Messages in this thread | | | Date | Tue, 26 Jul 2011 11:52:37 -0400 | From | Mathieu Desnoyers <> | Subject | Re: [RELEASE] LTTng 2.0 prerelease 1 |
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* Mathieu Desnoyers (mathieu.desnoyers@efficios.com) wrote: > LTTng, the Linux Trace Toolkit Next Generation, is a highly efficient > full system tracing solution toolchain. It is composed of several > components to allow tracing of the kernel, of userspace, trace viewing > and analysis and trace streaming. LTTng is open source software.
FYI, the new bundle: http://lttng.org/bundles/20110726/
contains lttng-modules-2.0-pre2 which fixes perf counters context support: in pre1, using perf counters with multiple contexts, on a setup with cpu hotplug enabled, sometimes caused kernel OOPS on trace session destroy, because reallocation of context array could move these addresses, but cpu hotplug notifier needs a fixed address. This is fixed in lttng-modules-2.0-pre2.
Thanks,
Mathieu
> > New Features: > > - LTTng 2.0 kernel modules build against a vanilla or distribution > kernel, without need for additional patches. > - Produces CTF (Common Trace Format) natively, > (http://www.efficios.com/ctf) > - Tracepoints, Function tracer, CPU Performance Monitoring Unit (PMU) > counters and kprobes support, > - Integrated interface for both kernel and userspace tracing, > - Have the ability to attach "context" information to events in the > trace (e.g. any PMU counter, pid, ppid, tid, comm name, etc). > All the extra information fields to be collected with events are > optional, specified on a per-tracing-session basis (except for > timestamp and event id, which are mandatory). > - Allows non-root users part of the "tracing" group to perform kernel > and userspace tracing. > - Allows multiple tracing sessions to be active concurrently, each with > its own instrumentation set. > > You can get a the current release "bundle" (recommanded set of packages) > at the following URL: > > http://lttng.org/bundles/20110725/ > > Refer to the README files for installation instructions and lttng-tools > doc/quickstart.txt for usage information and examples. > (http://git.lttng.org/?p=lttng-tools.git;a=blob_plain;f=doc/quickstart.txt) > > Please note that the LTTng-UST 2.0 (user-space tracing counterpart of > LTTng 2.0) is still in active development and not released yet. Only > text-dump output of the binary traces is available at this moment > through the Babeltrace tool (LTTV is not supported yet). Tracing from > the "tracing" group currently produces traces owned by "root"; this > known problem will be fixed in the next prerelease. This release has > been tested on vanilla Linux kernels, Debian kernels, Ubuntu kernels, > and Fedora kernels on the version range 2.6.38, 2.6.39 and 3.0 (on x86 > 32/64-bit, and powerpc 32-bit at the moment, build tested on ARM). > > Feedback is welcome! > > Thanks, > > Mathieu > > Project website: http://lttng.org > Download link: http://lttng.org/lttng2.0 > > -- > Mathieu Desnoyers > Operating System Efficiency R&D Consultant > EfficiOS Inc. > http://www.efficios.com
-- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com
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