Messages in this thread | | | Date | Fri, 5 Mar 2004 22:07:55 +0100 | From | Andrea Arcangeli <> | Subject | Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end) |
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On Fri, Mar 05, 2004 at 12:41:19PM -0800, Andrew Morton wrote: > Andrea Arcangeli <andrea@suse.de> wrote: > > > > > > The main thing you didn't mention is the overhead in the per-cpu data > > > > structures, that alone generates an overhead of several dozen mbytes > > > > only in the page allocator, without accounting the slab caches, > > > > pagetable caches etc.. putting an high limit to the per-cpu caches > > > > should make a 32-way 32G work fine with 3:1 too though. 8-way is > > > > fine with 32G currently. > > > > > > Humpf. Do you have a hard figure on how much it actually is per cpu? > > > > not a definitive one, but it's sure more than 2m per cpu, could be 3m > > per cpu. > > It'll average out to 68 pages per cpu. (4 in ZONE_DMA, 64 in ZONE_NORMAL).
3m per cpu with all 3m in zone normal. - 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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