From: Eric Dumazet <eric.dumazet@gmail.com>
To: "John A. Sullivan III" <jsullivan@opensourcedevel.com>
Cc: netdev@vger.kernel.org
Subject: Re: Latency difference between fifo and pfifo_fast
Date: Tue, 06 Dec 2011 07:02:57 +0100 [thread overview]
Message-ID: <1323151377.2467.13.camel@edumazet-laptop> (raw)
In-Reply-To: <30c2e9e0-4208-4c19-9e43-31f95e13575d@jasiiieee>
Le lundi 05 décembre 2011 à 23:10 -0500, John A. Sullivan III a écrit :
> Hello, all. We are trying to minimize latency on our iSCSI SAN. The
> network is entirely dedicated to the iSCSI traffic. Since all the
> traffic is the same, would it make sense to change the qdisc for that
> interface to fifo from the default pfifo_fast or is the latency
> difference between the two completely negligible? Thanks - John
A very small difference indeed. How many packets per second are
expected ? What kind of NIC are you using ?
next prev parent reply other threads:[~2011-12-06 6:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8f05fdb0-6e4c-4adf-b8d1-bd67a0dc114f@jasiiieee>
2011-12-06 4:10 ` Latency difference between fifo and pfifo_fast John A. Sullivan III
2011-12-06 6:02 ` Eric Dumazet [this message]
2011-12-06 6:29 ` Eric Dumazet
2011-12-06 8:39 ` John A. Sullivan III
2011-12-06 8:51 ` Eric Dumazet
2011-12-06 18:20 ` Rick Jones
2011-12-06 18:39 ` Dave Taht
2011-12-06 19:44 ` John A. Sullivan III
2011-12-07 13:04 ` Eric Dumazet
2011-12-07 13:27 ` Dave Taht
2011-12-07 14:08 ` David Laight
2011-12-08 0:05 ` John A. Sullivan III
2011-12-07 23:27 ` Stephen Hemminger
2011-12-08 0:34 ` John A. Sullivan III
2011-12-07 23:49 ` Stephen Hemminger
2011-12-08 3:20 ` John A. Sullivan III
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=1323151377.2467.13.camel@edumazet-laptop \
--to=eric.dumazet@gmail.com \
--cc=jsullivan@opensourcedevel.com \
--cc=netdev@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).