tools/perf/scripts/python/stackcollapse.py

   1 # stackcollapse.py - format perf samples with one line per distinct call stack
   2 #
   3 # This script's output has two space-separated fields.  The first is a semicolon
   4 # separated stack including the program name (from the "comm" field) and the
   5 # function names from the call stack.  The second is a count:
   6 #
   7 #  swapper;start_kernel;rest_init;cpu_idle;default_idle;native_safe_halt 2
   8 #
   9 # The file is sorted according to the first field.
  10 #
  11 # Input may be created and processed using:
  12 #
  13 #  perf record -a -g -F 99 sleep 60
  14 #  perf script report stackcollapse > out.stacks-folded
  15 #
  16 # (perf script record stackcollapse works too).
  17 #
  18 # Written by Paolo Bonzini <pbonzini@redhat.com>
  19 # Based on Brendan Gregg's stackcollapse-perf.pl script.
  20
  21 import os
  22 import sys
  23 from collections import defaultdict
  24 from optparse import OptionParser, make_option
  25
  26 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
  27                 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
  28
  29 from perf_trace_context import *
  30 from Core import *
  31 from EventClass import *
  32
  33 # command line parsing
  34
  35 option_list = [
  36     # formatting options for the bottom entry of the stack
  37     make_option("--include-tid", dest="include_tid",
  38                  action="store_true", default=False,
  39                  help="include thread id in stack"),
  40     make_option("--include-pid", dest="include_pid",
  41                  action="store_true", default=False,
  42                  help="include process id in stack"),
  43     make_option("--no-comm", dest="include_comm",
  44                  action="store_false", default=True,
  45                  help="do not separate stacks according to comm"),
  46     make_option("--tidy-java", dest="tidy_java",
  47                  action="store_true", default=False,
  48                  help="beautify Java signatures"),
  49     make_option("--kernel", dest="annotate_kernel",
  50                  action="store_true", default=False,
  51                  help="annotate kernel functions with _[k]")
  52 ]
  53
  54 parser = OptionParser(option_list=option_list)
  55 (opts, args) = parser.parse_args()
  56
  57 if len(args) != 0:
  58     parser.error("unexpected command line argument")
  59 if opts.include_tid and not opts.include_comm:
  60     parser.error("requesting tid but not comm is invalid")
  61 if opts.include_pid and not opts.include_comm:
  62     parser.error("requesting pid but not comm is invalid")
  63
  64 # event handlers
  65
  66 lines = defaultdict(lambda: 0)
  67
  68 def process_event(param_dict):
  69     def tidy_function_name(sym, dso):
  70         if sym is None:
  71             sym = '[unknown]'
  72
  73         sym = sym.replace(';', ':')
  74         if opts.tidy_java:
  75             # the original stackcollapse-perf.pl script gives the
  76             # example of converting this:
  77             #    Lorg/mozilla/javascript/MemberBox;.<init>(Ljava/lang/reflect/Method;)V
  78             # to this:
  79             #    org/mozilla/javascript/MemberBox:.init
  80             sym = sym.replace('<', '')
  81             sym = sym.replace('>', '')
  82             if sym[0] == 'L' and sym.find('/'):
  83                 sym = sym[1:]
  84             try:
  85                 sym = sym[:sym.index('(')]
  86             except ValueError:
  87                 pass
  88
  89         if opts.annotate_kernel and dso == '[kernel.kallsyms]':
  90             return sym + '_[k]'
  91         else:
  92             return sym
  93
  94     stack = list()
  95     if 'callchain' in param_dict:
  96         for entry in param_dict['callchain']:
  97             entry.setdefault('sym', dict())
  98             entry['sym'].setdefault('name', None)
  99             entry.setdefault('dso', None)
 100             stack.append(tidy_function_name(entry['sym']['name'],
 101                                             entry['dso']))
 102     else:
 103         param_dict.setdefault('symbol', None)
 104         param_dict.setdefault('dso', None)
 105         stack.append(tidy_function_name(param_dict['symbol'],
 106                                         param_dict['dso']))
 107
 108     if opts.include_comm:
 109         comm = param_dict["comm"].replace(' ', '_')
 110         sep = "-"
 111         if opts.include_pid:
 112             comm = comm + sep + str(param_dict['sample']['pid'])
 113             sep = "/"
 114         if opts.include_tid:
 115             comm = comm + sep + str(param_dict['sample']['tid'])
 116         stack.append(comm)
 117
 118     stack_string = ';'.join(reversed(stack))
 119     lines[stack_string] = lines[stack_string] + 1
 120
 121 def trace_end():
 122     list = lines.keys()
 123     list.sort()
 124     for stack in list:
 125         print "%s %d" % (stack, lines[stack])