On 10/08/18 04:01, Chris Wilson wrote:
Normally we wait on the last request, but that overlooks any
difficulties in waiting on a request while the next is being qeued.
/s/qeued/queued
Check those.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/gem_sync.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/tests/gem_sync.c b/tests/gem_sync.c
index c697220ad..fb209977d 100644
--- a/tests/gem_sync.c
+++ b/tests/gem_sync.c
@@ -294,6 +294,74 @@ wakeup_ring(int fd, unsigned ring, int timeout, int wlen)
igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
}
+ intel_detect_and_clear_missed_interrupts(fd);
+ igt_fork(child, num_engines) {
+ double start, end, elapsed;
+ unsigned long cycles;
+ igt_spin_t *spin[2];
+ uint32_t cmd;
+
+ spin[0] = __igt_spin_batch_new(fd,
+ .engine = ring,
+ .flags = IGT_SPIN_FAST);
+ cmd = *spin[0]->batch;
+
+ spin[1] = __igt_spin_batch_new(fd,
+ .engine = ring,
+ .flags = IGT_SPIN_FAST);
+ igt_assert(*spin[1]->batch == cmd);
+
+ start = gettime();
+ end = start + timeout;
+ cycles = 0;
+ do {
+ for (int loop = 0; loop < 1024; loop++) {
+ igt_spin_t *s = spin[loop & 1];
+
+ igt_spin_batch_end(s);
+ gem_sync(fd, s->handle);
How does the test fail if the sync goes wrong? Hang detector on the
queued batch?
Antonio
+
+ *s->batch = cmd;
+ gem_execbuf(fd, &s->execbuf);
+ }
+ cycles += 1024;
+ } while ((elapsed = gettime()) < end);
+ igt_spin_batch_free(fd, spin[1]);
+ igt_spin_batch_free(fd, spin[0]);
+
+ igt_info("%s%sompleted %ld cycles: %.3f us\n",
+ names[child % num_engines] ?: "",
+ names[child % num_engines] ? " c" : "C",
+ cycles, (elapsed - start)*1e6/cycles);
+ }
+ igt_waitchildren_timeout(2*timeout, NULL);
+ igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
+}
+
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