linux-kernel - Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination with perf

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Message-ID: <20180802123923.GJ2530@hirez.programming.kicks-ass.net>
Date:   Thu, 2 Aug 2018 14:39:23 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Reinette Chatre <reinette.chatre@...el.com>
Cc:     tglx@...utronix.de, mingo@...hat.com, fenghua.yu@...el.com,
        tony.luck@...el.com, vikas.shivappa@...ux.intel.com,
        gavin.hindman@...el.com, jithu.joseph@...el.com,
        dave.hansen@...el.com, hpa@...or.com, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination
 with perf

On Tue, Jul 31, 2018 at 12:38:27PM -0700, Reinette Chatre wrote:
> Dear Maintainers,
> 
> The success of Cache Pseudo-Locking can be measured via the use of
> performance events. Specifically, the number of cache hits and misses
> reading a memory region after it has been pseudo-locked to cache. This
> measurement is triggered via the resctrl debugfs interface.
> 
> To ensure most accurate results the performance counters and their
> configuration registers are accessed directly.

NAK on that.