From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gary Thomas Subject: Re: PM related performance degradation on OMAP3 Date: Thu, 12 Apr 2012 11:10:05 -0600 Message-ID: <4F870C6D.3030203@mlbassoc.com> References: <4F859C5D.3090400@mlbassoc.com> <87hawqt6vt.fsf@ti.com> <4F86B227.90802@mlbassoc.com> <87aa2hjavi.fsf@ti.com> <4F86F4B2.3080101@mlbassoc.com> <87aa2ganwj.fsf@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from hermes.mlbassoc.com ([64.234.241.98]:52204 "EHLO mail.chez-thomas.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756578Ab2DLRKH (ORCPT ); Thu, 12 Apr 2012 13:10:07 -0400 In-Reply-To: <87aa2ganwj.fsf@ti.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Kevin Hilman Cc: Grazvydas Ignotas , linux-omap@vger.kernel.org, Paul Walmsley , Felipe Balbi On 2012-04-12 10:57, Kevin Hilman wrote: > +Felipe for EHCI question > > Gary Thomas writes: > > [...] > >> This worked a treat, thanks. My network performance is better >> now, but still not what it was. The same TFTP transfer now takes >> 71 seconds, so about 50% slower than on the 3.0 kernel. Applying the >> second [unnamed] patch (arch/arm/mach-omap2/cpuidle34xx.c) made no difference. > > And does a CONFIG_PM=n kernel get you back to your v3.0 performance? Correct. > >> I am interested in having PM working as I'm designing a battery powered >> portable unit, so I need to keep pursuing this. > > So do I. :) > >> Note: I noticed that when I built with CONFIG_PM off and no other >> changes, my EHCI USB didn't work properly. Should this be the case? > > Probably not, but haven't tested EHCI USB. I've Cc'd Felipe to see if > he has any ideas why EHCI wouldn't work with CONFIG_PM=n. Thanks -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------