From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Hall Subject: per-PID network stats files in /proc Date: Tue, 24 Sep 2013 13:15:37 -0700 Message-ID: <20130924201536.GA3555@mhcomputing.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: netdev@vger.kernel.org Return-path: Received: from master.mhcomputing.net ([74.208.46.186]:49399 "EHLO mail.mhcomputing.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754205Ab3IXUXM (ORCPT ); Tue, 24 Sep 2013 16:23:12 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: Hello, I have an application that I'd like to make self-tuning, based upon the values of some of the network stats counters. Thus I went reading through a copy of linux-3.11.1 to look for some more information, and began exploring procfs as well. I discovered some system-wide counters in /proc/net/snmp which are pretty interesting so I was trying to use the per-PID counters in /proc/net/PID/net/snmp as well. Unfortunately I found that all of these files seem to be identical on my own system running Linux 3.2.0: $ md5sum /proc/net/snmp /proc/1/net/snmp /proc/2/net/snmp 8b92b426f860d0667a780cd8baabb7bf /proc/net/snmp 8b92b426f860d0667a780cd8baabb7bf /proc/1/net/snmp 8b92b426f860d0667a780cd8baabb7bf /proc/2/net/snmp I found the snmp_seq_show function in net/ipv4/proc.c which prints these statistics to see how it really worked, but then I was having a hard time finding out what's really calling this code since it hooks up to the /proc framework. Is there some option one can change which enables gathering the network statistics per-PID, or per-socket? This would be a tremendous help for my application. Thanks, Matthew.