summaryrefslogtreecommitdiff
path: root/src/mintdb/perf_taler_mintdb_interpreter.c
blob: b92d6dc32f3ed0f2d5bc6f10400589efe4084c65 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
/*
   This file is part of TALER
   Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)

   TALER 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.

   TALER 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.

   You should have received a copy of the GNU General Public License along with
   TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
   */
/**
 * @file mintdb/perf_taler_mintdb_interpreter.c
 * @brief Interpreter library for mint database performance analysis
 * @author Nicolas Fournier
 */
#include "platform.h"
#include "perf_taler_mintdb_interpreter.h"
#include "perf_taler_mintdb_init.h"
#include "gauger.h"


/**
 * Represents the state of the interpreter
 */
struct PERF_TALER_MINTDB_interpreter_state
{
  /**
   * State of the commands
   */
  struct PERF_TALER_MINTDB_Cmd *cmd;

  /**
   * Database plugin
   */
  struct TALER_MINTDB_Plugin *plugin;

  /**
   * Current database session
   */
  struct TALER_MINTDB_Session *session;

  /**
   * The current index of the interpreter
   */
  int i;
};

/**
 * Free the memory of @a data, with data of type @a type
 */
static void
data_free (union PERF_TALER_MINTDB_Data *data, enum PERF_TALER_MINTDB_Type type)
{
  switch (type)
  {
    case PERF_TALER_MINTDB_DEPOSIT:
      PERF_TALER_MINTDB_deposit_free (data->deposit);
      data->deposit = NULL;
      return;

    case PERF_TALER_MINTDB_BLINDCOIN:
      PERF_TALER_MINTDB_collectable_blindcoin_free (data->blindcoin);
      data->blindcoin = NULL;
      return;

    case PERF_TALER_MINTDB_RESERVE:
      PERF_TALER_MINTDB_reserve_free (data->reserve);
      data->reserve = NULL;
      return;

    case PERF_TALER_MINTDB_DENOMINATION_INFO:
      PERF_TALER_MINTDB_denomination_free (data->dki);
      data->dki = NULL;
      return;

    case PERF_TALER_MINTDB_COIN_INFO:
      PERF_TALER_MINTDB_coin_public_info_free (data->cpi);
      data->cpi = NULL;
      return;

    default:
      return;
  }
} 



/**
 * Finds the first command in cmd with the name search
 *
 * @return the index of the first command with name search
 * GNUNET_SYSERR if none found
 */
static int
cmd_find (const struct  PERF_TALER_MINTDB_Cmd *cmd, const char *search)
{
  int i;

  for (i=0; PERF_TALER_MINTDB_CMD_END != cmd[i].command; i++)
    if (0 == strcmp (cmd[i].label, search))
      return i;
  return GNUNET_SYSERR;
}


/**
 * Initialization of a command array      
 */
static int
cmd_init (struct PERF_TALER_MINTDB_Cmd cmd[])
{
  int i = 0;
  for (i=0; PERF_TALER_MINTDB_CMD_END != cmd[i].command; i++)
  {
    switch (cmd[i].command)
    {
      case PERF_TALER_MINTDB_CMD_SAVE_ARRAY:
        // Allocation of memory for saving data
        cmd[i].details.save_array.data_saved = 
          GNUNET_new_array (cmd[i].details.save_array.nb_saved, 
                            union PERF_TALER_MINTDB_Data);
        break;

      case PERF_TALER_MINTDB_CMD_LOAD_ARRAY:
        // Creating the permutation array to randomize the data order
        cmd[i].details.load_array.permutation =
          GNUNET_CRYPTO_random_permute (
                                        GNUNET_CRYPTO_QUALITY_WEAK,
                                        cmd[cmd_find (cmd, 
                                                      cmd[i].details
                                                        .load_array.label_save)]
                                        .details.save_array.nb_saved);

        // Initializing the type based on the type of the saved array
        cmd[i].exposed_type = cmd[cmd_find (cmd, 
                                            cmd[i].details.load_array.label_save)]
          .details.save_array.type_saved;
        break;

      default:
        break;
    }
  }
  return GNUNET_OK;
}


/**
 * Free the memory of the command chain
 */
static int
cmd_clean (struct PERF_TALER_MINTDB_Cmd cmd[])
{
  int i = 0;
  for (i = 0; PERF_TALER_MINTDB_CMD_END != cmd[i].command; i++)
  {
    switch (cmd[i].command)
    {
      case PERF_TALER_MINTDB_CMD_SAVE_ARRAY:
        {
          int j;
          for (j = 0; j < cmd[i].details.save_array.nb_saved; j++)
          {
            data_free (&cmd[i].details.save_array.data_saved[j],
                       cmd[i].details.save_array.type_saved);
          }

          GNUNET_free (cmd[i].details.save_array.data_saved);
          cmd[i].details.save_array.data_saved = NULL;
        }

      case PERF_TALER_MINTDB_CMD_LOAD_ARRAY:
        GNUNET_free (cmd[i].details.load_array.permutation);
        break;

      default:
        data_free (&cmd[i].exposed, cmd[i].exposed_type);
        break;

    }
    i++;
  }
  return GNUNET_OK;
};


/**
 * Handles the command END_LOOP for the interpreter
 */
static void
interpret_end_loop (struct PERF_TALER_MINTDB_interpreter_state *state)
{
  int jump = cmd_find (state->cmd, 
                       state->cmd[state->i].details.end_loop.label_loop);
  
  state->cmd[jump].details.loop.curr_iteration++;
  // If the loop is not finished
  if (state->cmd[jump].details.loop.max_iterations > 
      state->cmd[jump].details.loop.curr_iteration)
  {
    // jump back to the start
    state->i = jump;
  }else{
    // Reset the loop counter and continue running
    state->cmd[jump].details.loop.curr_iteration = 0;
  }
  // Cleaning up the memory in the loop
  int j;
  for (j = jump; j < state->i; j++)
  {
    // If the exposed variable has not been copied it is freed
    if ( GNUNET_NO == state->cmd[j].exposed_saved)
      data_free (&state->cmd[j].exposed, state->cmd[j].exposed_type);
    state->cmd[j].exposed_saved = GNUNET_NO;
  }
}

static void
interpret_save_array (struct PERF_TALER_MINTDB_interpreter_state *state)
{
  int loop_index;
  int selection_chance;
  // Array initialization on first loop iteration
  // Alows for nested loops
  if (0 == state->cmd[cmd_find (state->cmd, 
                                state->cmd[state->i]
                                .details.save_array.label_loop)]
      .details.loop.curr_iteration)
  {
    state->cmd[state->i].details.save_array.index = 0;
  }
  loop_index = cmd_find (state->cmd, 
                         state->cmd[state->i].details.save_array.label_loop);
  // The probobility distribution of the saved items will be a little biased 
  // against the few last items but it should not be a big problem.
  selection_chance = state->cmd[loop_index].details.loop.max_iterations /
    state->cmd[state->i].details.save_array.nb_saved;
  /*
   * If the remaining sapce is equal to the remaining number of
   * iterations, the item is automaticly saved.
   *
   * Else it is saved only if rdn is 0
   */
  if (((state->cmd[loop_index].details.loop.max_iterations - 
        state->cmd[loop_index].details.loop.curr_iteration) ==
       (state->cmd[state->i].details.save_array.nb_saved - 
        state->cmd[state->i].details.save_array.index))
      || (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 
                                         selection_chance)))
  {
    union PERF_TALER_MINTDB_Data *save_location;
    union PERF_TALER_MINTDB_Data *item_saved;

    save_location = &state->cmd[state->i].details.save_array
      .data_saved[state->cmd[state->i].details.save_array.index];
    item_saved = &state->cmd[cmd_find (state->cmd, 
                                       state->cmd[state->i]
                                       .details.save_array.label_save)]
      .exposed;
    switch (state->cmd[state->i].details.save_array.type_saved)
    {
      case PERF_TALER_MINTDB_TIME:
        save_location->time = item_saved->time;
        break;

      case PERF_TALER_MINTDB_DEPOSIT:
        save_location->deposit = item_saved->deposit;
        break;

      case PERF_TALER_MINTDB_BLINDCOIN:
        save_location->blindcoin = item_saved->blindcoin;
        break;

      case PERF_TALER_MINTDB_RESERVE:
        save_location->reserve = item_saved->reserve;
        break;

      case PERF_TALER_MINTDB_DENOMINATION_INFO:
        save_location->dki = item_saved->dki;
        break;

      case PERF_TALER_MINTDB_COIN_INFO:
        save_location->cpi = item_saved->cpi;
        break;

      default:
        break;
    }
    state->cmd[cmd_find (state->cmd,
                         state->cmd[state->i].details.save_array.label_save)]
      .exposed_saved = GNUNET_YES;
    state->cmd[state->i].details.save_array.index++;
  }
}

/**
 * Main interpreter loop.
 * 
 */
static int
interpret (struct PERF_TALER_MINTDB_interpreter_state *state)
{

  for (state->i=0; PERF_TALER_MINTDB_CMD_END != state->cmd[state->i].command; state->i++)
  {
    switch (state->cmd[state->i].command)
    {
      case PERF_TALER_MINTDB_CMD_END:
        return GNUNET_YES;

      case PERF_TALER_MINTDB_CMD_DEBUG:
        printf ("%s\n", state->cmd[state->i].label);
        break;

      case PERF_TALER_MINTDB_CMD_LOOP:
        break;

      case PERF_TALER_MINTDB_CMD_END_LOOP:
        interpret_end_loop (state);
        break;

      case PERF_TALER_MINTDB_CMD_GET_TIME:
        clock_gettime (CLOCK_MONOTONIC, &state->cmd[state->i].exposed.time);
        break;

      case PERF_TALER_MINTDB_CMD_GAUGER:
        {
          int start_index, stop_index; 
          struct timespec start, stop;
          unsigned long elapsed_ms;
          start_index  = cmd_find (state->cmd, 
                                   state->cmd[state->i].details.gauger.label_start);
          stop_index  = cmd_find (state->cmd, 
                                  state->cmd[state->i].details.gauger.label_stop);
          start = state->cmd [start_index].exposed.time;
          stop = state->cmd [stop_index].exposed.time;
          elapsed_ms = (start.tv_sec - stop.tv_sec) * 1000 + 
            (start.tv_nsec - stop.tv_nsec) / 1000000;

          GAUGER ("MINTDB", 
                  state->cmd[state->i].details.gauger.description, 
                  elapsed_ms, 
                  "milliseconds");
        }
        break;

      case PERF_TALER_MINTDB_CMD_NEW_SESSION:
        state->session = state->plugin->get_session (state->plugin->cls, GNUNET_YES);
        break;

      case PERF_TALER_MINTDB_CMD_START_TRANSACTION:
        state->plugin->start (state->plugin->cls, state->session);
        break;

      case PERF_TALER_MINTDB_CMD_COMMIT_TRANSACTION:
        state->plugin->commit (state->plugin->cls, state->session);
        break;

      case PERF_TALER_MINTDB_CMD_ABORT_TRANSACTION:
        state->plugin->rollback (state->plugin->cls, state->session);

      case PERF_TALER_MINTDB_CMD_SAVE_ARRAY:
        interpret_save_array (state);
//        {
//          int loop_index;
//          int proba;
//          int rnd;
//          // Array initialization on first loop iteration
//          // Alows for nested loops
//          if (0 == state->cmd[cmd_find (state->cmd, 
//                                        state->cmd[state->i]
//                                        .details.save_array.label_loop)]
//              .details.loop.curr_iteration)
//          {
//            state->cmd[state->i].details.save_array.index = 0;
//          }
//          loop_index = cmd_find (state->cmd, 
//                                 state->cmd[state->i].details.save_array.label_loop);
//          // The probobility distribution of the saved items will be a little biased 
//          // against the few last items but it should not be a big problem.
//          proba = state->cmd[loop_index].details.loop.max_iterations /
//            state->cmd[state->i].details.save_array.nb_saved;
//          rnd = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, proba);
//          /*
//           * If the remaining sapce is equal to the remaining number of
//           * iterations, the item is automaticly saved.
//           *
//           * Else it is saved only if rdn is 0
//           */
//          if (((state->cmd[loop_index].details.loop.max_iterations - 
//                state->cmd[loop_index].details.loop.curr_iteration) ==
//               (state->cmd[state->i].details.save_array.nb_saved - 
//                state->cmd[state->i].details.save_array.index))
//              || (rnd == 0))
//          {
//            union PERF_TALER_MINTDB_Data *save_location;
//            union PERF_TALER_MINTDB_Data *item_saved;
//
//            save_location = &state->cmd[state->i].details.save_array
//              .data_saved[state->cmd[state->i].details.save_array.index];
//            item_saved = &state->cmd[cmd_find (state->cmd, 
//                                               state->cmd[state->i]
//                                                .details.save_array.label_save)]
//              .exposed;
//            switch (state->cmd[state->i].details.save_array.type_saved)
//            {
//              case PERF_TALER_MINTDB_DEPOSIT:
//                save_location->deposit = item_saved->deposit;
//                break;
//
//              case PERF_TALER_MINTDB_TIME:
//                save_location->time = item_saved->time;
//                break;
//
//              default:
//                break;
//            }
//            state->cmd[cmd_find (state->cmd,
//                                state->cmd[state->i].details.save_array.label_save)]
//              .exposed_saved = GNUNET_YES;
//            state->cmd[state->i].details.save_array.index++;
//          }
//        }
        break;

      case PERF_TALER_MINTDB_CMD_LOAD_ARRAY:
        {
          int loop_index, save_index;
          union PERF_TALER_MINTDB_Data loaded_data;
          loop_index = cmd_find (state->cmd, 
                                 state->cmd[state->i].details.load_array.label_loop);
          save_index = cmd_find (state->cmd, 
                                 state->cmd[state->i].details.load_array.label_save);
          /* Extracting the data from the loop_indexth indice in save_index
           * array.
           */
          loaded_data = state->cmd[save_index].details.save_array.data_saved[
            state->cmd[state->i].details.load_array.permutation[
              state->cmd[loop_index].details.loop.curr_iteration]];

          switch (state->cmd[state->i].exposed_type)
          {
            case PERF_TALER_MINTDB_DEPOSIT:
              state->cmd[state->i].exposed.deposit = loaded_data.deposit;
              break;

            case PERF_TALER_MINTDB_TIME:
              state->cmd[state->i].exposed.time = loaded_data.time;
              break;

            default:
              break;
          }
        }
        break;

      case PERF_TALER_MINTDB_CMD_INSERT_DEPOSIT:
        {
         struct TALER_MINTDB_Deposit *deposit =
           PERF_TALER_MINTDB_deposit_init ();

         GNUNET_assert (
                        state->plugin->insert_deposit (state->plugin->cls, 
                                                       state->session, 
                                                       deposit));
         state->cmd[state->i].exposed.deposit = deposit;
        }
        break;

      case PERF_TALER_MINTDB_CMD_GET_DEPOSIT:
        {
          struct TALER_MINTDB_Deposit *deposit = 
            state->cmd[cmd_find (state->cmd, 
                                 state->cmd[state->i]
                                 .details.get_deposit.label_source)]
            .exposed.deposit; // Get the deposit from the source
          state->plugin->have_deposit (state->plugin->cls, 
                                       state->session, deposit);
        }
        break;

      default :
        break;
    }
  }
  return GNUNET_OK;
}


/**
 * Runs the commands given in @a cmd, working with
 * the database referenced by @a db_plugin
 */
int
PERF_TALER_MINTDB_interpret (struct TALER_MINTDB_Plugin *db_plugin,
                             struct PERF_TALER_MINTDB_Cmd cmd[])
{
  struct PERF_TALER_MINTDB_interpreter_state state = 
  {.i = 0, .cmd = cmd, .plugin = db_plugin};

  // Initializing commands
  cmd_init (state.cmd);
  // Running the interpreter
  GNUNET_assert(NULL !=
                (state.session = db_plugin->get_session (db_plugin->cls, GNUNET_YES)));
  interpret (&state);
  // Cleaning the memory
  cmd_clean (cmd);
  return GNUNET_YES;
}