From: Bjorn Helgaas <bjorn.helgaas@hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] improve scalability of 2.4.21 fpassist
Date: Tue, 29 Jul 2003 23:06:36 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105952002320917@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105726499515305@msgid-missing>
On Thursday 03 July 2003 2:36 pm, John Hawkes wrote:
> This change has already made its way into linux-2.5.72-ia64-031619.diff.
> Here is the diff relative to 2.4.21 + linux-2.4.21-ia64-030702.diff.
>
> This patch *significantly* improves the scalability of handle_fpu_swa()
> when multiple CPUs are generating concurrent fp-assist traps.
> The original algorithm produces cacheline ping-ponging for the cacheline
> that contains fpu_swa_count. This new algorithm only dirties
> fpu_sw_count when the printk() is about to occur, rather than on every
> fpassist trap, which throttles the ping-ponging to no more than five per
> second.
I applied this for 2.4. Thanks!
Bjorn
prev parent reply other threads:[~2003-07-29 23:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-03 20:36 [PATCH] improve scalability of 2.4.21 fpassist John Hawkes
2003-07-29 23:06 ` Bjorn Helgaas [this message]
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=marc-linux-ia64-105952002320917@msgid-missing \
--to=bjorn.helgaas@hp.com \
--cc=linux-ia64@vger.kernel.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.