Python script that prints the top 25 most executed functions in QEMU using callgrind.
Signed-off-by: Ahmed Karaman <ahmedkhaledkara...@gmail.com> --- scripts/performance/callgrind_top_25.py | 95 +++++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 scripts/performance/callgrind_top_25.py diff --git a/scripts/performance/callgrind_top_25.py b/scripts/performance/callgrind_top_25.py new file mode 100644 index 0000000000..03b089a96d --- /dev/null +++ b/scripts/performance/callgrind_top_25.py @@ -0,0 +1,95 @@ +#!/usr/bin/env python3 + +# Print the top 25 most executed functions in QEMU using callgrind. +# Example Usage: +# callgrind_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, executable) = (sys.argv[1], ' '.join(sys.argv[2:])) + +# Run callgrind and callgrind_annotate +os.system('valgrind --tool=callgrind --callgrind-out-file=callgrind.data {} {} \ + 2 > / dev / null & & callgrind_annotate callgrind.data \ + > tmp.callgrind.data'. + format(qemu, executable)) + +# Line number with the total number of instructions +number_of_instructions_line = 20 + +# Line number with the top function +first_func_line = 25 + +# callgrind_annotate output +callgrind_data = [] + +# Open callgrind_annotate output and store it in callgrind_data +with open('tmp.callgrind.data', 'r') as data: + callgrind_data = data.readlines() + +# Get the total number of instructions +total_number_of_instructions = int( + callgrind_data[number_of_instructions_line].split(' ')[0].replace(',', '')) + +# Number of functions recorded by callgrind +number_of_functions = len(callgrind_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_instructions_line) + +# Store the data of the top functions in top_functions[] +top_functions = callgrind_data[first_func_line: + first_func_line + number_of_top_functions] +# Print information headers +print('{:>4} {:>10} {:<25} {}\n{} {} {} {}'.format('No.', + 'Percentage', + 'Name', + 'Source File', + '-' * 4, + '-' * 10, + '-' * 25, + '-' * 30, + )) + +# Print top 25 functions +for (index, function) in enumerate(top_functions, start=1): + function_data = function.split() + # Calculate function percentage + percentage = (float(function_data[0].replace( + ',', '')) / total_number_of_instructions) * 100 + # Get function source path and name + path, name = function_data[1].split(':') + # Print extracted data + print('{:>4} {:>9.3f}% {:<25} {}'.format(index, + round(percentage, 3), + name, + path)) + +# Remove intermediate files +os.system('rm callgrind.data tmp.callgrind.data') -- 2.17.1