diff options
| -rw-r--r-- | Lib/test/support/__init__.py | 16 | ||||
| -rw-r--r-- | Lib/test/test_functools.py | 2 | ||||
| -rw-r--r-- | Misc/NEWS | 6 |
3 files changed, 23 insertions, 1 deletions
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py index 1e27777..fa344ec 100644 --- a/Lib/test/support/__init__.py +++ b/Lib/test/support/__init__.py @@ -93,6 +93,7 @@ __all__ = [ "check__all__", "requires_android_level", "requires_multiprocessing_queue", # sys "is_jython", "is_android", "check_impl_detail", "unix_shell", + "setswitchinterval", # network "HOST", "IPV6_ENABLED", "find_unused_port", "bind_port", "open_urlresource", # processes @@ -2547,3 +2548,18 @@ def missing_compiler_executable(cmd_names=[]): continue if spawn.find_executable(cmd[0]) is None: return cmd[0] + + +_is_android_emulator = None +def setswitchinterval(interval): + # Setting a very low gil interval on the Android emulator causes python + # to hang (issue #26939). + minimum_interval = 1e-5 + if is_android and interval < minimum_interval: + global _is_android_emulator + if _is_android_emulator is None: + _is_android_emulator = (subprocess.check_output( + ['getprop', 'ro.kernel.qemu']).strip() == b'1') + if _is_android_emulator: + interval = minimum_interval + return sys.setswitchinterval(interval) diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py index 75427df..ba2a52f 100644 --- a/Lib/test/test_functools.py +++ b/Lib/test/test_functools.py @@ -1322,7 +1322,7 @@ class TestLRU: f.cache_clear() orig_si = sys.getswitchinterval() - sys.setswitchinterval(1e-6) + support.setswitchinterval(1e-6) try: # create n threads in order to fill cache threads = [threading.Thread(target=full, args=[k]) @@ -22,6 +22,12 @@ Library - Issue #28847: dbm.dumb now supports reading read-only files and no longer writes the index file when it is not changed. +Tests +----- + +- Issue #26939: Add the support.setswitchinterval() function to fix + test_functools hanging on the Android armv7 qemu emulator. + What's New in Python 3.6.0 release candidate 1 ============================================== |