From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Alessandro Suardi" Subject: Re: [2.6.16-gitX] heavy performance regression in ipw2200 wireless driver Date: Sat, 25 Mar 2006 23:48:29 +0100 Message-ID: <5a4c581d0603251448k1df0c7bdob1f7a2a39749a8be@mail.gmail.com> References: <5a4c581d0603221724m391f5466l8a2af3ae7f0aacae@mail.gmail.com> <20060322191057.304962a4.akpm@osdl.org> <5a4c581d0603230602s1a868a4apbfd79ec2bc568011@mail.gmail.com> <1143171674.17270.195.camel@debian.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Cc: "Andrew Morton" , linux-kernel@vger.kernel.org, "James Ketrenos" , netdev@vger.kernel.org Return-path: To: "Zhu Yi" In-Reply-To: <1143171674.17270.195.camel@debian.sh.intel.com> Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 3/24/06, Zhu Yi wrote: > On Thu, 2006-03-23 at 15:02 +0100, Alessandro Suardi wrote: > > That scp test shows 50%ish - but that was a quickie. The VNC > > client even reported a 719Kbps throughput down from the more > > usual 11500Kbps it starts off with. The first scp I tried when the > > sluggishness was intolerable was going at 200KB/s - which > > shows the problem can easily get in the neighborhood of an > > order of magnitude. > > What kind of wireless encryption do you use? We turned off hardware > encryption by default recently as a workaround for a firmware restart > bug. You might want to load module with "modprobe ipw2200 hwcrypto=1" > and retest. The issue seems to have vanished in more recent kernel snapshots (namely, 2.6.16-git3 and -git5 exhibited the problem; -git8 and -git9 did not). I will holler if the problem pops up again... thanks, --alessandro "Dreamer ? Each one of us is a dreamer. We just push it down deep because we are repeatedly told that we are not allowed to dream in real life" (Reinhold Ziegler)