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Date: Thu, 05 Mar 2009 17:47:28 -0500 From: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> To: Linus Torvalds <torvalds@...ux-foundation.org>, Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Steven Rostedt <rostedt@...dmis.org>, ltt-dev@...ts.casi.polymtl.ca, Peter Zijlstra <peterz@...radead.org>, Frederic Weisbecker <fweisbec@...il.com>, Arjan van de Ven <arjan@...radead.org>, Pekka Paalanen <pq@....fi>, Arnaldo Carvalho de Melo <acme@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Martin Bligh <mbligh@...gle.com>, "Frank Ch. Eigler" <fche@...hat.com>, Tom Zanussi <tzanussi@...il.com>, Masami Hiramatsu <mhiramat@...hat.com>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Jason Baron <jbaron@...hat.com>, Christoph Hellwig <hch@...radead.org>, Jiaying Zhang <jiayingz@...gle.com>, Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>, mrubin@...gle.com, md@...gle.com Subject: [RFC patch 00/41] LTTng 0.105 core for Linux 2.6.27-rc9 Hi, I spent the last 4-5 months working with the Fujitsu team at implementing the tracer elements identified as goals at Kernel Summit 2008 and at the following Plumber Conference. My idea was to incremententally adapt the LTTng tracer, currently used in the industry and well tested, to those requirements. I spent the last days rearranging/folding/inspecting the LTTng patchset to prepare it for an LKML post. The version 0.105 in the LTTng git tree corresponds to the patchset I am posting here. The said patchset will only include the core features of LTTng, excluding the timestamping infrastructure (trace clock) and excluding the instrumentation. The corresponding git tree contains also the trace clock patches and the lttng instrumentation. The trace clock is required to use the tracer, but it can be used without the instrumentation : there is already a kprobes and userspace event support included in this patchset. This tracer exports binary data through buffers using splice(). The resulting binary files can be parsed from userspace because the format string metadata is exported in the files. The event set can be enhanced by adding tracepoints to the kernel code and by creating probe modules, which connects callbacks to the tracepoints and contain the format string metainformation. Those callbacks are responsible for writing the data in the trace buffers. This separation between the trace buffer format string and the tracepoints is done on purpose so the core kernel instrumentation (tracepoints) is not exported to userspace, which will make maintainance much easier. The tree including the trace clock patches is available at : git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git branch : 2.6.29-rc7-lttng-0.105 Project website : http://www.lttng.org/ Information about how to install and use the tracer is available at : http://ltt.polymtl.ca/svn/trunk/lttv/LTTngManual.html The size of the LTTng core patchset is 41 patches. The diffstat details as follow : include/linux/ltt-core.h | 35 include/linux/ltt-relay.h | 161 + include/linux/ltt-tracer.h | 43 include/linux/marker.h | 121 kernel/marker.c | 353 ++ kernel/module.c | 31 linux-2.6-lttng/Documentation/markers.txt | 17 linux-2.6-lttng/MAINTAINERS | 7 linux-2.6-lttng/Makefile | 2 linux-2.6-lttng/arch/powerpc/kernel/traps.c | 5 linux-2.6-lttng/arch/powerpc/platforms/cell/spufs/spufs.h | 6 linux-2.6-lttng/arch/sparc/Makefile | 2 linux-2.6-lttng/arch/x86/kernel/dumpstack.c | 5 linux-2.6-lttng/arch/x86/mm/fault.c | 1 linux-2.6-lttng/fs/ext4/fsync.c | 8 linux-2.6-lttng/fs/ext4/ialloc.c | 17 linux-2.6-lttng/fs/ext4/inode.c | 79 linux-2.6-lttng/fs/ext4/mballoc.c | 71 linux-2.6-lttng/fs/ext4/mballoc.h | 2 linux-2.6-lttng/fs/ext4/super.c | 6 linux-2.6-lttng/fs/jbd2/checkpoint.c | 7 linux-2.6-lttng/fs/jbd2/commit.c | 12 linux-2.6-lttng/fs/pipe.c | 5 linux-2.6-lttng/fs/select.c | 41 linux-2.6-lttng/fs/seq_file.c | 45 linux-2.6-lttng/fs/splice.c | 1 linux-2.6-lttng/include/linux/immediate.h | 94 linux-2.6-lttng/include/linux/kvm_host.h | 12 linux-2.6-lttng/include/linux/ltt-channels.h | 94 linux-2.6-lttng/include/linux/ltt-core.h | 47 linux-2.6-lttng/include/linux/ltt-relay.h | 186 + linux-2.6-lttng/include/linux/ltt-tracer.h | 731 ++++++ linux-2.6-lttng/include/linux/ltt-type-serializer.h | 107 linux-2.6-lttng/include/linux/marker.h | 16 linux-2.6-lttng/include/linux/module.h | 6 linux-2.6-lttng/include/linux/poll.h | 2 linux-2.6-lttng/include/linux/seq_file.h | 20 linux-2.6-lttng/include/trace/ext4.h | 129 + linux-2.6-lttng/include/trace/jbd2.h | 19 linux-2.6-lttng/init/Kconfig | 2 linux-2.6-lttng/kernel/kallsyms.c | 1 linux-2.6-lttng/kernel/marker.c | 12 linux-2.6-lttng/kernel/module.c | 32 linux-2.6-lttng/ltt/Kconfig | 130 + linux-2.6-lttng/ltt/Makefile | 15 linux-2.6-lttng/ltt/ltt-channels.c | 338 ++ linux-2.6-lttng/ltt/ltt-core.c | 101 linux-2.6-lttng/ltt/ltt-filter.c | 66 linux-2.6-lttng/ltt/ltt-kprobes.c | 479 +++ linux-2.6-lttng/ltt/ltt-marker-control.c | 265 ++ linux-2.6-lttng/ltt/ltt-relay-alloc.c | 715 +++++ linux-2.6-lttng/ltt/ltt-relay-locked.c | 1704 ++++++++++++++ linux-2.6-lttng/ltt/ltt-serialize.c | 685 +++++ linux-2.6-lttng/ltt/ltt-trace-control.c | 1061 ++++++++ linux-2.6-lttng/ltt/ltt-tracer.c | 1210 +++++++++ linux-2.6-lttng/ltt/ltt-type-serializer.c | 96 linux-2.6-lttng/ltt/ltt-userspace-event.c | 131 + linux-2.6-lttng/samples/markers/Makefile | 2 linux-2.6-lttng/samples/markers/marker-example.c | 4 linux-2.6-lttng/samples/markers/probe-example.c | 10 linux-2.6-lttng/samples/markers/test-multi.c | 120 linux-2.6-lttng/virt/kvm/kvm_trace.c | 12 ltt/Kconfig | 24 ltt/Makefile | 2 ltt/ltt-relay-alloc.c | 80 65 files changed, 9445 insertions(+), 398 deletions(-) Comments are welcome. Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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