On Fri, Jun 26, 2020 at 6:59 PM Ahmed Karaman <ahmedkhaledkara...@gmail.com> wrote: > > Python script that prints the top N most executed functions in QEMU > using callgrind. > > Syntax: > topN_callgrind.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_callgrind.py -n 20 -- qemu-arm coulomb_double-arm > > Example Output: > No. Percentage Function Name Source File > ---- --------- ------------------ ------------------------------ > 1 24.577% 0x00000000082db000 ??? > 2 20.467% float64_mul <qemu>/fpu/softfloat.c > 3 14.720% float64_sub <qemu>/fpu/softfloat.c > 4 13.864% float64_add <qemu>/fpu/softfloat.c > 5 4.876% helper_mulsd <qemu>/target/i386/ops_sse.h > 6 3.767% helper_subsd <qemu>/target/i386/ops_sse.h > 7 3.549% helper_addsd <qemu>/target/i386/ops_sse.h > 8 2.185% helper_ucomisd <qemu>/target/i386/ops_sse.h > 9 1.667% helper_lookup_tb_ptr <qemu>/include/exec/tb-lookup.h > 10 1.662% f64_compare <qemu>/fpu/softfloat.c > 11 1.509% helper_lookup_tb_ptr <qemu>/accel/tcg/tcg-runtime.c > 12 0.635% helper_lookup_tb_ptr <qemu>/include/exec/exec-all.h > 13 0.616% float64_div <qemu>/fpu/softfloat.c > 14 0.502% helper_pand_xmm <qemu>/target/i386/ops_sse.h > 15 0.502% float64_mul <qemu>/include/fpu/softfloat.h > 16 0.476% helper_lookup_tb_ptr <qemu>/target/i386/cpu.h > 17 0.437% float64_compare_quiet <qemu>/fpu/softfloat.c > 18 0.414% helper_pxor_xmm <qemu>/target/i386/ops_sse.h > 19 0.353% round_to_int <qemu>/fpu/softfloat.c > 20 0.347% helper_cc_compute_all <qemu>/target/i386/cc_helper.c > > 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_callgrind.py | 140 ++++++++++++++++++++++++++ > 1 file changed, 140 insertions(+) > create mode 100755 scripts/performance/topN_callgrind.py > > diff --git a/scripts/performance/topN_callgrind.py > b/scripts/performance/topN_callgrind.py > new file mode 100755 > index 0000000000..67c59197af > --- /dev/null > +++ b/scripts/performance/topN_callgrind.py > @@ -0,0 +1,140 @@ > +#!/usr/bin/env python3 > + > +# Print the top N most executed functions in QEMU using callgrind. > +# Syntax: > +# topN_callgrind.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_callgrind.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_callgrind.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 valgrind is installed > +check_valgrind_presence = subprocess.run(["which", "valgrind"], > + stdout=subprocess.DEVNULL) > +if check_valgrind_presence.returncode: > + sys.exit("Please install valgrind before running the script!") > + > +# Run callgrind > +callgrind = subprocess.run(( > + ["valgrind", "--tool=callgrind", > "--callgrind-out-file=/tmp/callgrind.data"] > + + command), > + stdout=subprocess.DEVNULL, > + stderr=subprocess.PIPE) > +if callgrind.returncode: > + sys.exit(callgrind.stderr.decode("utf-8")) > + > +# Save callgrind_annotate output to /tmp/callgrind_annotate.out > +with open("/tmp/callgrind_annotate.out", "w") as output: > + callgrind_annotate = subprocess.run(["callgrind_annotate", > + "/tmp/callgrind.data"], > + stdout=output, > + stderr=subprocess.PIPE) > + if callgrind_annotate.returncode: > + os.unlink('/tmp/callgrind.data') > + output.close() > + os.unlink('/tmp/callgrind_annotate.out') > + sys.exit(callgrind_annotate.stderr.decode("utf-8")) > + > +# Read the callgrind_annotate output to callgrind_data[] > +callgrind_data = [] > +with open('/tmp/callgrind_annotate.out', 'r') as data: > + callgrind_data = data.readlines() > + > +# Line number with the total number of instructions > +total_instructions_line_number = 20 > + > +# Get the total number of instructions > +total_instructions_line_data = callgrind_data[total_instructions_line_number] > +total_number_of_instructions = total_instructions_line_data.split(' ')[0] > +total_number_of_instructions = int( > + total_number_of_instructions.replace(',', '')) > + > +# Line number with the top function > +first_func_line = 25 > + > +# Number of functions recorded by callgrind, last two lines are always empty > +number_of_functions = len(callgrind_data) - first_func_line - 2 > + > +# Limit the number of top functions to "top" > +number_of_top_functions = (top if number_of_functions > > + top else number_of_functions) > + > +# 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 table header > +print('{:>4} {:>10} {:<30} {}\n{} {} {} {}'.format('No.', > + 'Percentage', > + 'Function Name', > + 'Source File', > + '-' * 4, > + '-' * 10, > + '-' * 30, > + '-' * 30, > + )) > + > +# Print top N functions > +for (index, function) in enumerate(top_functions, start=1): > + function_data = function.split() > + # Calculate function percentage > + function_instructions = float(function_data[0].replace(',', '')) > + function_percentage = (function_instructions / > + total_number_of_instructions)*100 > + # Get function name and source files path > + function_source_file, function_name = function_data[1].split(':') > + # Print extracted data > + print('{:>4} {:>9.3f}% {:<30} {}'.format(index, > + round(function_percentage, > 3), > + function_name, > + function_source_file)) > + > +# Remove intermediate files > +os.unlink('/tmp/callgrind.data') > +os.unlink('/tmp/callgrind_annotate.out') > -- > 2.17.1 > >