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Message-Id: <200909081745.21091.mb@bu3sch.de> Date: Tue, 8 Sep 2009 17:45:18 +0200 From: Michael Buesch <mb@...sch.de> To: Ingo Molnar <mingo@...e.hu> Cc: Con Kolivas <kernel@...ivas.org>, linux-kernel@...r.kernel.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Mike Galbraith <efault@....de>, Felix Fietkau <nbd@...nwrt.org> Subject: Re: BFS vs. mainline scheduler benchmarks and measurements On Monday 07 September 2009 22:57:01 Ingo Molnar wrote: > > * Michael Buesch <mb@...sch.de> wrote: > > > On Monday 07 September 2009 20:26:29 Ingo Molnar wrote: > > > Could you profile it please? Also, what's the context-switch rate? > > > > As far as I can tell, the broadcom mips architecture does not have > > profiling support. It does only have some proprietary profiling > > registers that nobody wrote kernel support for, yet. > > Well, what does 'vmstat 1' show - how many context switches are > there per second on the iperf server? In theory if it's a truly > saturated box, there shouldnt be many - just a single iperf task > running at 100% CPU utilization or so. > > (Also, if there's hrtimer support for that board then perfcounters > could be used to profile it.) CFS: procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 0 0 15892 1684 5868 0 0 0 0 268 6 31 69 0 0 1 0 0 15892 1684 5868 0 0 0 0 266 2 34 66 0 0 1 0 0 15892 1684 5868 0 0 0 0 266 6 33 67 0 0 1 0 0 15892 1684 5868 0 0 0 0 267 4 37 63 0 0 1 0 0 15892 1684 5868 0 0 0 0 267 6 34 66 0 0 [ 4] local 192.168.1.1 port 5001 connected with 192.168.1.99 port 47278 2 0 0 15756 1684 5868 0 0 0 0 1655 68 26 74 0 0 2 0 0 15756 1684 5868 0 0 0 0 1945 88 20 80 0 0 2 0 0 15756 1684 5868 0 0 0 0 1882 85 20 80 0 0 2 0 0 15756 1684 5868 0 0 0 0 1923 86 18 82 0 0 2 0 0 15756 1684 5868 0 0 0 0 1986 87 23 77 0 0 2 0 0 15756 1684 5868 0 0 0 0 1923 87 17 83 0 0 2 0 0 15756 1684 5868 0 0 0 0 1951 84 19 81 0 0 2 0 0 15756 1684 5868 0 0 0 0 1970 87 18 82 0 0 2 0 0 15756 1684 5868 0 0 0 0 1972 85 23 77 0 0 2 0 0 15756 1684 5868 0 0 0 0 1961 87 18 82 0 0 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 28.6 MBytes 23.9 Mbits/sec 1 0 0 15752 1684 5868 0 0 0 0 599 22 22 78 0 0 1 0 0 15752 1684 5868 0 0 0 0 269 4 32 68 0 0 1 0 0 15752 1684 5868 0 0 0 0 266 4 29 71 0 0 1 0 0 15764 1684 5868 0 0 0 0 267 6 37 63 0 0 1 0 0 15764 1684 5868 0 0 0 0 267 4 31 69 0 0 1 0 0 15768 1684 5868 0 0 0 0 266 4 51 49 0 0 I'm currently unable to test BFS, because the device throws strange flash errors. Maybe the flash is broken :( -- Greetings, Michael. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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