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drm/amdkfd: Add eviction debug messages

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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>
This commit is contained in:
Felix Kuehling
2020-06-11 23:19:37 -04:00
committed by Alex Deucher
parent e3569fab49
commit b205795677
5 changed files with 20 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@@ -186,8 +186,10 @@ extern int amdgpu_noretry;
extern int amdgpu_force_asic_type;
#ifdef CONFIG_HSA_AMD
extern int sched_policy;
extern bool debug_evictions;
#else
static const int sched_policy = KFD_SCHED_POLICY_HWS;
static const bool debug_evictions; /* = false */
#endif
extern int amdgpu_tmz;