Hi Mark, We've done some more digging and have found that mpstat using a different approach to calc usage, whilst top doesn't.
With top we see this issue as well, so its not a collect issue per se. So for the moment I think this can be parked. Thanks, Jon -----Original Message----- From: Mark Seger [mailto:[email protected]] Sent: 27 March 2013 18:00 To: Kent, Jonathan D Cc: [email protected] Subject: Re: [Collectl-interest] 0% Idle shown occasionally that's certainly a new one for me. can you run collectl for a small number of samples, let's say 10, and play it back and still see 0s? if could you send me the raw file and I'll take a closer look at the data? also, if you were to run 'collectl -sc -d4', it will print out what it's reading from /proc/stat during each interval which may provide additional clues -mark On Wed, Mar 27, 2013 at 10:59 AM, Kent, Jonathan D <[email protected]> wrote: > Hi, > > > > Seeing a problem across our rhel6.2 (kernel 2.6.32-220) servers with > regards to cpu utilisation reporting. > > > > I'm see 0% idle regularly from the output of collectl at present. > Test all versions from 3.4.0 to the latest version and they all show this > behaviour. > From looking at the Q&A package this is blamed on the kernel not > supplying correct information in /proc/stat, yet I cannot see this > issues. Equally when I run mpstat aside collectl, this returns the > correct idle %, whilst collectl does not. > > > > Anyone else seen this? > > > > Regards, > > Jon > > > > > > > > > > > > This email is confidential and subject to important disclaimers and > conditions including on offers for the purchase or sale of securities, > accuracy and completeness of information, viruses, confidentiality, > legal privilege, and legal entity disclaimers, available at > http://www.jpmorgan.com/pages/disclosures/email. > > > ---------------------------------------------------------------------- > -------- Own the Future-Intel® Level Up Game Demo Contest 2013 > Rise to greatness in Intel's independent game demo contest. > Compete for recognition, cash, and the chance to get your game on > Steam. $5K grand prize plus 10 genre and skill prizes. > Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d > _______________________________________________ > Collectl-interest mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/collectl-interest > ------------------------------------------------------------------------------ Own the Future-Intel® Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://p.sf.net/sfu/intel_levelupd2d _______________________________________________ Collectl-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/collectl-interest
