[PATCH 08/13] drm/i915: Add pin count trace point

ville.syrjala
2012-11-16T14:22:20Z

A new trace point for tracking changes to gem object pin count.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 6 ++++++
drivers/gpu/drm/i915/i915_trace.h | 19 +++++++++++++++++++
2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5158461..0bfc8af 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3466,6 +3466,8 @@ i915_gem_object_pin(struct drm_i915_gem_object *obj,
if (!obj->has_global_gtt_mapping && map_and_fenceable)
i915_gem_gtt_bind_object(obj, obj->cache_level);

+ trace_i915_gem_object_pin_count(obj, obj->pin_count, obj->pin_count + 1);
+
obj->pin_count++;
obj->pin_mappable |= map_and_fenceable;

@@ -3475,6 +3477,8 @@ i915_gem_object_pin(struct drm_i915_gem_object *obj,
void
i915_gem_object_unpin(struct drm_i915_gem_object *obj)
{
+ trace_i915_gem_object_pin_count(obj, obj->pin_count, obj->pin_count - 1);
+
BUG_ON(obj->pin_count == 0);
BUG_ON(obj->gtt_space == NULL);

@@ -3753,6 +3757,8 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj)
if (obj->phys_obj)
i915_gem_detach_phys_object(dev, obj);

+ trace_i915_gem_object_pin_count(obj, obj->pin_count, 0);
+
obj->pin_count = 0;
if (WARN_ON(i915_gem_object_unbind(obj) == -ERESTARTSYS)) {
bool was_interruptible;
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 3db4a68..44f8d40 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -16,6 +16,25 @@

/* object tracking */

+TRACE_EVENT(i915_gem_object_pin_count,
+ TP_PROTO(struct drm_i915_gem_object *obj, u32 pin_count_pre, u32 pin_count_post),
+ TP_ARGS(obj, pin_count_pre, pin_count_post),
+
+ TP_STRUCT__entry(
+ __field(struct drm_i915_gem_object *, obj)
+ __field(u32, pin_count_pre)
+ __field(u32, pin_count_post)
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj;
+ __entry->pin_count_pre = pin_count_pre;
+ __entry->pin_count_post = pin_count_post;
+ ),
+
+ TP_printk("obj=%p, pin_count=%u->%u", __entry->obj, __entry->pin_count_pre, __entry->pin_count_post)
+);
+
TRACE_EVENT(i915_gem_object_create,
TP_PROTO(struct drm_i915_gem_object *obj),
TP_ARGS(obj),
--
1.7.8.6

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