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1# stackcollapse.py - format perf samples with one line per distinct call stack
2# SPDX-License-Identifier: GPL-2.0
3#
4# This script's output has two space-separated fields. The first is a semicolon
5# separated stack including the program name (from the "comm" field) and the
6# function names from the call stack. The second is a count:
7#
8# swapper;start_kernel;rest_init;cpu_idle;default_idle;native_safe_halt 2
9#
10# The file is sorted according to the first field.
11#
12# Input may be created and processed using:
13#
14# perf record -a -g -F 99 sleep 60
15# perf script report stackcollapse > out.stacks-folded
16#
17# (perf script record stackcollapse works too).
18#
19# Written by Paolo Bonzini <[email protected]>
20# Based on Brendan Gregg's stackcollapse-perf.pl script.
21
22from __future__ import print_function
23
24import os
25import sys
26from collections import defaultdict
27from optparse import OptionParser, make_option
28
29sys.path.append(os.environ['PERF_EXEC_PATH'] + \
30 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
31
32from perf_trace_context import *
33from Core import *
34from EventClass import *
35
36# command line parsing
37
38option_list = [
39 # formatting options for the bottom entry of the stack
40 make_option("--include-tid", dest="include_tid",
41 action="store_true", default=False,
42 help="include thread id in stack"),
43 make_option("--include-pid", dest="include_pid",
44 action="store_true", default=False,
45 help="include process id in stack"),
46 make_option("--no-comm", dest="include_comm",
47 action="store_false", default=True,
48 help="do not separate stacks according to comm"),
49 make_option("--tidy-java", dest="tidy_java",
50 action="store_true", default=False,
51 help="beautify Java signatures"),
52 make_option("--kernel", dest="annotate_kernel",
53 action="store_true", default=False,
54 help="annotate kernel functions with _[k]")
55]
56
57parser = OptionParser(option_list=option_list)
58(opts, args) = parser.parse_args()
59
60if len(args) != 0:
61 parser.error("unexpected command line argument")
62if opts.include_tid and not opts.include_comm:
63 parser.error("requesting tid but not comm is invalid")
64if opts.include_pid and not opts.include_comm:
65 parser.error("requesting pid but not comm is invalid")
66
67# event handlers
68
69lines = defaultdict(lambda: 0)
70
71def process_event(param_dict):
72 def tidy_function_name(sym, dso):
73 if sym is None:
74 sym = '[unknown]'
75
76 sym = sym.replace(';', ':')
77 if opts.tidy_java:
78 # the original stackcollapse-perf.pl script gives the
79 # example of converting this:
80 # Lorg/mozilla/javascript/MemberBox;.<init>(Ljava/lang/reflect/Method;)V
81 # to this:
82 # org/mozilla/javascript/MemberBox:.init
83 sym = sym.replace('<', '')
84 sym = sym.replace('>', '')
85 if sym[0] == 'L' and sym.find('/'):
86 sym = sym[1:]
87 try:
88 sym = sym[:sym.index('(')]
89 except ValueError:
90 pass
91
92 if opts.annotate_kernel and dso == '[kernel.kallsyms]':
93 return sym + '_[k]'
94 else:
95 return sym
96
97 stack = list()
98 if 'callchain' in param_dict:
99 for entry in param_dict['callchain']:
100 entry.setdefault('sym', dict())
101 entry['sym'].setdefault('name', None)
102 entry.setdefault('dso', None)
103 stack.append(tidy_function_name(entry['sym']['name'],
104 entry['dso']))
105 else:
106 param_dict.setdefault('symbol', None)
107 param_dict.setdefault('dso', None)
108 stack.append(tidy_function_name(param_dict['symbol'],
109 param_dict['dso']))
110
111 if opts.include_comm:
112 comm = param_dict["comm"].replace(' ', '_')
113 sep = "-"
114 if opts.include_pid:
115 comm = comm + sep + str(param_dict['sample']['pid'])
116 sep = "/"
117 if opts.include_tid:
118 comm = comm + sep + str(param_dict['sample']['tid'])
119 stack.append(comm)
120
121 stack_string = ';'.join(reversed(stack))
122 lines[stack_string] = lines[stack_string] + 1
123
124def trace_end():
125 list = sorted(lines)
126 for stack in list:
127 print("%s %d" % (stack, lines[stack]))