From owner-freebsd-stable@FreeBSD.ORG Mon Jul 21 14:29:04 2014 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8B50E8AF for ; Mon, 21 Jul 2014 14:29:04 +0000 (UTC) Received: from mail-qc0-x22b.google.com (mail-qc0-x22b.google.com [IPv6:2607:f8b0:400d:c01::22b]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 451F82C1B for ; Mon, 21 Jul 2014 14:29:04 +0000 (UTC) Received: by mail-qc0-f171.google.com with SMTP id i17so5554156qcy.2 for ; Mon, 21 Jul 2014 07:29:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:references:mime-version:in-reply-to:content-type :content-transfer-encoding:message-id:cc:subject:date:to; bh=Yq7TtFT5hJgjKtLOSNUTAWqRWKJLhZ2SqVaJh/0Ej6c=; b=iNdJ/+kJkqJvWlsKqx5GeV6ipD6KIkcVL9qBWQGBZnNyq6JKj6hQAcoeBCn/Z/1A/2 qMKtqmpBHj1oICJTOF/PCs3LE0nCmzmh8laWFmRWpZFTHIZK9Zr4FLYbkr9bhWt31MI+ vQowz/XsKfXmRPmqjnwwaEZC/FB5WQW6hXENuCgUpOqK28w0k8LyNbqiP5GEG1EXLBzO EBhUBtAI4NOdifPqTnm5OJ8FqDwyQ0kYiIpSRktbDsGjRhCDgYvI7iMyYFKl5XoRUUfN 0OA3WOiR+GdQiOlbI6dVgnzPo/dUfHeaJjicjobcWSkmvJgFas84ult0lsZ/M8TmUk+6 aSMw== X-Received: by 10.229.212.68 with SMTP id gr4mr41848641qcb.25.1405952940954; Mon, 21 Jul 2014 07:29:00 -0700 (PDT) Received: from [192.168.1.2] (pool-173-48-147-104.bstnma.fios.verizon.net. [173.48.147.104]) by mx.google.com with ESMTPSA id l76sm16287971qga.8.2014.07.21.07.28.56 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 21 Jul 2014 07:28:59 -0700 (PDT) From: Edwin Brown X-Google-Original-From: Edwin Brown References: <20140720062413.GA56318@icarus.home.lan> <201407210348.s6L3mHnF020806@hergotha.csail.mit.edu> Mime-Version: 1.0 (1.0) In-Reply-To: <201407210348.s6L3mHnF020806@hergotha.csail.mit.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message-Id: <72ABE5EB-9F5C-45E6-9FD2-8C3113398528@gmail.com> X-Mailer: iPhone Mail (11D257) Subject: Re: Consistently "high" CPU load on 10.0-STABLE Date: Mon, 21 Jul 2014 10:28:56 -0400 To: Garrett Wollman Cc: "jdc@koitsu.org" , "stable@freebsd.org" X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 Jul 2014 14:29:04 -0000 I've also seen this behavior in 10.0 stable. Currently running r268853.=20 I've had the same behavior since 10.0 release and never thought much about i= t other than the fact that it didn't seem "normal".=20 This machine is a test machine and I'd be happy to run some tests for people= if that might help. My kernel debugging skills are limited. But I have som= e spare time and a computer I can destroy if need be=20 Thanks=20 Ed=20 > On Jul 20, 2014, at 11:48 PM, Garrett Wollman wrote: >=20 > In article <20140720235945.GA90603@icarus.home.lan> you write: >=20 >> Yeah, I've given that a try. I think all that script does, in layman's >> terms, is count the number of occurrences of a kernel function/symbol >> being called. >=20 > I've had good results in the past using pmcstat(8) in "top" mode. Of > course you'll need a kernel with the PMC support compiled in to use > that, and a CPU where hwpmc(4) supports a useful counter -- I'd start > with something that counts unhalted cycles or retired instructions. >=20 > -GAWollman >=20 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"