[ltt-dev] LTTng 0.10-pre57 for linux 2.6.26-rc9 (with userspace tracing for x86)

[Mathieu Desnoyers]

Hi,

Here is a new release of LTTng for the 2.6.26-rc9 kernel, which
introduces :

- The tracepoints infrastructure.
- Architecture independent markers converted to tracepoints.
- Re-introduction of userspace tracing, only for x86 for now. Allows to
  do boot-time tracing (such as tracing the init process). Adds 2 system
  calls : sys_marker (marker registration) and sys_trace (tracing per
  se). The type support is currently limited : strings are formatted in
  userspace and sent to the kernel for logging under the event
  "userspace_string". I am doing this simple implementation to get the
  feature in until I have time to think more carefully about namespacing
  issues, typing and 32/64 bits processes in 64 bits architectures.

Please consider this last feature experimental. Review and testing is
welcome. The userspace linker script and library needed to perform
userspace tracing, as well as some sample code and Makefile, are
available in the svn repository at

http://ltt.polymtl.ca/svn/markers-userspace/

Ports of the linker script, kernel-api.h (which should be
per-architecture) and of markers-userspace-x86.patch to other
architectures are welcome.

As always, please follow the compatibility list and the quickstart guide
located at :

http://ltt.polymtl.ca/svn/ltt/branches/poly/doc/developer/lttng-lttv-compatibility.html

http://ltt.polymtl.ca/svn/ltt/branches/poly/QUICKSTART

Mathieu

-- 
Mathieu Desnoyers
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