From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ig0-f175.google.com ([209.85.213.175]:60980 "EHLO mail-ig0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932083AbaIENEN (ORCPT ); Fri, 5 Sep 2014 09:04:13 -0400 Received: by mail-ig0-f175.google.com with SMTP id uq10so1032849igb.8 for ; Fri, 05 Sep 2014 06:04:12 -0700 (PDT) Date: Fri, 5 Sep 2014 09:03:25 -0400 From: Bob Copeland To: Dani Camps Cc: Johannes Berg , linux-wireless@vger.kernel.org Subject: Re: wmediumd performance penalty Message-ID: <20140905130325.GA26808@localhost> (sfid-20140905_150417_019868_A86E99BE) References: <1409597534.2703.9.camel@jlt4.sipsolutions.net> <1409644512.1808.2.camel@jlt4.sipsolutions.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Sep 02, 2014 at 10:06:30AM +0200, Dani Camps wrote: > Hi, > > OK, then the results I am getting are indeed surprising. To test > bandwidth I am using an iperf UDP transfer of 100Mbps and around 30 > Mbps is all it gets (without wmediumd). > > I will further test only mac80211_hwsim (without wmediumd), which I > believe can be used to set up topologies as well with the group > feature as described here: > https://github.com/cozybit/open80211s/wiki/HwsimTestTemplate Indeed you can. For what it's worth, although I can't speak for wmediumd at the moment, in the precursor to it that I wrote, I got about 25 Mbps achieved with a phy rate of 54 Mbps when simulating the physical layer, which I think is pretty close to real world overhead in non-agg case. With plain old mac80211_hwsim you can get several Gbps. -- Bob Copeland %% www.bobcopeland.com