From owner-freebsd-current@FreeBSD.ORG Wed Apr 17 02:28:16 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 3AA75C70 for ; Wed, 17 Apr 2013 02:28:16 +0000 (UTC) (envelope-from pfg@FreeBSD.org) Received: from nm16-vm0.bullet.mail.bf1.yahoo.com (nm16-vm0.bullet.mail.bf1.yahoo.com [98.139.212.253]) by mx1.freebsd.org (Postfix) with SMTP id C2C6B37D for ; Wed, 17 Apr 2013 02:28:15 +0000 (UTC) Received: from [98.139.212.146] by nm16.bullet.mail.bf1.yahoo.com with NNFMP; 17 Apr 2013 02:28:09 -0000 Received: from [98.139.213.13] by tm3.bullet.mail.bf1.yahoo.com with NNFMP; 17 Apr 2013 02:28:09 -0000 Received: from [127.0.0.1] by smtp113.mail.bf1.yahoo.com with NNFMP; 17 Apr 2013 02:28:09 -0000 X-Yahoo-Newman-Id: 311096.54644.bm@smtp113.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: wRuYFW8VM1nVDbLvYFU0Jn.MPZ7V_CxqTokBPp6NCIXKR21 IUhvGyIufVNxX2novMdnq6E4Gcg8UcDeoUkD6PGgyccVBxmK3Fb54l.A_urg ik_uAzrJNgt67wa7hit5f8UGxCbJWhUAwWUGN0O5Svf7qP23puDQOSkqNMbt BvCd7P9fm3kksQS2ffoKk2EOLsYEPxttiwuRstGN8AKK3CEmuM5UpSHzuaEu AREJCwRGqjkQ5aGIxvri5m2M7sokV9pllLR_CdvjklsLNWtXRrQyRu11IV56 DJs3LkFrAWJY4xaanCco5QqHz3cFHc4iICFhkm_KFxhiZeJ6fcHIzbN5XGyw JzdIUJl2M2pByt_GosF2JY55JqYRRDqHa58Sqp4XPIFM2FW7l0SCPfV7GkRI hELSy_DqCjGhMAneU3XJIr36AotYN6SHpnoiV4FZXw68syfv9_szieT3ISPb MpVJkoPRkeayv X-Yahoo-SMTP: xcjD0guswBAZaPPIbxpWwLcp9Unf X-Rocket-Received: from [192.168.0.102] (pfg@190.157.126.109 with plain) by smtp113.mail.bf1.yahoo.com with SMTP; 16 Apr 2013 19:28:09 -0700 PDT Message-ID: <516E08B7.7030807@FreeBSD.org> Date: Tue, 16 Apr 2013 21:28:07 -0500 From: Pedro Giffuni User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:17.0) Gecko/20130324 Thunderbird/17.0.4 MIME-Version: 1.0 To: Mark Johnston Subject: Re: DTrace gone quiet? References: <516DAD14.9020307@FreeBSD.org> <20130416205403.GA1409@gloom.sandvine.com> In-Reply-To: <20130416205403.GA1409@gloom.sandvine.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: Wed, 17 Apr 2013 02:28:16 -0000 On 04/16/13 15:54, Mark Johnston wrote: > On Tue, Apr 16, 2013 at 12:57:08PM -0700, 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)? > Reverting r249367 and rebuilding libdtrace+the kernel fixes the problem > for me. > > -Mark Thanks for pointing culprit ! Unfortunately upstream merged many changes in the same commit so it's difficult to separate the specific change that is causing this. I reverted all the change in r249573. Regards, Pedro.