From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,8c564a80b820db35
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Received: by 10.68.220.229 with SMTP id pz5mr7557403pbc.5.1331061018794;
        Tue, 06 Mar 2012 11:10:18 -0800 (PST)
Path: 
 h9ni46882pbe.0!nntp.google.com!news1.google.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
From: Shark8 <onewingedshark@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Any leap year issues caused by Ada yesterday?
Date: Tue, 6 Mar 2012 11:08:37 -0800 (PST)
Organization: http://groups.google.com
Message-ID: <9778287.445.1331060917464.JavaMail.geo-discussion-forums@ynes7>
References: <4f4f746a$0$6565$9b4e6d93@newsspool3.arcor-online.net>
 <abdf6306-50b4-43ed-9e18-3c57c1e97160@9g2000vbq.googlegroups.com>
 <20608866.730.1330963171058.JavaMail.geo-discussion-forums@ynbq18>
 <1t8v4akrmapkl.1xwfi9yxtw2ji$.dlg@40tude.net> <m2eht6j3xl.fsf@pushface.org>
 <msh09luylmxz$.qdnnl7pz5j14.dlg@40tude.net> <m2aa3uix7a.fsf@pushface.org>
 <18ghv3yeh1a1k$.1bjwdaps59rt3$.dlg@40tude.net> <m262eihyq0.fsf@pushface.org>
 <d37aucb0avr1$.ihxbw6kqhx1e$.dlg@40tude.net> <m21up5isno.fsf@pushface.org>
 <z3eblji2o1wx.1ts993li80h61$.dlg@40tude.net>
NNTP-Posting-Host: 24.230.151.194
Mime-Version: 1.0
X-Trace: posting.google.com 1331061018 10824 127.0.0.1 (6 Mar 2012 19:10:18
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Tue, 6 Mar 2012 19:10:18 +0000 (UTC)
Cc: mailbox@dmitry-kazakov.de
In-Reply-To: <z3eblji2o1wx.1ts993li80h61$.dlg@40tude.net>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=24.230.151.194;
 posting-account=lJ3JNwoAAAAQfH3VV9vttJLkThaxtTfC
User-Agent: G2/1.0
Content-Type: text/plain; charset=ISO-8859-1
Date: 2012-03-06T11:08:37-08:00
List-Id: <comp.lang.ada>

On Tuesday, March 6, 2012 11:37:35 AM UTC-6, Dmitry A. Kazakov wrote:
> 
> If the sources of the TSC and of the system clock are different, then there
> is a systematic error. I suppose this is the major reason why it did not
> work under VxWorks. The system time must be derived from the same quartz.
> Otherwise you have to compensate the deviation, which could well be as big
> as 5 microseconds per second.

Really? I thought the whole point of using Quartz crystals was because they vibrate at a precise rate; or is the problem analogous to the "beats" that you hear when two musical instruments* are slightly out of tune?

(*Guitar comes immediately to mind; especially as it uses that as part of the tuning process.)