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3 (C) 2004, 2005, 2006, 2007 Christian Grothoff (and other contributing authors)
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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 deletes
26 * data until the (reported) database size drops below a given threshold.
27 * This is iterated 10 times, with the actual size of the content stored,
28 * the database size reported and the file size on disk being printed for
29 * 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 alternates between "lowest priority" and "earliest expiration".
32 * Priorities and expiration dates are set using a pseudo-random value
33 * within a realistic range.
37 #include "gnunet_util_lib.h"
38 #include "gnunet_protocols.h"
39 #include "gnunet_datastore_service.h"
41 static struct GNUNET_DATASTORE_Handle *datastore;
44 * How long until we give up on transmitting the message?
46 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
49 * Target datastore size (in bytes).
51 * Example impact of total size on the reported number
52 * of operations (insert and delete) per second (once
53 * roughly stabilized -- this is not "sound" experimental
54 * data but just a rough idea) for a particular machine:
56 * 4: 60 at 7k ops total
57 * 8: 50 at 3k ops total
58 * 16: 48 at 8k ops total
59 * 32: 46 at 8k ops total
60 * 64: 61 at 9k ops total
61 * 128: 89 at 9k ops total
62 * 4092: 11 at 383k ops total (12 GB stored, 14.8 GB DB size on disk, 2.5 GB reported)
64 * Pure insertion performance into an empty DB initially peaks
65 * at about 400 ops. The performance seems to drop especially
66 * once the existing (fragmented) ISAM space is filled up and
67 * the DB needs to grow on disk. This could be explained with
68 * ISAM looking more carefully for defragmentation opportunities.
70 * MySQL disk space overheads (for otherwise unused database when
71 * run with 128 MB target data size; actual size 651 MB, useful
72 * data stored 520 MB) are quite large in the range of 25-30%.
74 * This kind of processing seems to be IO bound (system is roughly
75 * at 90% wait, 10% CPU). This is with MySQL 5.0.
78 #define MAX_SIZE 1024LL * 1024 * 16
81 * Report progress outside of major reports? Should probably be GNUNET_YES if
84 #define REPORT_ID GNUNET_NO
87 * Number of put operations equivalent to 1/10th of MAX_SIZE
89 #define PUT_10 MAX_SIZE / 32 / 1024 / 10
92 * Progress report frequency. 1/10th of a put operation block.
94 #define REP_FREQ PUT_10 / 10
97 * Total number of iterations (each iteration doing
98 * PUT_10 put operations); we report full status every
99 * 10 iterations. Abort with CTRL-C.
101 #define ITERATIONS 100
104 static unsigned long long stored_bytes;
106 static unsigned long long stored_entries;
108 static unsigned long long stored_ops;
110 static struct GNUNET_TIME_Absolute start_time;
125 struct GNUNET_SCHEDULER_Handle *sched;
126 struct GNUNET_CONFIGURATION_Handle *cfg;
129 unsigned long long size;
136 run_continuation (void *cls,
137 const struct GNUNET_SCHEDULER_TaskContext *tc);
143 check_success (void *cls,
149 struct CpsRunContext *crc = cls;
150 if (GNUNET_OK != success)
151 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
153 GNUNET_assert (GNUNET_OK == success);
156 if (ic % REP_FREQ == 0)
157 fprintf (stderr, "I");
159 stored_bytes += crc->size;
163 if (crc->j == PUT_10)
167 if (crc->i == ITERATIONS)
168 crc->phase = RP_DONE;
172 GNUNET_SCHEDULER_add_continuation (crc->sched,
176 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
181 * Continuation called to notify client about result of the
185 * @param success GNUNET_SYSERR on failure
186 * @param msg NULL on success, otherwise an error message
189 remove_next(void *cls,
193 GNUNET_assert (GNUNET_OK == success);
198 delete_value (void *cls,
199 const GNUNET_HashCode * key,
205 struct GNUNET_TIME_Absolute
206 expiration, uint64_t uid)
208 struct CpsRunContext *crc = cls;
210 /* FIXME: should probably abort deletion iteration
211 earlier (to not delete everything...) */
214 crc->phase = RP_REPORT;
215 /* FIXME: should wait for all "remove_next" calls
216 to complete before going back to the run_continuation */
217 GNUNET_SCHEDULER_add_continuation (crc->sched,
221 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
224 GNUNET_DATASTORE_remove (datastore,
235 run_continuation (void *cls,
236 const struct GNUNET_SCHEDULER_TaskContext *tc)
238 struct CpsRunContext *crc = cls;
240 static GNUNET_HashCode key;
241 static char data[65536];
245 ok = (int) crc->phase;
249 memset (&key, 256 - crc->i, sizeof (GNUNET_HashCode));
252 /* most content is 32k */
254 if (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 16) == 0) /* but some of it is less! */
255 size = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 32 * 1024);
256 crc->size = size = size - (size & 7); /* always multiple of 8 */
257 GNUNET_CRYPTO_hash (&key, sizeof (GNUNET_HashCode), &key);
258 memset (data, i, size);
260 memset (data, i - 255, size / 2);
262 GNUNET_DATASTORE_put (datastore,
268 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100),
270 GNUNET_TIME_relative_to_absolute
271 (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
272 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000))),
278 /* trim down below MAX_SIZE again */
281 GNUNET_DATASTORE_get_random (datastore,
286 crc->phase = RP_REPORT;
287 GNUNET_SCHEDULER_add_continuation (crc->sched,
291 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
299 "Stored %llu kB / %lluk ops / %llu ops/s\n",
300 stored_bytes / 1024, /* used size in k */
301 (stored_ops * 2 - stored_entries) / 1024, /* total operations (in k) */
302 1000 * (stored_ops * 2 - stored_entries) / (1 + GNUNET_TIME_absolute_get_duration(start_time).value)); /* operations per second */
304 GNUNET_SCHEDULER_add_continuation (crc->sched,
308 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
311 GNUNET_DATASTORE_disconnect (datastore, GNUNET_YES);
320 struct GNUNET_SCHEDULER_Handle *sched,
322 const char *cfgfile, struct GNUNET_CONFIGURATION_Handle *cfg)
324 struct CpsRunContext *crc;
326 datastore = GNUNET_DATASTORE_connect (cfg, sched);
328 crc = GNUNET_malloc(sizeof(struct CpsRunContext));
332 GNUNET_SCHEDULER_add_continuation (crc->sched,
336 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
344 char *const argv[] = { "perf-datastore-api",
346 "test_datastore_api_data.conf",
352 struct GNUNET_GETOPT_CommandLineOption options[] = {
353 GNUNET_GETOPT_OPTION_END
355 pid = GNUNET_OS_start_process ("gnunet-service-datastore",
356 "gnunet-service-datastore",
360 "-c", "test_datastore_api_data.conf", NULL);
362 GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1,
363 argv, "perf-datastore-api", "nohelp",
364 options, &run, NULL);
365 if (0 != PLIBC_KILL (pid, SIGTERM))
367 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
370 GNUNET_OS_process_wait(pid);
372 fprintf (stderr, "Missed some testcases: %u\n", ok);
378 main (int argc, char *argv[])
382 GNUNET_log_setup ("perf-datastore-api",
395 /* end of perf_datastore_api.c */