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# stackcollapse.py - format perf samples with one line per distinct call stack
# SPDX-License-Identifier: GPL-2.0
#
# This script's output has two space-separated fields. The first is a semicolon
# separated stack including the program name (from the "comm" field) and the
# function names from the call stack. The second is a count:
#
# swapper;start_kernel;rest_init;cpu_idle;default_idle;native_safe_halt 2
#
# The file is sorted according to the first field.
#
# Input may be created and processed using:
#
# perf record -a -g -F 99 sleep 60
# perf script report stackcollapse > out.stacks-folded
#
# (perf script record stackcollapse works too).
#
# Written by Paolo Bonzini <pbonzini@redhat.com>
# Based on Brendan Gregg's stackcollapse-perf.pl script.
import os
import sys
from collections import defaultdict
from optparse import OptionParser, make_option
sys.path.append(os.environ['PERF_EXEC_PATH'] + \
'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
from perf_trace_context import *
from Core import *
from EventClass import *
# command line parsing
option_list = [
# formatting options for the bottom entry of the stack
make_option("--include-tid", dest="include_tid",
action="store_true", default=False,
help="include thread id in stack"),
make_option("--include-pid", dest="include_pid",
action="store_true", default=False,
help="include process id in stack"),
make_option("--no-comm", dest="include_comm",
action="store_false", default=True,
help="do not separate stacks according to comm"),
make_option("--tidy-java", dest="tidy_java",
action="store_true", default=False,
help="beautify Java signatures"),
make_option("--kernel", dest="annotate_kernel",
action="store_true", default=False,
help="annotate kernel functions with _[k]")
]
parser = OptionParser(option_list=option_list)
(opts, args) = parser.parse_args()
if len(args) != 0:
parser.error("unexpected command line argument")
if opts.include_tid and not opts.include_comm:
parser.error("requesting tid but not comm is invalid")
if opts.include_pid and not opts.include_comm:
parser.error("requesting pid but not comm is invalid")
# event handlers
lines = defaultdict(lambda: 0)
def process_event(param_dict):
def tidy_function_name(sym, dso):
if sym is None:
sym = '[unknown]'
sym = sym.replace(';', ':')
if opts.tidy_java:
# the original stackcollapse-perf.pl script gives the
# example of converting this:
# Lorg/mozilla/javascript/MemberBox;.<init>(Ljava/lang/reflect/Method;)V
# to this:
# org/mozilla/javascript/MemberBox:.init
sym = sym.replace('<', '')
sym = sym.replace('>', '')
if sym[0] == 'L' and sym.find('/'):
sym = sym[1:]
try:
sym = sym[:sym.index('(')]
except ValueError:
pass
if opts.annotate_kernel and dso == '[kernel.kallsyms]':
return sym + '_[k]'
else:
return sym
stack = list()
if 'callchain' in param_dict:
for entry in param_dict['callchain']:
entry.setdefault('sym', dict())
entry['sym'].setdefault('name', None)
entry.setdefault('dso', None)
stack.append(tidy_function_name(entry['sym']['name'],
entry['dso']))
else:
param_dict.setdefault('symbol', None)
param_dict.setdefault('dso', None)
stack.append(tidy_function_name(param_dict['symbol'],
param_dict['dso']))
if opts.include_comm:
comm = param_dict["comm"].replace(' ', '_')
sep = "-"
if opts.include_pid:
comm = comm + sep + str(param_dict['sample']['pid'])
sep = "/"
if opts.include_tid:
comm = comm + sep + str(param_dict['sample']['tid'])
stack.append(comm)
stack_string = ';'.join(reversed(stack))
lines[stack_string] = lines[stack_string] + 1
def trace_end():
list = lines.keys()
list.sort()
for stack in list:
print "%s %d" % (stack, lines[stack])
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