diff options
Diffstat (limited to 'tests/kms_vblank.c')
| -rw-r--r-- | tests/kms_vblank.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/tests/kms_vblank.c b/tests/kms_vblank.c index babef39d0..8076e136c 100644 --- a/tests/kms_vblank.c +++ b/tests/kms_vblank.c @@ -283,7 +283,16 @@ static void vblank_query(data_t *data, int fd, int nchildren) vbl.request.sequence = 0; igt_assert_eq(wait_vblank(fd, &vbl), 0); count++; - } while ((vbl.reply.sequence - sq) <= 120); + + /* + * break the loop and fail after 10 seconds to prevent hang. + * Ideally, it should take only 2 seconds for 120 vblank in 60 fps. + */ + clock_gettime(CLOCK_MONOTONIC, &end); + igt_assert_f(end.tv_sec - start.tv_sec < 10, + "VBlank Sequence number increased by only %lu in %lu seconds.\n", + vbl.reply.sequence - sq, end.tv_sec - start.tv_sec); + } while (vbl.reply.sequence <= (sq + 120)); clock_gettime(CLOCK_MONOTONIC, &end); igt_info("Time to query current counter (%s): %7.3fµs\n", |