amccarth updated this revision to Diff 36993.
amccarth added a comment.
Using the multiprocessing-pool mode seems more reliable than capping
num_threads. I'm doing it only when the number of threads is high because of
the loss of Ctrl+C support.
http://reviews.llvm.org/D13555
Files:
test/dosep.py
Index: test/dosep.py
===================================================================
--- test/dosep.py
+++ test/dosep.py
@@ -1254,10 +1254,13 @@
# Use the serial runner.
test_runner_name = "serial"
elif os.name == "nt":
- # Currently the multiprocessing test runner with ctrl-c
- # support isn't running correctly on nt. Use the pool
- # support without ctrl-c.
- test_runner_name = "threading-pool"
+ # On Windows, Python uses CRT with a low limit on the number of open
+ # files. If you have a lot of cores, the threading-pool runner will
+ # often fail because it exceeds that limit.
+ if num_threads > 32:
+ test_runner_name = "multiprocessing-pool"
+ else:
+ test_runner_name = "threading-pool"
elif is_darwin_version_lower_than(
distutils.version.StrictVersion("10.10.0")):
# OS X versions before 10.10 appear to have an issue using
Index: test/dosep.py
===================================================================
--- test/dosep.py
+++ test/dosep.py
@@ -1254,10 +1254,13 @@
# Use the serial runner.
test_runner_name = "serial"
elif os.name == "nt":
- # Currently the multiprocessing test runner with ctrl-c
- # support isn't running correctly on nt. Use the pool
- # support without ctrl-c.
- test_runner_name = "threading-pool"
+ # On Windows, Python uses CRT with a low limit on the number of open
+ # files. If you have a lot of cores, the threading-pool runner will
+ # often fail because it exceeds that limit.
+ if num_threads > 32:
+ test_runner_name = "multiprocessing-pool"
+ else:
+ test_runner_name = "threading-pool"
elif is_darwin_version_lower_than(
distutils.version.StrictVersion("10.10.0")):
# OS X versions before 10.10 appear to have an issue using
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