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 VERBOSE GNUNET_EXTRA_LOGGING
38 #define DEBUG_MLP GNUNET_EXTRA_LOGGING
40 #define MLP_MAX_EXEC_DURATION GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 3)
41 #define MLP_MAX_ITERATIONS INT_MAX
45 struct ATS_Peer *next;
46 struct ATS_Peer *prev;
48 struct GNUNET_PeerIdentity id;
50 struct ATS_Address *head;
51 struct ATS_Address *tail;
62 struct GNUNET_STATISTICS_Handle *stats;
65 * GLPK (MLP) problem object
74 * GLPK LP control parameter
76 glp_smcp control_param_lp;
79 * GLPK LP control parameter
81 glp_iocp control_param_mlp;
84 * Solves the task in an regular interval
86 GNUNET_SCHEDULER_TaskIdentifier mlp_task;
89 * Interval between scheduled problem solving
91 struct GNUNET_TIME_Relative exec_interval;
94 * Maximum execution time per problem solving
96 struct GNUNET_TIME_Relative max_exec_duration;
99 * Maximum number of LP iterations per problem solving
101 unsigned int max_iterations;
103 /* state information */
106 * Do we need to use the LP presolver?
108 * If the problem addresses were added or removed and the last basis was we
109 * need to use the presolver.
110 * presolver_required == GNUNET_YES
112 * If values were modified, we can reuse a valid basis
113 * presolver_required == GNUNET_NO
115 int presolver_required;
120 * Time of last execution
122 struct GNUNET_TIME_Absolute last_execution;
126 * How often was the LP problem solved
128 unsigned int lp_solved;
131 * total duration of all lp solver executions
133 uint64_t lp_total_duration;
136 * How often was the MLP problem solved
138 unsigned int mlp_solved;
141 * total duration of all mlp solver executions
143 uint64_t mlp_total_duration;
145 unsigned int addr_in_problem;
147 /* Information about the problem */
149 struct ATS_Peer *peer_head;
150 struct ATS_Peer *peer_tail;
152 /* Number of peers */
155 /* current problem matrix */
156 /* row index array */
158 /* column index array */
160 /* column index array */
162 /* current size of the constraint matrix |indices| */
163 unsigned int cm_size;
166 /* Row index constraint 4: minimum connections */
169 /* column index Diversity (D) column */
173 /* column index Utilization (U) column */
177 /* column index Proportionality (R) column */
181 /* ATS Quality metrics
182 * array with GNUNET_ATS_QualityPropertiesCount elements
183 * contains mapping to GNUNET_ATS_Property*/
184 int q[GNUNET_ATS_QualityPropertiesCount];
186 /* column index quality metrics */
187 int c_q[GNUNET_ATS_QualityPropertiesCount];
189 /* quality metric coefficients*/
190 double co_Q[GNUNET_ATS_QualityPropertiesCount];
192 /* number of quality metrics */
195 /* minimum bandwidth assigned to an address */
198 /* minimum number of addresses with bandwidth assigned */
204 * Address specific MLP information
206 struct MLP_information
208 /* bandwidth column index */
211 /* address usage column */
216 /* constraint 1: bandwidth capping */
219 /* constraint 3: minimum bandwidth */
225 * Init the MLP problem solving component
227 * @param cfg configuration handle
228 * @param stats the GNUNET_STATISTICS handle
229 * @param max_duration maximum numbers of iterations for the LP/MLP Solver
230 * @param max_iterations maximum time limit for the LP/MLP Solver
231 * @return struct GAS_MLP_Handle * on success, NULL on fail
233 struct GAS_MLP_Handle *
234 GAS_mlp_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
235 const struct GNUNET_STATISTICS_Handle *stats,
236 struct GNUNET_TIME_Relative max_duration,
237 unsigned int max_iterations);
241 * Updates a single address in the MLP problem
243 * If the address did not exist before in the problem:
244 * The MLP problem has to be recreated and the problem has to be resolved
246 * Otherwise the addresses' values can be updated and the existing base can
249 * @param mlp the MLP Handle
250 * @param addresses the address hashmap
251 * @param address the address to update
254 GAS_mlp_address_update (struct GAS_MLP_Handle *mlp, struct GNUNET_CONTAINER_MultiHashMap * addresses, struct ATS_Address *address);
258 * Deletes a single address in the MLP problem
260 * The MLP problem has to be recreated and the problem has to be resolved
262 * @param mlp the MLP Handle
263 * @param addresses the address hashmap
264 * @param address the address to delete
267 GAS_mlp_address_delete (struct GAS_MLP_Handle *mlp, struct GNUNET_CONTAINER_MultiHashMap * addresses, struct ATS_Address *address);
271 * Deletes a single address in the MLP problem
273 * @param mlp the MLP Handle
274 * @param addresses the address hashmap
275 * @param address the address to change the preference
278 GAS_mlp_address_change_preference (struct GAS_MLP_Handle *mlp, struct GNUNET_CONTAINER_MultiHashMap * addresses, struct ATS_Address *address);
282 * Shutdown the MLP problem solving component
288 /* end of gnunet-service-ats_addresses_mlp.h */