigned int c1;
- unsigned int index;
- unsigned int props[] = GNUNET_ATS_QualityProperties;
-
- /* Average the values of this property */
- current_type = ntohl (atsi->type);
- current_val = ntohl (atsi->value);
-
- for (c1 = 0; c1 < GNUNET_ATS_QualityPropertiesCount; c1++)
- {
- if (current_type == props[c1])
- break;
- }
- if (c1 == GNUNET_ATS_QualityPropertiesCount)
- {
- GNUNET_break(0);
- return GNUNET_ATS_VALUE_UNDEFINED;
- }
- index = c1;
-
- ni = &address->atsin[index];
- ni->atsi_abs[ni->avg_queue_index] = current_val;
- ni->avg_queue_index++;
- if (GAS_normalization_queue_length == ni->avg_queue_index)
- ni->avg_queue_index = 0;
-
- count = 0;
- sum = 0;
- for (c1 = 0; c1 < GAS_normalization_queue_length; c1++)
- {
- if (GNUNET_ATS_VALUE_UNDEFINED != ni->atsi_abs[c1])
- {
- count++;
- if (GNUNET_ATS_VALUE_UNDEFINED > (sum + ni->atsi_abs[c1]))
- sum += ni->atsi_abs[c1];
- else
- {
- sum = GNUNET_ATS_VALUE_UNDEFINED - 1;
- GNUNET_break(0);
- }
- }
- }
- GNUNET_assert(0 != count);
- res = sum / count;
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "New average of `%s' created by adding %u from %u elements: %u\n",
- GNUNET_ATS_print_property_type (current_type), current_val, count, res,
- sum);
- ni->avg = res;
- return res;
-}
-
-struct FindMinMaxCtx
-{
- struct Property *p;
- uint32_t min;
- uint32_t max;
-};
-
static int
-find_min_max_it (void *cls, const struct GNUNET_PeerIdentity *h, void *k)
+notify_change (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
{
- struct FindMinMaxCtx *find_res = cls;
- struct ATS_Address *a = k;
-
- if (a->atsin[find_res->p->prop_type].avg > find_res->max)
- find_res->max = a->atsin[find_res->p->prop_type].avg;
-
- if (a->atsin[find_res->p->prop_type].avg < find_res->min)
- find_res->min = a->atsin[find_res->p->prop_type].avg;
+ struct ATS_Address *address = value;
+ GAS_plugin_notify_property_changed (address);
return GNUNET_OK;
}
-static int
-normalize_address (void *cls, const struct GNUNET_PeerIdentity *h, void *k)
-{
- struct Property *p = cls;
- struct ATS_Address *address = k;
- double delta;
- double backup;
- uint32_t avg_value;
-
- backup = address->atsin[p->prop_type].norm;
- avg_value = address->atsin[p->prop_type].avg;
- delta = p->max - p->min;
- /* max - 2 * min + avg_value / max - min */
- if (0 != delta)
- address->atsin[p->prop_type].norm = (delta + (avg_value - p->min)) / (delta);
- else
- address->atsin[p->prop_type].norm = DEFAULT_REL_QUALITY;
-
- if (backup == address->atsin[p->prop_type].norm)
- return GNUNET_OK;
-
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "Normalize `%s' address %p's '%s' with value %u to range [%u..%u] = %.3f\n",
- GNUNET_i2s (&address->peer), address,
- GNUNET_ATS_print_property_type (p->atsi_type),
- address->atsin[p->prop_type].avg, p->min, p->max,
- address->atsin[p->prop_type].norm);
-
- if (NULL != prop_ch_cb)
- prop_ch_cb (prop_ch_cb_cls, address, p->atsi_type,
- address->atsin[p->prop_type].norm);
-
- return GNUNET_OK;
-}
/**
- * Normalize avg_value to a range of values between [1.0, 2.0]
- * based on min max values currently known.
+ * Initialize property range to the values corresponding
+ * to an empty set.
*
- * @param addresses the address hashmap
- * @param p the property
- * @param address the address
- * @param avg_value the value to normalize
+ * @param pr range to initialize
*/
static void
-property_normalize (struct GNUNET_CONTAINER_MultiPeerMap *addresses,
- struct Property *p, struct ATS_Address *address, uint32_t avg_value)
+init_range (struct PropertyRange *pr)
{
- struct FindMinMaxCtx find_ctx;
- int addr_count;
- int limits_changed;
-
- find_ctx.p = p;
- find_ctx.max = 0;
- find_ctx.min = UINT32_MAX;
- addr_count = GNUNET_CONTAINER_multipeermap_iterate (addresses,
- &find_min_max_it, &find_ctx);
- if (0 == addr_count)
- {
- GNUNET_break(0);
- return;
- }
-
- limits_changed = GNUNET_NO;
- if (find_ctx.max != p->max)
- {
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "Normalizing %s: new maximum %u -> recalculate all values\n",
- GNUNET_ATS_print_property_type (p->atsi_type), find_ctx.max);
- p->max = find_ctx.max;
- limits_changed = GNUNET_YES;
- }
-
- if ((find_ctx.min != p->min) && (find_ctx.min < p->max))
- {
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "Normalizing %s: new minimum %u -> recalculate all values\n",
- GNUNET_ATS_print_property_type (p->atsi_type), find_ctx.min,
- find_ctx.max);
- p->min = find_ctx.min;
- limits_changed = GNUNET_YES;
- }
- else if (find_ctx.min == p->max)
- {
- /* Only one value, so minimum has to be 0 */
- p->min = 0;
- }
-
- /* Normalize the values of this property */
- if (GNUNET_NO == limits_changed)
- {
- /* normalize just this address */
- normalize_address (p, &address->peer, address);
- return;
- }
- else
- {
- /* limits changed, normalize all addresses */
- GNUNET_CONTAINER_multipeermap_iterate (addresses, &normalize_address, p);
- return;
- }
+ memset (pr, 0, sizeof (struct PropertyRange));
+ pr->min.utilization_out = UINT32_MAX;
+ pr->min.utilization_in = UINT32_MAX;
+ pr->min.distance = UINT32_MAX;
+ pr->min.delay = GNUNET_TIME_UNIT_FOREVER_REL;
}
+
/**
* Update and normalize atsi performance information
*
- * @param addresses hashmap containing all addresses
* @param address the address to update
- * @param atsi the array of performance information
- * @param atsi_count the number of atsi information in the array
*/
void
-GAS_normalization_normalize_property (
- struct GNUNET_CONTAINER_MultiPeerMap *addresses,
- struct ATS_Address *address, const struct GNUNET_ATS_Information *atsi,
- uint32_t atsi_count)
+GAS_normalization_update_property (struct ATS_Address *address)
{
- struct Property *cur_prop;
- int c1;
- int c2;
- uint32_t current_type;
- uint32_t current_val;
- unsigned int existing_properties[] = GNUNET_ATS_QualityProperties;
-
- GNUNET_assert(NULL != address);
- GNUNET_assert(NULL != atsi);
-
- LOG(GNUNET_ERROR_TYPE_DEBUG, "Updating %u elements for peer `%s'\n",
- atsi_count, GNUNET_i2s (&address->peer));
+ const struct GNUNET_ATS_Properties *prop = &address->properties;
+ struct PropertyRange range;
- for (c1 = 0; c1 < atsi_count; c1++)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Updating properties for peer `%s'\n",
+ GNUNET_i2s (&address->peer));
+ GAS_plugin_solver_lock ();
+ update_avg (prop->delay.rel_value_us,
+ &address->norm_delay);
+ update_avg (prop->distance,
+ &address->norm_distance);
+ update_avg (prop->utilization_in,
+ &address->norm_utilization_in);
+ update_avg (prop->utilization_in,
+ &address->norm_utilization_out);
+
+ init_range (&range);
+ GNUNET_CONTAINER_multipeermap_iterate (GSA_addresses,
+ &find_min_max_it,
+ &range);
+ if (0 != memcmp (&range,
+ &property_range,
+ sizeof (struct PropertyRange)))
{
- current_type = ntohl (atsi[c1].type);
-
- for (c2 = 0; c2 < GNUNET_ATS_QualityPropertiesCount; c2++)
- {
- /* Check if type is valid */
- if (current_type == existing_properties[c2])
- break;
- }
- if (GNUNET_ATS_QualityPropertiesCount == c2)
- {
- /* Invalid property, continue with next element */
- continue;
- }
- /* Averaging */
- current_val = property_average (address, &atsi[c1]);
- if (GNUNET_ATS_VALUE_UNDEFINED == current_val)
- {
- GNUNET_break(0);
- continue;
- }
-
- /* Normalizing */
- /* Check min, max */
- cur_prop = &properties[c2];
- property_normalize (addresses, cur_prop, address, current_val);
+ /* limits changed, (re)normalize all addresses */
+ property_range = range;
+ GNUNET_CONTAINER_multipeermap_iterate (GSA_addresses,
+ &normalize_address,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_iterate (GSA_addresses,
+ ¬ify_change,
+ NULL);
}
-}
-
-static void
-free_client (struct PreferenceClient *pc)
-{
- struct PreferencePeer *next_p;
- struct PreferencePeer *p;
- next_p = pc->p_head;
- while (NULL != (p = next_p))
+ else
{
- next_p = p->next;
- GNUNET_CONTAINER_DLL_remove(pc->p_head, pc->p_tail, p);
- GNUNET_free(p);
+ /* renormalize just this one address */
+ normalize_address (NULL,
+ &address->peer,
+ address);
+ notify_change (NULL,
+ &address->peer,
+ address);
}
- GNUNET_free(pc);
+ GAS_plugin_solver_unlock ();
}
-/**
- * A performance client disconnected
- *
- * @param client the client
- */
-
-void
-GAS_normalization_preference_client_disconnect (void *client)
-{
- struct PreferenceClient *c_cur;
- /* Find preference client */
-
- for (c_cur = pc_head; NULL != c_cur; c_cur = c_cur->next)
- {
- if (client == c_cur->client)
- break;
- }
- if (NULL == c_cur)
- return;
-
- GNUNET_CONTAINER_DLL_remove(pc_head, pc_tail, c_cur);
- free_client (c_cur);
-}
/**
* Start the normalization component
- *
- * @param pref_ch_cb callback to call on relative preference changing
- * @param pref_ch_cb_cls cls for the preference callback
- * @param property_ch_cb callback to call on relative property changing
- * @param property_ch_cb_cls cls for the property callback
*/
void
-GAS_normalization_start (GAS_Normalization_preference_changed_cb pref_ch_cb,
- void *pref_ch_cb_cls, GAS_Normalization_property_changed_cb property_ch_cb,
- void *property_ch_cb_cls)
+GAS_normalization_start ()
{
- int c1;
- int i;
- preference_peers = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
- property_peers = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
- unsigned int existing_properties[] = GNUNET_ATS_QualityProperties;
-
- for (c1 = 0; c1 < GNUNET_ATS_QualityPropertiesCount; c1++)
- {
- properties[c1].prop_type = c1;
- properties[c1].atsi_type = existing_properties[c1];
- properties[c1].min = 0;
- properties[c1].max = 0;
- }
-
- pref_changed_cb = pref_ch_cb;
- pref_changed_cb_cls = pref_ch_cb_cls;
- prop_ch_cb = property_ch_cb;
- prop_ch_cb_cls = pref_ch_cb_cls;
-
- pc_head = NULL;
- pc_tail = NULL;
-
- for (i = 0; i < GNUNET_ATS_PreferenceCount; i++)
- defvalues.f_rel[i] = DEFAULT_REL_PREFERENCE;
- aging_task = NULL;
- return;
+ init_range (&property_range);
}
-/**
- * Free a peer
- *
- * @param cls unused
- * @param key the key
- * @param value RelativePeer
- * @return #GNUNET_OK to continue
- */
-static int
-free_peer (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
-{
- struct PeerRelative *rp = value;
- if (GNUNET_YES
- == GNUNET_CONTAINER_multipeermap_remove (preference_peers, key, value))
- GNUNET_free(rp);
- else
- GNUNET_break(0);
- return GNUNET_OK;
-}
/**
* Stop the normalization component and free all items
void
GAS_normalization_stop ()
{
- struct PreferenceClient *pc;
- struct PreferenceClient *next_pc;
-
- if (NULL != aging_task)
- {
- GNUNET_SCHEDULER_cancel (aging_task);
- aging_task = NULL;
- }
-
- next_pc = pc_head;
- while (NULL != (pc = next_pc))
- {
- next_pc = pc->next;
- GNUNET_CONTAINER_DLL_remove(pc_head, pc_tail, pc);
- free_client (pc);
- }
-
- GNUNET_CONTAINER_multipeermap_iterate (preference_peers, &free_peer, NULL );
- GNUNET_CONTAINER_multipeermap_destroy (preference_peers);
- GNUNET_CONTAINER_multipeermap_destroy (property_peers);
- return;
+ /* nothing to do */
}
+
/* end of gnunet-service-ats_normalization.c */
projects / oweals / gnunet.git / blobdiff