mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
![Vladimir Sementsov-Ogievskiy](/assets/img/avatar_default.png)
Add simple grammar-parsing template benchmark. New tool consume test template written in bash with some special grammar injections and produces multiple tests, run them and finally print a performance comparison table of different tests produced from one template. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210824101517.59802-2-vsementsov@virtuozzo.com> Reviewed-by: Hanna Reitz <hreitz@redhat.com> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
96 lines
3.3 KiB
Python
Executable file
96 lines
3.3 KiB
Python
Executable file
#!/usr/bin/env python3
|
||
#
|
||
# Process img-bench test templates
|
||
#
|
||
# Copyright (c) 2021 Virtuozzo International GmbH.
|
||
#
|
||
# 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 <http://www.gnu.org/licenses/>.
|
||
#
|
||
|
||
|
||
import sys
|
||
import subprocess
|
||
import re
|
||
import json
|
||
|
||
import simplebench
|
||
from results_to_text import results_to_text
|
||
from table_templater import Templater
|
||
|
||
|
||
def bench_func(env, case):
|
||
test = templater.gen(env['data'], case['data'])
|
||
|
||
p = subprocess.run(test, shell=True, stdout=subprocess.PIPE,
|
||
stderr=subprocess.STDOUT, universal_newlines=True)
|
||
|
||
if p.returncode == 0:
|
||
try:
|
||
m = re.search(r'Run completed in (\d+.\d+) seconds.', p.stdout)
|
||
return {'seconds': float(m.group(1))}
|
||
except Exception:
|
||
return {'error': f'failed to parse qemu-img output: {p.stdout}'}
|
||
else:
|
||
return {'error': f'qemu-img failed: {p.returncode}: {p.stdout}'}
|
||
|
||
|
||
if __name__ == '__main__':
|
||
if len(sys.argv) > 1:
|
||
print("""
|
||
Usage: img_bench_templater.py < path/to/test-template.sh
|
||
|
||
This script generates performance tests from a test template (example below),
|
||
runs them, and displays the results in a table. The template is read from
|
||
stdin. It must be written in bash and end with a `qemu-img bench` invocation
|
||
(whose result is parsed to get the test instance’s result).
|
||
|
||
Use the following syntax in the template to create the various different test
|
||
instances:
|
||
|
||
column templating: {var1|var2|...} - test will use different values in
|
||
different columns. You may use several {} constructions in the test, in this
|
||
case product of all choice-sets will be used.
|
||
|
||
row templating: [var1|var2|...] - similar thing to define rows (test-cases)
|
||
|
||
Test template example:
|
||
|
||
Assume you want to compare two qemu-img binaries, called qemu-img-old and
|
||
qemu-img-new in your build directory in two test-cases with 4K writes and 64K
|
||
writes. The template may look like this:
|
||
|
||
qemu_img=/path/to/qemu/build/qemu-img-{old|new}
|
||
$qemu_img create -f qcow2 /ssd/x.qcow2 1G
|
||
$qemu_img bench -c 100 -d 8 [-s 4K|-s 64K] -w -t none -n /ssd/x.qcow2
|
||
|
||
When passing this to stdin of img_bench_templater.py, the resulting comparison
|
||
table will contain two columns (for two binaries) and two rows (for two
|
||
test-cases).
|
||
|
||
In addition to displaying the results, script also stores results in JSON
|
||
format into results.json file in current directory.
|
||
""")
|
||
sys.exit()
|
||
|
||
templater = Templater(sys.stdin.read())
|
||
|
||
envs = [{'id': ' / '.join(x), 'data': x} for x in templater.columns]
|
||
cases = [{'id': ' / '.join(x), 'data': x} for x in templater.rows]
|
||
|
||
result = simplebench.bench(bench_func, envs, cases, count=5,
|
||
initial_run=False)
|
||
print(results_to_text(result))
|
||
with open('results.json', 'w') as f:
|
||
json.dump(result, f, indent=4)
|