diff options
| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2020-06-11 23:19:37 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-07-01 01:59:21 -0400 |
| commit | b205795677c034a1975e75a466ad158950fde4b4 (patch) | |
| tree | 131a04e30eb868e0ff6c925631d7c500f8a65c69 /drivers/gpu/drm/amd/amdkfd | |
| parent | e3569fab49886123c81f18d675fb1719d73cf27d (diff) | |
| download | linux-stable-b205795677c034a1975e75a466ad158950fde4b4.tar.gz linux-stable-b205795677c034a1975e75a466ad158950fde4b4.tar.bz2 linux-stable-b205795677c034a1975e75a466ad158950fde4b4.zip | |
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_device.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 5 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c index 314c4b99671d..7f6d0958ed62 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c @@ -935,6 +935,7 @@ int kgd2kfd_quiesce_mm(struct mm_struct *mm) if (!p) return -ESRCH; + WARN(debug_evictions, "Evicting pid %d", p->lead_thread->pid); r = kfd_process_evict_queues(p); kfd_unref_process(p); @@ -1002,6 +1003,8 @@ int kgd2kfd_schedule_evict_and_restore_process(struct mm_struct *mm, /* During process initialization eviction_work.dwork is initialized * to kfd_evict_bo_worker */ + WARN(debug_evictions, "Scheduling eviction of pid %d in %ld jiffies", + p->lead_thread->pid, delay_jiffies); schedule_delayed_work(&p->eviction_work, delay_jiffies); out: kfd_unref_process(p); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 3a4fbb6a9aca..308e96f1dab5 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -177,6 +177,11 @@ extern bool hws_gws_support; */ extern int queue_preemption_timeout_ms; +/* + * Enable eviction debug messages + */ +extern bool debug_evictions; + enum cache_policy { cache_policy_coherent, cache_policy_noncoherent |