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tests/gem_reset_stats: add defer-hangcheck test

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to see if one can fool hangcheck by keeping non hanging
ring busy

v2: break from loop instead of return (Daniel Vetter)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Mika Kuoppala 2014-11-07 15:33:34 +02:00
parent c049c39f35
commit 50d539efeb
1 changed files with 43 additions and 0 deletions
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43
tests/gem_reset_stats.c
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@ -1019,6 +1019,45 @@ static void test_params(void)
}
static void defer_hangcheck(int ring_num)
{
int fd, count_start, count_end;
int seconds = 30;
const struct target_ring *next_ring;
fd = drm_open_any();
igt_assert(fd >= 0);
do {
next_ring = &rings[(++ring_num) % NUM_RINGS];
if (next_ring->present(fd))
break;
} while(next_ring != current_ring);
igt_skip_on(next_ring == current_ring);
count_start = get_reset_count(fd, 0);
igt_assert(count_start >= 0);
igt_assert(inject_hang_ring(fd, 0, current_ring->exec, true));
while (--seconds) {
igt_assert(exec_valid_ring(fd, 0, next_ring->exec));
count_end = get_reset_count(fd, 0);
igt_assert(count_end >= 0);
if (count_end > count_start)
break;
sleep(1);
}
igt_assert(count_end > count_start);
close(fd);
}
static bool gem_has_hw_contexts(int fd)
{
struct local_drm_i915_gem_context_create create;
@ -1159,5 +1198,9 @@ igt_main
igt_subtest_f("close-pending-fork-reverse-%s", name)
RUN_TEST(test_close_pending_fork(true));
igt_subtest_f("defer-hangcheck-%s", name)
RUN_TEST(defer_hangcheck(i));
}
}