linux-kernel - Re: [PATCH 3/4] perf/x86/mbm: Fix mbm counting when RMIDs are reused

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Message-ID: <20160425091656.GF3430@twins.programming.kicks-ass.net>
Date:	Mon, 25 Apr 2016 11:16:56 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vikas Shivappa <vikas.shivappa@...ux.intel.com>
Cc:	tony.luck@...el.com, ravi.v.shankar@...el.com,
	fenghua.yu@...el.com, vikas.shivappa@...el.com, x86@...nel.org,
	linux-kernel@...r.kernel.org, hpa@...or.com, tglx@...utronix.de,
	mingo@...nel.org, h.peter.anvin@...el.com
Subject: Re: [PATCH 3/4] perf/x86/mbm: Fix mbm counting when RMIDs are reused

On Fri, Apr 22, 2016 at 05:27:20PM -0700, Vikas Shivappa wrote:
> When multiple instances of perf reuse RMID, then we need to start
> counting for each instance rather than reporting the current RMID count.
> This patch adds a st_count(start count) per event to track the same.

what?