Messages in this thread | | | Date | Fri, 6 Jul 2007 00:54:13 -0700 (PDT) | From | Martin Knoblauch <> | Subject | Re: Understanding I/O behaviour |
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--- Jesper Juhl <jesper.juhl@gmail.com> wrote:
> On 06/07/07, Robert Hancock <hancockr@shaw.ca> wrote: > [snip] > > > > Try playing with reducing /proc/sys/vm/dirty_ratio and see how that > > helps. This workload will fill up memory with dirty data very > quickly, > > and it seems like system responsiveness often goes down the toilet > when > > this happens and the system is going crazy trying to write it all > out. > > > > Perhaps trying out a different elevator would also be worthwhile. >
AS seems to be the best one (NOOP and DeadLine seem to be equally OK). CFQ gives less (about 10-15%) throughput except for the kernel with the cfs cpu scheduler, where CFQ is on par with the other IO schedulers.
Thanks Martin
------------------------------------------------------ Martin Knoblauch email: k n o b i AT knobisoft DOT de www: http://www.knobisoft.de - 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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