2 This file is part of GNUnet.
3 (C) 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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21 * @file datastore/perf_datastore_api.c
22 * @brief performance measurement for the datastore implementation
23 * @author Christian Grothoff
25 * This testcase inserts a bunch of (variable size) data and then
26 * deletes data until the (reported) database size drops below a given
27 * threshold. This is iterated 10 times, with the actual size of the
28 * content stored and the number of operations performed being printed
29 * for each iteration. The code also prints a "I" for every 40 blocks
30 * inserted and a "D" for every 40 blocks deleted. The deletion
31 * strategy uses the "random" iterator. Priorities and expiration
32 * dates are set using a pseudo-random value within a realistic range.
36 #include "gnunet_util_lib.h"
37 #include "gnunet_protocols.h"
38 #include "gnunet_datastore_service.h"
40 static struct GNUNET_DATASTORE_Handle *datastore;
43 * How long until we give up on transmitting the message?
45 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
48 * Target datastore size (in bytes).
50 * Example impact of total size on the reported number
51 * of operations (insert and delete) per second (once
52 * roughly stabilized -- this is not "sound" experimental
53 * data but just a rough idea) for a particular machine:
55 * 4: 60 at 7k ops total
56 * 8: 50 at 3k ops total
57 * 16: 48 at 8k ops total
58 * 32: 46 at 8k ops total
59 * 64: 61 at 9k ops total
60 * 128: 89 at 9k ops total
61 * 4092: 11 at 383k ops total (12 GB stored, 14.8 GB DB size on disk, 2.5 GB reported)
63 * Pure insertion performance into an empty DB initially peaks
64 * at about 400 ops. The performance seems to drop especially
65 * once the existing (fragmented) ISAM space is filled up and
66 * the DB needs to grow on disk. This could be explained with
67 * ISAM looking more carefully for defragmentation opportunities.
69 * MySQL disk space overheads (for otherwise unused database when
70 * run with 128 MB target data size; actual size 651 MB, useful
71 * data stored 520 MB) are quite large in the range of 25-30%.
73 * This kind of processing seems to be IO bound (system is roughly
74 * at 90% wait, 10% CPU). This is with MySQL 5.0.
77 #define MAX_SIZE 1024LL * 1024 * 16
80 * Report progress outside of major reports? Should probably be GNUNET_YES if
83 #define REPORT_ID GNUNET_NO
86 * Number of put operations equivalent to 1/10th of MAX_SIZE
88 #define PUT_10 MAX_SIZE / 32 / 1024 / 10
91 * Progress report frequency. 1/10th of a put operation block.
93 #define REP_FREQ PUT_10 / 10
96 * Total number of iterations (each iteration doing
97 * PUT_10 put operations); we report full status every
98 * 10 iterations. Abort with CTRL-C.
100 #define ITERATIONS 100
103 static unsigned long long stored_bytes;
105 static unsigned long long stored_entries;
107 static unsigned long long stored_ops;
109 static struct GNUNET_TIME_Absolute start_time;
124 struct GNUNET_SCHEDULER_Handle *sched;
125 struct GNUNET_CONFIGURATION_Handle *cfg;
128 unsigned long long size;
139 run_continuation (void *cls,
140 const struct GNUNET_SCHEDULER_TaskContext *tc);
146 check_success (void *cls,
152 struct CpsRunContext *crc = cls;
153 if (GNUNET_OK != success)
154 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
156 GNUNET_assert (GNUNET_OK == success);
159 if (ic % REP_FREQ == 0)
160 fprintf (stderr, "I");
162 stored_bytes += crc->size;
166 if (crc->j == PUT_10)
170 if (crc->i == ITERATIONS)
171 crc->phase = RP_DONE;
175 GNUNET_SCHEDULER_add_continuation (crc->sched,
179 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
184 * Continuation called to notify client about result of the
188 * @param success GNUNET_SYSERR on failure
189 * @param msg NULL on success, otherwise an error message
192 remove_next(void *cls,
199 if (dc % REP_FREQ == 0)
200 fprintf (stderr, "D");
202 GNUNET_assert (GNUNET_OK == success);
208 do_delete (void *cls,
209 const struct GNUNET_SCHEDULER_TaskContext *tc)
211 struct CpsRunContext *crc = cls;
213 GNUNET_DATASTORE_remove (datastore,
224 delete_value (void *cls,
225 const GNUNET_HashCode * key,
231 struct GNUNET_TIME_Absolute
232 expiration, uint64_t uid)
234 struct CpsRunContext *crc = cls;
236 if (stored_bytes < MAX_SIZE)
240 crc->phase = RP_REPORT;
241 GNUNET_SCHEDULER_add_continuation (crc->sched,
245 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
248 stored_bytes -= size;
252 memcpy (crc->data, data, size);
253 GNUNET_SCHEDULER_add_after (crc->sched,
255 GNUNET_SCHEDULER_PRIORITY_HIGH,
256 GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
263 run_continuation (void *cls,
264 const struct GNUNET_SCHEDULER_TaskContext *tc)
266 struct CpsRunContext *crc = cls;
268 static GNUNET_HashCode key;
269 static char data[65536];
273 ok = (int) crc->phase;
277 memset (&key, 256 - crc->i, sizeof (GNUNET_HashCode));
280 /* most content is 32k */
282 if (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 16) == 0) /* but some of it is less! */
283 size = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 32 * 1024);
284 crc->size = size = size - (size & 7); /* always multiple of 8 */
285 GNUNET_CRYPTO_hash (&key, sizeof (GNUNET_HashCode), &key);
286 memset (data, i, size);
288 memset (data, i - 255, size / 2);
290 GNUNET_DATASTORE_put (datastore,
296 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100),
298 GNUNET_TIME_relative_to_absolute
299 (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
300 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000))),
306 /* trim down below MAX_SIZE again */
307 GNUNET_DATASTORE_get_random (datastore,
317 "Stored %llu kB / %lluk ops / %llu ops/s\n",
318 stored_bytes / 1024, /* used size in k */
319 (stored_ops * 2 - stored_entries) / 1024, /* total operations (in k) */
320 1000 * (stored_ops * 2 - stored_entries) / (1 + GNUNET_TIME_absolute_get_duration(start_time).value)); /* operations per second */
322 GNUNET_SCHEDULER_add_continuation (crc->sched,
326 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
329 GNUNET_DATASTORE_disconnect (datastore, GNUNET_YES);
338 struct GNUNET_SCHEDULER_Handle *sched,
340 const char *cfgfile, struct GNUNET_CONFIGURATION_Handle *cfg)
342 struct CpsRunContext *crc;
344 datastore = GNUNET_DATASTORE_connect (cfg, sched);
346 crc = GNUNET_malloc(sizeof(struct CpsRunContext));
350 GNUNET_SCHEDULER_add_continuation (crc->sched,
354 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
362 char *const argv[] = {
363 "perf-datastore-api",
365 "test_datastore_api_data.conf",
371 struct GNUNET_GETOPT_CommandLineOption options[] = {
372 GNUNET_GETOPT_OPTION_END
374 pid = GNUNET_OS_start_process ("gnunet-service-datastore",
375 "gnunet-service-datastore",
379 "-c", "test_datastore_api_data.conf", NULL);
381 GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1,
382 argv, "perf-datastore-api", "nohelp",
383 options, &run, NULL);
384 if (0 != PLIBC_KILL (pid, SIGTERM))
386 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
389 GNUNET_OS_process_wait(pid);
395 main (int argc, char *argv[])
399 GNUNET_log_setup ("perf-datastore-api",
412 /* end of perf_datastore_api.c */