From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Mon, 9 Nov 2009 21:37:05 -0500 To: 9fans@9fans.net Message-ID: <8dc3b4a146dde183a3896542f92e9507@coraid.com> In-Reply-To: <13426df10911091646o305d2ab2g664aa719e5b9a0e9@mail.gmail.com> References: <55c52a87f0b8c0ac12a81a150f110b2b@brasstown.quanstro.net> <20091101184418.GM19125@gradx.cs.jhu.edu> <1257590719.28012.1344036163@webmail.messagingengine.com> <20091110003356.GW19125@gradx.cs.jhu.edu> <13426df10911091646o305d2ab2g664aa719e5b9a0e9@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Subject: Re: [9fans] dtrace for plan 9 Topicbox-Message-UUID: 98529808-ead5-11e9-9d60-3106f5b1d025 > > I keep hearing this brought up, but (while I am not an expert) AFAICT, the > > runtime for each D hook should be strictly bounded by the number of > > instructions lobbed in, since D does not (without root override, perhaps?) > > support backwards jumps.  Am I mistaken in my understanding of DTrace? > > You are right. I don't think runtime is unbounded. At the same time, > I'm still trying to locate example scripts to get an idea of how > complex it is. I'm talking to people at sun to get a handle on the > question. before we go all crazy, has anyone else tried ron's great tracing? - erik