Messages in this thread |  | | Subject | Re: [PATCH] Preemption Latency Measurement Tool | From | Robert Love <> | Date | 22 Sep 2001 22:44:57 -0400 |
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On Sat, 2001-09-22 at 17:09, Dieter Nützel wrote: > Yes, I do like I've posted in all the related threads. > > Here is some more input for you. I hope it could help nail it down. > > Regards, > Dieter > > BTW I'll now switching to 2.4.10-pre14 > > SunWave1#time tar xIf /Pakete/Linux/linux-2.4.9.tar.bz2 > 34.570u 5.350s 0:47.84 83.4% 0+0k 0+0io 295pf+0w > > I "hear" some have disk activities (disk trashing). > > SunWave1#sync > > Runs for ages!!!
It has to flush that whole tar job you just did, which it did in memory :)
> User CPU 0% > System CPU 0% > Idle CPU 99% > > So where did it wait??? > > Here comes what latencytimes show: > > Worst 20 latency times of 5061 measured in this period. > usec cause mask start line/file address end line/file > 322263 reacqBKL 1 1375/sched.c c01138b4 697/sched.c > 216174 BKL 1 30/inode.c c016b971 52/inode.c > 158328 BKL 9 742/block_dev.c c0144d51 697/sched.c
OK, these three are not acceptable...adding them to the "list".
-- Robert M. Love rml at ufl.edu rml at tech9.net
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