Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1759045AbcDHWTU (ORCPT <rfc822;w@1wt.eu>);
	Fri, 8 Apr 2016 18:19:20 -0400
Received: from cmta2.telus.net ([209.171.16.75]:58065 "EHLO cmta2.telus.net"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1753827AbcDHWTS (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Fri, 8 Apr 2016 18:19:18 -0400
X-Authority-Analysis: v=2.1 cv=GZDq5ljL c=1 sm=2 tr=0
 a=zJWegnE7BH9C0Gl4FFgQyA==:117 a=zJWegnE7BH9C0Gl4FFgQyA==:17
 a=L9H7d07YOLsA:10 a=9cW_t1CCXrUA:10 a=s5jvgZ67dGcA:10
 a=Pyq9K9CWowscuQLKlpiwfMBGOR0=:19 a=IkcTkHD0fZMA:10 a=rR8FnchBvaEDZOWsCfMA:9
 a=QEXdDO2ut3YA:10
X-Telus-Outbound-IP: 173.180.45.4
From: "Doug Smythies" <dsmythies@telus.net>
To: "'Mike Galbraith'" <umgwanakikbuti@gmail.com>
Cc: "'Peter Zijlstra'" <peterz@infradead.org>,
        "'Rafael J. Wysocki'" <rafael.j.wysocki@intel.com>,
        "'LKML'" <linux-kernel@vger.kernel.org>,
        "'Linux PM list'" <linux-pm@vger.kernel.org>,
        "'Rik van Riel'" <riel@redhat.com>,
        "'Rafael J. Wysocki'" <rjw@rjwysocki.net>
References: <1460092854.4051.1.camel@gmail.com> <20160408064510.GK3448@twins.programming.kicks-ass.net> <1460098254.5582.17.camel@gmail.com> <2428384.mEkP3EOpsR@vostro.rjw.lan>
In-Reply-To: <2428384.mEkP3EOpsR@vostro.rjw.lan>
Subject: RE: [regression] cross core scheduling frequency drop bisected to 0c313cb20732
Date: Fri, 8 Apr 2016 15:19:14 -0700
Message-ID: <001101d191e4$b00602d0$10120870$@net>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="utf-8"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: AdGR2UC1ZFfNY+DvRB+QHJfu26p9PQACpfZw
Content-Language: en-ca
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 706
Lines: 24

On 2016.04.08 14:00 Rafael J. Wysocki wrote:
> On Friday, April 08, 2016 08:50:54 AM Mike Galbraith wrote:
>> On Fri, 2016-04-08 at 08:45 +0200, Peter Zijlstra wrote:
>> 
>>> Cute, I thought you used governor=performance for your runs?
>> 
>> I do, and those numbers are with it thus set.

> Well, this is a trade-off.
>
> 4.5 introduced a power regression here so this one goes back to the previous
> state of things.

Mike:

Could you send me, or point me to, the program "pipe-test"?
So far, I have only found one, but it is both old and not
the same program you are running (based on print statements).

I realize I might not be to recreate your problem scenario anyhow,
I just want to try.

... Doug