Nagios Support Forum

Christophe Yayon wrote:
> Hi all,
>
> i am upgrading our nagios 1.2 (on freebsd 5.3-release) to nagios 2.0
> (currently last cvs after 2.0b3) on Freebsd-5.4RC2 and i saw a very
> strange thing.
>
> After few hours, nagios main process (nagios -d ...) use lot of cpu time
> and when i do a truss on the pid (like a strace on linux), i have a
> 'kse_release' loop message.
>
>
>
> # top
> last pid: 75729; load averages: 1.81, 2.08, 2.03
> 63 processes: 2 running, 61 sleeping
> CPU states: 12.5% user, 0.0% nice, 16.0% system, 0.0% interrupt, 71.5% idle
> Mem: 36M Active, 1639M Inact, 219M Wired, 68M Cache, 112M Buf, 44M Free
> Swap: 5000M Total, 52K Used, 5000M Free
>
> PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
> 40435 nagios 112 0 4688K 3544K CPU0 0 569:46 93.99% 93.99% nagios
> [...]
>
>
> # truss -p 40435
> kse_release(0xbfbf9b70) ERR#22 'Invalid argument'
> kse_release(0xbfbf9b70) ERR#22 'Invalid argument'
> kse_release(0xbfbf9b70) ERR#22 'Invalid argument'
> [...]
>
> What does it means ? i know that there are some issue with pthreads on
> FreeBSD, but is it the same problem ?
>

Most likely. Without having a great deal of knowledge about BSD and
threads, I'd say kse_release attempts to release a mutex or a futex that
isn't locked. mutexes and futexes are spinlocked, so this sort of thing
is to be expected behaviour with buggy implementations of pthreads.

--
Andreas Ericsson [email protected]
OP5 AB www.op5.se
Lead Developer





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