From owner-freebsd-questions@FreeBSD.ORG  Thu Nov 24 02:39:30 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
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 5D2AD16A41F
	for <freebsd-questions@freebsd.org>;
	Thu, 24 Nov 2005 02:39:30 +0000 (GMT)
	(envelope-from kris@obsecurity.org)
Received: from elvis.mu.org (elvis.mu.org [192.203.228.196])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4AA0A43D5F
	for <freebsd-questions@freebsd.org>;
	Thu, 24 Nov 2005 02:39:29 +0000 (GMT)
	(envelope-from kris@obsecurity.org)
Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196])
	by elvis.mu.org (Postfix) with ESMTP id 0B64F1A3C1C;
	Wed, 23 Nov 2005 18:39:29 -0800 (PST)
Received: by obsecurity.dyndns.org (Postfix, from userid 1000)
	id 534CC519E7; Wed, 23 Nov 2005 21:39:28 -0500 (EST)
Date: Wed, 23 Nov 2005 21:39:28 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Wojciech Puchar <wojtek@tensor.3miasto.net>
Message-ID: <20051124023928.GA13075@xor.obsecurity.org>
References: <20051124013438.T8326@chylonia.3miasto.net>
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="+HP7ph2BbKc20aGI"
Content-Disposition: inline
In-Reply-To: <20051124013438.T8326@chylonia.3miasto.net>
User-Agent: Mutt/1.4.2.1i
Cc: freebsd-questions@freebsd.org
Subject: Re: so much clock interrupts?!
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 24 Nov 2005 02:39:30 -0000


--+HP7ph2BbKc20aGI
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Thu, Nov 24, 2005 at 01:35:41AM +0100, Wojciech Puchar wrote:
> that's what i see in systat with FreeBSD 6.0/i386-SMP
>=20
>=20
>       540      534   99                                   pdwak  2000 cpu=
0:=20
>       time
>                                                     16825 pdpgs  2000 cpu=
1:=20
>                                                     time
>=20
>=20
> on FreeBSD 5.3 live CD i have 100 not 2000 times per second
>=20
> isn't it too much?!

No, it's just a consequence of HZ=3D1000 instead of HZ=3D100.  I've
measured this carefully and I can't see it causing a penalty on my
workloads.  It apparently gives a benefit on machines that do a lot of
network I/O.

Kris

--+HP7ph2BbKc20aGI
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2 (FreeBSD)

iD8DBQFDhSffWry0BWjoQKURAi+EAJ92xjXMJfU+4kknmmNZYM6A+OZD4QCffgxS
Mjeyz7sVnmBEverLq0O9qR0=
=3D++
-----END PGP SIGNATURE-----

--+HP7ph2BbKc20aGI--