Re: [PATCH 00/07][RFC] i386: NUMA emulation

Martin J. Bligh
2005-10-03T15:08:59Z

--David Lang <david.lang@digitalinsight.com> wrote (on Monday, October 03, 2005 08:03:44 -0700):

> On Mon, 3 Oct 2005, Martin J. Bligh wrote:
>
>> But that's not the same at all! ;-) PAE memory is the same speed as
>> the other stuff. You just have a 3rd level of pagetables for everything.
>> One could (correctly) argue it made *all* memory slower, but it does so
>> in a uniform fashion.
>
> is it? I've seen during the memory self-test at boot that machines slow down noticably as they pass the 4G mark.

Not noticed that, and I can't see why it should be the case in general,
though I suppose some machines might be odd. Got any numbers?

M.