[Intel-gfx] [PATCH i-g-t] lib/i915: Bump conservative threshold for ring size

[Chris Wilson]

We are still hitting the occasional stall upon submission, so be extra
caution and leave one more spare.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/i915/gem_ring.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/i915/gem_ring.c b/lib/i915/gem_ring.c
index 272264659..9f099edff 100644
--- a/lib/i915/gem_ring.c
+++ b/lib/i915/gem_ring.c
@@ -104,7 +104,7 @@ __gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags
 	} while (1);
 
 	igt_assert_eq(__execbuf(fd, &execbuf), -EINTR);
-	igt_assert(count > 1);
+	igt_assert(count > 2);
 
 	memset(&itv, 0, sizeof(itv));
 	setitimer(ITIMER_REAL, &itv, NULL);
@@ -120,7 +120,7 @@ __gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags
 	gem_quiescent_gpu(fd);
 
 	/* Be conservative in case we must wrap later */
-	return count - 1;
+	return count - 2;
 }
 
 /**
-- 
2.23.0