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| author | Hassaan Khan <hqkhan2008@gmail.com> | 2023-05-02 09:20:38 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-05-02 16:20:38 +0300 |
| commit | 8163e816fe9b1ef7f1a904d862f6e2e24bc19713 (patch) | |
| tree | 0d42a85c7d7f8ac9714414b5f673f94b374c42f9 | |
| parent | f32d1817e3b133d8e754304ef745e4d40661af24 (diff) | |
| download | redis-8163e816fe9b1ef7f1a904d862f6e2e24bc19713.tar.gz | |
[redis-benchmark] Adding --seed option to seed the RNG (#11945)
Adds ability to set the random seed so that more consistent repeatable benchmarks are possible.
Example usage:
Adding 2 hash items
```
src/redis-benchmark -r 100 -n 2 --seed 250 hset myhash:__rand_int__ age __rand_int__
```
Monitor:
1st benchmark invocation:
```
1679332814.824357 [0 127.0.0.1:36686] "hset" "myhash:000000000022" "age" "000000000069"
1679332814.824404 [0 127.0.0.1:36690] "hset" "myhash:000000000007" "age" "000000000043"
```
2nd benchmark invocation:
```
1679332814.824357 [0 127.0.0.1:36686] "hset" "myhash:000000000022" "age" "000000000069"
1679332814.824404 [0 127.0.0.1:36690] "hset" "myhash:000000000007" "age" "000000000043"
```
| -rw-r--r-- | src/redis-benchmark.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/redis-benchmark.c b/src/redis-benchmark.c index 5e80de076..95f54539c 100644 --- a/src/redis-benchmark.c +++ b/src/redis-benchmark.c @@ -1496,6 +1496,11 @@ int parseOptions(int argc, char **argv) { fprintf(stderr, "WARNING: -e option has no effect. " "We now immediately exit on error to avoid false results.\n"); + } else if (!strcmp(argv[i],"--seed")) { + if (lastarg) goto invalid; + int rand_seed = atoi(argv[++i]); + srandom(rand_seed); + init_genrand64(rand_seed); } else if (!strcmp(argv[i],"-t")) { if (lastarg) goto invalid; /* We get the list of tests to run as a string in the form @@ -1641,7 +1646,8 @@ usage: " The -t option is ignored if a specific command is supplied\n" " on the command line.\n" " -I Idle mode. Just open N idle connections and wait.\n" -" -x Read last argument from STDIN.\n", +" -x Read last argument from STDIN.\n" +" --seed <num> Set the seed for random number generator. Default seed is based on time.\n", tls_usage, " --help Output this help and exit.\n" " --version Output version and exit.\n\n" |