Messages in this thread | | | Date | Thu, 28 Oct 2004 15:16:22 +0200 | From | Ingo Molnar <> | Subject | Re: [RFC][PATCH] Restricted hard realtime |
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* Karim Yaghmour <karim@opersys.com> wrote:
> >with -RT-V0.3 i get lower than 20 usec _maximum_ latencies during > >'./hackbench 20'. (the average latency is 1 usec) So while i'm not yet > >in the sub-femtosecond category, things are looking pretty good in > >PREEMPT_REALTIME land :) > > Just curious: what's the setup here? (CPU speed, peripherals, distro, > applications being run to load the system, etc.) [...]
2 GHz Athlon running stock Fedora Core. './hackbench 20' was the workload.
> I'm assuming that the timings are measured using the tracing > functionality currently in the patches.
no, i used a user-space timing app called 'realfeel', but the numbers were corroborated by the in-kernel tracer too.
but ... the best test would be if you tried the patch, it's not hard ;) There are newer versions since i did the above measurement and testing feedback is always welcome.
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