I accidentally noticed some inefficiencies on the job submit path which seemed
easy to address. CPU usage of the DRM scheduler submission thread:
before after
UnigineHeaven 2.3% 1.3%
vkgears vsync off 15% 12%
Gains are mostly due reduced hammering on the delayed worker rescheduling. Stock
profile of the scheduler thread otherwise looks like this:
20.25% [kernel] [k] __mod_timer
2.87% [kernel] [k] enqueue_timer
2.16% [kernel] [k] amdgpu_gfx_profile_ring_end_use
More pairs of eyes would be welcome to check I did not break something.
Cc: Alex Deucher <[email protected]>
Cc: Christian König <[email protected]>
Cc: Timur Kristóf <[email protected]>
Tvrtko Ursulin (3):
drm/amdgpu: Remove unused amdgpu_device_ip_is_hw
drm/amdgpu: Save some cycles on the job submission path
drm/amdgpu: Do not fiddle with the idle workers too much
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 11 +++++-----
drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c | 21 -------------------
drivers/gpu/drm/amd/amdgpu/amdgpu_ip.h | 2 --
drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c | 9 ++++----
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 12 +++++------
drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c | 12 +++++------
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 14 +++++--------
drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h | 8 ++++++-
10 files changed, 36 insertions(+), 57 deletions(-)
--
2.54.0
