On Wed, Oct 22, 2008 at 10:31 AM, <[EMAIL PROTECTED]> wrote: > On Oct 22, 8:11 am, "Jesse Noller" <[EMAIL PROTECTED]> wrote: >> On Tue, Oct 21, 2008 at 6:45 PM, <[EMAIL PROTECTED]> wrote: >> > It seems that the multiprocessing module in 2.6 is broken for *BSD; >> > I've seen issue 3770 regarding this. I'm curious if there are more >> > details on this issue since the posts in 3770 were a bit unclear. For >> > example, one post claimed that the problem was that sem_open isn't >> > implemented in *BSD, but it is available on FreeBSD 7 (I checked). I'd >> > be willing to help get this working if someone could point me in the >> > right direction. >> > -- >> >http://mail.python.org/mailman/listinfo/python-list >> >> The BSD issue was raised late in the cycle for 2.6. The problem is >> that FBSD's support is "very experimental" as Phillip points out - and >> OpenBSD doesn't even have them. >> >> Due to the lateness of the issue and a finite amount of time I have to >> work on things, I chose to disable support for this on the various >> *BSDs until I can cook up a stable patch or have one provided by >> someone more familiar with the inner workings of Free-BSD. OpenBSD >> support is a non-starter. >> >> Ideally, I would like to get this fixed and put on the 2.6 maint >> branch ASAP, but I haven't had a chance to circle back to it. >> >> Also note Nick's comment in that bug: "Unfortunately, our OpenBSD and >> FreeBSD buildbots are so unreliable that they don't get much attention >> when they go red" >> >> Stable reliable buildbots and a few more volunteers more familiar with >> BSDs might be a great and welcome addition to python-dev. >> >> As for getting this working - I would love a patch. You are going to >> want to start with python-trunk and look in setup.py. You are going to >> want to adjust the flags the package uses: >> >> elif platform in ('freebsd5', 'freebsd6', 'freebsd7', 'freebsd8'): >> # FreeBSD's P1003.1b semaphore support is very experimental >> # and has many known problems. (as of June 2008) >> macros = dict( # FreeBSD >> HAVE_SEM_OPEN=0, >> HAVE_SEM_TIMEDWAIT=0, >> HAVE_FD_TRANSFER=1, >> ) >> libraries = [] >> >> You will also need to look at: Lib/multiprocessing/synchronize.py to >> disable the import error - Modules/_multiprocessing/multiprocessing.h >> will need to be updated for the proper ifdefs for the bsd(s) as well. >> Finally, the core of the semaphore usage is in >> Modules/_multiprocessing/semaphore.c >> >> I apologize we/I could not get this in for 2.6 >> >> -jesse > > This is exactly the sort of response I was hoping for. Thanks for the > additional background on the problem. I'll take a look at the code and > see if I can figure out a patch. I'll also read up on the buildbot > issue ( I think I saw a link about that)...I might have a stable co- > located FreeBSD box that could be used. > -Alan > -- > http://mail.python.org/mailman/listinfo/python-list >
I know I really appreciate the additional set of eyes on this, so thanks Alan! -- http://mail.python.org/mailman/listinfo/python-list
