Messages in this thread | | | Date | Mon, 01 Sep 2008 12:16:47 +0300 | From | Avi Kivity <> | Subject | Re: [REGRESSION] High, likely incorrect process cpu usage counters with kvm and 2.6.2[67] |
| |
Parag Warudkar wrote: > On Sun, Aug 31, 2008 at 11:43 AM, Avi Kivity <avi@qumranet.com> wrote: > >> Running an idle Windows VM on Linux 2.6.26+ with kvm, one sees high values >> for the kvm process in top (30%-70% cpu), where one would normally expect >> 0%-1%. Surprisingly, the per-cpu system counters show almost 100% idle, >> leading me to believe this is an accounting error and that the process does >> not actually consume this much cpu. >> > > Busted process accounting - This looks the same as > http://bugzilla.kernel.org/show_bug.cgi?id=11209 . > Please verify. Peter's patch in latest git stops showing "incorrect > looking" CPU usage but at least the process times are still wrong, > horribly. > In fact the CPU usage thing in -rc5 is likely also incorrect but I > need to analyze that bit a little more. > > From Today's Git - > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 12961 parag 20 0 83000 8908 6628 R 0 0.1 5124415h npviewer.bin > >
Yes, it looks very similar. In my tests, %CPU is consistent with TIME; it's just not consistent with what's actually happening and with the global statistics.
-- error compiling committee.c: too many arguments to function
| |