utils: Add workaround for multiprocessing bug
PATCH 1/1 utils: Add workaround for multiprocessing bug
Our usage of multitprocessing is problematic. In particular, there is a bug in python 2.7 multiprocessing where signals are not handled until command completion instead of immediately.
This adds a workaround into our wrapper function to deal with the issue.
Signed-off-by Richard Purdie <[email protected]>
bitbake/lib/bb/utils.py +12 -0
@@ -883,5 +883,17 @@ def process_profilelog(fn): # Was present to work around multiprocessing pool bugs in python < 2.7.3 # def multiprocessingpool(*args, **kwargs): + + import multiprocessing.pool + #import multiprocessing.util + #multiprocessing.util.log_to_stderr(10) + # Deal with a multiprocessing bug where signals to the processes would be delayed until the work + # completes. Putting in a timeout means the signals (like SIGINT/SIGTERM) get processed. + def wrapper(func): + def wrap(self, timeout=None): + return func(self, timeout=timeout if timeout is not None else 1e100) + return wrap + multiprocessing.pool.IMapIterator.next = wrapper(multiprocessing.pool.IMapIterator.next) + return multiprocessing.Pool(*args, **kwargs)