Re: [PATCH 4/7] drm/msm/A6xx: Implement preemption for A7XX targets

[Antonino Maniscalco]

On 8/19/24 10:08 PM, Akhil P Oommen wrote:
> On Thu, Aug 15, 2024 at 08:26:14PM +0200, Antonino Maniscalco wrote:
> > This patch implements preemption feature for A6xx targets, this allows
> > the GPU to switch to a higher priority ringbuffer if one is ready. A6XX
> > hardware as such supports multiple levels of preemption granularities,
> > ranging from coarse grained(ringbuffer level) to a more fine grained
> > such as draw-call level or a bin boundary level preemption. This patch
> > enables the basic preemption level, with more fine grained preemption
> > support to follow.
> >
> > Signed-off-by: Sharat Masetty <smasetty@xxxxxxxxxxxxxx>
> > Signed-off-by: Antonino Maniscalco <antomani103@xxxxxxxxx>
> > ---
>
> No postamble packets which resets perfcounters? It is necessary. Also, I
> think we should disable preemption during profiling like we disable slumber.
>
> -Akhil.

You mention that we disable slumber during profiling however I wasn't 
able to find code doing that. Can you please clarify which code you are 
referring to or a mechanism through which the kernel can know when we 
are profiling?

Best regards,
--
Antonino Maniscalco <antomani103@xxxxxxxxx>