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Date: Thu, 24 Nov 2011 17:46:48 +0100
From: Jesus Cea <jcea@jcea.es>
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To: dtrace-discuss@opensolaris.org, python-list@python.org, La lista de python en castellano <python-es@python.org>, python-madrid@googlegroups.com, OpenIndiana Developer mailing list <oi-dev@openindiana.org>, Discussion list for OpenIndiana <openindiana-discuss@openindiana.org>
Subject: DTrace probes in Python 2.7 (and next 3.3)
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Hi all.

I have spend some time trying to integrate DTrace probes in official
Python: Currently I have a patch to python 2.7, and my plan in to
integrate officially in 3.3.

The initial probes were based on previous work from OpenSolaris, and
similar, but currently I have quite a few more probes. Current details
in
<http://hg.jcea.es/cpython-2011/file/b1a39702dfd8/Doc/library/dtrace.rst>

The probes are tested under Solaris 10 x86 and x86-64. I would need
somebody to try on Solaris 10 Sparc (32 and 64 bits), Solaris 11,
OpenIndiana, FreeBSD (seems to need a kernel recompilation to enable
user mode tracing, check Google), Mac (I doubt it works as is), etc.,
any other platform running DTrace. What about SystemTap compatibility?

Details: <http://bugs.python.org/issue13405>

How to check: <http://bugs.python.org/issue13405#msg147706>.

The easier way to get the patch is to clone my repository at
<https://hg.jcea.es/cpython-2011/> (with mercurial) and move to the
branch "dtrace-issue13405_2.7". Keep the clone around if you plan to
try future versions of this patch, including the future 3.3 version.

You can manually apply the patch in
<http://bugs.python.org/file23758/a9f4ae43fd85.diff> to python 2.7.2+
sourcecode. The patch is developed against version 3c3009f63700
(2011-11-14). It might not apply cleanly to 2.7.2 sourcecode (not
checked). I will provide a direct patch to 2.7.3 when available. Maybe
to 2.7.2 if there is demand.

This is still work in progress. I will improve support with your
feedback. I am considering probes to monitor GIL and thinking how to
monitor C function calls from Python in an easy and fast way. Feedback
very welcomed.

Please, if you care about this, test it and provide some feedback :).

PS: Better post feedback in the bug tracker that by personal email :-).

- -- 
Jesus Cea Avion                         _/_/      _/_/_/        _/_/_/
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"El amor es poner tu felicidad en la felicidad de otro" - Leibniz
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