[RELEASE] LTTng 2.0 prerelease 1

[RELEASE] LTTng 2.0 prerelease 1

[Mathieu Desnoyers]

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.

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

Re: [RELEASE] LTTng 2.0 prerelease 1

[Mathieu Desnoyers]

* 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