Messages in this thread | | | Subject | Re: 2.6.17-rc6-rt1 | From | Mike Galbraith <> | Date | Fri, 09 Jun 2006 20:41:06 +0200 |
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On Fri, 2006-06-09 at 08:55 -0700, Daniel Walker wrote: > 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. > > What priority ?
Bare minimum. None of the other tasks that were scheduled were rt in their own right though.
-Mike
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