From: Dave Taht <dave.taht@gmail.com>
To: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] tiny monsters: multicast packets
Date: Sun, 29 May 2011 10:07:07 -0600 [thread overview]
Message-ID: <BANLkTim=xpuFEUPORqEZMdO_nhd_3_0c7w@mail.gmail.com> (raw)
In-Reply-To: <7i62otpks1.fsf@lanthane.pps.jussieu.fr>
[-- Attachment #1: Type: text/plain, Size: 1351 bytes --]
On Sun, May 29, 2011 at 9:51 AM, Juliusz Chroboczek <jch@pps.jussieu.fr>wrote:
> >> Are you seeing high CPU load in interrupt context? (Run top.)
>
> > Yes. 99% sirq.
>
> Could be due to a simplistic Ethernet driver. If you have the time and
> energy, you may want to ask on dev.openwrt.org.
>
> I will have some energy and time, shortly.
That said, several great openwrt people are on this list, and may be able to
weigh in.
I'm glad that the limit of about 130Mbit on the ethernet side for gigE could
be mitigated with a better driver. (and that said, 130Mbit is "good enough"
for most of the world)
On the other hand, making the switch that lays underneath this driver, work
well, looks hard.
Does anybody here speak enough Taiwanese to get enough detail on the
rtl8366s to see what it would take to enable fair queueing and port
mirroring?
or have a relationship with realtek they could use to get this info?
The datasheet has insufficient detail, and yet the switch seems enormously
capable, at least in theory. The kind of numbers under load I've seen thus
far (ranging from .9ms to 170ms) suggest port starvation.
http://realtek.info/pdf/rtl8366s_8366sr_datasheet_vpre-1.4_20071022.pdf
> -- Juliusz
>
--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
[-- Attachment #2: Type: text/html, Size: 2171 bytes --]
next prev parent reply other threads:[~2011-05-29 15:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-29 13:23 Dave Taht
2011-05-29 14:10 ` Jonathan Morton
2011-05-29 15:10 ` Dave Taht
2011-05-29 15:33 ` Juliusz Chroboczek
2011-05-29 15:44 ` Dave Taht
2011-05-29 15:51 ` Juliusz Chroboczek
2011-05-29 16:07 ` Dave Taht [this message]
2011-05-29 16:07 ` Dave Taht
2011-05-29 16:53 ` Dave Taht
2011-05-29 16:33 ` Eric Dumazet
2011-05-29 17:02 ` Dave Taht
2011-05-29 17:17 ` Eric Dumazet
2011-05-29 17:40 ` Dave Taht
2011-05-29 17:47 ` Jonathan Morton
2011-05-29 19:14 ` Eric Dumazet
2011-05-29 15:21 ` Juliusz Chroboczek
2011-05-29 15:57 ` Dave Taht
2011-05-31 14:58 ` Jim Gettys
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
List information: https://lists.bufferbloat.net/postorius/lists/bloat.lists.bufferbloat.net/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='BANLkTim=xpuFEUPORqEZMdO_nhd_3_0c7w@mail.gmail.com' \
--to=dave.taht@gmail.com \
--cc=bloat@lists.bufferbloat.net \
/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