2 This file is part of GNUnet.
3 (C) 2011 Christian Grothoff (and other contributing authors)
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22 * @file ats/gnunet-service-ats_addresses_mlp.h
23 * @brief ats mlp problem solver
24 * @author Matthias Wachs
25 * @author Christian Grothoff
28 #include "gnunet_statistics_service.h"
29 #include "gnunet-service-ats_addresses.h"
34 #ifndef GNUNET_SERVICE_ATS_ADDRESSES_MLP_H
35 #define GNUNET_SERVICE_ATS_ADDRESSES_MLP_H
37 #define DEBUG_MLP GNUNET_EXTRA_LOGGING
39 #define MLP_MAX_EXEC_DURATION GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 3)
40 #define MLP_MAX_ITERATIONS INT_MAX
44 struct ATS_Peer *next;
45 struct ATS_Peer *prev;
47 struct GNUNET_PeerIdentity id;
49 /* Array of quality preferences */
50 double f_q[GNUNET_ATS_QualityPropertiesCount];
51 /* Legacy preference value */
54 /* constraint 2: 1 address per peer*/
57 /* constraint 9: relativity */
60 struct ATS_Address *head;
61 struct ATS_Address *tail;
72 struct GNUNET_STATISTICS_Handle *stats;
75 * GLPK (MLP) problem object
86 * GLPK LP control parameter
88 glp_smcp control_param_lp;
91 * GLPK LP control parameter
93 glp_iocp control_param_mlp;
96 * Solves the task in an regular interval
98 GNUNET_SCHEDULER_TaskIdentifier mlp_task;
101 * Interval between scheduled problem solving
103 struct GNUNET_TIME_Relative exec_interval;
106 * Maximum execution time per problem solving
108 struct GNUNET_TIME_Relative max_exec_duration;
111 * Maximum number of LP iterations per problem solving
113 unsigned int max_iterations;
115 /* state information */
118 * Do we need to use the LP presolver?
120 * If the problem addresses were added or removed and the last basis was we
121 * need to use the presolver.
122 * presolver_required == GNUNET_YES
124 * If values were modified, we can reuse a valid basis
125 * presolver_required == GNUNET_NO
127 int presolver_required;
132 * Time of last execution
134 struct GNUNET_TIME_Absolute last_execution;
138 * How often was the LP problem solved
140 unsigned int lp_solved;
143 * total duration of all lp solver executions
145 uint64_t lp_total_duration;
148 * How often was the MLP problem solved
150 unsigned int mlp_solved;
153 * total duration of all mlp solver executions
155 uint64_t mlp_total_duration;
157 unsigned int addr_in_problem;
159 /* Information about the problem */
161 struct ATS_Peer *peer_head;
162 struct ATS_Peer *peer_tail;
164 /* Number of peers */
167 /* current problem matrix */
168 /* row index array */
170 /* column index array */
172 /* column index array */
174 /* current size of the constraint matrix |indices| */
175 unsigned int cm_size;
178 /* Row index constraint 2: */
180 /* Row index constraint 4: minimum connections */
182 /* Row index constraint 6: maximize diversity */
184 /* Row index constraint 8: utilization*/
186 /* Row index constraint 9: relativity*/
189 /* column index Diversity (D) column */
193 /* column index Utilization (U) column */
197 /* column index Proportionality (R) column */
201 /* ATS Quality metrics
203 * array with GNUNET_ATS_QualityPropertiesCount elements
204 * contains mapping to GNUNET_ATS_Property*/
205 int q[GNUNET_ATS_QualityPropertiesCount];
207 /* column index quality metrics */
208 int c_q[GNUNET_ATS_QualityPropertiesCount];
210 /* column index quality metrics */
211 int r_q[GNUNET_ATS_QualityPropertiesCount];
213 /* quality metric coefficients*/
214 double co_Q[GNUNET_ATS_QualityPropertiesCount];
216 /* number of quality metrics */
219 /* ATS ressource costs
221 * array with GNUNET_ATS_QualityPropertiesCount elements
222 * contains mapping to GNUNET_ATS_Property*/
223 int rc[GNUNET_ATS_QualityPropertiesCount];
225 /* column index ressource costs */
226 int c_rc[GNUNET_ATS_QualityPropertiesCount];
228 /* ressource costs coefficients*/
229 double co_RC[GNUNET_ATS_QualityPropertiesCount];
231 /* number of quality metrics */
234 /* minimum bandwidth assigned to an address */
237 /* minimum number of addresses with bandwidth assigned */
243 * Address specific MLP information
245 struct MLP_information
247 /* bandwidth column index */
250 /* address usage column */
255 /* constraint 1: bandwidth capping */
258 /* constraint 3: minimum bandwidth */
264 * Init the MLP problem solving component
266 * @param cfg configuration handle
267 * @param stats the GNUNET_STATISTICS handle
268 * @param max_duration maximum numbers of iterations for the LP/MLP Solver
269 * @param max_iterations maximum time limit for the LP/MLP Solver
270 * @return struct GAS_MLP_Handle * on success, NULL on fail
272 struct GAS_MLP_Handle *
273 GAS_mlp_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
274 const struct GNUNET_STATISTICS_Handle *stats,
275 struct GNUNET_TIME_Relative max_duration,
276 unsigned int max_iterations);
280 * Updates a single address in the MLP problem
282 * If the address did not exist before in the problem:
283 * The MLP problem has to be recreated and the problem has to be resolved
285 * Otherwise the addresses' values can be updated and the existing base can
288 * @param mlp the MLP Handle
289 * @param addresses the address hashmap
290 * the address has to be already added from the hashmap
291 * @param address the address to update
294 GAS_mlp_address_update (struct GAS_MLP_Handle *mlp, struct GNUNET_CONTAINER_MultiHashMap * addresses, struct ATS_Address *address);
298 * Deletes a single address in the MLP problem
300 * The MLP problem has to be recreated and the problem has to be resolved
302 * @param mlp the MLP Handle
303 * @param addresses the address hashmap
304 * the address has to be already removed from the hashmap
305 * @param address the address to delete
308 GAS_mlp_address_delete (struct GAS_MLP_Handle *mlp, struct GNUNET_CONTAINER_MultiHashMap * addresses, struct ATS_Address *address);
312 * Changes the preferences for a peer in the MLP problem
314 * @param mlp the MLP Handle
315 * @param peer the peer
316 * @param kind the kind to change the preference
317 * @param float the score
320 GAS_mlp_address_change_preference (struct GAS_MLP_Handle *mlp,
321 const struct GNUNET_PeerIdentity *peer,
322 enum GNUNET_ATS_PreferenceKind kind,
327 * Shutdown the MLP problem solving component
333 /* end of gnunet-service-ats_addresses_mlp.h */