https://github.com/python/cpython/commit/074a365c5b377b920ac345b777f14d0150ad3244 commit: 074a365c5b377b920ac345b777f14d0150ad3244 branch: 3.15 author: Miss Islington (bot) <[email protected]> committer: serhiy-storchaka <[email protected]> date: 2026-07-22T08:49:42Z summary:
[3.15] gh-154366: Fix test_asyncio.test_sendfile timing out on DragonFly BSD (GH-154367) (GH-154371) A 4 KiB receive buffer makes DragonFly defer every window update to the delayed ACK timer, so each buffer worth of data costs 100 ms. Use a larger socket buffer there; it is still small enough to pause the protocol long before all data is sent. (cherry picked from commit a6e1b836ec5055cbc8be477ca0c2df0cc12b8cb5) Co-authored-by: Serhiy Storchaka <[email protected]> Co-authored-by: Claude Opus 4.8 <[email protected]> files: M Lib/test/test_asyncio/test_sendfile.py diff --git a/Lib/test/test_asyncio/test_sendfile.py b/Lib/test/test_asyncio/test_sendfile.py index 7afd7de3bb936e6..bdc3aa604a158f3 100644 --- a/Lib/test/test_asyncio/test_sendfile.py +++ b/Lib/test/test_asyncio/test_sendfile.py @@ -98,7 +98,12 @@ class SendfileBase: # 64 KiB page configuration. DATA = b"x" * (1024 * 17 * 64 + 1) # Reduce socket buffer size to test on relative small data sets. - BUF_SIZE = 4 * 1024 # 4 KiB + if sys.platform.startswith('dragonfly'): + # A smaller buffer makes every window update wait 100 ms for the + # delayed ACK timer. + BUF_SIZE = 32 * 1024 # 32 KiB + else: + BUF_SIZE = 4 * 1024 # 4 KiB def create_event_loop(self): raise NotImplementedError _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
