Ted, First, welcome to DTrace: I think you'll enjoy the ride.
Since the hotspot provider is a USDT (User Statically Defined Tracing) provider, the provider name is going to be hotspot1234, 1234 is the PID of the JVM process. The probes don't get created until the JVM is running, and they go away when the JVM exits. And just in case this question comes up, some of probes that tend to fire very often require the -XX:+ExtendedDTraceProbes JVM option to be active. In you haven't seen it, see http://java.sun.com/javase/6/docs/technotes/guides/vm/dtrace.html for what I believe is the official documentation for the hotspot probes. Keep in mind that even though the documentation show the "args" array being used, USDT probes don't support the args array. You have to use the built-in variables, arg0, arg1, etc. Chip > -----Original Message----- > From: dtrace-discuss-boun...@opensolaris.org [mailto:dtrace-discuss- > boun...@opensolaris.org] On Behalf Of Ted Graham > Sent: Monday, December 15, 2008 11:22 AM > To: dtrace-discuss@opensolaris.org > Subject: [dtrace-discuss] No hotspot probes available? > > I'm new to DTrace; been working through the "Solaris Performance and > Tools" book this morning. DTrace is working great, I've learned some > interesting things, and have run a number of the DTrace Toolkit scripts > and written a few tiny ones. > > However, I can't get any of the hotspot probes to work. DTrace reports > no probes that match hotspot. I'm running the OpenSolaris 11/08 > release, using the default java (which is 1.6.10). > > See the following: > > r...@opensolaris:/usr/Emporos# dtrace -l | wc > 56144 279580 4262222 > > r...@opensolaris:/usr/Emporos# dtrace -ln 'hotspot*:::' > ID PROVIDER MODULE FUNCTION > NAME > dtrace: failed to match hotspot*:::: No probe matches description > > r...@opensolaris:/usr/Emporos# java -version > java version "1.6.0_10" > Java(TM) Platform, Standard Edition for Business (build 1.6.0_10-b33) > Java HotSpot(TM) Server VM (build 11.0-b15, mixed mode) > -- > This message posted from opensolaris.org > _______________________________________________ > dtrace-discuss mailing list > dtrace-discuss@opensolaris.org _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
