From owner-svn-src-all@FreeBSD.ORG  Tue May 20 16:27:06 2014
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 0F001772;
 Tue, 20 May 2014 16:27:06 +0000 (UTC)
Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id BA42826B6;
 Tue, 20 May 2014 16:27:05 +0000 (UTC)
Received: from slw by zxy.spb.ru with local (Exim 4.82 (FreeBSD))
 (envelope-from <slw@zxy.spb.ru>)
 id 1WmmsT-0006nv-E4; Tue, 20 May 2014 20:26:57 +0400
Date: Tue, 20 May 2014 20:26:57 +0400
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Adrian Chadd <adrian@freebsd.org>
Subject: Re: svn commit: r265792 - head/sys/kern
Message-ID: <20140520162657.GG3327@zxy.spb.ru>
References: <201405100053.s4A0rbF9080571@svn.freebsd.org>
 <20140511083114.GA53503@zxy.spb.ru>
 <CAJ-Vmo=x-JkHSVDT4REWQ_g=vb45T+TfrpZ8bc28NNbPd-ZYsg@mail.gmail.com>
 <20140520154113.GA23318@zxy.spb.ru>
 <CAJ-Vmonby1MVuuJnWoXcPh1cTE1q0SQEQhfL_ESzoDEWHtKcCw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAJ-Vmonby1MVuuJnWoXcPh1cTE1q0SQEQhfL_ESzoDEWHtKcCw@mail.gmail.com>
User-Agent: Mutt/1.5.22 (2013-10-16)
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: slw@zxy.spb.ru
X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false
Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>,
 "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>,
 "src-committers@freebsd.org" <src-committers@freebsd.org>
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 20 May 2014 16:27:06 -0000

On Tue, May 20, 2014 at 09:04:25AM -0700, Adrian Chadd wrote:

> On 20 May 2014 08:41, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:
> 
> >> (But if you try it on 10.0 and it changes things, by all means let me know.)
> >
> > I am try on 10.0, but not sure about significant improvement (may be
> > 10%).
> >
> > For current CPU (E5-2650 v2 @ 2.60GHz) hwpmc don't working (1. after
> > collect some data `pmcstat -R sample.out -G out.txt` don't decode any;
> > 2. kldunload hwpmc do kernel crash) and I can't collect detailed
> > profile information.
> 
> Yup. I'm starting to get really ticked off at how pmc logging on
> multi-core devices just "stops" after a while. I'll talk with other
> pmc people and see if we can figure out what the heck is going on. :(

pmc work on E5-2620 @ 2.00GHz (NOT E5 _v2_)