Date: Thu, 12 Jun 2008 13:32:23 -0300 From: "Felipe Neuwald" <felipebgn@gmail.com> To: "Andrew MacIntyre" <andymac@bullseye.apana.org.au> Cc: freebsd-performance@freebsd.org, freebsd-python@freebsd.org Subject: Re: Performance with python and FreeBSD 7.0 amd64 Message-ID: <928b5da90806120932v49113d35if81b12c45c86c662@mail.gmail.com> In-Reply-To: <485107C2.7080202@bullseye.andymac.org> References: <928b5da90806111738h55bbbbb0y3e9731323a1561f4@mail.gmail.com> <485107C2.7080202@bullseye.andymac.org>
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> > Hmm... that's an interesting mix of failures. > > I have seen bus errors when Python runs out of stack space either in the > main thread or child threads (not an unknown issue with Zope). > > gcc 4.x in my limited experience generates sometimes noticeably larger > stack frames than gcc 3.x (which is standard on 6.x), which can provoke > unexpected stack exhaustion. > > You don't mention whether you're using a local build or a binary package. > Nor do you mention the point release (python 2.4.5 is the most recent in > the 2.4 series). I'm using a local build, installed via ports tree (python24-2.4.5_1). > The default thread stack size according to my 6.3 box's ports is 1MB for > Python 2.4.4) which should be adequate for most circumstances. > > The illegal instruction failure suggests something wrong with your > binaries (including those built for Zope). > > The segmentation violations often indicate a problem with reference > counts, frequently attributable to bugs in 3rd party extensions. > > You might want to check that all binaries for Python, Zope & Plone (if it > has any) link against the same libraries. Ok, I'll try to check these. I'm not the python + zope + plone guy, I'm the FreeBSD administrator. I'll have to work with the application team to find the solution for these problem. > If you can snaffle cores, you might want to try and extract backtraces > from gdb (debugging symbols would make this more productive...) Ok, I'll also try to get more information with cores. Thanks, Felipe Neuwald.
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