[Pkg-bazaar-maint] Bug#647690: bzr: FTBFS(kfreebsd): NotImplementedError: cannot determine number of cpus

[Jelmer Vernooij]

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On 05/11/11 12:21, Robert Millan wrote:
> 2011/11/5 Christoph Egger <christoph at debian.org>:
>> File
"/build/buildd-bzr_2.4.2-1-kfreebsd-amd64-jZoBIh/bzr-2.4.2/build/lib.gnukfreebsd-8.1-1-amd64-x86_64-2.7/bzrlib/osutils.py",
line 2322, in local_concurrency
>> concurrency = multiprocessing.cpu_count()
>> File "/usr/lib/python2.7/multiprocessing/__init__.py", line 136, in
cpu_count
>> raise NotImplementedError('cannot determine number of cpus')
>> NotImplementedError: cannot determine number of cpus
>
> I don't know how to do this in python, but in case it helps you can
> obtain the number of cpus via { CTL_HW, HW_NCPU } sysctl:
>
> $ sysctl hw.ncpu
> hw.ncpu: 2
We already have a fallback mechanism for older versions of Python that
don't provide the multiprocessing module. I'll make
bzrlib.osutils.local_concurrency() fall back to that if
multiprocessing.cpu_count() raises NotImplementedError.

Arguably this is also a bug in Python, because it should be able to
provide the CPU count on Debian GNU/kFreeBSD.

Thanks for the bug report and useful suggestions.

Cheers,

Jelmer

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