linux-kernel - Re: [PATCH 3/3] x86, perf: Add PEBS frontend profiling for Skylake

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Message-ID: <20150717200900.GE7380@tassilo.jf.intel.com>
Date:	Fri, 17 Jul 2015 13:09:00 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] x86, perf: Add PEBS frontend profiling for Skylake

> I believe this mask of 0x3fff17 is wrong and should instead be
> 0x7fffff based on the description of the FRONTEND
> MSR I see in the SDM Table 18-54 (bit 0-22 are valid). Otherwise, some
> valid latency values may be rejected.

No, my mask is correct.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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