path: root/src
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authorKenneth Graunke <>2017-07-17 12:57:20 -0700
committerKenneth Graunke <>2017-07-22 19:34:42 -0700
commitbdae2ddff89004c199b71cb6a4a306dee616f7f9 (patch)
tree7ed9992f828a5b62fe42aee48e0e9b207c1ba20a /src
parent38e2142f392f9b6ac78eab72a1f92dd37553e1d8 (diff)
i965/bufmgr: Skip wait ioctl when not busy.
If the buffer is idle, we I915_GEM_WAIT will return immediately, so we may as well skip the ioctl altogether. We can't trust the "idle" flag for external buffers, but for most, it should be fine. Reviewed-by: Matt Turner <>
Diffstat (limited to 'src')
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_bufmgr.c b/src/mesa/drivers/dri/i965/brw_bufmgr.c
index fc2a2276236..5edf4626b4f 100644
--- a/src/mesa/drivers/dri/i965/brw_bufmgr.c
+++ b/src/mesa/drivers/dri/i965/brw_bufmgr.c
@@ -924,6 +924,10 @@ brw_bo_wait(struct brw_bo *bo, int64_t timeout_ns)
struct drm_i915_gem_wait wait;
int ret;
+ /* If we know it's idle, don't bother with the kernel round trip */
+ if (bo->idle && !bo->external)
+ return 0;
wait.bo_handle = bo->gem_handle;
wait.timeout_ns = timeout_ns;