From owner-freebsd-questions@FreeBSD.ORG Fri Nov 25 00:09:45 2005 Return-Path: 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 EC9C116A41F for ; Fri, 25 Nov 2005 00:09:44 +0000 (GMT) (envelope-from wojtek@tensor.3miasto.net) Received: from chylonia.3miasto.net (chylonia.3miasto.net [213.192.74.6]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3C25F43DAB for ; Fri, 25 Nov 2005 00:08:54 +0000 (GMT) (envelope-from wojtek@tensor.3miasto.net) Received: from chylonia.3miasto.net (localhost [127.0.0.1]) by chylonia.3miasto.net (8.13.4/8.13.4) with ESMTP id jAP08h47086792; Fri, 25 Nov 2005 01:08:43 +0100 (CET) (envelope-from wojtek@tensor.3miasto.net) Received: from localhost (wojtek@localhost) by chylonia.3miasto.net (8.13.4/8.13.4/Submit) with ESMTP id jAP08go1086789; Fri, 25 Nov 2005 01:08:43 +0100 (CET) (envelope-from wojtek@tensor.3miasto.net) X-Authentication-Warning: chylonia.3miasto.net: wojtek owned process doing -bs Date: Fri, 25 Nov 2005 01:08:42 +0100 (CET) From: Wojciech Puchar X-X-Sender: wojtek@chylonia.3miasto.net To: Kris Kennaway In-Reply-To: <20051124204359.GD30073@xor.obsecurity.org> Message-ID: <20051125010708.B86615@chylonia.3miasto.net> References: <20051124013438.T8326@chylonia.3miasto.net> <20051124204359.GD30073@xor.obsecurity.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-questions@freebsd.org, Markus Trippelsdorf Subject: Re: so much clock interrupts?! X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Nov 2005 00:09:45 -0000 >> That's why I have kern.hz="100" in my /boot/loader.conf . > > Have you been able to measure a performance benefit from reducing it? > Have you shown that reducing it does not cause your performance to > *drop*? It was increased for a reason..it actually increases > performance on some workloads. > no i'm just asking. does hz=1000 means that if i run >1 CPU-bound process per processor it's switched 1000 times per second between them? or just 1000 times per second system call is issued that does many system duties, but switches processes with different frequency?