Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753159AbbEHSXz (ORCPT ); Fri, 8 May 2015 14:23:55 -0400 Received: from mail-wg0-f41.google.com ([74.125.82.41]:35669 "EHLO mail-wg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752741AbbEHSXx (ORCPT ); Fri, 8 May 2015 14:23:53 -0400 Date: Fri, 8 May 2015 20:24:21 +0200 From: Frans Klaver To: linux cbon Cc: "linux-kernel@vger.kernel.org" Subject: Re: is kernel slower at loading for some hardware ? Message-ID: <20150508182421.GA1759@bugger.home> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1386 Lines: 35 On Tue, May 05, 2015 at 12:20:31AM +0100, linux cbon wrote: > On Mon, May 4, 2015 at 8:50 AM, Frans Klaver wrote: > > On Mon, May 4, 2015 at 7:21 AM, linux cbon wrote: > >> Hi, > >> during boot up, I am trying to find where the kernel takes more time > >> to do actions (is slower ?). > >> I looked at dmesg and found some places where it takes more time, but > >> not sure if this is normal : > (.......) > > All hardware is different and therefore initialization time can be > > different per component. Besides that, you're looking at something > > that depends on how verbose the driver's logs are. It may well be that > > the kernel is doing a lot of work, but just doesn't output anything > > that clears the minimum log level. > > Frans > > > Hi Frans, > I would like to have the maximal verbose logs, > can you please tell me what is the way to achieve this ? > And do you know the best way to find out where the kernel > is getting slow and is having problems ? > Thanks for your help. Maybe this page can help you further: http://elinux.org/Debugging_by_printing Good luck, Frans -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/