linux-kernel - Re: [PATCH] Support for perf on AMD family17h processors

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Message-ID: <20161116173005.GW3142@twins.programming.kicks-ass.net>
Date:   Wed, 16 Nov 2016 18:30:05 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Janakarajan Natarajan <Janakarajan.Natarajan@....com>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: Re: [PATCH] Support for perf on AMD family17h processors

On Wed, Nov 16, 2016 at 11:01:53AM -0600, Janakarajan Natarajan wrote:
> This patch enables perf core PMU support for AMD family17h processors.
> In family17h, there is no PMC-event constraint. All events, irrespective
> of the type, can be measured using any of the performance counters.
> 

Is there a public document describing this thing about already?

> +	case 0x17:
> +		pr_cont("Fam17h ");
> +		/* In family 17h, there are no event constraints in the PMC hardware.
> +		 * We fallback to using default amd_get_event_constraints.
> +		 */
> +		break;

 http://lkml.kernel.org/r/CA+55aFyQYJerovMsSoSKS7PessZBr4vNp-3QUUwhqk4A4_jcbg@mail.gmail.com