test_isolate_from_socket_default_timeout fails on SPARC

[mgorny]

test_isolate_from_socket_default_timeout fails on SPARC due to timeout.

$ nosetests tests/tpool_test.py 
.............................Program /home/mgorny/eventlet/tests/isolated/tpool_isolate_socket_default_timeout.py output:
---

---
F.
======================================================================
FAIL: tests.tpool_test.test_isolate_from_socket_default_timeout
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/mgorny/eventlet/tests/__init__.py", line 355, in run_python
    output, _ = p.communicate(timeout=timeout)
  File "/usr/lib/python3.7/subprocess.py", line 964, in communicate
    stdout, stderr = self._communicate(input, endtime, timeout)
  File "/usr/lib/python3.7/subprocess.py", line 1716, in _communicate
    self._check_timeout(endtime, orig_timeout, stdout, stderr)
  File "/usr/lib/python3.7/subprocess.py", line 1011, in _check_timeout
    stderr=b''.join(stderr_seq) if stderr_seq else None)
subprocess.TimeoutExpired: Command '['/usr/bin/python3.7', '/home/mgorny/eventlet/tests/isolated/tpool_isolate_socket_default_timeout.py']' timed out after 1 seconds

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/mgorny/eventlet/tests/tpool_test.py", line 369, in test_isolate_from_socket_default_timeout
    tests.run_isolated('tpool_isolate_socket_default_timeout.py', timeout=1)
  File "/home/mgorny/eventlet/tests/__init__.py", line 381, in run_isolated
    run_python(prefix + path, **kwargs)
  File "/home/mgorny/eventlet/tests/__init__.py", line 361, in run_python
    assert False, 'timed out'
AssertionError: timed out

----------------------------------------------------------------------
Ran 31 tests in 6.873s

FAILED (failures=1)

It seems that the default value of 1 s is probably too slow for non-x86 hardware.

$ time python /home/mgorny/eventlet/tests/isolated/tpool_isolate_socket_default_timeout.py
pass

real	0m1.894s
user	0m1.590s
sys	0m0.110s

After adding timing prints around imports, you can see that it takes ~1.6s to load the Python modules:

$ python /home/mgorny/eventlet/tests/isolated/tpool_isolate_socket_default_timeout.py
2020-05-29 06:40:08.231281
2020-05-29 06:40:09.808935

eventlet git master (336773d)
Python 3.7.7

Linux catbus-mgorny-sparc 5.6.1-gentoo #1 SMP Wed Apr 1 19:36:39 PDT 2020 sparc64 sun4v UltraSparc T5 (Niagara5) GNU/Linux

using system-built packages since these installed by pip just crash (does it even support non-x86?)