Hi Denis,

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

[...]

quoted

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