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python3.2  3.2.2
Public Member Functions | Public Attributes | Static Public Attributes
Lookups.SpecialInstanceAttribute Class Reference
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List of all members.

Public Member Functions

def test
def calibrate
def get_timer
def compatible
def calibrate_test
def run
def stat

Public Attributes

 last_timing
 warp
 times

Static Public Attributes

float version = 2.0
 Instance variables that each test should override.
int operations = 5
int rounds = 100000
int is_a_test = 1
 Internal variables.
tuple last_timing = (0.0, 0.0, 0.0)
int warp = 1
 calibration_runs = CALIBRATION_RUNS
 overhead_times = None
list times = []
 timer = TIMER_PLATFORM_DEFAULT

Detailed Description

Definition at line 370 of file Lookups.py.


Member Function Documentation

Calibrate the test.

    This method should execute everything that is needed to
    setup and run the test - except for the actual operations
    that you intend to measure. pybench uses this method to
    measure the test implementation overhead.

Reimplemented from pybench.Test.

Definition at line 549 of file Lookups.py.

00549 
00550     def calibrate(self):
00551 
00552         class c:
00553             pass
00554         o = c()
00555 
00556         for i in range(self.rounds):
00557             pass

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def pybench.Test.calibrate_test (   self) [inherited]

Definition at line 262 of file pybench.py.

00262 
00263     def calibrate_test(self):
00264 
00265         if self.calibration_runs == 0:
00266             self.overhead_times = [0.0]
00267             return
00268 
00269         calibrate = self.calibrate
00270         timer = self.get_timer()
00271         calibration_loops = range(CALIBRATION_LOOPS)
00272 
00273         # Time the calibration loop overhead
00274         prep_times = []
00275         for i in range(self.calibration_runs):
00276             t = timer()
00277             for i in calibration_loops:
00278                 pass
00279             t = timer() - t
00280             prep_times.append(t / CALIBRATION_LOOPS)
00281         min_prep_time = min(prep_times)
00282         if _debug:
00283             print()
00284             print('Calib. prep time     = %.6fms' % (
00285                 min_prep_time * MILLI_SECONDS))
00286 
00287         # Time the calibration runs (doing CALIBRATION_LOOPS loops of
00288         # .calibrate() method calls each)
00289         for i in range(self.calibration_runs):
00290             t = timer()
00291             for i in calibration_loops:
00292                 calibrate()
00293             t = timer() - t
00294             self.overhead_times.append(t / CALIBRATION_LOOPS
00295                                        - min_prep_time)
00296 
00297         # Check the measured times
00298         min_overhead = min(self.overhead_times)
00299         max_overhead = max(self.overhead_times)
00300         if _debug:
00301             print('Calib. overhead time = %.6fms' % (
00302                 min_overhead * MILLI_SECONDS))
00303         if min_overhead < 0.0:
00304             raise ValueError('calibration setup did not work')
00305         if max_overhead - min_overhead > 0.1:
00306             raise ValueError(
00307                 'overhead calibration timing range too inaccurate: '
00308                 '%r - %r' % (min_overhead, max_overhead))

def pybench.Test.compatible (   self,
  other 
) [inherited]
Return 1/0 depending on whether the test is compatible
    with the other Test instance or not.

Definition at line 250 of file pybench.py.

00250 
00251     def compatible(self, other):
00252 
00253         """ Return 1/0 depending on whether the test is compatible
00254             with the other Test instance or not.
00255 
00256         """
00257         if self.version != other.version:
00258             return 0
00259         if self.rounds != other.rounds:
00260             return 0
00261         return 1

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def pybench.Test.get_timer (   self) [inherited]
Return the timer function to use for the test.

Definition at line 243 of file pybench.py.

00243 
00244     def get_timer(self):
00245 
00246         """ Return the timer function to use for the test.
00247 
00248         """
00249         return get_timer(self.timer)

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def pybench.Test.run (   self) [inherited]
Run the test in two phases: first calibrate, then
    do the actual test. Be careful to keep the calibration
    timing low w/r to the test timing.

Definition at line 309 of file pybench.py.

00309 
00310     def run(self):
00311 
00312         """ Run the test in two phases: first calibrate, then
00313             do the actual test. Be careful to keep the calibration
00314             timing low w/r to the test timing.
00315 
00316         """
00317         test = self.test
00318         timer = self.get_timer()
00319 
00320         # Get calibration
00321         min_overhead = min(self.overhead_times)
00322 
00323         # Test run
00324         t = timer()
00325         test()
00326         t = timer() - t
00327         if t < MIN_TEST_RUNTIME:
00328             raise ValueError('warp factor too high: '
00329                              'test times are < 10ms')
00330         eff_time = t - min_overhead
00331         if eff_time < 0:
00332             raise ValueError('wrong calibration')
00333         self.last_timing = (eff_time, t, min_overhead)
00334         self.times.append(eff_time)

def pybench.Test.stat (   self) [inherited]
Return test run statistics as tuple:

    (minimum run time,
     average run time,
     total run time,
     average time per operation,
     minimum overhead time)

Definition at line 357 of file pybench.py.

00357 
00358     def stat(self):
00359 
00360         """ Return test run statistics as tuple:
00361 
00362             (minimum run time,
00363              average run time,
00364              total run time,
00365              average time per operation,
00366              minimum overhead time)
00367 
00368         """
00369         runs = len(self.times)
00370         if runs == 0:
00371             return 0.0, 0.0, 0.0, 0.0
00372         min_time = min(self.times)
00373         total_time = sum(self.times)
00374         avg_time = total_time / float(runs)
00375         operation_avg = total_time / float(runs
00376                                            * self.rounds
00377                                            * self.operations)
00378         if self.overhead_times:
00379             min_overhead = min(self.overhead_times)
00380         else:
00381             min_overhead = self.last_timing[2]
00382         return min_time, avg_time, total_time, operation_avg, min_overhead

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Run the test.

    The test needs to run self.rounds executing
    self.operations number of operations each.

Reimplemented from pybench.Test.

Definition at line 376 of file Lookups.py.

00376 
00377     def test(self):
00378 
00379         class c:
00380             pass
00381         o = c()
00382 
00383         for i in range(self.rounds):
00384 
00385             o.__a__ = 2
00386             o.__b__ = 3
00387             o.__c__ = 4
00388 
00389             o.__a__ = 2
00390             o.__b__ = 3
00391             o.__c__ = 4
00392 
00393             o.__a__ = 2
00394             o.__b__ = 3
00395             o.__c__ = 4
00396 
00397             o.__a__ = 2
00398             o.__b__ = 3
00399             o.__c__ = 4
00400 
00401 
00402             x = o.__a__
00403             x = o.__b__
00404             x = o.__c__
00405 
00406             x = o.__a__
00407             x = o.__b__
00408             x = o.__c__
00409 
00410             x = o.__a__
00411             x = o.__b__
00412             x = o.__c__
00413 
00414             x = o.__a__
00415             x = o.__b__
00416             x = o.__c__
00417 
00418             o.__a__ = 2
00419             o.__b__ = 3
00420             o.__c__ = 4
00421 
00422             o.__a__ = 2
00423             o.__b__ = 3
00424             o.__c__ = 4
00425 
00426             o.__a__ = 2
00427             o.__b__ = 3
00428             o.__c__ = 4
00429 
00430             o.__a__ = 2
00431             o.__b__ = 3
00432             o.__c__ = 4
00433 
00434 
00435             x = o.__a__
00436             x = o.__b__
00437             x = o.__c__
00438 
00439             x = o.__a__
00440             x = o.__b__
00441             x = o.__c__
00442 
00443             x = o.__a__
00444             x = o.__b__
00445             x = o.__c__
00446 
00447             x = o.__a__
00448             x = o.__b__
00449             x = o.__c__
00450 
00451             o.__a__ = 2
00452             o.__b__ = 3
00453             o.__c__ = 4
00454 
00455             o.__a__ = 2
00456             o.__b__ = 3
00457             o.__c__ = 4
00458 
00459             o.__a__ = 2
00460             o.__b__ = 3
00461             o.__c__ = 4
00462 
00463             o.__a__ = 2
00464             o.__b__ = 3
00465             o.__c__ = 4
00466 
00467 
00468             x = o.__a__
00469             x = o.__b__
00470             x = o.__c__
00471 
00472             x = o.__a__
00473             x = o.__b__
00474             x = o.__c__
00475 
00476             x = o.__a__
00477             x = o.__b__
00478             x = o.__c__
00479 
00480             x = o.__a__
00481             x = o.__b__
00482             x = o.__c__
00483 
00484             o.__a__ = 2
00485             o.__b__ = 3
00486             o.__c__ = 4
00487 
00488             o.__a__ = 2
00489             o.__b__ = 3
00490             o.__c__ = 4
00491 
00492             o.__a__ = 2
00493             o.__b__ = 3
00494             o.__c__ = 4
00495 
00496             o.__a__ = 2
00497             o.__b__ = 3
00498             o.__c__ = 4
00499 
00500 
00501             x = o.__a__
00502             x = o.__b__
00503             x = o.__c__
00504 
00505             x = o.__a__
00506             x = o.__b__
00507             x = o.__c__
00508 
00509             x = o.__a__
00510             x = o.__b__
00511             x = o.__c__
00512 
00513             x = o.__a__
00514             x = o.__b__
00515             x = o.__c__
00516 
00517             o.__a__ = 2
00518             o.__b__ = 3
00519             o.__c__ = 4
00520 
00521             o.__a__ = 2
00522             o.__b__ = 3
00523             o.__c__ = 4
00524 
00525             o.__a__ = 2
00526             o.__b__ = 3
00527             o.__c__ = 4
00528 
00529             o.__a__ = 2
00530             o.__b__ = 3
00531             o.__c__ = 4
00532 
00533 
00534             x = o.__a__
00535             x = o.__b__
00536             x = o.__c__
00537 
00538             x = o.__a__
00539             x = o.__b__
00540             x = o.__c__
00541 
00542             x = o.__a__
00543             x = o.__b__
00544             x = o.__c__
00545 
00546             x = o.__a__
00547             x = o.__b__
00548             x = o.__c__

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Member Data Documentation

pybench.Test.calibration_runs = CALIBRATION_RUNS [static, inherited]

Definition at line 206 of file pybench.py.

int pybench.Test.is_a_test = 1 [static, inherited]

Internal variables.

Definition at line 197 of file pybench.py.

tuple pybench.Test.last_timing = (0.0, 0.0, 0.0) [static, inherited]

Definition at line 200 of file pybench.py.

Definition at line 332 of file pybench.py.

Reimplemented from pybench.Test.

Definition at line 373 of file Lookups.py.

pybench.Test.overhead_times = None [static, inherited]

Definition at line 209 of file pybench.py.

Reimplemented from pybench.Test.

Definition at line 374 of file Lookups.py.

pybench.Test.timer = TIMER_PLATFORM_DEFAULT [static, inherited]

Definition at line 215 of file pybench.py.

list pybench.Test.times = [] [static, inherited]

Definition at line 212 of file pybench.py.

pybench.Test.times [inherited]

Definition at line 234 of file pybench.py.

Instance variables that each test should override.

Reimplemented from pybench.Test.

Definition at line 372 of file Lookups.py.

int pybench.Test.warp = 1 [static, inherited]

Definition at line 203 of file pybench.py.

pybench.Test.warp [inherited]

Definition at line 224 of file pybench.py.


The documentation for this class was generated from the following file: