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

[Akhil P Oommen]

On Wed, Aug 21, 2024 at 04:34:15PM +0200, Antonino Maniscalco wrote:
> 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 at codeaurora.org>
> > > Signed-off-by: Antonino Maniscalco <antomani103 at gmail.com>
> > > ---
> > 
> > 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?
> 

Please check msm_file_private_set_sysprof().

-Akhil

> Best regards,
> -- 
> Antonino Maniscalco <antomani103 at gmail.com>
>