Messages in this thread | | | Date | Thu, 30 Jun 2005 18:55:57 +0200 | From | Ingo Molnar <> | Subject | Re: PREEMPT_RT and I-PIPE: the numbers, take 3 |
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* Kristian Benoit <kbenoit@opersys.com> wrote:
> "plain" run: > > Measurements | Vanilla | preemp_rt | > ---------------+-------------+----------------+ > fork | 93us | 157us (+69%) | > open/close | 2.3us | 3.7us (+43%) | > execve | 351us | 446us (+27%) | > select 500fd | 12.7us | 25.8us (+103%) | > mmap | 660us | 2867us (+334%) | > pipe | 7.1us | 11.6us (+63%) |
update: these tests should perform significantly better on the freshly released -50-37 (or later) PREEMPT_RT kernels. (fork, execve, mmap [*] was improved in -50-36, the others in -50-37)
Ingo
[*] the extent of the above fork/execve/mmap costs is still unexplained, unless the test was run with HIGHMEM64 and HIGHPTE enabled. - 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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