[Intel-gfx] [PATCH igt] igt/gem_ctx_switch: Do a warmup pass over all contexts

[Chris Wilson]

Ensure that we always use every context at least once before we start
running the stress-test.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/gem_ctx_switch.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/gem_ctx_switch.c b/tests/gem_ctx_switch.c
index fdd67202..159554e5 100644
--- a/tests/gem_ctx_switch.c
+++ b/tests/gem_ctx_switch.c
@@ -115,6 +115,13 @@ static void single(int fd, uint32_t handle,
 		struct timespec start, now;
 		unsigned int count = 0;
 
+		/* Warmup */
+		for (int i = 0; i < ARRAY_SIZE(contexts); i++) {
+			execbuf.rsvd1 = contexts[i];
+			gem_execbuf(fd, &execbuf);
+		}
+		gem_sync(fd, handle);
+
 		clock_gettime(CLOCK_MONOTONIC, &start);
 		do {
 			igt_while_interruptible(flags & INTERRUPTIBLE) {
-- 
2.15.0