From owner-freebsd-arch@freebsd.org  Fri Jun  3 10:09:48 2016
Return-Path: <owner-freebsd-arch@freebsd.org>
Delivered-To: freebsd-arch@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5D01FB66AC4;
 Fri,  3 Jun 2016 10:09:48 +0000 (UTC)
 (envelope-from pieter@degoeje.nl)
Received: from degoeje.nl (degoeje.nl [81.169.238.128])
 by mx1.freebsd.org (Postfix) with ESMTP id 245B41878;
 Fri,  3 Jun 2016 10:09:47 +0000 (UTC)
 (envelope-from pieter@degoeje.nl)
Received: from [192.168.1.250] (unknown [188.203.228.182])
 by degoeje.nl (Postfix) with ESMTPSA id 1BD4115C0025;
 Fri,  3 Jun 2016 12:09:39 +0200 (CEST)
Subject: Re: CLOCK_MONOTONIC / CLOCK_UPTIME is not really monotonic between
 threads
To: Maxim Sobolev <sobomax@FreeBSD.org>,
 FreeBSD Current <freebsd-current@freebsd.org>, freebsd-threads@freebsd.org,
 freebsd-questions@freebsd.org, freebsd-arch@freebsd.org
References: <CAH7qZfsBLM_wqdTXiiyVvevwU+u257dX9JvZFftfntduUaZDMw@mail.gmail.com>
From: Pieter de Goeje <pieter@degoeje.nl>
Message-ID: <d199e53e-cdbc-ae96-94ed-6c282218c7ad@degoeje.nl>
Date: Fri, 3 Jun 2016 12:09:38 +0200
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101
 Thunderbird/45.1.0
MIME-Version: 1.0
In-Reply-To: <CAH7qZfsBLM_wqdTXiiyVvevwU+u257dX9JvZFftfntduUaZDMw@mail.gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-Spam-Status: No, score=-1.0 required=3.5 tests=ALL_TRUSTED autolearn=ham
 autolearn_force=no version=3.4.0
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on degoeje.nl
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch/>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 03 Jun 2016 10:09:48 -0000

Op 2016-06-03 om 06:16 schreef Maxim Sobolev:
> 4. If the answer for (3) is yes, then what is the method to disable using
> TSC and use slower but possibly more reliable method?

sysctl kern.timecounter.choice lists the available timers.
sysctl kern.timecounter.hardware selects the timer. Changes take effect 
immediately.

- Pieter