drm/i915: Add tracepoints to track a vm during its lifetime
- 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 <chris@chris-wilson.co.uk>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 7d32571..1fb0000 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -88,6 +88,7 @@
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#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 @@
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 @@
ctx->ppgtt = ppgtt;
}
+ trace_i915_context_create(ctx);
+
return ctx;
err_unpin:
@@ -549,6 +554,7 @@
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;