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#!/usr/bin/python
#
# Copyright (C) 2017 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Super simplistic printer of a perfprofd output proto. Illustrates
# how to parse and traverse a perfprofd output proto in Python.
# Generate with:
# aprotoc -I=system/extras/perfprofd --python_out=system/extras/perfprofd/scripts \
# system/extras/perfprofd/perf_profile.proto
import perf_profile_pb2
# Make sure that symbol is on the PYTHONPATH, e.g., run as
# PYTHONPATH=$PYTHONPATH:$ANDROID_BUILD_TOP/development/scripts python ...
import symbol
# This is wrong. But then the symbol module is a bad quagmire.
symbol.SetAbi(["ABI: 'arm64'"])
print "Reading symbols from", symbol.SYMBOLS_DIR
# TODO: accept argument for parsing.
file = open('perf.data.encoded.0', 'rb')
data = file.read()
profile = perf_profile_pb2.AndroidPerfProfile()
profile.ParseFromString(data)
print "Total samples: ", profile.total_samples
module_list = profile.load_modules
counters = {}
def indent(txt, stops = 1):
return '\n'.join(' ' * stops + line for line in txt.splitlines())
def print_samples(module_list, programs, process_names, counters):
print 'Samples:'
for program in programs:
process_name = '?'
if program.HasField('process_name_id'):
process_name = process_names[program.process_name_id]
print indent('%s (%s)' % (program.name, process_name), 1)
for module in program.modules:
if module.HasField('load_module_id'):
module_descr = module_list[module.load_module_id]
print indent(module_descr.name, 2)
has_build_id = module_descr.HasField('build_id')
if has_build_id:
print indent('Build ID: %s' % (module_descr.build_id), 3)
for addr in module.address_samples:
# TODO: Stacks vs single samples.
addr_rel = addr.address[0]
addr_rel_hex = "%x" % addr_rel
print indent('%d %s' % (addr.count, addr_rel_hex), 3)
if module_descr.name != '[kernel.kallsyms]':
if has_build_id:
info = symbol.SymbolInformation(module_descr.name, addr_rel_hex)
# As-is, only info[0] (inner-most inlined function) is recognized.
(source_symbol, source_location, object_symbol_with_offset) = info[0]
if object_symbol_with_offset is not None:
print indent(object_symbol_with_offset, 4)
if source_symbol is not None:
for (sym_inlined, loc_inlined, _) in info:
# TODO: Figure out what's going on here:
if sym_inlined is not None:
print indent(sym_inlined, 5)
else:
print indent('???', 5)
if loc_inlined is not None:
print ' %s' % (indent(loc_inlined, 5))
elif module_descr.symbol and (addr_rel & 0x8000000000000000 != 0):
index = 0xffffffffffffffff - addr_rel
source_symbol = module_descr.symbol[index]
print indent(source_symbol, 4)
counters_key = None
if source_symbol is not None:
counters_key = (module_descr.name, source_symbol)
else:
counters_key = (module_descr.name, addr_rel_hex)
if counters_key in counters:
counters[counters_key] = counters[counters_key] + addr.count
else:
counters[counters_key] = addr.count
else:
print indent('<Missing module>', 2)
def print_histogram(counters, size):
# Create a sorted list of top samples.
counter_list = []
for key, value in counters.iteritems():
temp = (key,value)
counter_list.append(temp)
counter_list.sort(key=lambda counter: counter[1], reverse=True)
# Print top-size samples.
print 'Histogram top-%d:' % (size)
for i in xrange(0, min(len(counter_list), size)):
print indent('%d: %s' % (i+1, counter_list[i]), 1)
def print_modules(module_list):
print 'Modules:'
for module in module_list:
print indent(module.name, 1)
if module.HasField('build_id'):
print indent('Build ID: %s' % (module.build_id), 2)
print indent('Symbols:', 2)
for symbol in module.symbol:
print indent(symbol, 3)
def print_process_names(process_names):
print 'Processes:'
for proc in process_names:
print indent(proc, 1)
if profile.HasField('process_names'):
process_names = profile.process_names.name
else:
process_names = []
print_samples(module_list, profile.programs, process_names, counters)
print_modules(module_list)
print_histogram(counters, 100)
print_process_names(process_names)
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