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Date: Sat, 7 Sep 2002 16:01:01 -0700
From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@digeo.com>
Cc: Paolo Ciarrocchi <ciarrocchi@linuxmail.org>, linux-kernel@vger.kernel.org
Subject: Re: LMbench2.0 results
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On Sat, Sep 07, 2002 at 09:20:56AM -0700, Andrew Morton wrote:
>>> The fork/exec/mmap slowdown is the rmap overhead.  I have some stuff
>>> which partialy improves it.

William Lee Irwin III wrote:
>> Hmm, Where does it enter the mmap() path? PTE instantiation is only done
>> for the VM_LOCKED case IIRC. Otherwise it should be invisible.

On Sat, Sep 07, 2002 at 04:12:49PM -0700, Andrew Morton wrote:
> Oh, is that just the mmap() call itself?

I'm not actually sure what lmbench is doing.


William Lee Irwin III wrote:
>> Perhaps testing with overcommit on would be useful.

On Sat, Sep 07, 2002 at 04:12:49PM -0700, Andrew Morton wrote:
> Well yes - the new overcommit code was a significant hit on the 16ways
> was it not?  You have some numbers on that?

I don't remember the before/after numbers, but I can collect some.


Cheers,
Bill
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