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Re: [PATCH] perf record: enable multiplexing scaling via -R

From Andi Kleen <andi@firstfloor.org>
Newsgroups linux.kernel
Subject Re: [PATCH] perf record: enable multiplexing scaling via -R
Date 2017-08-22 03:30 +0200
Message-ID <uh6b0-3Bo-13@gated-at.bofh.it> (permalink)
References <uh0oV-8mG-13@gated-at.bofh.it> <uh3Zv-2fV-9@gated-at.bofh.it> <uh55f-2TV-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote:
> On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen <andi@firstfloor.org> wrote:
> >
> > Stephane Eranian <eranian@google.com> writes:
> > >
> > > To activate, the user must use:
> > > $ perf record -a -R ....
> >
> > I don't know why you're overloading the existing raw mode?
> >
> > It has nothing to do with that.
> >
> I explained this in the changelog. So that is does not change any of
> the processing in perf report, i.e., no faced with data it does not
> know how to handle.
> Also trying to avoid adding yet another option.

But raw is needed for some of the non Intel PMUs. I believe it's 
the only way to use AMD IBS. You may as well break their usage.

You'll need a new option.

-Andi

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Thread

[PATCH] perf record: enable multiplexing scaling via -R Stephane Eranian <eranian@google.com> - 2017-08-21 21:20 +0200
  Re: [PATCH] perf record: enable multiplexing scaling via -R Andi Kleen <andi@firstfloor.org> - 2017-08-22 01:10 +0200
    Re: [PATCH] perf record: enable multiplexing scaling via -R Stephane Eranian <eranian@google.com> - 2017-08-22 02:20 +0200
      Re: [PATCH] perf record: enable multiplexing scaling via -R Andi Kleen <andi@firstfloor.org> - 2017-08-22 03:30 +0200
        Re: [PATCH] perf record: enable multiplexing scaling via -R Jiri Olsa <jolsa@redhat.com> - 2017-08-22 09:10 +0200
          Re: [PATCH] perf record: enable multiplexing scaling via -R Stephane Eranian <eranian@google.com> - 2017-08-22 09:30 +0200

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