On 21/01/2019 22:21, Chris Wilson wrote:
The global seqno is defunct and so we have no meaningful indicator of
forward progress for an engine. You need to listen to the request
signaling tracepoints instead.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 2 --
drivers/gpu/drm/i915/i915_trace.h | 25 -------------------------
2 files changed, 27 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 5fd5080c4ccb..71d11dc2c235 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1209,8 +1209,6 @@ static void notify_ring(struct intel_engine_cs *engine)
wake_up_process(tsk);
rcu_read_unlock();
-
- trace_intel_engine_notify(engine, wait);
}
static void vlv_c0_read(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 33d90eca9cdd..cb5bc65d575d 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -750,31 +750,6 @@ trace_i915_request_out(struct i915_request *rq)
#endif
#endif
-TRACE_EVENT(intel_engine_notify,
- TP_PROTO(struct intel_engine_cs *engine, bool waiters),
- TP_ARGS(engine, waiters),
-
- TP_STRUCT__entry(
- __field(u32, dev)
- __field(u16, class)
- __field(u16, instance)
- __field(u32, seqno)
- __field(bool, waiters)
- ),
-
- TP_fast_assign(
- __entry->dev = engine->i915->drm.primary->index;
- __entry->class = engine->uabi_class;
- __entry->instance = engine->instance;
- __entry->seqno = intel_engine_get_seqno(engine);
- __entry->waiters = waiters;
- ),
-
- TP_printk("dev=%u, engine=%u:%u, seqno=%u, waiters=%u",
- __entry->dev, __entry->class, __entry->instance,
- __entry->seqno, __entry->waiters)
-);
-
DEFINE_EVENT(i915_request, i915_request_retire,
TP_PROTO(struct i915_request *rq),
TP_ARGS(rq)
I cannot decide if keeping what we can would make it useful. Certainly
not for debugging intel_engine_breadcrumbs_irq.. a sequence of
intel_engine_notify(dev, class, instance) -> dma_fence_signaled would be
a very unreliable trace of what engine actually executed something. What
do you think?
Regards,
Tvrtko
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