2 This file is part of GNUnet.
3 (C) 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
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 #define VERBOSE GNUNET_YES
43 * How long until we give up on transmitting the message?
45 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
48 static struct GNUNET_DATASTORE_Handle *datastore;
51 * Target datastore size (in bytes).
53 * Example impact of total size on the reported number
54 * of operations (insert and delete) per second (once
55 * roughly stabilized -- this is not "sound" experimental
56 * data but just a rough idea) for a particular machine:
58 * 4: 60 at 7k ops total
59 * 8: 50 at 3k ops total
60 * 16: 48 at 8k ops total
61 * 32: 46 at 8k ops total
62 * 64: 61 at 9k ops total
63 * 128: 89 at 9k ops total
64 * 4092: 11 at 383k ops total (12 GB stored, 14.8 GB DB size on disk, 2.5 GB reported)
66 * Pure insertion performance into an empty DB initially peaks
67 * at about 400 ops. The performance seems to drop especially
68 * once the existing (fragmented) ISAM space is filled up and
69 * the DB needs to grow on disk. This could be explained with
70 * ISAM looking more carefully for defragmentation opportunities.
72 * MySQL disk space overheads (for otherwise unused database when
73 * run with 128 MB target data size; actual size 651 MB, useful
74 * data stored 520 MB) are quite large in the range of 25-30%.
76 * This kind of processing seems to be IO bound (system is roughly
77 * at 90% wait, 10% CPU). This is with MySQL 5.0.
80 #define MAX_SIZE 1024LL * 1024 * 16
83 * Report progress outside of major reports? Should probably be GNUNET_YES if
86 #define REPORT_ID GNUNET_NO
89 * Number of put operations equivalent to 1/10th of MAX_SIZE
91 #define PUT_10 MAX_SIZE / 32 / 1024 / 10
94 * Progress report frequency. 1/10th of a put operation block.
96 #define REP_FREQ PUT_10 / 10
99 * Total number of iterations (each iteration doing
100 * PUT_10 put operations); we report full status every
101 * 10 iterations. Abort with CTRL-C.
103 #define ITERATIONS 100
106 static unsigned long long stored_bytes;
108 static unsigned long long stored_entries;
110 static unsigned long long stored_ops;
112 static struct GNUNET_TIME_Absolute start_time;
127 struct GNUNET_SCHEDULER_Handle *sched;
128 struct GNUNET_CONFIGURATION_Handle *cfg;
131 unsigned long long size;
142 run_continuation (void *cls,
143 const struct GNUNET_SCHEDULER_TaskContext *tc);
149 check_success (void *cls,
155 struct CpsRunContext *crc = cls;
156 if (GNUNET_OK != success)
157 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
159 GNUNET_assert (GNUNET_OK == success);
162 if (ic % REP_FREQ == 0)
163 fprintf (stderr, "I");
165 stored_bytes += crc->size;
169 if (crc->j == PUT_10)
173 if (crc->i == ITERATIONS)
174 crc->phase = RP_DONE;
178 GNUNET_SCHEDULER_add_continuation (crc->sched,
182 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
187 * Continuation called to notify client about result of the
191 * @param success GNUNET_SYSERR on failure
192 * @param msg NULL on success, otherwise an error message
195 remove_next(void *cls,
199 struct CpsRunContext *crc = cls;
204 if (dc % REP_FREQ == 0)
205 fprintf (stderr, "D");
207 GNUNET_assert (GNUNET_OK == success);
208 GNUNET_SCHEDULER_add_continuation (crc->sched,
212 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
218 do_delete (void *cls,
219 const struct GNUNET_SCHEDULER_TaskContext *tc)
221 struct CpsRunContext *crc = cls;
223 stored_bytes -= crc->esize;
225 GNUNET_DATASTORE_remove (datastore,
237 delete_value (void *cls,
238 const GNUNET_HashCode * key,
244 struct GNUNET_TIME_Absolute
245 expiration, uint64_t uid)
247 struct CpsRunContext *crc = cls;
251 crc->phase = RP_REPORT;
252 if (stored_bytes < MAX_SIZE)
254 GNUNET_SCHEDULER_add_continuation (crc->sched,
258 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
261 GNUNET_SCHEDULER_add_after (crc->sched,
263 GNUNET_SCHEDULER_PRIORITY_HIGH,
264 GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
269 if (stored_bytes < MAX_SIZE)
273 memcpy (crc->data, data, size);
278 run_continuation (void *cls,
279 const struct GNUNET_SCHEDULER_TaskContext *tc)
281 struct CpsRunContext *crc = cls;
283 static GNUNET_HashCode key;
284 static char data[65536];
288 ok = (int) crc->phase;
292 memset (&key, 256 - crc->i, sizeof (GNUNET_HashCode));
295 /* most content is 32k */
297 if (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 16) == 0) /* but some of it is less! */
298 size = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 32 * 1024);
299 crc->size = size = size - (size & 7); /* always multiple of 8 */
300 GNUNET_CRYPTO_hash (&key, sizeof (GNUNET_HashCode), &key);
301 memset (data, i, size);
303 memset (data, i - 255, size / 2);
305 GNUNET_DATASTORE_put (datastore,
311 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100),
313 GNUNET_TIME_relative_to_absolute
314 (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
315 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000))),
321 /* trim down below MAX_SIZE again */
322 GNUNET_DATASTORE_get_random (datastore,
333 "Stored %llu kB / %lluk ops / %llu ops/s\n",
334 stored_bytes / 1024, /* used size in k */
335 (stored_ops * 2 - stored_entries) / 1024, /* total operations (in k) */
336 1000 * (stored_ops * 2 - stored_entries) / (1 + GNUNET_TIME_absolute_get_duration(start_time).value)); /* operations per second */
338 GNUNET_SCHEDULER_add_continuation (crc->sched,
342 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
345 GNUNET_DATASTORE_disconnect (datastore, GNUNET_YES);
354 struct GNUNET_SCHEDULER_Handle *sched,
356 const char *cfgfile, struct GNUNET_CONFIGURATION_Handle *cfg)
358 struct CpsRunContext *crc;
360 datastore = GNUNET_DATASTORE_connect (cfg, sched);
362 crc = GNUNET_malloc(sizeof(struct CpsRunContext));
366 GNUNET_SCHEDULER_add_continuation (crc->sched,
370 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
378 char *const argv[] = {
379 "perf-datastore-api",
381 "test_datastore_api_data.conf",
387 struct GNUNET_GETOPT_CommandLineOption options[] = {
388 GNUNET_GETOPT_OPTION_END
390 pid = GNUNET_OS_start_process ("gnunet-service-datastore",
391 "gnunet-service-datastore",
395 "-c", "test_datastore_api_data.conf", NULL);
397 GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1,
398 argv, "perf-datastore-api", "nohelp",
399 options, &run, NULL);
400 if (0 != PLIBC_KILL (pid, SIGTERM))
402 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
405 GNUNET_OS_process_wait(pid);
411 main (int argc, char *argv[])
415 GNUNET_DISK_directory_remove ("/tmp/test-gnunetd-datastore");
416 GNUNET_log_setup ("perf-datastore-api",
429 /* end of perf_datastore_api.c */