Op 03-10-2024 om 18:12 schreef Antonino Maniscalco:
Add trace points corresponding to preemption being triggered and being
completed for latency measurement purposes.
Reviewed-by: Akhil P Oommen <quic_akhilpo@xxxxxxxxxxx>
Tested-by: Rob Clark <robdclark@xxxxxxxxx>
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> # on SM8650-QRD
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> # on SM8450-HDK
Signed-off-by: Antonino Maniscalco <antomani103@xxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/a6xx_preempt.c | 6 ++++++
drivers/gpu/drm/msm/msm_gpu_trace.h | 28 ++++++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_preempt.c b/drivers/gpu/drm/msm/adreno/a6xx_preempt.c
index 21e333cb6342d33425eb96f97bcc853e9b041b36..6803d5af60cc8fb0f2a52ee160ffdbf0e8ef0209 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_preempt.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_preempt.c
@@ -7,6 +7,7 @@
#include "a6xx_gpu.h"
#include "a6xx_gmu.xml.h"
#include "msm_mmu.h"
+#include "msm_gpu_trace.h"
/*
* Try to transition the preemption state from old to new. Return
@@ -174,6 +175,8 @@ void a6xx_preempt_irq(struct msm_gpu *gpu)
set_preempt_state(a6xx_gpu, PREEMPT_NONE);
+ trace_msm_gpu_preemption_irq(a6xx_gpu->cur_ring->id);
+
/*
* Retrigger preemption to avoid a deadlock that might occur when preemption
* is skipped due to it being already in flight when requested.
@@ -294,6 +297,9 @@ void a6xx_preempt_trigger(struct msm_gpu *gpu)
*/
ring->restore_wptr = false;
+ trace_msm_gpu_preemption_trigger(a6xx_gpu->cur_ring->id,
+ ring ? ring->id : -1);
+
There is no need for the ternary operator. "ring" should be non-NULL,
otherwise the code would have already crashed.
So the change can just be
trace_msm_gpu_preemption_trigger(a6xx_gpu->cur_ring->id, ring->id);
--
Kees
