[PATCH 1/1] drm/amdgpu: disable gpu-sched load balance for uvd_enc

[Nirmoy]

Hi Alex,


If possible, please squash this with:


commit e0300ed8820d19fe108006cf1b69fa26f0b4e3fc

drm/amdgpu: disable gpu-sched load balance for uvd


Regards,

Nirmoy

On 9/2/20 1:07 PM, Christian König wrote:
> Am 02.09.20 um 12:15 schrieb Nirmoy Das:
>> On hardware with multiple uvd instances, dependent uvd_enc jobs
>> may get scheduled to different uvd instances. Because uvd_enc
>> jobs retain hw context, dependent jobs should always run on the
>> same uvd instance. This patch disables GPU scheduler's load balancer
>> for a context that binds jobs from the same context to a uvd
>> instance.
>>
>> Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
>
> Reviewed-by: Christian König <christian.koenig at amd.com>
>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
>> index 7cd398d25498..c80d8339f58c 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
>> @@ -114,8 +114,10 @@ static int amdgpu_ctx_init_entity(struct 
>> amdgpu_ctx *ctx, u32 hw_ip,
>>       scheds = adev->gpu_sched[hw_ip][hw_prio].sched;
>>       num_scheds = adev->gpu_sched[hw_ip][hw_prio].num_scheds;
>>
>> +    /* disable load balance if the hw engine retains context among 
>> dependent jobs */
>>       if (hw_ip == AMDGPU_HW_IP_VCN_ENC ||
>>           hw_ip == AMDGPU_HW_IP_VCN_DEC ||
>> +        hw_ip == AMDGPU_HW_IP_UVD_ENC ||
>>           hw_ip == AMDGPU_HW_IP_UVD) {
>>           sched = drm_sched_pick_best(scheds, num_scheds);
>>           scheds = &sched;
>> -- 
>> 2.28.0
>>
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