Fosdem talk – Full System Observability with SystemTap
Posted on January 3, 2010, 22:13.
Really looking forward to Fosdem next month. This year I will be giving a talk What is my system doing – Full System Observability with SystemTap during one of the main tracks. There will be some demos of the new systemtap java and python tracing support that I blogged about earlier.
Great that SystemTap now has java + python trace integration. If you have somewhere you track RFEs, then I’d love to see SystemTap integration for GLib/GTK. Having a zero-overhead way to do tracing of reference counts on GObjects would be invaluable for debugging GTK apps.
Hi Daniel,
Alexander Larsson is working on that, but for assembler atomic-increment instruction tracing he found the overhead still too large to his liking. He filed a bug report with assembler output that we’ll have to go over to get rid of the extra register spill he found: http://sourceware.org/bugzilla/show_bug.cgi?id=11124 (for compiled in static markers – if you don’t put static markers in and just rely on debuginfo and source lines to put probes there is no overhead in the disabled case at all, but then it isn’t as convenient to place probes).
Cheers,
Mark
FYI, https://fedoraproject.org/wiki/FOSDEM_2010.
BR
Frederic ;)
Alex published about some of his tracing glib with systemtap experiments: http://blogs.gnome.org/alexl/2010/01/04/tracing-glib/