The number of kernel queues has impact on the latency under sriov usecase. So to reduce the latency we set the default num_kcq = 2 under sriov if not set manually. Signed-off-by: YuBiao Wang <YuBiao.Wang@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 1311e42ab8e9..d0ad7cb0fa05 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -68,6 +68,9 @@ void amdgpu_virt_init_setting(struct amdgpu_device *adev) /* enable mcbp for sriov */ amdgpu_mcbp = 1; + /* Reduce kcq number to 2 to reduce latency */ + if (amdgpu_num_kcq == -1) + amdgpu_num_kcq = 2; } void amdgpu_virt_kiq_reg_write_reg_wait(struct amdgpu_device *adev, -- 2.25.1
