From: Nix <nix@esperi.org.uk>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: How to use memory over 4GB
Date: Mon, 16 May 2005 22:34:00 +0100 [thread overview]
Message-ID: <87hdh2am9j.fsf@amaterasu.srvr.nix> (raw)
In-Reply-To: <6.2.1.2.2.20050516164236.05922a30@mail.tekno-soft.it> (Roberto Fichera's message of "16 May 2005 15:54:37 +0100")
On 16 May 2005, Roberto Fichera whispered secretively:
> At 16.17 16/05/2005, Eric Dumazet wrote:
>>If your process is cpu bounded (and not issuing too many system calls),
>> then 4GB/4GB split let it address more ram, reducing the need to shift windows in
>>mmaped files for example.
>
> ... any source code that explain better what you say ;-)!
<http://lkml.org/lkml/2003/7/8/246> perhaps?
(In a nutshell: it gives processes an extra 1Gb of virtual memory, at
the cost of making system calls --- and everything else that must
transition to kernel space --- *much* slower.)
next prev parent reply other threads:[~2005-05-16 21:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-16 12:42 How to use memory over 4GB Roberto Fichera
2005-05-16 12:56 ` Michael Tokarev
2005-05-16 13:16 ` Roberto Fichera
2005-05-16 15:10 ` William Lee Irwin III
2005-05-16 15:47 ` Roberto Fichera
2005-05-16 15:54 ` William Lee Irwin III
2005-05-16 16:37 ` Roberto Fichera
2005-05-16 19:14 ` Bill Davidsen
2005-05-16 12:57 ` Eric Dumazet
2005-05-16 13:18 ` Roberto Fichera
2005-05-16 14:17 ` Eric Dumazet
2005-05-16 14:50 ` Roberto Fichera
2005-05-16 21:34 ` Nix [this message]
2005-05-17 7:15 ` Roberto Fichera
2005-05-16 15:22 ` William Lee Irwin III
-- strict thread matches above, loose matches on Subject: below --
2005-05-16 12:55 li nux
2005-05-16 13:06 ` Roberto Fichera
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