[PATCH i-g-t] benchmarks/gem_wsim: Randomise random seed

Chris Wilson
2019-05-16T18:58:40Z

To avoid hitting the same rut on each benchmark run, start with a new
random seed. To allow hitting the same rut again, let it be specified
by the user.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
benchmarks/gem_wsim.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/benchmarks/gem_wsim.c b/benchmarks/gem_wsim.c
index 48568ce40..cf2a44746 100644
--- a/benchmarks/gem_wsim.c
+++ b/benchmarks/gem_wsim.c
@@ -2282,8 +2282,9 @@ int main(int argc, char **argv)
igt_require(fd);

init_clocks();
+ srand(time(NULL));

- while ((c = getopt(argc, argv, "hqv2RSHxGdc:n:r:w:W:a:t:b:p:")) != -1) {
+ while ((c = getopt(argc, argv, "hqv2RSHxGdc:n:r:w:W:a:t:b:p:s:")) != -1) {
switch (c) {
case 'W':
if (master_workload >= 0) {
@@ -2300,6 +2301,9 @@ int main(int argc, char **argv)
case 'p':
prio = atoi(optarg);
break;
+ case 's':
+ srand(atoi(optarg));
+ break;
case 'a':
if (append_workload_arg) {
if (verbose)
--
2.20.1