94 lines
2.5 KiB
Python
94 lines
2.5 KiB
Python
"""Statistics analyzer for HotShot."""
|
|
|
|
import profile
|
|
import pstats
|
|
|
|
import hotshot.log
|
|
|
|
from hotshot.log import ENTER, EXIT
|
|
|
|
|
|
def load(filename):
|
|
return StatsLoader(filename).load()
|
|
|
|
|
|
class StatsLoader:
|
|
def __init__(self, logfn):
|
|
self._logfn = logfn
|
|
self._code = {}
|
|
self._stack = []
|
|
self.pop_frame = self._stack.pop
|
|
|
|
def load(self):
|
|
# The timer selected by the profiler should never be used, so make
|
|
# sure it doesn't work:
|
|
p = Profile()
|
|
p.get_time = _brokentimer
|
|
log = hotshot.log.LogReader(self._logfn)
|
|
taccum = 0
|
|
for event in log:
|
|
what, (filename, lineno, funcname), tdelta = event
|
|
if tdelta > 0:
|
|
taccum += tdelta
|
|
|
|
# We multiply taccum to convert from the microseconds we
|
|
# have to the seconds that the profile/pstats module work
|
|
# with; this allows the numbers to have some basis in
|
|
# reality (ignoring calibration issues for now).
|
|
|
|
if what == ENTER:
|
|
frame = self.new_frame(filename, lineno, funcname)
|
|
p.trace_dispatch_call(frame, taccum * .000001)
|
|
taccum = 0
|
|
|
|
elif what == EXIT:
|
|
frame = self.pop_frame()
|
|
p.trace_dispatch_return(frame, taccum * .000001)
|
|
taccum = 0
|
|
|
|
# no further work for line events
|
|
|
|
assert not self._stack
|
|
return pstats.Stats(p)
|
|
|
|
def new_frame(self, *args):
|
|
# args must be filename, firstlineno, funcname
|
|
# our code objects are cached since we don't need to create
|
|
# new ones every time
|
|
try:
|
|
code = self._code[args]
|
|
except KeyError:
|
|
code = FakeCode(*args)
|
|
self._code[args] = code
|
|
# frame objects are create fresh, since the back pointer will
|
|
# vary considerably
|
|
if self._stack:
|
|
back = self._stack[-1]
|
|
else:
|
|
back = None
|
|
frame = FakeFrame(code, back)
|
|
self._stack.append(frame)
|
|
return frame
|
|
|
|
|
|
class Profile(profile.Profile):
|
|
def simulate_cmd_complete(self):
|
|
pass
|
|
|
|
|
|
class FakeCode:
|
|
def __init__(self, filename, firstlineno, funcname):
|
|
self.co_filename = filename
|
|
self.co_firstlineno = firstlineno
|
|
self.co_name = self.__name__ = funcname
|
|
|
|
|
|
class FakeFrame:
|
|
def __init__(self, code, back):
|
|
self.f_back = back
|
|
self.f_code = code
|
|
|
|
|
|
def _brokentimer():
|
|
raise RuntimeError("this timer should not be called")
|