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| author | Chris Wilson | 2013-09-25 12:43:28 +0200 |
|---|---|---|
| committer | Daniel Vetter | 2013-10-01 07:45:24 +0200 |
| commit | b52b89da097896ac265d1f875aeb0bfd92a9dd38 (patch) | |
| tree | 16cb9ff966426839a8894ce0d974934ff878e7a0 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | drm/i915: Show WT caching in debugfs (diff) | |
| download | kernel-qcow2-linux-b52b89da097896ac265d1f875aeb0bfd92a9dd38.tar.gz kernel-qcow2-linux-b52b89da097896ac265d1f875aeb0bfd92a9dd38.tar.xz kernel-qcow2-linux-b52b89da097896ac265d1f875aeb0bfd92a9dd38.zip | |
drm/i915: Add a tracepoint for using a semaphore
So that we can find the callers who introduce a ring stall. A single
ring stall is not too unwelcome, the right issue becomes when they start
to interlock and prevent any concurrent work. That, however, is a little
tricker to detect with a mere tracepoint!
v2: Rebrand it as a ring event, rather than an object event.
v3: Include the seqno in the tracepoint for posterity or something.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 1a0b74d56cd7..3ae925b0045f 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2625,6 +2625,7 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj, if (ret) return ret; + trace_i915_gem_ring_sync_to(from, to, seqno); ret = to->sync_to(to, from, seqno); if (!ret) /* We use last_read_seqno because sync_to() |