[libdispatch-dev] Mountain Lion libdispatch for Linux

Daniel A. Steffen dsteffen at apple.com
Wed Oct 17 00:03:11 PDT 2012

Hi Nick,

awesome, thanks for the patches!

looking at the test failures:

the dispatch_vnode failure means not all vnode notifications were seen that should have been generated in response to the file rename()s perfomed, this is likely fixable by adjusting the dispatch_semaphore_wait timeout in the test, but could also indicate a problem in the kevent library or somewhere below

dispatch_starfish is essentially a stress test for multithreaded malloc, looks like the latency allowed by the test was exceeded in one case, this does not indicate a serious problem (the timing constants in the test would need to be adjusted for Linux for this to pass).

the dispatch_io failures look more serious and likely indicate a problem with the port of io.c, the asynchronous IO does not seem to be performed correctly, but I can't tell anything more specific about the cause from the output, so you'll probably need to do some debugging...


On Oct 16, 2012, at 22:56, Nick Hutchinson <nshutchinson at gmail.com> wrote:

> Hi all,
> I've written some portability fixes to get Mountain Lion's libdispatch up and running on Linux, and my fork is up on Github for anyone who's interested: https://github.com/nickhutchinson/libdispatch. 
> I used Mark Heily's patches[1] that were previously posted on this list as a starting point. Note that I've had no previous experience with Autotools, and so the patches might be a little rough around the edges. Feedback is welcome.
> The test suite builds, and most tests pass. However, the following three tests are failing, and I'd love to know why!
> - dispatch_starfish
> - dispatch_io
> - dispatch_vnode
> The test output is here: https://gist.github.com/3903724
> Cheers,
> Nick
> [1] http://lists.macosforge.org/pipermail/libdispatch-dev/2012-August/000676.html
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