From: "Ihar 'Philips' Filipau" <filia@softhome.net>
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: cache limit
Date: Tue, 26 Aug 2003 21:08:51 +0200 [thread overview]
Message-ID: <3F4BB043.6010805@softhome.net> (raw)
In-Reply-To: <oQh2.4bQ.13@gated-at.bofh.it>
Mike Fedyk wrote:
> On Tue, Aug 26, 2003 at 12:15:46PM +0200, Ihar 'Philips' Filipau wrote:
>> If I have 1GB of memory and my applications for use only 16MB - it
>>doesn't mean I want to fill 1GB-16MB with garbage like file my momy had
>>viewed two weeks ago.
>>
>> That's it: OS should scale for *application* *needs*.
>>
>> Can you compare in your mind overhead of managing 1GB of cache with
>>managing e.g. 16MB of cache?
>>
>
> Ok, let's benchmark it.
>
> Yes, I can see the logic in your argument, but at this point, numbers are
> needed to see if or how much of a win this might be.
[ I beleive you can see those thread about O_STREAMING patch.
Not-caching was giving 10%-15% peformance boost for gcc on kernel
compiles. Isn't that overhead? ]
I will try to produce some benchmarktings tomorrow with different
'mem=%dMB'. I'm afraid to confirm that it will make difference.
But in advance: mantainance of page tables for 1GB and for 128MB of
RAM are going to make a difference.
next parent reply other threads:[~2003-08-26 19:07 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <oJ5P.699.21@gated-at.bofh.it>
[not found] ` <oJ5P.699.23@gated-at.bofh.it>
[not found] ` <oJ5P.699.25@gated-at.bofh.it>
[not found] ` <oJ5P.699.27@gated-at.bofh.it>
[not found] ` <oJ5P.699.19@gated-at.bofh.it>
[not found] ` <oQh2.4bQ.13@gated-at.bofh.it>
2003-08-26 19:08 ` Ihar 'Philips' Filipau [this message]
2003-08-26 19:23 ` cache limit Mike Fedyk
2003-08-27 10:21 ` Ihar 'Philips' Filipau
2003-08-27 11:07 ` Nick Piggin
2003-08-27 16:03 Joseph Malicki
[not found] <000801c36cb1$454d4950$1001a8c0@etofmv650>
2003-08-27 16:02 ` YoshiyaETO
[not found] <n7lV.2HA.19@gated-at.bofh.it>
[not found] ` <ofAJ.4dx.9@gated-at.bofh.it>
[not found] ` <ogZM.5KJ.1@gated-at.bofh.it>
[not found] ` <oyDw.5FP.33@gated-at.bofh.it>
2003-08-26 10:15 ` Ihar 'Philips' Filipau
2003-08-26 17:46 ` Mike Fedyk
[not found] <m6Bv.3ys.1@gated-at.bofh.it>
[not found] ` <mLY8.dO.5@gated-at.bofh.it>
2003-08-21 9:52 ` Ihar 'Philips' Filipau
2003-08-25 7:17 ` Takao Indoh
-- strict thread matches above, loose matches on Subject: below --
2003-08-19 4:39 Anthony R.
2003-08-19 4:57 ` Nuno Silva
2003-08-19 5:33 ` Denis Vlasenko
2003-08-19 6:20 ` Andrew Morton
2003-08-19 9:05 ` J.A. Magallon
2003-08-19 9:16 ` Andrew Morton
2003-08-19 9:28 ` J.A. Magallon
2003-08-19 9:43 ` Andrew Morton
2003-08-19 13:32 ` Erik Andersen
2003-08-19 20:56 ` Andrew Morton
2003-08-19 14:28 ` Anthony R.
2003-08-19 18:26 ` Mike Fedyk
2003-08-19 5:42 ` Nick Piggin
2003-08-21 0:49 ` Takao Indoh
2003-08-21 23:47 ` Mike Fedyk
2003-08-25 2:45 ` Takao Indoh
2003-08-25 4:11 ` William Lee Irwin III
2003-08-25 22:58 ` Mike Fedyk
2003-08-26 9:46 ` William Lee Irwin III
2003-08-27 9:36 ` Takao Indoh
2003-08-27 9:45 ` William Lee Irwin III
2003-08-27 11:14 ` Takao Indoh
2003-08-27 11:36 ` William Lee Irwin III
2003-09-02 10:52 ` Takao Indoh
2003-09-02 11:30 ` William Lee Irwin III
2003-09-02 17:21 ` Mike Fedyk
2003-08-27 16:01 ` Joseph Malicki
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