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From: Daniel Phillips <phillips@bonn-fries.net>
To: William Lee Irwin III <wli@holomorphy.com>
Subject: Re: 2.4.19pre2aa1
Date: Thu, 7 Mar 2002 12:46:39 +0100
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Cc: Andrea Arcangeli <andrea@suse.de>, linux-kernel@vger.kernel.org,
        riel@surriel.com, hch@infradead.org
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On March 7, 2002 12:47 pm, William Lee Irwin III wrote:
> On March 7, 2002 11:49 am, William Lee Irwin III wrote:
> >> 4096 threads blocked on I/O is already approaching or exceeding the
> >> scalability limits of other core kernel subsystems.
> 
> On Thu, Mar 07, 2002 at 12:27:41PM +0100, Daniel Phillips wrote:
> > I think he meant that with larger ram it's easy to justify making the wait
> > table a little looser, to gain a tiny little bit of extra performance.
> > That seems perfectly reasonable to me.  Oh, and there's also the observation
> > that machines with larger ram tend to be more heavily loaded with processes,
> > just because one can.
> 
> And these processes will not be waiting on pages as often, either, as
> pages will be more plentiful.
> 
> From the reports I've seen, typical numbers of waiters on pages, even
> on large systems, are as much as an order of magnitude fewer in number
> than 4096. It would seem applications need to wait on pages less with
> the increased memory size.

Uh Yup.

-- 
Daniel
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