Messages in this thread | | | Date | Wed, 22 Jun 2005 16:10:57 -0400 | From | Karim Yaghmour <> | Subject | Re: PREEMPT_RT vs I-PIPE: the numbers, part 2 |
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Bill Huey (hui) wrote: > FreeBSD went through some slow down when they moved to SMPng, but not > the kind of numbers you show for things surrounding the network stack. > Something clearly bad happened.
Note that the numbers are not freak accidents, they are consistent accross the various setups. So in total, that's 15 LMbench runs, all showing consistent _severe_ cost for preempt_rt. And this despite the fact that it comes down neck-to-neck with the ipipe on interrupt response time in those same tests. I would highly suggest setting up an automated benchmark for automatically running LMbench on every preempt_rt release and compare that to the vanilla kernel.
Karim -- Author, Speaker, Developer, Consultant Pushing Embedded and Real-Time Linux Systems Beyond the Limits http://www.opersys.com || karim@opersys.com || 1-866-677-4546 - 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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