From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 3CBC76B0012 for ; Wed, 15 Jun 2011 06:59:16 -0400 (EDT) Subject: Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex From: Peter Zijlstra In-Reply-To: <1308134200.15315.32.camel@twins> References: <1308097798.17300.142.camel@schen9-DESK> <1308134200.15315.32.camel@twins> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Date: Wed, 15 Jun 2011 12:58:15 +0200 Message-ID: <1308135495.15315.38.camel@twins> Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Tim Chen Cc: Andrew Morton , Linus Torvalds , Hugh Dickins , KOSAKI Motohiro , Benjamin Herrenschmidt , David Miller , Martin Schwidefsky , Russell King , Paul Mundt , Jeff Dike , Richard Weinberger , Tony Luck , KAMEZAWA Hiroyuki , Mel Gorman , Nick Piggin , Namhyung Kim , ak@linux.intel.com, shaohua.li@intel.com, alex.shi@intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Rafael J. Wysocki" , paulmck On Wed, 2011-06-15 at 12:36 +0200, Peter Zijlstra wrote: > On Tue, 2011-06-14 at 17:29 -0700, Tim Chen wrote: > > MOSBENCH test suite. >=20 > Argh, I'm trying to get this thing to run, but its all snake poo.. >=20 > /me takes up a heavy club and goes snake hunting, should make a pretty > hat or something. Sweet, I've got meself a snake-skin hat! The first thing that stood out when running it was: 31694 root 20 0 26660 1460 1212 S 17.5 0.0 0:01.97 exim=20 7 root -2 19 0 0 0 S 12.7 0.0 0:06.14 rcuc0=20 24 root -2 19 0 0 0 S 11.7 0.0 0:04.15 rcuc3=20 34 root -2 19 0 0 0 S 11.7 0.0 0:04.10 rcuc5=20 39 root -2 19 0 0 0 S 11.7 0.0 0:06.38 rcuc6=20 44 root -2 19 0 0 0 S 11.7 0.0 0:04.53 rcuc7=20 49 root -2 19 0 0 0 S 11.7 0.0 0:04.11 rcuc8=20 79 root -2 19 0 0 0 S 11.7 0.0 0:03.91 rcuc14=20 89 root -2 19 0 0 0 S 11.7 0.0 0:03.90 rcuc16=20 110 root -2 19 0 0 0 S 11.7 0.0 0:03.90 rcuc20=20 120 root -2 19 0 0 0 S 11.7 0.0 0:03.82 rcuc22=20 13 root -2 19 0 0 0 S 10.7 0.0 0:04.37 rcuc1=20 19 root -2 19 0 0 0 S 10.7 0.0 0:04.19 rcuc2=20 29 root -2 19 0 0 0 S 10.7 0.0 0:04.12 rcuc4=20 54 root -2 19 0 0 0 S 10.7 0.0 0:04.11 rcuc9=20 59 root -2 19 0 0 0 S 10.7 0.0 0:04.40 rcuc10=20 64 root -2 19 0 0 0 R 10.7 0.0 0:04.17 rcuc11=20 69 root -2 19 0 0 0 R 10.7 0.0 0:04.23 rcuc12=20 84 root -2 19 0 0 0 S 10.7 0.0 0:03.90 rcuc15=20 95 root -2 19 0 0 0 S 10.7 0.0 0:03.99 rcuc17=20 100 root -2 19 0 0 0 S 10.7 0.0 0:03.88 rcuc18=20 105 root -2 19 0 0 0 S 10.7 0.0 0:04.14 rcuc19=20 125 root -2 19 0 0 0 S 10.7 0.0 0:03.79 rcuc23=20 74 root -2 19 0 0 0 S 9.7 0.0 0:04.33 rcuc13=20 115 root -2 19 0 0 0 R 9.7 0.0 0:03.82 rcuc21=20 Which is an impressive amount of RCU usage.. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org