[pypy-issue] [issue1258] Interrupted system call from os.urandom

[Zooko]

New submission from Zooko <zooko at zooko.com>:

This script has never done this under CPython, but just now I got this failure:

MAIN zompu:~/playground/stringchain$ time
PYTHONPATH=/usr/local/site-packages/pyutil-1.9.3_2-py2.7.egg/:/usr/local/site-packages/statprof-0.1.2-py2.7.egg
pypy -OOu -c 'from stringchain.bench import bench; bench.slow_bench(profile=True)'
N is the total number of bytes produced and consumed; results are in nanoseconds
per byte (scientific notation)

impl:  StringChain
task:  accumulate_then_one_gulp
N:  100000000Traceback (most recent call last):
  File "app_main.py", line 51, in run_toplevel
  File "app_main.py", line 575, in run_it
  File "<string>", line 1, in <module>
  File "stringchain/bench/bench.py", line 469, in slow_bench
    benchutil.rep_bench(task, BSIZE, initfunc=initfunc,
UNITS_PER_SECOND=UNITS_PER_SECOND)#, profile=profile,
profresultsfileobj=profresultsfileobj)
  File
"/usr/local/stow/pypy-1.9/site-packages/pyutil-1.9.3_2-py2.7.egg/pyutil/benchutil.py",
line 142, in rep_bench
    initfunc(n)
  File "stringchain/bench/bench.py", line 337, in init
    self.l.append(randstr(nextchunksize))
  File
"/usr/local/stow/pypy-1.9/site-packages/pyutil-1.9.3_2-py2.7.egg/pyutil/randutil.py",
line 84, in insecurerandstr
    return os.urandom(n)
  File "/usr/local/stow/pypy-1.9/lib-python/2.7/os.py", line 756, in urandom
    bs += read(_urandomfd, n - len(bs))
OSError: [Errno 4] Interrupted system call


real    0m14.677s
user    0m1.703s
sys     0m12.936s
MAIN zompu:~/playground/stringchain$ time
PYTHONPATH=/usr/local/site-packages/pyutil-1.9.3_2-py2.7.egg/:/usr/local/site-packages/statprof-0.1.2-py2.7.egg
pypy -OOu -c 'from stringchain.bench import bench; bench.slow_bench(profile=True)'
N is the total number of bytes produced and consumed; results are in nanoseconds
per byte (scientific notation)

impl:  StringChain
task:  accumulate_then_one_gulp
N:  100000000Traceback (most recent call last):
  File "app_main.py", line 51, in run_toplevel
  File "app_main.py", line 575, in run_it
  File "<string>", line 1, in <module>
  File "stringchain/bench/bench.py", line 469, in slow_bench
    benchutil.rep_bench(task, BSIZE, initfunc=initfunc,
UNITS_PER_SECOND=UNITS_PER_SECOND)#, profile=profile,
profresultsfileobj=profresultsfileobj)
  File
"/usr/local/stow/pypy-1.9/site-packages/pyutil-1.9.3_2-py2.7.egg/pyutil/benchutil.py",
line 142, in rep_bench
    initfunc(n)
  File "stringchain/bench/bench.py", line 337, in init
    self.l.append(randstr(nextchunksize))
  File
"/usr/local/stow/pypy-1.9/site-packages/pyutil-1.9.3_2-py2.7.egg/pyutil/randutil.py",
line 84, in insecurerandstr
    return os.urandom(n)
  File "/usr/local/stow/pypy-1.9/lib-python/2.7/os.py", line 756, in urandom
    bs += read(_urandomfd, n - len(bs))
OSError: [Errno 4] Interrupted system call


real    0m28.911s
user    0m3.436s
sys     0m25.242s

It seems to take a different amount of time to fail each time I run it. I'm
using statprof -- http://pypi.python.org/pypi/statprof/ -- which sets a timer
signal -- which is probably part of the problem.

----------
messages: 4735
nosy: pypy-issue, zooko
priority: bug
status: unread
title: Interrupted system call from os.urandom

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PyPy bug tracker <tracker at bugs.pypy.org>
<https://bugs.pypy.org/issue1258>
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