[Python-Dev] cProfile and threads

[Antoine Pitrou]

Ok, I've looked at the patch and it's actually stackless-agnostic.

Regards

Antoine.


On Tue, 17 Aug 2010 12:31:30 +0200
Antoine Pitrou <solipsis at pitrou.net> wrote:
> On Tue, 17 Aug 2010 09:22:15 +0000
> Kristján Valur Jónsson <kristjan at ccpgames.com> wrote:
> > Hello there.
> > I'd like to draw your attention to two feature requests / patches that I've subbmitted:
> > http://bugs.python.org/issue9609
> > http://bugs.python.org/issue9622
> > 
> > These patches are the result of work that we have done in profiling Stackless Python server applications at runtime, but they apply just as well to C Python.
> > The first patch makes _lsprof, the engine behind cProfile, multi-stack aware.  This allows the same cProfiler.Profile() instance to be active on multiple python threads and still meaningful information is gathered.
> 
> Does that mean you're proposing code for inclusion in CPython that can
> only be tested with Stackless?
> Can't Stackless use its own patches instead?
> 
> > The second patch allows to set the trace/profile function in python globally, so that all threads are affected.  This is essential if you want to take a profililng snapshot of a running application.
> 
> I've often heard that cProfile didn't give correct profiling
> information with multiple threads. Is it true?
> 
> Thanks
> 
> Antoine.