Messages in this thread |  | | | Date | Mon, 25 Oct 2004 14:58:07 +0200 | | From | Ingo Molnar <> | | Subject | Re: Linux 2.6.9 latencies: scheduler bug? |
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* Sami Farin <7atbggg02@sneakemail.com> wrote:
> forget this stupid ip_tables.c patch, latencies have nothing to do with > netfilter code, but bad interaction between xmms, rtc_latencytest > and iptables. I now get at max 3.1s (yup, 3100000us) latencies. > http://safari.iki.fi/2.6.9-xmms-fun-1.png > if you want to reproduce this: > 1) run "rtc_latencytest 1024" (can't reproduce with "rtc_latencytest 512") > 2) press play in xmms > 3) start iptables-script
to further debug any latencies please apply the -RT patchset and enable PREEMPT_TIMING (and LATENCY_TRACING), that enables us to tell us more about the latencies. You dont have to enable PREEMPT_REALTIME (the most experimental feature of the patchset) to measure latencies.
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