From owner-freebsd-current@FreeBSD.ORG Tue Mar 9 09:57:18 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0AFA516A4CE; Tue, 9 Mar 2004 09:57:18 -0800 (PST) Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id EF64D43D41; Tue, 9 Mar 2004 09:57:17 -0800 (PST) (envelope-from dwhite@gumbysoft.com) Received: by carver.gumbysoft.com (Postfix, from userid 1000) id D906072DCB; Tue, 9 Mar 2004 09:57:17 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by carver.gumbysoft.com (Postfix) with ESMTP id D412B72DB5; Tue, 9 Mar 2004 09:57:17 -0800 (PST) Date: Tue, 9 Mar 2004 09:57:17 -0800 (PST) From: Doug White To: Alfred Perlstein In-Reply-To: <20040309071912.GM56622@elvis.mu.org> Message-ID: <20040309095540.U69332@carver.gumbysoft.com> References: <20040309071912.GM56622@elvis.mu.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: current@freebsd.org Subject: Re: diagnosing interrupt storms? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Mar 2004 17:57:18 -0000 On Mon, 8 Mar 2004, Alfred Perlstein wrote: > At a certain point after booting my SMP 5-current box gets all > weird, typically I see 50%+ time spent in interrupt. If I run "top > -S" I typically see one of the ithreads using 50% cpu. > > I'm trying to figure out what it's doing, what has gone wrong etc. > > Are there any sysctls to look at or things I can do to diagnose > this? vmstat -i is useful for figuring out exactly which interrupt is storming, although the ithread might hint it too. Which one is it? -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org