From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755427AbcFQIov (ORCPT ); Fri, 17 Jun 2016 04:44:51 -0400 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:23389 "EHLO mx0a-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752337AbcFQIor (ORCPT ); Fri, 17 Jun 2016 04:44:47 -0400 Date: Fri, 17 Jun 2016 16:40:54 +0800 From: Jisheng Zhang To: , , , Subject: Re: regression caused by 08f511fd41c3 ("cpufreq: Reduce cpufreq_update_util() overhead a bit") Message-ID: <20160617164054.6339c5d4@xhacker> In-Reply-To: <20160617163023.5bb374f8@xhacker> References: <20160617163023.5bb374f8@xhacker> X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.30; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-06-17_05:,, signatures=0 X-Proofpoint-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1606170107 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear all, On Fri, 17 Jun 2016 16:30:23 +0800 Jisheng Zhang wrote: > Dear all, > > I found one regression: In an idle system, wakeups/s (reported by powertop) > is increased a lot, e.g on a intel snb 4 core platform, the wakeup event > number is increased from 8 wakeups/s to 24 wakeup/s. bisect points to > this commit. I could send detailed bisect log if it's wanted. > more information maybe useful: after the commit, the top two wakeup source are Process [rcu_sched] Timer tick_sched_timer thanks