drm/amdgpu: Improve MES responsiveness during oversubscription

When MES is oversubscribed it may not frequently check for new
command submissions from driver if the scheduling load is high.
Response latency as high as 5 seconds has been observed.

Enable a flag which adds a check for new commands between
scheduling quantums.

Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Cc: Alexandru Tudor <alexandru.tudor@amd.com>
Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 4a3020b5b30f97bee61da5dd1837de673e36676a..31b26e6f0b30fecd07e8e5d0994f4c760f78f941 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -406,6 +406,7 @@ static int mes_v11_0_set_hw_resources(struct amdgpu_mes *mes)
        mes_set_hw_res_pkt.disable_mes_log = 1;
        mes_set_hw_res_pkt.use_different_vmid_compute = 1;
        mes_set_hw_res_pkt.enable_reg_active_poll = 1;
+       mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
        mes_set_hw_res_pkt.oversubscription_timer = 50;
 
        return mes_v11_0_submit_pkt_and_poll_completion(mes,