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On Sat, 22 Oct 2005 19:41, Paolo Ciarrocchi wrote: > On 10/22/05, Con Kolivas <kernel@kolivas.org> wrote: > > On Sat, 22 Oct 2005 11:20, Con Kolivas wrote: > > > Testing has confirmed much larger prefetch values work well. > > > > Bah.. Sorry take this one instead. Just make sure that no matter how > > little ram we have prefetch is enabled. > > Con, > would you be so kind to post more information about the test you've done ? My concern was to not cause a detriment to performance in any noticeable way. The prefetch sizes were tested on a number of machines with different speed hard drive / ram size combinations to ensure none of the default values ever caused any significant I/O wait, or that heavy memory requiring compiles took any longer to complete as these constantly need new ram allocations and I wanted to ensure that prefetching into ram didn't slow down those allocations. Furthermore, the time taken to actually prefetch the application is now more than 5 times faster because of the larger default prefetch values. Cheers, Con - 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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