From owner-freebsd-hackers@FreeBSD.ORG Mon Nov 17 15:42:25 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C1AFC106564A for ; Mon, 17 Nov 2008 15:42:25 +0000 (UTC) (envelope-from murat@enderunix.org) Received: from istanbul.enderunix.org (freefall.marmara.edu.tr [193.140.143.23]) by mx1.freebsd.org (Postfix) with ESMTP id EAC068FC18 for ; Mon, 17 Nov 2008 15:42:24 +0000 (UTC) (envelope-from murat@enderunix.org) Received: (qmail 37680 invoked from network); 17 Nov 2008 15:14:12 -0000 Received: from unknown (HELO ?10.1.0.13?) (127.0.0.1) by 0 with SMTP; 17 Nov 2008 15:14:12 -0000 From: Murat Balaban To: freebsd-hackers@freebsd.org Organization: EnderUNIX SDT Date: Mon, 17 Nov 2008 17:14:21 +0200 Message-Id: <1226934861.6310.25.camel@efe> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Giant lock, bce and uhc using the same irq X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Nov 2008 15:42:25 -0000 Hello hackers, In one of my production servers (64-bit Intel Xeon machine) running 6.3-RELEASE-p4 (amd64) FreeBSD 6.3-RELEASE-p4 #0: Fri Sep 12 17:07:19 EEST 2008 I see this "top -S" output excerpt: 32 root 1 -68 -187 0K 16K *Giant 0 48.3H 3.08% irq17: bce1 uhci1 What I get from above is that bce and uhc drivers both use irq17. I assume bce is SMPng'ed, and uhc is not. Does uhc being Giant locked, affect bce performance, because they use the same interrupt handler thread? -- Murat http://www.enderunix.org/murat/