Messages in this thread | | | Subject | Re: 2.6.17-rc6-rt1 | From | Thomas Gleixner <> | Date | Fri, 09 Jun 2006 16:31:36 +0200 |
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On Fri, 2006-06-09 at 15:42 +0200, Mike Galbraith wrote: > On Fri, 2006-06-09 at 15:11 +0200, Thomas Gleixner wrote: > > On Fri, 2006-06-09 at 14:57 +0200, Sébastien Dugué wrote: > > > All the round trips under strace are in the 2ms range. > > > > > > How on earth can it be that stracing the ping gives better > > > performance??? > > > > Was busy fixing a scheduling while atomic bug. I just verified that I > > have the same weird behaviour. I'm looking into it. > > I downloaded and patched a ping.c to do a user triggered latency trace > around recvfrom() of a ping -c 1 127.0.0.1 running SCHED_RR. We > schedule away at 25us, do aaaall kinds of interesting stuff, and come > back at 42234us. If you want the trace, holler. It's 51k bzipped.
Yes, please send it offlist to me.
Thanks,
tglx
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