Hi, I just released a development snapshot of the current LTTng so those interested can start building it in various configurations. The targets of this development phase were as follows:
1) The size of the kernel patchset has been shrinked for Linux distributions by removing all LTTng-specific instrumentation from the tree. 2) The lttng-modules package now implements an ABI based on anonymous file descriptors (inspired from perf) rather than the full-blown VFS tree the previous LTTng versions were implementing. 3) lttng-modules now exports trace data and metadata in the CTF (Common Trace Format). 4) lttng-modules now uses the Generic Ring Buffer Library. The kernel tree snapshot is available as a tarball at: http://lttng.org/files/lttng/patch-2.6.37-lttng-dev-snapshot-20110116.tar.bz2 The kernel patchset contains the following subdirectories: trace-event-merged/ (3 patches, merged in the tracing tree) 5 files changed, 22 insertions(+), 17 deletions(-) trace-event-semicolon-removal/ (29 patches) 37 files changed, 730 insertions(+), 662 deletions(-) trace-event-assign-macros/ (8 patches) 10 files changed, 251 insertions(+), 223 deletions(-) trace-clock/ (19 patches) 60 files changed, 2750 insertions(+), 216 deletions(-) lib-ring-buffer/ (9 patches) 34 files changed, 6635 insertions(+), 71 deletions(-) lttng/ (3 patches) 3 files changed, 11 insertions(+), 1 deletion(-) lib-ring-buffer-improvements/ (7 patches) 12 files changed, 279 insertions(+), 14 deletions(-) The LTTng kernel patchset is needed to build the current lttng-modules git tree (a kernel module package). To fetch it: git clone git://git.lttng.org/lttng-modules.git (.c and .h files: 3170 lines total) I currently have only a rather basic test program to interface with the new ABI (available at http://lttng.org/files/lttng/test-lttng-ioctl.c), but I am planning to work on the new strace-like command line program within the next weeks (note: the location of the debugfs LTTng file will very likely change). The objective is to create one single command-line tool to control both the LTTng kernel tracer and the UST user-space tracer. Thanks, Mathieu -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
