It seems like the 15 min timeout for the overall test_largefile is too short for the very slow AMD64 FreeBSD 10-STABLE Non-Debug 3.x buildbot.

The test creates two files of 2.5 GB on the disk.

One solution is to skip the test on this buildbot worker. For example, using a test resource like "largefile","cpu" resource, or another one. Maybe only skip TestSocketSendfile.test_it(), or even skip for the whole file. Currently, the whole file requires the "largefile" resource, but only on Windows and macOS.

Right now, the buildbot worker runs the test suite using:

   ./python  ./Tools/scripts/run_tests.py -j 1 -u all -W --slowest --fail-env-changed --timeout=900 -j2 -j4 

So all resources are enabled.

--

https://buildbot.python.org/all/#/builders/167/builds/1695

test_it (test.test_largefile.TestCopyfile) ... ok
Timeout (0:15:00)!
Thread 0x0000000806c95400 (most recent call first):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/test_largefile.py", line 193 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/threading.py", line 882 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/threading.py", line 944 in _bootstrap_inner
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/threading.py", line 902 in _bootstrap

Thread 0x0000000801c06400 (most recent call first):
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/socket.py", line 386 in _sendfile_use_sendfile
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/socket.py", line 483 in sendfile
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/test_largefile.py", line 207 in test_it
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/case.py", line 616 in _callTestMethod
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/case.py", line 659 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/case.py", line 719 in __call__
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/suite.py", line 122 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/suite.py", line 84 in __call__
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/suite.py", line 122 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/suite.py", line 84 in __call__
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/suite.py", line 122 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/suite.py", line 84 in __call__
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/unittest/runner.py", line 176 in run
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/support/__init__.py", line 2032 in _run_suite
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/support/__init__.py", line 2128 in run_unittest
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/runtest.py", line 209 in _test_module
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/runtest.py", line 234 in _runtest_inner2
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/runtest.py", line 270 in _runtest_inner
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/runtest.py", line 153 in _runtest
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/runtest.py", line 193 in runtest
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/main.py", line 318 in rerun_failed_tests
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/main.py", line 691 in _main
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/main.py", line 634 in main
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/libregrtest/main.py", line 712 in main
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/test/__main__.py", line 2 in <module>
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/runpy.py", line 85 in _run_code
  File "/usr/home/buildbot/python/3.x.koobs-freebsd10.nondebug/build/Lib/runpy.py", line 192 in _run_module_as_main
test_it (test.test_largefile.TestSocketSendfile) ... *** Error code 1