From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.candelatech.com ([208.74.158.172]:59739 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751394Ab2CaD4c (ORCPT ); Fri, 30 Mar 2012 23:56:32 -0400 Received: from [50.47.233.138] (50-47-233-138.evrt.wa.frontiernet.net [50.47.233.138]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id q2V3uV68007537 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 30 Mar 2012 20:56:31 -0700 Message-ID: <4F76806E.2010101@candelatech.com> (sfid-20120331_055635_558966_95EF378B) Date: Fri, 30 Mar 2012 20:56:30 -0700 From: Ben Greear MIME-Version: 1.0 To: "linux-wireless@vger.kernel.org" Subject: Why is throughput so bad with lots of virtual stations? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: I notice that when I get, say, 200 virtual stations on a radio (ath9k), the total throughput becomes about 100 packets per second. It can run several thousands of packets per second with 10 or so stations. According to the xmit debugfs file, the radio is basically idle. It's queues are empty almost all of the time, few retransmits, etc. This is on the 3.0.26 kernel. If anyone has any ideas of what might need work, please let me know. I'll start digging into the code to see what I can see. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com