From: "Roman V. Shaposhnik" <rvs@sun.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] 8 cores
Date: Thu, 17 Jul 2008 03:14:57 -0700 [thread overview]
Message-ID: <1216289697.4327.55.camel@goose.sun.com> (raw)
In-Reply-To: <2125ed224c77c85fc13d81eb95377a2a@terzarima.net>
On Thu, 2008-07-17 at 10:07 +0100, Charles Forsyth wrote:
> > I could imagine that databases use mmap() havily
>
> it's a little mystery for me why they would do that since it's slower (or ought to be),
slower compared to what? I'd expect the biggest slowdown for
read()/write() be not the price of a syscall, but what you
pay for copying data in/out of the kernel. With mmap() there's
no copying.
Thanks,
Roman.
next prev parent reply other threads:[~2008-07-17 10:14 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 22:28 erik quanstrom
2008-07-15 22:27 ` Benjamin Huntsman
2008-07-15 22:35 ` Williams, Mitch
2008-07-16 1:39 ` erik quanstrom
2008-07-16 5:12 ` Benjamin Huntsman
2008-07-16 7:00 ` sqweek
2008-07-16 12:54 ` Russ Cox
2008-07-16 11:37 ` C H Forsyth
2008-07-16 12:13 ` John Waters
2008-07-16 13:03 ` a
2008-07-16 13:44 ` Uriel
2008-07-16 13:55 ` John Waters
2008-07-16 14:16 ` Robert William Fuller
2008-07-16 13:07 ` erik quanstrom
2008-07-16 13:42 ` Uriel
2008-07-16 15:02 ` Benjamin Huntsman
2008-07-16 18:56 ` Uriel
2008-07-17 7:59 ` Kernel Panic
2008-07-17 9:07 ` Charles Forsyth
2008-07-17 10:04 ` Kernel Panic
2008-07-17 10:14 ` Roman V. Shaposhnik [this message]
2008-07-17 12:55 ` ron minnich
2008-07-17 12:58 ` William Josephson
2008-07-17 13:45 ` erik quanstrom
2008-07-17 14:11 ` ron minnich
2008-07-17 14:32 ` Roman V. Shaposhnik
2008-07-17 13:32 ` Paweł Lasek
2008-07-17 14:07 ` Kernel Panic
2008-07-16 22:44 ` Iruata Souza
2008-07-17 8:38 ` Kernel Panic
2008-07-17 18:14 ` Iruata Souza
2008-07-23 11:42 ` matt
2008-07-23 18:32 ` Iruata Souza
2008-07-16 1:41 ` andrey mirtchovski
2008-07-16 20:38 ` Roman V. Shaposhnik
2008-07-17 2:09 ` erik quanstrom
2008-07-17 10:18 ` Roman V. Shaposhnik
2008-07-17 12:41 erik quanstrom
2008-07-17 12:56 ` William Josephson
2008-07-17 12:58 ` ron minnich
2008-07-17 13:46 ` erik quanstrom
2008-07-17 14:06 ` ron minnich
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1216289697.4327.55.camel@goose.sun.com \
--to=rvs@sun.com \
--cc=9fans@9fans.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).