From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus Torvalds Subject: Re: Performance issue of 'git branch' Date: Wed, 22 Jul 2009 19:28:40 -0700 (PDT) Message-ID: References: <20090722235914.GA13150@Pilar.aei.mpg.de> <20090723020238.GA8948@Pilar.aei.mpg.de> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: git@vger.kernel.org To: "Carlos R. Mafra" X-From: git-owner@vger.kernel.org Thu Jul 23 04:29:25 2009 Return-path: Envelope-to: gcvg-git-2@gmane.org Received: from vger.kernel.org ([209.132.176.167]) by lo.gmane.org with esmtp (Exim 4.50) id 1MTo3g-0008Nh-4h for gcvg-git-2@gmane.org; Thu, 23 Jul 2009 04:29:24 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752786AbZGWC3P (ORCPT ); Wed, 22 Jul 2009 22:29:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752761AbZGWC3O (ORCPT ); Wed, 22 Jul 2009 22:29:14 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:52237 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752728AbZGWC3O (ORCPT ); Wed, 22 Jul 2009 22:29:14 -0400 Received: from imap1.linux-foundation.org (imap1.linux-foundation.org [140.211.169.55]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id n6N2SeTV031423 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 22 Jul 2009 19:28:42 -0700 Received: from localhost (localhost [127.0.0.1]) by imap1.linux-foundation.org (8.13.5.20060308/8.13.5/Debian-3ubuntu1.1) with ESMTP id n6N2Se0m017721; Wed, 22 Jul 2009 19:28:40 -0700 X-X-Sender: torvalds@localhost.localdomain In-Reply-To: <20090723020238.GA8948@Pilar.aei.mpg.de> User-Agent: Alpine 2.01 (LFD 1184 2008-12-16) X-Spam-Status: No, hits=-3.461 required=5 tests=AWL,BAYES_00 X-Spam-Checker-Version: SpamAssassin 3.2.4-osdl_revision__1.47__ X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.13 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: On Thu, 23 Jul 2009, Carlos R. Mafra wrote: > > Is there another way to check what is going on with that anomalous lstat()? I really don't think it's the lstat any more. Your directories look small and simple, and clearly the indexing made no difference. See earlier email about using "strace -T" instead of "-tt". Also, I sent you a patch to try out just a minute ago, I think that may be it. > [ perhaps I will try 'perf' after I read how to use it ] I really like 'perf' (it does what oprofile did for me, but without the headaches), but it doesn't help with IO profiling. I've actually often wanted to have a 'strace' that shows page faults as special system calls, but it's sadly nontrivial ;( Linus