From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.kapsi.fi ([217.30.184.167]:57023 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751290AbZIJOs1 (ORCPT ); Thu, 10 Sep 2009 10:48:27 -0400 Message-ID: <4AA911B6.2040301@iki.fi> Date: Thu, 10 Sep 2009 17:48:22 +0300 From: Antti Palosaari MIME-Version: 1.0 To: "Aleksandr V. Piskunov" CC: Markus Rechberger , Devin Heitmueller , Clinton Meyer , Linux Media Subject: Re: LinuxTV firmware blocks all wireless connections / traffic References: <62013cda0909091443g72ebdf1bge3994b545a86c854@mail.gmail.com> <829197380909091459x5367e95dnbd15f23e8377cf33@mail.gmail.com> <20090910091400.GA15105@moon> <20090910124549.GA18426@moon> <20090910124807.GB18426@moon> <4AA8FB2F.2040504@iki.fi> <20090910134139.GA20149@moon> <4AA9038B.8090404@iki.fi> In-Reply-To: <4AA9038B.8090404@iki.fi> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: On 09/10/2009 04:47 PM, Antti Palosaari wrote: > Aleksandr V. Piskunov wrote: >> On Thu, Sep 10, 2009 at 04:12:15PM +0300, Antti Palosaari wrote: >>> Aleksandr V. Piskunov wrote: >>>>> Here is a test case: >>>>> Two DVB-T USB adapters, dvb_usb_af9015 and dvb_usb_af9015. >>>>> Different tuners, >>>> Err, make it: dvb_usb_af9015 and dvb_usb_ce6230 >>> Those both uses currently too small bulk urbs, only 512 bytes. I have >>> asked suitable bulk urb size for ~20mbit/sec usb2.0 stream, but >>> no-one have answered yet (search ml back week or two). I think will >>> increase those to the 8k to reduce load. >>> >> >> Nice, I'm ready to test if such change helps. > > OK, I will make test version in couple of hours. Here it is, USB2.0 URB is now about 16k both af9015 and ce6230 devices. Now powertop shows only about 220 wakeups on my computer for the both sticks. Please test and tell what powertop says: http://linuxtv.org/hg/~anttip/urb_size/ I wonder if we can decide what URB size DVB USB drivers should follow and even add new module param for overriding driver default. Antti -- http://palosaari.fi/