From: Daniele Ceraolo Spurio
- ppgtt init/release: these tracepoints are useful for observing the
creation and destruction of Full PPGTTs.
- ctx create/free: we can use the ctx_free trace in combination with the
ppgtt_release one to be sure that the ppgtt doesn't stay alive for too
long after the ctx is destroyed. ctx_create is there for simmetry
- switch_mm: important point in the lifetime of the vm
v4: add DOC information
v5: pull the DOC in drm.tmpl
v6: clean ppgtt init/release traces + add ctx create/free and switch_mm
tracepoints (Chris)
v7: drop execlist_submit_context tracepoint
Cc: Chris Wilson
Signed-off-by: Daniele Ceraolo Spurio
Reviewed-by: Chris Wilson
---
Documentation/DocBook/drm.tmpl | 21 +++
drivers/gpu/drm/i915/i915_gem_context.c | 6 ++
drivers/gpu/drm/i915/i915_gem_gtt.c | 4 ++
drivers/gpu/drm/i915/i915_trace.h | 104
4 files changed, 135 insertions(+)
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index 7277a7f..0f485a0 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -3994,6 +3994,27 @@ int num_ioctls;
!Idrivers/gpu/drm/i915/intel_lrc.c
+
+
+ Tracing
+
+This sections covers all things related to the tracepoints implemented in
+the i915 driver.
+
+
+ i915_ppgtt_create and i915_ppgtt_release
+!Pdrivers/gpu/drm/i915/i915_trace.h i915_ppgtt_create and i915_ppgtt_release
tracepoints
+
+
+ i915_context_create and i915_context_free
+!Pdrivers/gpu/drm/i915/i915_trace.h i915_context_create and i915_context_free
tracepoints
+
+
+ switch_mm
+!Pdrivers/gpu/drm/i915/i915_trace.h switch_mm tracepoint
+
+
+
!Cdrivers/gpu/drm/i915/i915_irq.c
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
b/drivers/gpu/drm/i915/i915_gem_context.c
index 7d32571..1fb 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -88,6 +88,7 @@
#include
#include
#include "i915_drv.h"
+#include "i915_trace.h"
/* This is a HW constraint. The value below is the largest known requirement
* I've seen in a spec to date, and that was a workaround for a non-shipping
@@ -137,6 +138,8 @@ void i915_gem_context_free(struct kref *ctx_ref)
struct intel_context *ctx = container_of(ctx_ref,
typeof(*ctx), ref);
+ trace_i915_context_free(ctx);
+
if (i915.enable_execlists)
intel_lr_context_free(ctx);
@@ -274,6 +277,8 @@ i915_gem_create_context(struct drm_device *dev,
ctx->ppgtt = ppgtt;
}
+ trace_i915_context_create(ctx);
+
return ctx;
err_unpin:
@@ -549,6 +554,7 @@ static int do_switch(struct intel_engine_cs *ring,
from = ring->last_context;
if (to->ppgtt) {
+ trace_switch_mm(ring, to);
ret = to->ppgtt->switch_mm(to->ppgtt, ring);
if (ret)
goto unpin_out;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
b/drivers/gpu/drm/i915/i915_gem_gtt.c
index c1cf332..7737e55 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1174,6 +1174,8 @@ i915_ppgtt_create(struct drm_device *dev, struct
drm_i915_file_private *fpriv)
ppgtt->file_priv = fpriv;
+ trace_i915_ppgtt_create(&ppgtt->base);
+
return ppgtt;
}
@@ -1182,6 +1184,8 @@ void i915_ppgtt_release(struct kref *kref)
struct i915_hw_ppgtt *ppgtt =
container_of(kref, struct i915_hw_ppgtt, ref);
+ trace_i915_ppgtt_release(&ppgtt->base);
+
/* vmas should already be unbound */
WARN_ON(!list_empty(&ppgtt->base.active_list));
WARN_ON(!list_empty(&ppgtt->base.inactive_list));
diff --git a/drivers/gpu/drm/i915/i915_trace.h
b/drivers/gpu/drm/i915/i915_trace.h
index f5aa006..751d4ad 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -587,6 +587,110 @@ TRACE_EVENT(intel_gpu_freq_change,
TP_printk("new_freq=%u", __entry->freq)
);
+/**
+ * DOC: i915_ppgtt_create and i915_ppgtt_release tracepoints
+ *
+ * With full ppgtt enabled each process using drm will allocate at least one
+ * translation table. With these traces it is possible to keep track of the
+ * allocation and of the lifetime of the tables; this can be used during
+ * testing/debug to verify that we are not leaking ppgtts.
+ * These traces identify the ppgtt through the vm pointer, which is also
printed
+ * by the i915_vma_bind and i915_vma_unbind tracepoints.
+ */
+DECLARE_EVENT_CLASS(i915_ppgtt,
+ TP_PROTO(struct i915_address_space *vm),
+ TP_ARGS(vm),
+
+ TP_STRUCT__entry(
+ __field(struct i915_address_space *, vm)
+ __field(u32, dev)
+ ),
+
+ TP_fas
