From: Arjan van de Ven <arjan at linux.intel.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] [PATCH] Fix timer and work perf events timestamp tracing
Date: Wed, 05 Sep 2012 10:09:00 -0700 [thread overview]
Message-ID: <5047872C.1090608@linux.intel.com> (raw)
In-Reply-To: CA+Z25wUBxT1oCmRujQ6_nzbdSUvEmfVXoy=gxjo0Jgj-VsYxUQ@mail.gmail.com
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On 9/5/2012 9:56 AM, Rajagopal Venkat wrote:
>> measure1:
>> ev3.start
>> ev1.end <<<<<
>
> evX.end <<<<<
> These events are causing numbers to go wrong.
but out of a 20 second window.. this is a tiny tiny window...
if you see 100.1% I'd buy this reasoning.
but you're seeing much more than that.
>>
>> if so, then we're loosing events, which is no good. reporting less than 100%
>> is ok, but reporting less than real is not.
>
> I did thought of it. Yes, agree that, we are loosing events for which
> start timestamp
we can't lose those!
those are the events that give us the initial CPU frequency in the window etc....
next reply other threads:[~2012-09-05 17:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-05 17:09 Arjan van de Ven [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-09-06 13:51 [Powertop] [PATCH] Fix timer and work perf events timestamp tracing Arjan van de Ven
2012-09-06 13:42 Rajagopal Venkat
2012-09-05 18:06 Arjan van de Ven
2012-09-05 17:45 Rajagopal Venkat
2012-09-05 17:22 Arjan van de Ven
2012-09-05 17:19 Rajagopal Venkat
2012-09-05 16:56 Rajagopal Venkat
2012-09-05 15:12 Chris Ferron
2012-09-05 12:44 Sergey Senozhatsky
2012-09-05 11:28 Viresh Kumar
2012-09-05 10:22 Rajagopal Venkat
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