linux-kernel - Re: [PATCH 1/2] perf, x86: Use INST_RETIRED.TOTAL_CYCLES

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Message-ID: <20151201131925.GM3816@twins.programming.kicks-ass.net>
Date:	Tue, 1 Dec 2015 14:19:25 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/2] perf, x86: Use INST_RETIRED.TOTAL_CYCLES_PS for
 cycles:pp for Skylake

On Mon, Nov 30, 2015 at 04:28:08PM -0800, Andi Kleen wrote:
> +	/* INST_RETIRED.TOTAL_CYCLES_PS (inv=1, cmask=16) (cycles:p). */
> +	INTEL_FLAGS_EVENT_CONSTRAINT(0x108000c0, 0x01),

Hmm, so this event is still limited to a single counter. Better than
nothing I suppose.

Thanks!
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