From: "David S. Miller" <davem@davemloft.net>
To: akepner@sgi.com
Cc: mchan@broadcom.com, netdev@oss.sgi.com
Subject: Re: Perf data with recent tg3 patches
Date: Fri, 20 May 2005 15:33:26 -0700 (PDT) [thread overview]
Message-ID: <20050520.153326.08322399.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.61.0505201442380.11419@linux.site>
From: Arthur Kepner <akepner@sgi.com>
Date: Fri, 20 May 2005 14:52:35 -0700 (PDT)
> When the default coalescence parameters are used (rx-frames,
> rx-frames-irq both set to 5) the maximum number of received
> packets per interrupt is ~4.2. Setting rx-frames and
> rx-frames-irq to 20 caused the maximum number of received
> packets per interrupt to rise to ~19.6. Maximum CPU
> utilization went down from ~52% to ~35%. Very nice.
Yes, but using such a high value makes latency go into the
toilet. :-)
I'd much rather see dynamic settings based upon packet rate.
It's easy to resurrect the ancient code from the early
tg3 days which does this.
Thanks for all your testing, it is very informative and
useful.
next prev parent reply other threads:[~2005-05-20 22:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-13 2:49 Perf data with recent tg3 patches Arthur Kepner
[not found] ` <20050512.211935.67881321.davem@davemloft.net>
2005-05-13 23:57 ` Arthur Kepner
2005-05-14 0:50 ` David S. Miller
2005-05-14 0:39 ` Michael Chan
2005-05-14 5:20 ` David S. Miller
2005-05-20 21:52 ` Arthur Kepner
2005-05-20 22:33 ` David S. Miller [this message]
2005-05-20 22:52 ` Rick Jones
2005-05-20 22:54 ` Arthur Kepner
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=20050520.153326.08322399.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=akepner@sgi.com \
--cc=mchan@broadcom.com \
--cc=netdev@oss.sgi.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;
as well as URLs for NNTP newsgroup(s).