Re: [Powertop] [PATCH] Fix timer and work perf events timestamp tracing
Arjan van de Ven <arjan at linux.intel.com> Wed, 05 Sep 2012 10:09:00 -0700
| Newsgroups | dev.linux.lists.powertop |
|---|---|
| Message-ID | <[email protected]> |
--===============3441857747546985584== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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 e= tc.... --===============3441857747546985584==--