Python script that prints the top 25 most executed functions in QEMU using perf.
Signed-off-by: Ahmed Karaman <ahmedkhaledkara...@gmail.com> --- scripts/performance/perf_top_25.py | 82 ++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 scripts/performance/perf_top_25.py diff --git a/scripts/performance/perf_top_25.py b/scripts/performance/perf_top_25.py new file mode 100644 index 0000000000..eaa8cce3c3 --- /dev/null +++ b/scripts/performance/perf_top_25.py @@ -0,0 +1,82 @@ +#!/usr/bin/env python3 + +# Print the top 25 most executed functions in QEMU using perf. +# Example Usage: +# perf_top_25.py <qemu-build>/x86_64-linux-user/qemu-x86_64 executable +# +# This file is a part of the project "TCG Continuous Benchmarking". +# +# Copyright (C) 2020 Ahmed Karaman <ahmedkhaledkara...@gmail.com> +# Copyright (C) 2020 Aleksandar Markovic <aleksandar.qemu.de...@gmail.com> +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <https://www.gnu.org/licenses/>. + +import os +import sys + +# Ensure sufficient arguments +if len(sys.argv) < 3: + print('Insufficient Script Arguments!') + sys.exit(1) + +# Get the qemu path and the executable + its arguments +(qemu_path, executable) = (sys.argv[1], ' '.join(sys.argv[2:])) + +# Run perf repcord and report +os.system('sudo perf record {} {} 2> /dev/null \ + && sudo perf report --stdio > tmp.perf.data' + .format(qemu_path, executable)) + +# Line number with the top function +first_func_line = 11 + +# Perf report output +perf_data = [] + +# Open perf report output and store it in perf_data +with open('tmp.perf.data', 'r') as data: + perf_data = data.readlines() + +# Number of functions recorded by perf +number_of_functions = len(perf_data) - first_func_line + +# Limit the number of top functions to 25 +number_of_top_functions = (25 if number_of_functions > + 25 else number_of_functions) + +# Store the data of the top functions in top_functions[] +top_functions = perf_data[first_func_line:first_func_line + + number_of_top_functions] + +# Print information headers +print('{:>4} {:>10} {:<25} {}\n{} {} {} {}'.format('No.', + 'Percentage', + 'Name', + 'Caller', + '-' * 4, + '-' * 10, + '-' * 25, + '-' * 25, + )) + +# Print top 25 functions +for (index, function) in enumerate(top_functions, start=1): + function_data = function.split() + print('{:>4} {:>10} {:<25} {}'.format(index, + function_data[0], + function_data[-1], + ' '.join(function_data[2:-2]))) + +# Remove intermediate files +os.system('sudo rm perf.data tmp.perf.data') -- 2.17.1