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https://gitlab.com/qemu-project/qemu
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![Vladimir Sementsov-Ogievskiy](/assets/img/avatar_default.png)
Add an option to drop caches before each test run. It may probably improve reliability of results when testing in cached mode. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
229 lines
7.9 KiB
Python
Executable file
229 lines
7.9 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# Bench backup block-job
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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 argparse
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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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from bench_block_job import bench_block_copy, drv_file, drv_nbd, drv_qcow2
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def bench_func(env, case):
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""" Handle one "cell" of benchmarking table. """
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cmd_options = env['cmd-options'] if 'cmd-options' in env else {}
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return bench_block_copy(env['qemu-binary'], env['cmd'],
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cmd_options,
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case['source'], case['target'])
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def bench(args):
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test_cases = []
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# paths with colon not supported, so we just split by ':'
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dirs = dict(d.split(':') for d in args.dir)
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nbd_drv = None
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if args.nbd:
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nbd = args.nbd.split(':')
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host = nbd[0]
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port = '10809' if len(nbd) == 1 else nbd[1]
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nbd_drv = drv_nbd(host, port)
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for t in args.test:
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src, dst = t.split(':')
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if src == 'nbd' and dst == 'nbd':
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raise ValueError("Can't use 'nbd' label for both src and dst")
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if (src == 'nbd' or dst == 'nbd') and not nbd_drv:
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raise ValueError("'nbd' label used but --nbd is not given")
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if src == 'nbd':
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source = nbd_drv
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elif args.qcow2_sources:
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source = drv_qcow2(drv_file(dirs[src] + '/test-source.qcow2'))
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else:
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source = drv_file(dirs[src] + '/test-source')
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if dst == 'nbd':
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test_cases.append({'id': t, 'source': source, 'target': nbd_drv})
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continue
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if args.target_cache == 'both':
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target_caches = ['direct', 'cached']
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else:
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target_caches = [args.target_cache]
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for c in target_caches:
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o_direct = c == 'direct'
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fname = dirs[dst] + '/test-target'
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if args.compressed:
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fname += '.qcow2'
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target = drv_file(fname, o_direct=o_direct)
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if args.compressed:
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target = drv_qcow2(target)
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test_id = t
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if args.target_cache == 'both':
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test_id += f'({c})'
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test_cases.append({'id': test_id, 'source': source,
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'target': target})
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binaries = [] # list of (<label>, <path>, [<options>])
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for i, q in enumerate(args.env):
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name_path = q.split(':')
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if len(name_path) == 1:
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label = f'q{i}'
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path_opts = name_path[0].split(',')
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else:
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assert len(name_path) == 2 # paths with colon not supported
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label = name_path[0]
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path_opts = name_path[1].split(',')
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binaries.append((label, path_opts[0], path_opts[1:]))
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test_envs = []
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bin_paths = {}
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for i, q in enumerate(args.env):
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opts = q.split(',')
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label_path = opts[0]
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opts = opts[1:]
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if ':' in label_path:
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# path with colon inside is not supported
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label, path = label_path.split(':')
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bin_paths[label] = path
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elif label_path in bin_paths:
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label = label_path
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path = bin_paths[label]
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else:
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path = label_path
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label = f'q{i}'
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bin_paths[label] = path
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x_perf = {}
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is_mirror = False
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for opt in opts:
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if opt == 'mirror':
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is_mirror = True
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elif opt == 'copy-range=on':
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x_perf['use-copy-range'] = True
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elif opt == 'copy-range=off':
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x_perf['use-copy-range'] = False
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elif opt.startswith('max-workers='):
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x_perf['max-workers'] = int(opt.split('=')[1])
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backup_options = {}
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if x_perf:
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backup_options['x-perf'] = x_perf
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if args.compressed:
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backup_options['compress'] = True
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if is_mirror:
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assert not x_perf
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test_envs.append({
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'id': f'mirror({label})',
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'cmd': 'blockdev-mirror',
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'qemu-binary': path
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})
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else:
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test_envs.append({
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'id': f'backup({label})\n' + '\n'.join(opts),
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'cmd': 'blockdev-backup',
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'cmd-options': backup_options,
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'qemu-binary': path
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})
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result = simplebench.bench(bench_func, test_envs, test_cases,
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count=args.count, initial_run=args.initial_run,
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drop_caches=args.drop_caches)
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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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print(results_to_text(result))
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class ExtendAction(argparse.Action):
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def __call__(self, parser, namespace, values, option_string=None):
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items = getattr(namespace, self.dest) or []
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items.extend(values)
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setattr(namespace, self.dest, items)
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if __name__ == '__main__':
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p = argparse.ArgumentParser('Backup benchmark', epilog='''
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ENV format
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(LABEL:PATH|LABEL|PATH)[,max-workers=N][,use-copy-range=(on|off)][,mirror]
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LABEL short name for the binary
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PATH path to the binary
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max-workers set x-perf.max-workers of backup job
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use-copy-range set x-perf.use-copy-range of backup job
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mirror use mirror job instead of backup''',
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formatter_class=argparse.RawTextHelpFormatter)
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p.add_argument('--env', nargs='+', help='''\
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Qemu binaries with labels and options, see below
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"ENV format" section''',
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action=ExtendAction)
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p.add_argument('--dir', nargs='+', help='''\
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Directories, each containing "test-source" and/or
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"test-target" files, raw images to used in
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benchmarking. File path with label, like
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label:/path/to/directory''',
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action=ExtendAction)
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p.add_argument('--nbd', help='''\
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host:port for remote NBD image, (or just host, for
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default port 10809). Use it in tests, label is "nbd"
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(but you cannot create test nbd:nbd).''')
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p.add_argument('--test', nargs='+', help='''\
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Tests, in form source-dir-label:target-dir-label''',
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action=ExtendAction)
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p.add_argument('--compressed', help='''\
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Use compressed backup. It automatically means
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automatically creating qcow2 target with
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lazy_refcounts for each test run''', action='store_true')
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p.add_argument('--qcow2-sources', help='''\
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Use test-source.qcow2 images as sources instead of
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test-source raw images''', action='store_true')
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p.add_argument('--target-cache', help='''\
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Setup cache for target nodes. Options:
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direct: default, use O_DIRECT and aio=native
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cached: use system cache (Qemu default) and aio=threads (Qemu default)
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both: generate two test cases for each src:dst pair''',
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default='direct', choices=('direct', 'cached', 'both'))
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p.add_argument('--count', type=int, default=3, help='''\
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Number of test runs per table cell''')
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# BooleanOptionalAction helps to support --no-initial-run option
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p.add_argument('--initial-run', action=argparse.BooleanOptionalAction,
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help='''\
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Do additional initial run per cell which doesn't count in result,
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default true''')
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p.add_argument('--drop-caches', action='store_true', help='''\
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Do "sync; echo 3 > /proc/sys/vm/drop_caches" before each test run''')
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bench(p.parse_args())
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