This patch adds a test that will trigger a preemption of a low priority batch by a 'bad' batch buffer which will hang. The test aims at making sure that a hanging high priority batch will not disrupt the submission flow of low priority contexts.
Cc: Chris Wilson <[email protected]> Cc: Michal Winiarski <[email protected]> Signed-off-by: Antonio Argenziano <[email protected]> --- tests/gem_exec_schedule.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/tests/gem_exec_schedule.c b/tests/gem_exec_schedule.c index ae44a6c0..5a4d63f9 100644 --- a/tests/gem_exec_schedule.c +++ b/tests/gem_exec_schedule.c @@ -511,6 +511,39 @@ static void preempt_self(int fd, unsigned ring) gem_close(fd, result); } +static void bad_preemptive(int fd, unsigned ring) +{ + igt_spin_t *spin[16]; + igt_spin_t *bad; + uint32_t ctx[2]; + + ctx[LO] = gem_context_create(fd); + gem_context_set_priority(fd, ctx[LO], MIN_PRIO); + + ctx[HI] = gem_context_create(fd); + gem_context_set_priority(fd, ctx[HI], MAX_PRIO); + + for (int n = 0; n < 16; n++) { + gem_context_destroy(fd, ctx[LO]); + ctx[LO] = gem_context_create(fd); + gem_context_set_priority(fd, ctx[LO], MIN_PRIO); + + spin[n] = __igt_spin_batch_new(fd, ctx[LO], ring, 0, true); + igt_debug("spin[%d].handle=%d\n", n, spin[n]->handle); + } + + bad = igt_spin_batch_new(fd, ctx[HI], ring, 0, false); + gem_wait(fd, bad->handle, NULL); + + for (int n = 0; n < 16; n++) { + igt_assert(gem_bo_busy(fd, spin[n]->handle)); + igt_spin_batch_free(fd, spin[n]); + } + + gem_context_destroy(fd, ctx[LO]); + gem_context_destroy(fd, ctx[HI]); +} + static void deep(int fd, unsigned ring) { #define XS 8 @@ -1033,6 +1066,12 @@ igt_main preempt(fd, e->exec_id | e->flags, NEW_CTX | HANG_LP); igt_fork_hang_detector(fd); } + + igt_subtest_f("bad-preemptive-%s", e->name) { + igt_stop_hang_detector(); + bad_preemptive(fd, e->exec_id | e->flags); + igt_fork_hang_detector(fd); + } } igt_subtest_f("deep-%s", e->name) -- 2.14.2 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
