[PATCH v1 0/3] coresight: Fix for snapshot mode

[Leo Yan]

Hi Denis,

On Sun, Jun 20, 2021 at 10:21:57PM -1000, Denis Nikitin wrote:

[...]

> > I'd like to leave patch 1/3 out, and resend it if we get conclusion.
> > At the meantime, @Denis, if you have observed any profiling result
> > (or profiling quality) difference caused by patch 1, the feedback would
> > be very valuable.
> 
> I evaluated AutoFDO profiles with benchmarks but I was only focused
> on the system-wide mode. And as I understood patch 1 fixes the issue
> in non system-wide mode.

Yes, patch 1 doesn't work for the system-wide mode.  In the system-wide
mode, CoreSight driver has its own reference counter to only allow the
last CPU to fill trace data to AUX buffer.

> Currently I'm OoO so I won't be able to do further evaluation.

No problem, thanks for the feedback!

Leo