Am 05.05.23 um 08:39 schrieb YuBiao Wang:
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>
Reviewed-by: Christian König <christian.koenig@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,
