[PATCH 3/3] drm/amdgpu: Set lower queue retry timeout for gfx9 family

[Jay Cornwall]

On 2/6/2025 16:27, Russell, Kent wrote:

> [AMD Official Use Only - AMD Internal Distribution Only]
> 
> Ping (plus Jay)

Sorry, I'd need the whole patch chain to review.

As a general comment CP_IQ_WAIT_TIME2.QUE_SLEEP is tangential to 
SCH_WAVE. I'm not sure it's useful to tie these together.

SCH_WAVE is lowered when a debugger attaches to reduce context switching 
latency, which it triggers at a high frequency. Higher latency (the 
default) is desirable in normal use to allow short-running wavefronts to 
complete rather than taking the slow save path.

QUE_SLEEP controls the interval between checks for unmet conditions 
(e.g. WAIT_REG_MEM or CUs fully occupied). On contemporary ASICs it's 
best to minimize this by default. The cost is additional bandwidth 
consumed by CP when polling memory, but it's not substantial.