From: Corey Ashford <cjashfor@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Lin Ming <ming.m.lin@intel.com>, Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
Paul Mundt <lethal@linux-sh.org>,
"eranian@gmail.com" <eranian@gmail.com>,
"Gary.Mohr@Bull.com" <Gary.Mohr@bull.com>,
"arjan@linux.intel.com" <arjan@linux.intel.com>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
Paul Mackerras <paulus@samba.org>,
"David S. Miller" <davem@davemloft.net>,
Russell King <rmk+kernel@arm.linux.org.uk>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Will Deacon <will.deacon@arm.com>,
Maynard Johnson <mpjohn@us.ibm.com>, Carl Love <carll@us.ibm.com>,
"greg@kroah.com" <greg@kroah.com>,
Kay Sievers <kay.sievers@vrfy.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC][PATCH v2 11/11] perf top: demo of how to use the sysfs interface
Date: Thu, 20 May 2010 17:21:23 -0700 [thread overview]
Message-ID: <4BF5D203.7000007@linux.vnet.ibm.com> (raw)
In-Reply-To: <1274386126.1674.1637.camel@laptop>
On 5/20/2010 1:08 PM, Peter Zijlstra wrote:
> On Wed, 2010-05-19 at 18:33 -0700, Corey Ashford wrote:
>>
>> We also need to take into account event "attributes" - other data that
>> is needed to configure a specific event. For example, think about a
>> memory controller which has a PMU can count events in a particular
>> memory range; we need to be able to supply the memory range somehow,
>
> That's that perf_event_attr is for.
>
I think the issue is that what is stuffed into perf_event_attr's fields should be done in a way that userspace tools can figure out via attribute info which is in exported by the kernel via sysfs (or eventfs, etc.)
- Corey
prev parent reply other threads:[~2010-05-21 0:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-19 1:49 [RFC][PATCH v2 11/11] perf top: demo of how to use the sysfs interface Lin Ming
2010-05-19 18:18 ` Corey Ashford
2010-05-20 1:17 ` Lin Ming
2010-05-20 1:33 ` Corey Ashford
2010-05-20 2:08 ` Lin Ming
2010-05-20 8:27 ` Corey Ashford
2010-05-20 9:21 ` Lin Ming
2010-05-20 18:06 ` Corey Ashford
2010-05-20 20:08 ` Peter Zijlstra
2010-05-21 0:21 ` Corey Ashford [this message]
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