On Fri, Jun 26, 2020 at 7:00 PM Ahmed Karaman <ahmedkhaledkara...@gmail.com> wrote: > > Syntax: > topN_perf.py [-h] [-n] <number of displayed top functions> -- \ > <qemu executable> [<qemu executable options>] \ > <target executable> [<target execurable options>] > > [-h] - Print the script arguments help message. > [-n] - Specify the number of top functions to print. > - If this flag is not specified, the tool defaults to 25. > > Example of usage: > topN_perf.py -n 20 -- qemu-arm coulomb_double-arm > > Example Output: > No. Percentage Name Invoked by > ---- ---------- ------------------------- ------------------------- > 1 16.25% float64_mul qemu-x86_64 > 2 12.01% float64_sub qemu-x86_64 > 3 11.99% float64_add qemu-x86_64 > 4 5.69% helper_mulsd qemu-x86_64 > 5 4.68% helper_addsd qemu-x86_64 > 6 4.43% helper_lookup_tb_ptr qemu-x86_64 > 7 4.28% helper_subsd qemu-x86_64 > 8 2.71% f64_compare qemu-x86_64 > 9 2.71% helper_ucomisd qemu-x86_64 > 10 1.04% helper_pand_xmm qemu-x86_64 > 11 0.71% float64_div qemu-x86_64 > 12 0.63% helper_pxor_xmm qemu-x86_64 > 13 0.50% 0x00007f7b7004ef95 [JIT] tid 491 > 14 0.50% 0x00007f7b70044e83 [JIT] tid 491 > 15 0.36% helper_por_xmm qemu-x86_64 > 16 0.32% helper_cc_compute_all qemu-x86_64 > 17 0.30% 0x00007f7b700433f0 [JIT] tid 491 > 18 0.30% float64_compare_quiet qemu-x86_64 > 19 0.27% soft_f64_addsub qemu-x86_64 > 20 0.26% round_to_int qemu-x86_64 > > Signed-off-by: Ahmed Karaman <ahmedkhaledkara...@gmail.com> > ---
Reviewed-by: Aleksandar Markovic <aleksandar.qemu.de...@gmail.com> Applied to "TCG Continuous Benchmarking" queue. > scripts/performance/topN_perf.py | 149 +++++++++++++++++++++++++++++++ > 1 file changed, 149 insertions(+) > create mode 100755 scripts/performance/topN_perf.py > > diff --git a/scripts/performance/topN_perf.py > b/scripts/performance/topN_perf.py > new file mode 100755 > index 0000000000..07be195fc8 > --- /dev/null > +++ b/scripts/performance/topN_perf.py > @@ -0,0 +1,149 @@ > +#!/usr/bin/env python3 > + > +# Print the top N most executed functions in QEMU using perf. > +# Syntax: > +# topN_perf.py [-h] [-n] <number of displayed top functions> -- \ > +# <qemu executable> [<qemu executable options>] \ > +# <target executable> [<target execurable options>] > +# > +# [-h] - Print the script arguments help message. > +# [-n] - Specify the number of top functions to print. > +# - If this flag is not specified, the tool defaults to 25. > +# > +# Example of usage: > +# topN_perf.py -n 20 -- qemu-arm coulomb_double-arm > +# > +# 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 argparse > +import os > +import subprocess > +import sys > + > + > +# Parse the command line arguments > +parser = argparse.ArgumentParser( > + usage='topN_perf.py [-h] [-n] <number of displayed top functions > -- ' > + '<qemu executable> [<qemu executable options>] ' > + '<target executable> [<target executable options>]') > + > +parser.add_argument('-n', dest='top', type=int, default=25, > + help='Specify the number of top functions to print.') > + > +parser.add_argument('command', type=str, nargs='+', help=argparse.SUPPRESS) > + > +args = parser.parse_args() > + > +# Extract the needed variables from the args > +command = args.command > +top = args.top > + > +# Insure that perf is installed > +check_perf_presence = subprocess.run(["which", "perf"], > + stdout=subprocess.DEVNULL) > +if check_perf_presence.returncode: > + sys.exit("Please install perf before running the script!") > + > +# Insure user has previllage to run perf > +check_perf_executability = subprocess.run(["perf", "stat", "ls", "/"], > + stdout=subprocess.DEVNULL, > + stderr=subprocess.DEVNULL) > +if check_perf_executability.returncode: > + sys.exit( > +""" > +Error: > +You may not have permission to collect stats. > + > +Consider tweaking /proc/sys/kernel/perf_event_paranoid, > +which controls use of the performance events system by > +unprivileged users (without CAP_SYS_ADMIN). > + > + -1: Allow use of (almost) all events by all users > + Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK > + 0: Disallow ftrace function tracepoint by users without CAP_SYS_ADMIN > + Disallow raw tracepoint access by users without CAP_SYS_ADMIN > + 1: Disallow CPU event access by users without CAP_SYS_ADMIN > + 2: Disallow kernel profiling by users without CAP_SYS_ADMIN > + > +To make this setting permanent, edit /etc/sysctl.conf too, e.g.: > + kernel.perf_event_paranoid = -1 > + > +* Alternatively, you can run this script under sudo privileges. > +""" > +) > + > +# Run perf record > +perf_record = subprocess.run((["perf", "record", "--output=/tmp/perf.data"] + > + command), > + stdout=subprocess.DEVNULL, > + stderr=subprocess.PIPE) > +if perf_record.returncode: > + os.unlink('/tmp/perf.data') > + sys.exit(perf_record.stderr.decode("utf-8")) > + > +# Save perf report output to /tmp/perf_report.out > +with open("/tmp/perf_report.out", "w") as output: > + perf_report = subprocess.run( > + ["perf", "report", "--input=/tmp/perf.data", "--stdio"], > + stdout=output, > + stderr=subprocess.PIPE) > + if perf_report.returncode: > + os.unlink('/tmp/perf.data') > + output.close() > + os.unlink('/tmp/perf_report.out') > + sys.exit(perf_report.stderr.decode("utf-8")) > + > +# Read the reported data to functions[] > +functions = [] > +with open("/tmp/perf_report.out", "r") as data: > + # Only read lines that are not comments (comments start with #) > + # Only read lines that are not empty > + functions = [line for line in data.readlines() if line and line[0] > + != '#' and line[0] != "\n"] > + > +# Limit the number of top functions to "top" > +number_of_top_functions = top if len(functions) > top else len(functions) > + > +# Store the data of the top functions in top_functions[] > +top_functions = functions[:number_of_top_functions] > + > +# Print table header > +print('{:>4} {:>10} {:<30} {}\n{} {} {} {}'.format('No.', > + 'Percentage', > + 'Name', > + 'Invoked by', > + '-' * 4, > + '-' * 10, > + '-' * 30, > + '-' * 25)) > + > +# Print top N functions > +for (index, function) in enumerate(top_functions, start=1): > + function_data = function.split() > + function_percentage = function_data[0] > + function_name = function_data[-1] > + function_invoker = ' '.join(function_data[2:-2]) > + print('{:>4} {:>10} {:<30} {}'.format(index, > + function_percentage, > + function_name, > + function_invoker)) > + > +# Remove intermediate files > +os.unlink('/tmp/perf.data') > +os.unlink('/tmp/perf_report.out') > -- > 2.17.1 > >