Package lldb :: Package formatters :: Module metrics |
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# Source Code for Module lldb.formatters.metrics

     1  """
     2  Objective-C runtime wrapper for use by LLDB Python formatters
     3
     4  part of The LLVM Compiler Infrastructure
     5  This file is distributed under the University of Illinois Open Source
     6  License. See LICENSE.TXT for details.
     7  """
     8  import lldb
     9  import time, datetime
    10  import inspect
    11
    12 -class TimeMetrics:
    13          @staticmethod
    14 -        def generate(label=None):
    15                  return TimeMetrics(label)
    16
    17 -        def __init__(self,lbl=None):
    18                  self.label = "" if lbl is None else lbl
    19                  pass
    20
    21 -        def __enter__(self):
    22                  caller = inspect.stack()[1]
    23                  self.function = str(caller)
    24                  self.enter_time = time.clock()
    25
    26 -        def __exit__(self, a,b,c):
    27                  self.exit_time = time.clock()
    28                  print "It took " + str(self.exit_time - self.enter_time) + " time units to run through " + self.function + self.label
    29                  return False
    30
    31 -class Counter:
    32 -        def __init__(self):
    33                  self.count = 0
    34                  self.list = []
    35 -        def update(self,name):
    36                  self.count = self.count + 1
    37                  # avoid getting the full dump of this ValueObject just to save its metrics
    38                  if isinstance(name,lldb.SBValue):
    39                          self.list.append(name.GetName())
    40                  else:
    41                          self.list.append(str(name))
    42 -        def __str__(self):
    43                  return str(self.count) + " times, for items [" + str(self.list) + "]"
    44
    45 -class MetricsPrinter_Verbose:
    46 -        def __init__(self,metrics):
    47                  self.metrics = metrics
    48 -        def __str__(self):
    49                  string = ""
    50                  for key,value in self.metrics.metrics.items():
    51                          string = string + "metric " + str(key) + ": " + str(value) + "\n"
    52                  return string
    53
    54 -class MetricsPrinter_Compact:
    55 -        def __init__(self,metrics):
    56                  self.metrics = metrics
    57 -        def __str__(self):
    58                  string = ""
    59                  for key,value in self.metrics.metrics.items():
    60                          string = string + "metric " + str(key) + " was hit " + str(value.count) + " times\n"
    61                  return string
    62
    63 -class Metrics:
    64 -        def __init__(self):
    65                  self.metrics = {}
    66
    67 -        def add_metric(self,name):
    68                  self.metrics[name] = Counter()
    69
    70 -        def metric_hit(self,metric,trigger):
    71                  self.metrics[metric].update(trigger)
    72
    73 -        def __getitem__(self,key):
    74                  return self.metrics[key]
    75
    76 -        def __getattr__(self,name):
    77                  if name == 'compact':
    78                          return MetricsPrinter_Compact(self)
    79                  if name == 'verbose':
    80                          return MetricsPrinter_Verbose(self)
    81                  raise AttributeError("%r object has no attribute %r" %
    82                                                   (type(self).__name__, name))
    83
    84 -        def __str__(self):
    85                  return str(self.verbose)
    86
    87 -        def metric_success(self,metric):
    88                  total_count = 0
    89                  metric_count = self[metric].count
    90                  for key,value in self.metrics.items():
    91                          total_count = total_count + value.count
    92                  if total_count > 0:
    93                          return metric_count / float(total_count)
    94                  return 0
    95