From b205795677c034a1975e75a466ad158950fde4b4 Mon Sep 17 00:00:00 2001 From: Felix Kuehling <Felix.Kuehling@amd.com> Date: Thu, 11 Jun 2020 23:19:37 -0400 Subject: drm/amdkfd: Add eviction debug messages Use WARN to print messages with backtrace when evictions are triggered. This can help determine the root cause of evictions and help spot driver bugs triggering evictions unintentionally, or help with performance tuning by avoiding conditions that cause evictions in a specific workload. The messages are controlled by a new module parameter that can be changed at runtime: echo Y > /sys/module/amdgpu/parameters/debug_evictions echo N > /sys/module/amdgpu/parameters/debug_evictions Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Philip Yang <Philip.Yang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c index b87ca171986a..072f0e1185a8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c @@ -275,6 +275,8 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync, continue; } + WARN(debug_evictions && fence_owner == AMDGPU_FENCE_OWNER_KFD, + "Adding eviction fence to sync obj"); r = amdgpu_sync_fence(sync, f, false); if (r) break; -- cgit v1.2.3-70-g09d2