Messages in this thread | | | From | Rusty Russell <> | Subject | Re: [CFT][RFC] HT scheduler | Date | Fri, 12 Dec 2003 11:58:59 +1100 |
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In message <3FD8317B.4060207@cyberone.com.au> you write: > > > Nick Piggin wrote: > > > > > Don't ask me why it runs out of steam at 150 rooms. hackbench does > > something similar. I think it might be due to some resource running > > short, or a scalability problem somewhere else. > > > OK, it is spinning on .text.lock.futex. The following results are > top 10 profiles from a 120 rooms run and a 150 rooms run. The 150 > room run managed only 24.8% the throughput of the 120 room run. > > Might this be a JVM problem?
Not if hackbench is showing it.
> I'm using Sun Java HotSpot(TM) Server VM (build 1.4.2_01-b06, mixed mode) > > ROOMS 120 150 > PROFILES > total 100.0% 100.0% > default_idle 81.0% 66.8% > .text.lock.rwsem 4.6% 1.3% > schedule 1.9% 1.4% > .text.lock.futex 1.5% 19.1%
Increase FUTEX_HASHBITS?
Rusty. -- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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