From owner-freebsd-current@FreeBSD.ORG Mon Nov 5 06:29:32 2012 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 70382253 for ; Mon, 5 Nov 2012 06:29:32 +0000 (UTC) (envelope-from davide.italiano@gmail.com) Received: from mail-vb0-f54.google.com (mail-vb0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id 1F9388FC08 for ; Mon, 5 Nov 2012 06:29:31 +0000 (UTC) Received: by mail-vb0-f54.google.com with SMTP id l1so7221997vba.13 for ; Sun, 04 Nov 2012 22:29:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=UPyjbEw+h9N77ILrpJwMbzWWpWlFxqfhF7aEuSp3A6Q=; b=xUOeRhJFdyD4PgZw6xFjfQZqjExGsAkUAzapFCgC3LAjjZVrfuN7ydnqb+6/JC1dAG Ckqe2ZhbRUzAWL+Et8S9nw+diUQUzw9rQ8FtYUqFC8aOY+dpb+ODO4QrlMNjESKJXkax NNOf0AOCAuMsDkI7fCjXIzldfZrPeWgmrAK0idj78hf7DkE/SstIuJu7uqUwIBob20+J Xv1Rvuzfwr5zGWyuQhUikF4l4LuQsiqgyoQMEHirVSTAxe9ayvS+bi6FOtk3pAt7O0jm 4C/HPCAqI5ho+ItMjG4h0k7GgUd8LJ8TEE+laG7HxnGI6W7MB9TqrRvm5HqNE8dLQhPk MhSg== MIME-Version: 1.0 Received: by 10.58.133.3 with SMTP id oy3mr8920526veb.15.1352096971308; Sun, 04 Nov 2012 22:29:31 -0800 (PST) Sender: davide.italiano@gmail.com Received: by 10.58.247.132 with HTTP; Sun, 4 Nov 2012 22:29:31 -0800 (PST) In-Reply-To: <509758B8.1000409@rewt.org.uk> References: <509758B8.1000409@rewt.org.uk> Date: Mon, 5 Nov 2012 07:29:31 +0100 X-Google-Sender-Auth: uFTZM0IPOKcZuKDGR8lzmknRjnM Message-ID: Subject: Re: Dynamic Ticks/HZ From: Davide Italiano To: Joe Holden Content-Type: text/plain; charset=ISO-8859-1 Cc: current@freebsd.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 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: Mon, 05 Nov 2012 06:29:32 -0000 On Mon, Nov 5, 2012 at 7:12 AM, Joe Holden wrote: > Hi guys, > > Has some default changed between 9.1-RC2 and HEAD? > > On identical machines, one with 9.1-RC2 and one with HEAD from yesterday > (GENERIC) I see the following in systat -v: > > 9.1: > 65 cpu0:timer > 10 cpu1:timer > > HEAD: > 1127 cpu0:timer > 22 cpu1:timer > > These are Supermicro i3 boxes and as far as I can see they have matching > BIOS config. > > Thanks, > J > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" Which is your refresh rate for systat? I generally measure sampling every one second (i.e. systat -vm 1). Also, are you making your measurements when the system is idle? In order to trace the source(s) of these interrupts you might consider to collect data via KTR. -- Davide