Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754639AbaFIHyD (ORCPT ); Mon, 9 Jun 2014 03:54:03 -0400 Received: from cantor2.suse.de ([195.135.220.15]:59222 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752570AbaFIHyB (ORCPT ); Mon, 9 Jun 2014 03:54:01 -0400 Date: Mon, 9 Jun 2014 09:53:58 +0200 From: Michal Hocko To: Felipe Contreras Cc: Linux Kernel Mailing List , "linux-mm@kvack.org" , Andrew Morton , Linus Torvalds , Mel Gorman , KAMEZAWA Hiroyuki , Rik van Riel Subject: Re: Interactivity regression since v3.11 in mm/vmscan.c Message-ID: <20140609075358.GA7144@dhcp22.suse.cz> References: <53905594d284f_71f12992fc6a@nysa.notmuch> <20140605133747.GB2942@dhcp22.suse.cz> <20140606091620.GC26253@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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 On Fri 06-06-14 18:11:14, Felipe Contreras wrote: > On Fri, Jun 6, 2014 at 5:33 AM, Felipe Contreras > wrote: > > On Fri, Jun 6, 2014 at 4:16 AM, Michal Hocko wrote: > > > >> Mel has a nice systemtap script (attached) to watch for stalls. Maybe > >> you can give it a try? > > > > Is there any special configurations I should enable? > > > > I get this: > > semantic error: unresolved arity-1 global array name, missing global > > declaration?: identifier 'name' at /tmp/stapd6pu9A:4:2 > > source: name[t]=execname() > > ^ > > > > Pass 2: analysis failed. [man error::pass2] > > Number of similar error messages suppressed: 71. > > Rerun with -v to see them. > > Unexpected exit of STAP script at > > /home/felipec/Downloads/watch-dstate-new.pl line 320. > > Actually I debugged the problem, and it's that the format of the > script is DOS, not UNIX. After changing the format the script works. Ups, I've downloaded it from our bugzilla so maybe it just did some tricks with the script. > However, it's not returning anything. It's running, but doesn't seem > to find any stalls. Intereting. It was quite good at pointing at stalls. How are you measuring those stalls during your testing? -- Michal Hocko SUSE Labs -- 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/