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