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| author | Monk Liu <Monk.Liu@amd.com> | 2020-07-27 15:20:12 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-08-04 17:27:29 -0400 |
| commit | a300de40f66b87fa90703c94ffb22917f98eb902 (patch) | |
| tree | e1690029e39055ed5af5896a15ede13c51eba6a0 /drivers/gpu/drm/amd/amdgpu/amdgpu.h | |
| parent | 9b856defbe355f886f99777e667506841bd267a8 (diff) | |
| download | lwn-a300de40f66b87fa90703c94ffb22917f98eb902.tar.gz lwn-a300de40f66b87fa90703c94ffb22917f98eb902.zip | |
drm/amdgpu: introduce a new parameter to configure how many KCQ we want(v5)
what:
the MQD's save and restore of KCQ (kernel compute queue)
cost lots of clocks during world switch which impacts a lot
to multi-VF performance
how:
introduce a paramter to control the number of KCQ to avoid
performance drop if there is no kernel compute queue needed
notes:
this paramter only affects gfx 8/9/10
v2:
refine namings
v3:
choose queues for each ring to that try best to cross pipes evenly.
v4:
fix indentation
some cleanupsin the gfx_compute_queue_acquire()
v5:
further fix on indentations
more cleanupsin gfx_compute_queue_acquire()
TODO:
in the future we will let hypervisor driver to set this paramter
automatically thus no need for user to configure it through
modprobe in virtual machine
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index e2eed5c630fc..75631b3396a3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -202,6 +202,7 @@ extern int amdgpu_si_support; #ifdef CONFIG_DRM_AMDGPU_CIK extern int amdgpu_cik_support; #endif +extern int amdgpu_num_kcq; #define AMDGPU_VM_MAX_NUM_CTX 4096 #define AMDGPU_SG_THRESHOLD (256*1024*1024) |