linux-kernel - Re: [PATCH V4 07/14] perf/x86/intel: Support hardware TopDown metrics

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Message-ID: <20190930181831.GC8560@tassilo.jf.intel.com>
Date:   Mon, 30 Sep 2019 11:18:31 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, acme@...nel.org,
        mingo@...hat.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
        jolsa@...nel.org, eranian@...gle.com,
        alexander.shishkin@...ux.intel.com
Subject: Re: [PATCH V4 07/14] perf/x86/intel: Support hardware TopDown metrics

> Andi, what do you think? Will it be a problem for RDPMC users?

Should be fine.

RDPMC users only need slots anyways, as they managed RDPMC on their own.

We can document it in the documentation. And they will see an 
error if they only enable a metrics event.

-Andi