From owner-freebsd-current@FreeBSD.ORG Tue Apr 16 20:06:03 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 9357E92D; Tue, 16 Apr 2013 20:06:03 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: from mail-ia0-x229.google.com (mail-ia0-x229.google.com [IPv6:2607:f8b0:4001:c02::229]) by mx1.freebsd.org (Postfix) with ESMTP id 511AA147F; Tue, 16 Apr 2013 20:06:03 +0000 (UTC) Received: by mail-ia0-f169.google.com with SMTP id h23so780040iae.14 for ; Tue, 16 Apr 2013 13:06:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:date:from:to:cc:subject:message-id:references :mime-version:content-type:content-disposition:in-reply-to :user-agent; bh=qyG5TvFSkCAtHRybUaWDjsVjw54BsbNz0OgqoEztwx8=; b=N5wFGQiNG7nAzzfypeRz2OTg0IhcjJ7Y7jk5RZ3rZoHPGBnrW5m0HC7vx0m5Aq+7MQ 1J4KgImIrqyfLkHSknBh9PlioepGTIyA936UkhpLl7vziabbihBYrZP0mRusAxEZGtmM ou+2dRclHHlgKnSWASsbG+a+CvZJ72ImSFF32uTKWcZszOol5o18ETQIuQKYn7xCmMlt pU41vAaRXuUDTb0n31BjdW5eCA39PQF/bFifmlhWBgsDCNTDQR8zUtQ6p+MXDVgZRnpk vVkE7aMv42uJBfQrPZI44OtUoMJMhH+5iKxoP3lUatp7O2AwUpBBxubJqb25EP6w2kXA VDsw== X-Received: by 10.50.127.137 with SMTP id ng9mr2301055igb.32.1366142762891; Tue, 16 Apr 2013 13:06:02 -0700 (PDT) Received: from gloom.sandvine.com ([64.7.137.182]) by mx.google.com with ESMTPS id y5sm3367362igg.7.2013.04.16.13.06.01 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 16 Apr 2013 13:06:02 -0700 (PDT) Date: Tue, 16 Apr 2013 16:05:47 -0400 From: Mark Johnston To: Ryan Stone Subject: Re: DTrace gone quiet? Message-ID: <20130416200547.GA17097@gloom.sandvine.com> References: <516DAD14.9020307@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Cc: FreeBSD Current , Navdeep Parhar 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: Tue, 16 Apr 2013 20:06:03 -0000 On Tue, Apr 16, 2013 at 04:03:06PM -0400, Ryan Stone wrote: > On Tue, Apr 16, 2013 at 3:57 PM, Navdeep Parhar wrote: > > > I just upgraded my kernel and userspace to head (r249552) and I notice > > that DTrace doesn't output anything until I hit ctrl-c. All previous > > "hits" on the probe appear lost. For example: > > > > # dtrace -n 'fbt::ether_output:entry' > > dtrace: description 'fbt::ether_output:entry' matched 1 probe > > > > (No output here. I waited a long time before the ctrl-c and I know the > > system is actively transmitting and receiving Ethernet traffic). > > > > ^C > > CPU ID FUNCTION:NAME > > 9 29354 ether_output:entry > > 8 29354 ether_output:entry > > 8 29354 ether_output:entry > > 8 29354 ether_output:entry > > > > > > Can anyone confirm or contradict this on a recent HEAD (around r249552 > > in my case)? > > > > Regards, > > Navdeep > > _______________________________________________ > > 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" > > > > Hm, if you run with "-x bufpolicy=switch" does it work? It sounds as > through the ring buffer policy is being set by default for you. I'm not > sure how that could happen. I'm seeing it too as of r249508. Adding those arguments doesn't seem to have any effect.