Re: Getting NIC statistics using Ethtool.

["Pranav Sawargaonkar" <pranav.sawargaonkar@xxxxxxxxx>]

On Tue, Nov 25, 2008 at 2:17 PM, Paraneetharan Chandrasekaran <paraneetharanc@xxxxxxxxx> wrote:

Hi,

           Thank you. But my intention is getting statistics in user space through ethtool. The ethtool_interfaces like get_ethtool_stats, get_drvinfo etc are in kernel space. If call the Ioctl with ETHTOOL_GSTATS, I dont know how to parse the returned data. What is the format of the returned statistics?  is there any format which all the drivers support?

 

 Return foramat is of a type struct  ethtool_stats (defined inside kernel header  file include/linux/ethtool.h).
Unfortunately in user space you do not have such a header file available, hence you should redifine those structure inside your code.

Just go through ethtool source code , it will really help you.

"http://www.sfr-fresh.com/linux/misc/ethtool-6.tar.gz/"
(Ethtool defines all the necessary structures like ethtool_stats inside ethtool-copy.h file.)

Thanks,
Pranav

Thanks,
Pranav

Thank you

Paraneetharan C

2008/11/25 Pranav Sawargaonkar <pranav.sawargaonkar@xxxxxxxxx>

On Tue, Nov 18, 2008 at 7:30 PM, Paraneetharan Chandrasekaran <paraneetharanc@xxxxxxxxx> wrote:

Hi All,
I am writing an user space application which gets the statistics from
the NIC drivers. To do this, I am using Ethtool ioctl with Ioctl
command SIOCETHTOOL and with ethtool command ETHTOOL_GSTATS along with
the address of struct ethtool_stats variable. My question is:

What would be the format of the statistics copied from the kernel
space (to the address pointed by the data field of struct
ethtool_stats) ?

Do all the drivers implement the same data format when they copy the
statistics to user space in response to this Ethtool ioctl?

If not, how can I know what format used by the driver I am working on
( I am working on  Atheros driver)?

You can get driver info from ethtool's get_drvinfo option.
Hence you can put a check in your application for a particular(like Intel and Broadcom ) driver.

Thanks,
Pranav

Thanks in advance,
Paraneetharan C

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