From: Bill Hartner <hartner@austin.ibm.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: Mala Anand <manand@us.ibm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
lse-tech@lists.sourceforge.net
Subject: Re: [Lse-tech] Re: efficient copy_to_user and copy_from_user routines in Linux Kernel
Date: Wed, 26 Jun 2002 09:50:38 -0500 [thread overview]
Message-ID: <3D19D4BE.45516C90@austin.ibm.com> (raw)
In-Reply-To: 3D18A26A.73E6DD07@zip.com.au
Andrew Morton wrote:
>
> Mala Anand wrote:
> >
> > Here is a 2.5.19 patch that improves the performance of IA32 copy_to_user
> > and copy_from_user routines used by :
...
>
> One question: have you tested on other CPU types? This problem is
> very specific to Intel hardware. On AMD, the eight-byte alignement
> artifact does not exist at all. It could be that your patch is not
> desirable on such CPUs?
>
In Mala's lab, there are a couple of 1.6 Ghz P4 systems that can be used to test on.
There is also a Netbench (P4 and PIII Xeon) and SPECweb99 (PIII Xeon) setup
that can be used for further testing.
There are some older P6 systems available too. Not sure about AMD yet.
Bill
next prev parent reply other threads:[~2002-06-26 14:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-24 19:34 efficient copy_to_user and copy_from_user routines in Linux Kernel Mala Anand
2002-06-24 19:33 ` David S. Miller
2002-06-24 20:24 ` [Lse-tech] " Niels Christiansen
2002-06-25 17:03 ` Andrew Morton
2002-06-25 17:43 ` kuznet
2002-06-25 19:47 ` Andrew Morton
2002-06-25 21:46 ` Chris Friesen
2002-06-26 13:54 ` Hirokazu Takahashi
2002-06-25 18:58 ` [Lse-tech] " Niels Christiansen
2002-06-25 19:11 ` Dave Jones
2002-06-26 12:58 ` Andi Kleen
2002-06-26 14:50 ` Bill Hartner [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-06-24 21:02 Mala Anand
2002-06-28 11:55 Mala Anand
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=3D19D4BE.45516C90@austin.ibm.com \
--to=hartner@austin.ibm.com \
--cc=akpm@zip.com.au \
--cc=linux-kernel@vger.kernel.org \
--cc=lse-tech@lists.sourceforge.net \
--cc=manand@us.ibm.com \
/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