From owner-freebsd-fs@freebsd.org Fri Feb 19 19:35:24 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6D8B7AAEBDC for ; Fri, 19 Feb 2016 19:35:24 +0000 (UTC) (envelope-from mwlucas@mail.michaelwlucas.com) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 571ED1444 for ; Fri, 19 Feb 2016 19:35:24 +0000 (UTC) (envelope-from mwlucas@mail.michaelwlucas.com) Received: by mailman.ysv.freebsd.org (Postfix) id 5606CAAEBDA; Fri, 19 Feb 2016 19:35:24 +0000 (UTC) Delivered-To: fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 54C03AAEBD8 for ; Fri, 19 Feb 2016 19:35:24 +0000 (UTC) (envelope-from mwlucas@mail.michaelwlucas.com) Received: from mail.michaelwlucas.com (mail.michaelwlucas.com [104.236.197.233]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 109531443 for ; Fri, 19 Feb 2016 19:35:23 +0000 (UTC) (envelope-from mwlucas@mail.michaelwlucas.com) Received: from mail.michaelwlucas.com (localhost [127.0.0.1]) by mail.michaelwlucas.com (8.15.2/8.15.2) with ESMTP id u1JJY6jN047669; Fri, 19 Feb 2016 14:34:07 -0500 (EST) (envelope-from mwlucas@mail.michaelwlucas.com) Received: (from mwlucas@localhost) by mail.michaelwlucas.com (8.15.2/8.15.2/Submit) id u1JJY6cm047668; Fri, 19 Feb 2016 14:34:06 -0500 (EST) (envelope-from mwlucas) Date: Fri, 19 Feb 2016 14:34:05 -0500 From: "Michael W. Lucas" To: Tom Curry Cc: fs@freebsd.org Subject: Re: dtracing ZFS on FreeBSD Message-ID: <20160219193405.GA47628@mail.michaelwlucas.com> References: <20160219180716.GA46881@mail.michaelwlucas.com> <20160219190753.GA47502@mail.michaelwlucas.com> MIME-Version: 1.0 Content-Type: text/plain; charset=unknown-8bit Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-Spam-Status: No, score=0.0 required=5.0 tests=UNPARSEABLE_RELAY, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mail.michaelwlucas.com X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (mail.michaelwlucas.com [127.0.0.1]); Fri, 19 Feb 2016 14:34:08 -0500 (EST) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Feb 2016 19:35:24 -0000 On Fri, Feb 19, 2016 at 02:14:24PM -0500, Tom Curry wrote: > One other thing to try in concert with the larger buffer, > #pragma D option bufpolicy=ring > In theory I would expect it not to drop, but the window of tracing > would be smaller. Still dropping, but thanks. Output is buffered, so I can't say which graphs the drops happened with. (If that's actually what the drop messages tell me, that is...) ==ml -- Michael W. Lucas - mwlucas@michaelwlucas.com, Twitter @mwlauthor http://www.MichaelWLucas.com/, http://blather.MichaelWLucas.com/