We should figure out how we address this (if needed by this team) on our roadmap.
-- Matt Ingenthron - Web Infrastructure Solutions Architect Sun Microsystems, Inc. - Global Systems Practice http://blogs.sun.com/mingenthron/ email: matt.ingenthron at sun.com Phone: 310-242-6439 ----------Original Message---------- From: Andy Armstrong <a...@hexten.net> Sent: Fri, January 11, 2008 12:47 PM To: dtrace-discuss at opensolaris.org, Perl QA <perl-qa at perl.org>, mod_perl list <modperl at perl.apache.org>, pp Porters <perl5-porters at perl.org> Subject: [dtrace-discuss] DTrace in Perl: What probes should we have? As of patch 32953 dtrace support is in bleadperl (5.11.0). The probes are based on Alan Burlinson's original blog post on the subject: http://blogs.sun.com/alanbur/date/20050909 By guarding the probes with PERL_SUB_*_ENABLED the performance hit is unmeasurable. All the necessary bits already existed in the wild. I just assembled them and made the necessary changes to Perl's Configure script. The patched Perl works with the examples in DTraceToolkit. Currently we have probes on subroutine entry and return. Next I'd like to solicit input about what other probes would be useful. I have Sven Dowideit's patch that adds probes on new__sv, del__sv (creation and deletion of values) and, main__enter, main__exit (interpreter lifecycle) and load__module (require, use etc). Where else might we usefully probe? What would people find useful? -- notes -- I'm crossposting this to what I hope are a few interested lists. If anyone reading this needs a primer on dtrace this video is highly recommended: http://video.google.com/videoplay?docid=-8002801113289007228 It's 90 minutes of your life but it'll be time well spent :) If anyone would like to try bleadperl it is available here: rsync -avz --exclude .svn/ --delete \ rsync://ftp.linux.activestate.com/perl-current/ bleadperl You can configure it like this: ./Configure -de -Dusedevel -Dinc_version_list=none \ -Dprefix=$install -Dldflags=-Dman3ext=3pm \ -Duseithreads -Duseshrplib -Uversiononly \ -Dusedtrace where $install is your preferred install base. Right now ./Configure displays a harmless error about '!' being an unknown command just after the questions. There's a patch in the pipeline to fix that. -- Andy Armstrong, Hexten _______________________________________________ dtrace-discuss mailing list dtrace-discuss at opensolaris.org
