linux-kernel - Re: [PATCH v7 00/13] perf/x86/amd: Add AMD Fam19h Branch Sampling support

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Date:   Tue, 29 Mar 2022 14:58:11 -0700
From:   Stephane Eranian <eranian@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, kim.phillips@....com,
        acme@...hat.com, jolsa@...hat.com, songliubraving@...com,
        rafael@...nel.org, ravi.bangoria@....com, Sandipan.Das@....com
Subject: Re: [PATCH v7 00/13] perf/x86/amd: Add AMD Fam19h Branch Sampling support

On Fri, Mar 25, 2022 at 1:29 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Thu, Mar 24, 2022 at 10:31:38PM -0700, Stephane Eranian wrote:
> > On Thu, Mar 24, 2022 at 7:59 AM Peter Zijlstra <peterz@...radead.org> wrote:
> > >
> > > On Tue, Mar 22, 2022 at 03:15:04PM -0700, Stephane Eranian wrote:
> > > > V7 makes the following changes:
> > > >    - rebased to 5.17-rc8
> > > >    - Restrict BRS to be used only with RETIRED_TAKEN_BRANCH event in order to
> > > >      avoid adding more skid to other events in case that are monitored
> > > >      concurrently
> > > >    - fixed bugs in the perf tool enhanced error handling for IBS and BRS
> > >
> > > But afaict you failed to pick up the build fixes I did in my tree :/ Let
> > > me try and be careful preserving those while munging this in.
> >
> > Sorry. I missed that. I can resubmit if you prefer.
>
> Nah, fixed it up again.. Even converted to static_call() this time.
>
> Could you please test this branch?

Started testing. BRS does not come up so far. Let me debug this.

>
>   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/log/?h=perf/amd
>
> I've since done more Changelog edits, and I should do a comment with the
> static_call_mod() usage, but I think this ought to work.
>
> At least it now actually builds...