Messages in this thread | | | Date | Mon, 21 May 2007 10:12:01 +0200 | From | Ingo Molnar <> | Subject | Re: bad networking related lag in v2.6.22-rc2 |
| |
* Ingo Molnar <mingo@elte.hu> wrote:
> > ouch! a nearly 1 second delay got observed by the scheduler - something > > is really killing your system! > > ah, you got the latency tracer from Thomas, as part of the -hrt patchset > - that makes it quite a bit easier to debug. [...]
and ... you already did a trace for Thomas, for the softirq problem:
http://cybertek.info/taitai/trace.txt.bz2
this trace shows really bad networking related kernel activities!
gkrellm-5977 does this at timestamp 0:
gkrellm-5977 0..s. 0us : cond_resched_softirq (established_get_next)
2 milliseconds later it's still in established_get_next() (!):
gkrellm-5977 0..s. 2001us : cond_resched_softirq (established_get_next)
and the whole thing takes ... 455 msecs:
gkrellm-5977 0..s. 455443us+: cond_resched_softirq (established_get_next)
i think this suggests that you have tons of open sockets. What does "netstat -ts" say on your box?
Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |