From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755792Ab0C3XJF (ORCPT ); Tue, 30 Mar 2010 19:09:05 -0400 Received: from kroah.org ([198.145.64.141]:48477 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755663Ab0C3XJC (ORCPT ); Tue, 30 Mar 2010 19:09:02 -0400 X-Mailbox-Line: From linux@linux.site Tue Mar 30 15:49:52 2010 Message-Id: <20100330224951.271498807@linux.site> User-Agent: quilt/0.47-14.9 Date: Tue, 30 Mar 2010 15:48:38 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Ingo Molnar , Greg Kroah-Hartman Subject: [18/45] sched: fine-tune SD_SIBLING_INIT In-Reply-To: <20100330230410.GA28712@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Ingo Molnar commit 52c642f33b14bfa1b00ef2b68296effb34a573f3 upstream. fine-tune the HT sched-domains parameters as well. On a HT capable box, this increases lat_ctx performance from 23.87 usecs to 1.49 usecs: # before $ ./lat_ctx -s 0 2 "size=0k ovr=1.89 2 23.87 # after $ ./lat_ctx -s 0 2 "size=0k ovr=1.84 2 1.49 Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- include/linux/topology.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -99,7 +99,7 @@ void arch_update_cpu_topology(void); | SD_BALANCE_FORK \ | SD_BALANCE_EXEC \ | SD_WAKE_AFFINE \ - | SD_WAKE_IDLE \ + | SD_WAKE_BALANCE \ | SD_SHARE_CPUPOWER, \ .last_balance = jiffies, \ .balance_interval = 1, \