From: Rick Jones <rick.jones2@hp.com>
To: Hosam Hittini <h.hittini@gmail.com>, netdev@vger.kernel.org
Subject: Re: Ring parameter information
Date: Mon, 15 Sep 2014 08:19:15 -0700 [thread overview]
Message-ID: <54170373.5070303@hp.com> (raw)
In-Reply-To: <F225A4E9-1298-4262-8F24-9BF368100C78@gmail.com>
On 09/14/2014 11:14 PM, Hosam Hittini wrote:
> Hi,
>
> I have two network interfaces and I used "ethtool -g" to get their ring parameters, but I don’t quite understand the output
> For the ethernet interface the output says the operation is not supported
> For the wireless interface the output says the sending and receiving buffer sizes are equal to zero
> I wonder if anyone can help me with that
>
> hosam@Robin-01:~$ sudo ethtool -g eth0
> Ring parameters for eth0:
> Cannot get device ring settings: Operation not supported
That means what it says - the driver/device for eth0 does not support
reporting ring settings.
> hosam@Robin-01:~$ sudo ethtool -g wlan1
> Ring parameters for wlan1:
> Pre-set maximums:
> RX: 0
> RX Mini: 0
> RX Jumbo: 0
> TX: 0
> Current hardware settings:
> RX: 0
> RX Mini: 0
> RX Jumbo: 0
> TX: 0
I am just guessing, but I would guess one of two things - either that
driver doesn't "really" support retrieving ring settings, or there is a
bug or no way for it to report them in a meaningful way. You should
look-up the driver name (ethtool -i) and then go to a kernel source tree
and find that driver under drivers/net/ and see what its ethtool support
code looks like.
rick jones
prev parent reply other threads:[~2014-09-15 15:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <06FE00B9-3F10-48CD-ABC7-7817006FDBDD@gmail.com>
2014-09-15 6:14 ` Ring parameter information Hosam Hittini
2014-09-15 15:19 ` Rick Jones [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=54170373.5070303@hp.com \
--to=rick.jones2@hp.com \
--cc=h.hittini@gmail.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 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.