[Python-Dev] Issue #10348: concurrent.futures doesn't work on BSD (original) (raw)

Philip Semanchuk philip at semanchuk.com
Wed Dec 29 20:33:29 CET 2010

On Dec 29, 2010, at 2:14 PM, R. David Murray wrote:

On Wed, 29 Dec 2010 12:58:55 -0500, Jesse Noller <jnoller at gmail.com> wrote:

The concurrent.futures tests should (like the multiprocessing test suite) detect the lack of support and skip the tests on the broken platforms. I'm sort of surprised FreeBSD support is still broken in this way though (echoed by Philip) although it could be an issue on that particular buildbot. If I'm reading the issue correctly, it isn't that it doesn't work, it's that the concurrent.futures tests fail because they create more semaphores than the default FreeBSD install supports. In other words, a user of concurrent.futures really needs to tweak their FreeBSD install to make in fully functional.

I think that's correct. Furthermore, the default 7.2 install doesn't have the necessary kernel modules loaded in order to use POSIX semaphores. See the notes here for FreeBSD: http://semanchuk.com/philip/posix_ipc/#platforms

kldstat on my barely-customized 7.2 installation gives a list of three modules: kernel, acpi.ko and linux.ko (I assume because I asked for Linux executable format compatibility when I installed).

bye Philip

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