On Fri, Sep 28, 2007 at 09:30:27AM -0400, chloe K wrote:
> Hi all
>
> How can I find out the /proc/net info
>
> eg: softnet_stat is for what purpose
Much of this is only well-documented in the code. Here's an attempt
at interpreting softnet_stat [no guarantee that it is correct; read the code!]:
% softnet_stat.sh
cpu total dropped squeezed collision
0 1794619684 0 346 0
1 36399632 0 74 2
% softnet_stat.sh -h
usage: softnet_stat.sh [ -h ]
Output column definitions:
cpu # of the cpu
total # of packets (not including netpoll) received by the interrupt handler
There might be some double counting going on:
net/core/dev.c:1643: __get_cpu_var(netdev_rx_stat).total++;
net/core/dev.c:1836: __get_cpu_var(netdev_rx_stat).total++;
I think the intention was that these were originally on separate
receive paths ...
dropped # of packets that were dropped because netdev_max_backlog was exceeded
squeezed # of times ksoftirq ran out of netdev_budget or time slice with work
remaining
collision # of times that two cpus collided trying to get the device queue lock.
The script is attached.
Regards,
Bill Rugolsky
Attachment:
softnet_stat.sh
Description: Bourne shell script
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