Re: [PATCH] x86: eliminate redundant/contradicting cache line sizeconfig options

From: Ingo Molnar
Date: Mon Nov 23 2009 - 03:35:30 EST



* Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

> On Thu, 19 Nov 2009 09:13:07 +0100
> Nick Piggin <npiggin@xxxxxxx> wrote:
> >
> > My other point was just this, but I don't care too much. But it is
> > worded pretty negatively. The key here is that increasing the value
> > too large tends to only cost a very small amount of size (and no
> > increase in cacheline foot print, only RAM).
>
> 128 has a pretty significant impact on TPC-C benchmarks.....
> it was the top issue until mainline fixed it to default to 64

Mind sending a patch that sets the default to 64 on NUMA too?

P4 based NUMA boxes are ... a bad memory to be forgotten.

Ingo
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