From owner-freebsd-questions@FreeBSD.ORG Tue Apr 5 09:09:07 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0DD3A16A4CE for ; Tue, 5 Apr 2005 09:09:07 +0000 (GMT) Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by mx1.FreeBSD.org (Postfix) with SMTP id 0345943D41 for ; Tue, 5 Apr 2005 09:09:06 +0000 (GMT) (envelope-from emanuel.strobl@gmx.net) Received: (qmail invoked by alias); 05 Apr 2005 09:09:04 -0000 Received: from flb.schmalzbauer.de (EHLO cale.flintsbach.schmalzbauer.de) [62.245.232.135] by mail.gmx.net (mp023) with SMTP; 05 Apr 2005 11:09:04 +0200 X-Authenticated: #301138 From: Emanuel Strobl To: freebsd-questions@freebsd.org Date: Tue, 5 Apr 2005 11:08:45 +0200 User-Agent: KMail/1.7.2 References: <20050404091719.GA9748@lothlorien.nagual.st> <20050404093755.GA48928@epia2.farid-hajji.net> <4251C915.1000009@cloudview.com> In-Reply-To: <4251C915.1000009@cloudview.com> X-Birthday: 10/06/72 X-CelPhone: +49 173 9967781 X-Tel: +49 89 18947781 X-Country: Germany X-Address: Munich, 80686 X-OS: FreeBSD MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1449514.Fqht2bjg9s"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200504051109.01670@harrymail> X-Y-GMX-Trusted: 0 cc: John Pettitt cc: cpghost@cordula.ws Subject: Re: HZ=1000 ? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Apr 2005 09:09:07 -0000 --nextPart1449514.Fqht2bjg9s Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Am Dienstag, 5. April 2005 01:09 schrieb John Pettitt: > cpghost@cordula.ws wrote: > >Interestingly, HZ=3D100 has remained constant for decades (!), despite > >CPUs getting faster all the time. This is an excellent value for most > >typical usage patterns. Cranking it up should only be required for > >special cases. Anyway, the HZ knob is there. Experiment with it until > >you get optimal performance. > > In the dim and distant past (like 1983) some systems used HZ=3D50 or HZ= =3D60 > depending on where in the world they were. I used an MP/M based box > that took it's clock tick from the power line (no good RTC hardware Hmm, I've seen onboard RTCs which surely were less acurate than a=20 power-line-driven oscillator was ;) Some RTCs are really bad. But at least= =20 here in germany power line frequency is astonishing acurate. We also have a= =20 broadcast station which generates it's 50Hz vertical refresh rate from a=20 dedicated caesium clock. Of course this tv station is paid by the peoples..= =2E. Sorry, a bit OT, but I'm really impressed how constant power line frequency= =20 is. =2DHarry > available but the power company keeps pretty good time). > > John > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" --nextPart1449514.Fqht2bjg9s Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQBCUlWtBylq0S4AzzwRAinhAKCNCE+ruXGU6hYWrDvYBg71ngVPRwCdFCn0 7Xm5jfUxZiUhwRPKMY61qzw= =Yi52 -----END PGP SIGNATURE----- --nextPart1449514.Fqht2bjg9s--