From owner-freebsd-threads@FreeBSD.ORG Tue Jul 6 17:47:07 2004 Return-Path: Delivered-To: freebsd-threads@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 36FF716A4DD for ; Tue, 6 Jul 2004 17:47:06 +0000 (GMT) Received: from rwcrmhc11.comcast.net (rwcrmhc11.comcast.net [204.127.198.35]) by mx1.FreeBSD.org (Postfix) with ESMTP id BB84843D1F for ; Tue, 6 Jul 2004 17:47:06 +0000 (GMT) (envelope-from julian@elischer.org) Received: from interjet.elischer.org ([24.7.73.28]) by comcast.net (rwcrmhc11) with ESMTP id <2004070617470501300jdg6ee>; Tue, 6 Jul 2004 17:47:06 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id KAA64731; Tue, 6 Jul 2004 10:47:04 -0700 (PDT) Date: Tue, 6 Jul 2004 10:47:02 -0700 (PDT) From: Julian Elischer To: Andrew Gallatin In-Reply-To: <16618.52660.343754.933037@grasshopper.cs.duke.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-threads@freebsd.org Subject: Re: pthread switch (was Odd KSE panic) X-BeenThere: freebsd-threads@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Threading on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Jul 2004 17:47:09 -0000 On Tue, 6 Jul 2004, Andrew Gallatin wrote: > > FWIW, inserting a pthread_yield() just before the ioctl call in the > worker thread speeds things up quite a bit (100us -> 73us) in > combination with kern.threads.virtual_cpu=1. what about with kern.threads.virtual_cpu untouched? and what about with the hlt sysctl? does your worker thread loop to check if there is more work before waiting to be notified? > > Drew >