def _test_mem_leakage_much_adding_some_removing(self):
# measure one and throw it away, in order to reach a "steady state" in terms of initialization of memory state.
memutil.measure_mem_leakage(self._mem_test_much_adding_some_removing, SAMPLES, iterspersample=2**0)
slope = memutil.measure_mem_leakage(self._mem_test_much_adding_some_removing, SAMPLES, iterspersample=2**0)
self.assertTrue(slope <= MIN_SLOPE,
"%s leaks memory at a rate of approximately %s system bytes per invocation" % (
self._mem_test_much_adding_some_removing, "%0.3f" % slope,))
def _help_test_no_byte_leakage(self, f):
# measure one and throw it away, in order to reach a "steady state" in terms of initialization of memory state.
memutil.measure_mem_leakage(f, 2**3, iterspersample=2**3)
slope = memutil.measure_mem_leakage(f, 2**3, iterspersample=2**3)
# print "slope: ", slope
MIN_SLOPE = 256.0 # If it leaks less than 256.0 bytes per iteration, then it's probably just some kind of noise from the interpreter or something...
# MIN_SLOPE is high because samples is low, which is because doing statistically useful numbers of samples take too long.
# For a *good* test, turn samples up as high as you can stand (maybe 2**8 for both invocations of measure_mem_leakage()) and set MIN_SLOPE to about 1.0.
# For a *really* good test, add a variance measure to memutil.measure_mem_leakage(), and only consider it to be leaking if the slope is > 1.0 *and* is a "pretty good" fit for the data.
# print "%s leaks memory at a rate of approximately %s system bytes per invocation" % (f, "%0.3f" % slope,)
if slope > MIN_SLOPE:
raise "%s leaks memory at a rate of approximately %s system bytes per invocation" % (f, "%0.3f" % slope,)
def _test_mem_leakage(self):
# measure one and throw it away, in order to reach a "steady state" in terms of initialization of memory state.
memutil.measure_mem_leakage(self.test_em,
max(2**3, SAMPLES / 2**3),
iterspersample=2**0)
slope = memutil.measure_mem_leakage(self.test_em,
max(2**3, SAMPLES / 2**3),
iterspersample=2**0)
self.failUnless(
slope <= MIN_SLOPE,
"%s leaks memory at a rate of approximately %s system bytes per invocation"
% (
self.test_em,
"%0.3f" % slope,
))
def _test_mem_leakage_much_adding_some_removing(self):
# measure one and throw it away, in order to reach a "steady state" in terms of initialization of memory state.
memutil.measure_mem_leakage(self._mem_test_much_adding_some_removing, SAMPLES, iterspersample=2**0)
slope = memutil.measure_mem_leakage(self._mem_test_much_adding_some_removing, SAMPLES, iterspersample=2**0)
self.failUnless(slope <= MIN_SLOPE, "%s leaks memory at a rate of approximately %s system bytes per invocation" % (self._mem_test_much_adding_some_removing, "%0.3f" % slope,))
