linux-kernel - Re: [RFC][PATCH 3/9] perf: export registerred pmus via sysfs

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Message-Id: <1273490284.15998.105.camel@minggr.sh.intel.com>
Date:	Mon, 10 May 2010 19:18:04 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Paul Mundt <lethal@...ux-sh.org>, Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"eranian@...il.com" <eranian@...il.com>,
	"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 3/9] perf: export registerred pmus via sysfs

On Mon, 2010-05-10 at 19:11 +0800, Lin Ming wrote:
> On Mon, 2010-05-10 at 19:04 +0800, Peter Zijlstra wrote:
> > On Mon, 2010-05-10 at 18:58 +0800, Lin Ming wrote:
> > > Take Nehalem core and uncore pmu as an example,
> > > 
> > > core pmu sits under /sys/devices/system/cpu/cpuN/pmu_id with ID 0,
> > > 
> > > But uncore pmu is shared by cpus within package, where should it sit
> > > under? 
> > 
> > I already gave you the answer to that:
> > 
> >  /sys/devices/system/cpu/cpuN/nodeN/
> > 
> > the uncore pmu is the memory controller (aka node) pmu.
> 
> Ah, much clear now.
> 
> perf_event_register_pmu needs another paramter, like
> 
> perf_event_register_pmu(struct pmu *pmu, int pmu_type);

Or just put this "pmu_type" into struct pmu?

> 
> Thanks.

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