From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
Subject: Re: perf stat: Doubt about stall cycle support
Date: Wed, 21 Mar 2012 10:24:28 -0600
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To: yipeng <yipeng@gmail.com>
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On 3/21/12 9:32 AM, yipeng wrote:
>
>     What does perf --version show?
>
>     Should be fixed by 2cee77c4505fc581f41b44e18ffc09__53b67a414c.
>
>     David
>
>
> I'm not sure what version that hash is. I'm using perf version
> 3.0.22. Is my version that too old?

That's a commit id for perf-stat to discriminate unsupported events from 
not counted events.

It was committed around 3.0 timeframe. Try compiling a newer version of 
perf and see if it addresses your concern.

David