diff options
| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2019-05-22 16:57:20 +0100 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2019-05-23 15:12:13 +0100 |
| commit | 7f120c5f1bff2727d50f3c392d81c0f6878b61d6 (patch) | |
| tree | cf1e21049ba248abeff046d93efb6cec77eb3796 /benchmarks | |
| parent | ccc473acb1eaf47f3cef9af9fec06bc53d047835 (diff) | |
gem_wsim: Allow random seed control
New command line option to allow controling the initial pseudo random
generator seed in order to allow repeatable runs.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Suggested-by: Simon Ser <simon.ser@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'benchmarks')
| -rw-r--r-- | benchmarks/gem_wsim.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/benchmarks/gem_wsim.c b/benchmarks/gem_wsim.c index c43bbbc8..e2ffb93a 100644 --- a/benchmarks/gem_wsim.c +++ b/benchmarks/gem_wsim.c @@ -2946,6 +2946,7 @@ static void print_help(void) " -t <n> Nop calibration tolerance percentage.\n" " Use when there is a difficulty obtaining calibration with the\n" " default settings.\n" +" -I <n> Initial randomness seed.\n" " -p <n> Context priority to use for the following workload on the\n" " command line.\n" " -w <desc|path> Filename or a workload descriptor.\n" @@ -3119,11 +3120,9 @@ int main(int argc, char **argv) init_clocks(); master_prng = time(NULL); - srand(master_prng); - master_prng = rand(); while ((c = getopt(argc, argv, - "hqv2RsSHxGdc:n:r:w:W:a:t:b:p:")) != -1) { + "hqv2RsSHxGdc:n:r:w:W:a:t:b:p:I:")) != -1) { switch (c) { case 'W': if (master_workload >= 0) { @@ -3210,6 +3209,9 @@ int main(int argc, char **argv) return 1; } break; + case 'I': + master_prng = strtol(optarg, NULL, 0); + break; case 'h': print_help(); return 0; @@ -3294,6 +3296,7 @@ int main(int argc, char **argv) clients = nr_w_args; if (verbose > 1) { + printf("Random seed is %u.\n", master_prng); printf("Using %lu nop calibration for %uus delay.\n", nop_calibration, nop_calibration_us); printf("%u client%s.\n", clients, clients > 1 ? "s" : ""); @@ -3312,6 +3315,9 @@ int main(int argc, char **argv) } } + srand(master_prng); + master_prng = rand(); + if (master_workload >= 0 && clients == 1) master_workload = -1; |