kernel/drivers/gpu/drm/msm/msm_gpu_trace.h, branch linux-rolling-stable

drm/msm: Add an ftrace for gpu register access

2025-09-08T14:24:59Z

With IFPC, there is a probability of accessing a GX domain register when it is collapsed, which leads to gmu fence errors. To debug this, we need to trace every gpu register accesses and identify the one just before a gmu fence error. So, add an ftrace to track all gpu register accesses. Signed-off-by: Akhil P Oommen Patchwork: https://patchwork.freedesktop.org/patch/673366/ Signed-off-by: Rob Clark

drm/msm: Add mmu prealloc tracepoint

2025-07-05T00:48:38Z

So we can monitor how many pages are getting preallocated vs how many get used. Signed-off-by: Rob Clark Signed-off-by: Rob Clark Tested-by: Antonino Maniscalco Reviewed-by: Antonino Maniscalco Patchwork: https://patchwork.freedesktop.org/patch/661521/

drm/msm/a6xx: Add traces for preemption

2024-10-03T20:21:52Z

Add trace points corresponding to preemption being triggered and being completed for latency measurement purposes. Reviewed-by: Akhil P Oommen Tested-by: Rob Clark Tested-by: Neil Armstrong # on SM8650-QRD Tested-by: Neil Armstrong # on SM8550-QRD Tested-by: Neil Armstrong # on SM8450-HDK Signed-off-by: Antonino Maniscalco Patchwork: https://patchwork.freedesktop.org/patch/618026/ Signed-off-by: Rob Clark

drm/msm/gem: Evict active GEM objects when necessary

2022-08-27T16:32:45Z

If we are under enough memory pressure, we should stall waiting for active buffers to become idle in order to evict. v2: Check for __GFP_ATOMIC before blocking Signed-off-by: Rob Clark Patchwork: https://patchwork.freedesktop.org/patch/496135/ Link: https://lore.kernel.org/r/20220802155152.1727594-14-robdclark@gmail.com

drm/msm/gem: Consolidate shrinker trace

2022-08-27T16:32:45Z

Combine separate trace events for purge vs evict into one. When we add support for purging/evicting active buffers we'll just add more info into this one trace event, rather than adding a bunch more events. Signed-off-by: Rob Clark Patchwork: https://patchwork.freedesktop.org/patch/496133/ Link: https://lore.kernel.org/r/20220802155152.1727594-13-robdclark@gmail.com

drm/msm: Support evicting GEM objects to swap

2021-04-07T18:05:48Z

Now that tracking is wired up for potentially evictable GEM objects, wire up shrinker and the remaining GEM bits for unpinning backing pages of inactive objects. Disabled by default for now, with an 'enable_eviction' module param to enable so that we can get some more testing on the range of generations (and iommu pairings) supported. Signed-off-by: Rob Clark Link: https://lore.kernel.org/r/20210405174532.1441497-9-robdclark@gmail.com Signed-off-by: Rob Clark

drm/msm/gpu: Add suspend/resume tracepoints

2020-09-12T16:59:58Z

Signed-off-by: Rob Clark

drm/msm: Convert shrinker msgs to tracepoints

2020-09-09T22:25:54Z

This reduces the spam in dmesg when we start hitting the shrinker, and replaces it with something we can put on a timeline while profiling or debugging system issues. Signed-off-by: Rob Clark Reviewed-by: Jordan Crouse Reviewed-by: Kristian H. Kristensen

drm/msm/gpu: Add GPU freq_change traces

2020-09-09T22:25:53Z

Technically the GMU specific one is a bit redundant, but it was useful to track down a bug. Signed-off-by: Rob Clark Reviewed-by: Jordan Crouse

drm/msm: add atomic traces

2019-09-03T23:17:02Z

This was useful for debugging fps drops. I suspect it will be useful again. Signed-off-by: Rob Clark Reviewed-by: Sean Paul