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133 lines
3.7 KiB
Python
133 lines
3.7 KiB
Python
#!/usr/bin/env python3
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#
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# Benchmark preallocate filter
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#
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# Copyright (c) 2020 Virtuozzo International GmbH.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import sys
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import os
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import subprocess
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import re
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import json
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import simplebench
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from results_to_text import results_to_text
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def qemu_img_bench(args):
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p = subprocess.run(args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
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universal_newlines=True)
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if p.returncode == 0:
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try:
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m = re.search(r'Run completed in (\d+.\d+) seconds.', p.stdout)
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return {'seconds': float(m.group(1))}
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except Exception:
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return {'error': f'failed to parse qemu-img output: {p.stdout}'}
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else:
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return {'error': f'qemu-img failed: {p.returncode}: {p.stdout}'}
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def bench_func(env, case):
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fname = f"{case['dir']}/prealloc-test.qcow2"
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try:
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os.remove(fname)
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except OSError:
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pass
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subprocess.run([env['qemu-img-binary'], 'create', '-f', 'qcow2', fname,
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'16G'], stdout=subprocess.DEVNULL,
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stderr=subprocess.DEVNULL, check=True)
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args = [env['qemu-img-binary'], 'bench', '-c', str(case['count']),
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'-d', '64', '-s', case['block-size'], '-t', 'none', '-n', '-w']
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if env['prealloc']:
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args += ['--image-opts',
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'driver=qcow2,file.driver=preallocate,file.file.driver=file,'
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f'file.file.filename={fname}']
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else:
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args += ['-f', 'qcow2', fname]
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return qemu_img_bench(args)
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def auto_count_bench_func(env, case):
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case['count'] = 100
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while True:
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res = bench_func(env, case)
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if 'error' in res:
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return res
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if res['seconds'] >= 1:
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break
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case['count'] *= 10
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if res['seconds'] < 5:
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case['count'] = round(case['count'] * 5 / res['seconds'])
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res = bench_func(env, case)
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if 'error' in res:
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return res
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res['iops'] = case['count'] / res['seconds']
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return res
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if __name__ == '__main__':
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if len(sys.argv) < 2:
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print(f'USAGE: {sys.argv[0]} <qemu-img binary> '
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'DISK_NAME:DIR_PATH ...')
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exit(1)
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qemu_img = sys.argv[1]
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envs = [
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{
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'id': 'no-prealloc',
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'qemu-img-binary': qemu_img,
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'prealloc': False
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},
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{
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'id': 'prealloc',
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'qemu-img-binary': qemu_img,
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'prealloc': True
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}
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]
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aligned_cases = []
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unaligned_cases = []
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for disk in sys.argv[2:]:
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name, path = disk.split(':')
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aligned_cases.append({
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'id': f'{name}, aligned sequential 16k',
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'block-size': '16k',
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'dir': path
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})
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unaligned_cases.append({
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'id': f'{name}, unaligned sequential 64k',
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'block-size': '16k',
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'dir': path
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})
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result = simplebench.bench(auto_count_bench_func, envs,
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aligned_cases + unaligned_cases, count=5)
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print(results_to_text(result))
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with open('results.json', 'w') as f:
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json.dump(result, f, indent=4)
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