projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | """Statistics analyzer for HotShot.""" |
| 2 | ||
| 3 | import profile | |
| 4 | import pstats | |
| 5 | ||
| 6 | import hotshot.log | |
| 7 | ||
| 8 | from hotshot.log import ENTER, EXIT | |
| 9 | ||
| 10 | ||
| 11 | def load(filename): | |
| 12 | return StatsLoader(filename).load() | |
| 13 | ||
| 14 | ||
| 15 | class StatsLoader: | |
| 16 | def __init__(self, logfn): | |
| 17 | self._logfn = logfn | |
| 18 | self._code = {} | |
| 19 | self._stack = [] | |
| 20 | self.pop_frame = self._stack.pop | |
| 21 | ||
| 22 | def load(self): | |
| 23 | # The timer selected by the profiler should never be used, so make | |
| 24 | # sure it doesn't work: | |
| 25 | p = Profile() | |
| 26 | p.get_time = _brokentimer | |
| 27 | log = hotshot.log.LogReader(self._logfn) | |
| 28 | taccum = 0 | |
| 29 | for event in log: | |
| 30 | what, (filename, lineno, funcname), tdelta = event | |
| 31 | if tdelta > 0: | |
| 32 | taccum += tdelta | |
| 33 | ||
| 34 | # We multiply taccum to convert from the microseconds we | |
| 35 | # have to the seconds that the profile/pstats module work | |
| 36 | # with; this allows the numbers to have some basis in | |
| 37 | # reality (ignoring calibration issues for now). | |
| 38 | ||
| 39 | if what == ENTER: | |
| 40 | frame = self.new_frame(filename, lineno, funcname) | |
| 41 | p.trace_dispatch_call(frame, taccum * .000001) | |
| 42 | taccum = 0 | |
| 43 | ||
| 44 | elif what == EXIT: | |
| 45 | frame = self.pop_frame() | |
| 46 | p.trace_dispatch_return(frame, taccum * .000001) | |
| 47 | taccum = 0 | |
| 48 | ||
| 49 | # no further work for line events | |
| 50 | ||
| 51 | assert not self._stack | |
| 52 | return pstats.Stats(p) | |
| 53 | ||
| 54 | def new_frame(self, *args): | |
| 55 | # args must be filename, firstlineno, funcname | |
| 56 | # our code objects are cached since we don't need to create | |
| 57 | # new ones every time | |
| 58 | try: | |
| 59 | code = self._code[args] | |
| 60 | except KeyError: | |
| 61 | code = FakeCode(*args) | |
| 62 | self._code[args] = code | |
| 63 | # frame objects are create fresh, since the back pointer will | |
| 64 | # vary considerably | |
| 65 | if self._stack: | |
| 66 | back = self._stack[-1] | |
| 67 | else: | |
| 68 | back = None | |
| 69 | frame = FakeFrame(code, back) | |
| 70 | self._stack.append(frame) | |
| 71 | return frame | |
| 72 | ||
| 73 | ||
| 74 | class Profile(profile.Profile): | |
| 75 | def simulate_cmd_complete(self): | |
| 76 | pass | |
| 77 | ||
| 78 | ||
| 79 | class FakeCode: | |
| 80 | def __init__(self, filename, firstlineno, funcname): | |
| 81 | self.co_filename = filename | |
| 82 | self.co_firstlineno = firstlineno | |
| 83 | self.co_name = self.__name__ = funcname | |
| 84 | ||
| 85 | ||
| 86 | class FakeFrame: | |
| 87 | def __init__(self, code, back): | |
| 88 | self.f_back = back | |
| 89 | self.f_code = code | |
| 90 | ||
| 91 | ||
| 92 | def _brokentimer(): | |
| 93 | raise RuntimeError, "this timer should not be called" |