From: Mike Fedyk <mfedyk@matchmail.com>
To: Con Kolivas <kernel@kolivas.org>
Cc: linux kernel mailing list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH]O20int
Date: Wed, 3 Sep 2003 12:19:46 -0700 [thread overview]
Message-ID: <20030903191946.GB16361@matchmail.com> (raw)
In-Reply-To: <200309040053.22155.kernel@kolivas.org>
On Thu, Sep 04, 2003 at 12:53:10AM +1000, Con Kolivas wrote:
> Smaller timeslice granularity for most interactive tasks and larger for less
> interactive. Smaller for each extra cpu.
> +#ifdef CONFIG_SMP
> +#define TIMESLICE_GRANULARITY(p) \
> + (MIN_TIMESLICE * (1 << (MAX_BONUS - CURRENT_BONUS(p))) * \
> + num_online_cpus())
> +#else
> +#define TIMESLICE_GRANULARITY(p) \
> + (MIN_TIMESLICE * (1 << (MAX_BONUS - CURRENT_BONUS(p))))
> +#endif
> +
Don't you want to put a max(10,TIMESLICE_GRANULARITY) in there so that the
time slice won't go below 1ms for large proc servers? I'm not sure if it
was you, or someone else but they did some testing to see how the
timeslice length affected the cache warmth, and the major improvements
stopped after 7ms, so 10 might be a good default mimimum.
Mike
next prev parent reply other threads:[~2003-09-03 19:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-03 14:53 [PATCH]O20int Con Kolivas
2003-09-03 19:19 ` Mike Fedyk [this message]
2003-09-03 22:55 ` [PATCH]O20int Con Kolivas
2003-09-04 0:12 ` [PATCH]O20int Mike Fedyk
2003-09-04 0:27 ` [PATCH]O20int Con Kolivas
2003-09-04 1:52 ` [PATCH]O20int Mike Fedyk
2003-09-07 5:41 ` [PATCH]O20int Matt Heler
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=20030903191946.GB16361@matchmail.com \
--to=mfedyk@matchmail.com \
--cc=akpm@osdl.org \
--cc=kernel@kolivas.org \
--cc=linux-kernel@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 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).