Re: [RFC][PATCH v2 11/11] perf top: demo of how to use the sysfsinterface

From: Corey Ashford
Date: Thu May 20 2010 - 20:21:41 EST

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

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