tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Core.py

   1 # Core.py - Python extension for perf script, core functions
   2 #
   3 # Copyright (C) 2010 by Tom Zanussi <tzanussi@gmail.com>
   4 #
   5 # This software may be distributed under the terms of the GNU General
   6 # Public License ("GPL") version 2 as published by the Free Software
   7 # Foundation.
   8
   9 from collections import defaultdict
  10
  11 def autodict():
  12     return defaultdict(autodict)
  13
  14 flag_fields = autodict()
  15 symbolic_fields = autodict()
  16
  17 def define_flag_field(event_name, field_name, delim):
  18     flag_fields[event_name][field_name]['delim'] = delim
  19
  20 def define_flag_value(event_name, field_name, value, field_str):
  21     flag_fields[event_name][field_name]['values'][value] = field_str
  22
  23 def define_symbolic_field(event_name, field_name):
  24     # nothing to do, really
  25     pass
  26
  27 def define_symbolic_value(event_name, field_name, value, field_str):
  28     symbolic_fields[event_name][field_name]['values'][value] = field_str
  29
  30 def flag_str(event_name, field_name, value):
  31     string = ""
  32
  33     if flag_fields[event_name][field_name]:
  34         print_delim = 0
  35         for idx in sorted(flag_fields[event_name][field_name]['values']):
  36             if not value and not idx:
  37                 string += flag_fields[event_name][field_name]['values'][idx]
  38                 break
  39             if idx and (value & idx) == idx:
  40                 if print_delim and flag_fields[event_name][field_name]['delim']:
  41                     string += " " + flag_fields[event_name][field_name]['delim'] + " "
  42                 string += flag_fields[event_name][field_name]['values'][idx]
  43                 print_delim = 1
  44                 value &= ~idx
  45
  46     return string
  47
  48 def symbol_str(event_name, field_name, value):
  49     string = ""
  50
  51     if symbolic_fields[event_name][field_name]:
  52         for idx in sorted(symbolic_fields[event_name][field_name]['values']):
  53             if not value and not idx:
  54                 string = symbolic_fields[event_name][field_name]['values'][idx]
  55                 break
  56             if (value == idx):
  57                 string = symbolic_fields[event_name][field_name]['values'][idx]
  58                 break
  59
  60     return string
  61
  62 trace_flags = { 0x00: "NONE", \
  63                     0x01: "IRQS_OFF", \
  64                     0x02: "IRQS_NOSUPPORT", \
  65                     0x04: "NEED_RESCHED", \
  66                     0x08: "HARDIRQ", \
  67                     0x10: "SOFTIRQ" }
  68
  69 def trace_flag_str(value):
  70     string = ""
  71     print_delim = 0
  72
  73     for idx in trace_flags:
  74         if not value and not idx:
  75             string += "NONE"
  76             break
  77
  78         if idx and (value & idx) == idx:
  79             if print_delim:
  80                 string += " | ";
  81             string += trace_flags[idx]
  82             print_delim = 1
  83             value &= ~idx
  84
  85     return string
  86
  87
  88 def taskState(state):
  89         states = {
  90                 0 : "R",
  91                 1 : "S",
  92                 2 : "D",
  93                 64: "DEAD"
  94         }
  95
  96         if state not in states:
  97                 return "Unknown"
  98
  99         return states[state]
 100
 101
 102 class EventHeaders:
 103         def __init__(self, common_cpu, common_secs, common_nsecs,
 104                      common_pid, common_comm, common_callchain):
 105                 self.cpu = common_cpu
 106                 self.secs = common_secs
 107                 self.nsecs = common_nsecs
 108                 self.pid = common_pid
 109                 self.comm = common_comm
 110                 self.callchain = common_callchain
 111
 112         def ts(self):
 113                 return (self.secs * (10 ** 9)) + self.nsecs
 114
 115         def ts_format(self):
 116                 return "%d.%d" % (self.secs, int(self.nsecs / 1000))