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#!/usr/bin/env python3
#
# Bench backup block-job
#
# Copyright (c) 2020 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 argparse
import json
import simplebench
from results_to_text import results_to_text
from bench_block_job import bench_block_copy, drv_file, drv_nbd, drv_qcow2
def bench_func(env, case):
""" Handle one "cell" of benchmarking table. """
cmd_options = env['cmd-options'] if 'cmd-options' in env else {}
return bench_block_copy(env['qemu-binary'], env['cmd'],
cmd_options,
case['source'], case['target'])
def bench(args):
test_cases = []
# paths with colon not supported, so we just split by ':'
dirs = dict(d.split(':') for d in args.dir)
nbd_drv = None
if args.nbd:
nbd = args.nbd.split(':')
host = nbd[0]
port = '10809' if len(nbd) == 1 else nbd[1]
nbd_drv = drv_nbd(host, port)
for t in args.test:
src, dst = t.split(':')
if src == 'nbd' and dst == 'nbd':
raise ValueError("Can't use 'nbd' label for both src and dst")
if (src == 'nbd' or dst == 'nbd') and not nbd_drv:
raise ValueError("'nbd' label used but --nbd is not given")
if src == 'nbd':
source = nbd_drv
elif args.qcow2_sources:
source = drv_qcow2(drv_file(dirs[src] + '/test-source.qcow2'))
else:
source = drv_file(dirs[src] + '/test-source')
if dst == 'nbd':
test_cases.append({'id': t, 'source': source, 'target': nbd_drv})
continue
if args.target_cache == 'both':
target_caches = ['direct', 'cached']
else:
target_caches = [args.target_cache]
for c in target_caches:
o_direct = c == 'direct'
fname = dirs[dst] + '/test-target'
if args.compressed:
fname += '.qcow2'
target = drv_file(fname, o_direct=o_direct)
if args.compressed:
target = drv_qcow2(target)
test_id = t
if args.target_cache == 'both':
test_id += f'({c})'
test_cases.append({'id': test_id, 'source': source,
'target': target})
binaries = [] # list of (<label>, <path>, [<options>])
for i, q in enumerate(args.env):
name_path = q.split(':')
if len(name_path) == 1:
label = f'q{i}'
path_opts = name_path[0].split(',')
else:
assert len(name_path) == 2 # paths with colon not supported
label = name_path[0]
path_opts = name_path[1].split(',')
binaries.append((label, path_opts[0], path_opts[1:]))
test_envs = []
bin_paths = {}
for i, q in enumerate(args.env):
opts = q.split(',')
label_path = opts[0]
opts = opts[1:]
if ':' in label_path:
# path with colon inside is not supported
label, path = label_path.split(':')
bin_paths[label] = path
elif label_path in bin_paths:
label = label_path
path = bin_paths[label]
else:
path = label_path
label = f'q{i}'
bin_paths[label] = path
x_perf = {}
is_mirror = False
for opt in opts:
if opt == 'mirror':
is_mirror = True
elif opt == 'copy-range=on':
x_perf['use-copy-range'] = True
elif opt == 'copy-range=off':
x_perf['use-copy-range'] = False
elif opt.startswith('max-workers='):
x_perf['max-workers'] = int(opt.split('=')[1])
backup_options = {}
if x_perf:
backup_options['x-perf'] = x_perf
if args.compressed:
backup_options['compress'] = True
if is_mirror:
assert not x_perf
test_envs.append({
'id': f'mirror({label})',
'cmd': 'blockdev-mirror',
'qemu-binary': path
})
else:
test_envs.append({
'id': f'backup({label})\n' + '\n'.join(opts),
'cmd': 'blockdev-backup',
'cmd-options': backup_options,
'qemu-binary': path
})
result = simplebench.bench(bench_func, test_envs, test_cases,
count=args.count, initial_run=args.initial_run,
drop_caches=args.drop_caches)
with open('results.json', 'w') as f:
json.dump(result, f, indent=4)
print(results_to_text(result))
class ExtendAction(argparse.Action):
def __call__(self, parser, namespace, values, option_string=None):
items = getattr(namespace, self.dest) or []
items.extend(values)
setattr(namespace, self.dest, items)
if __name__ == '__main__':
p = argparse.ArgumentParser('Backup benchmark', epilog='''
ENV format
(LABEL:PATH|LABEL|PATH)[,max-workers=N][,use-copy-range=(on|off)][,mirror]
LABEL short name for the binary
PATH path to the binary
max-workers set x-perf.max-workers of backup job
use-copy-range set x-perf.use-copy-range of backup job
mirror use mirror job instead of backup''',
formatter_class=argparse.RawTextHelpFormatter)
p.add_argument('--env', nargs='+', help='''\
Qemu binaries with labels and options, see below
"ENV format" section''',
action=ExtendAction)
p.add_argument('--dir', nargs='+', help='''\
Directories, each containing "test-source" and/or
"test-target" files, raw images to used in
benchmarking. File path with label, like
label:/path/to/directory''',
action=ExtendAction)
p.add_argument('--nbd', help='''\
host:port for remote NBD image, (or just host, for
default port 10809). Use it in tests, label is "nbd"
(but you cannot create test nbd:nbd).''')
p.add_argument('--test', nargs='+', help='''\
Tests, in form source-dir-label:target-dir-label''',
action=ExtendAction)
p.add_argument('--compressed', help='''\
Use compressed backup. It automatically means
automatically creating qcow2 target with
lazy_refcounts for each test run''', action='store_true')
p.add_argument('--qcow2-sources', help='''\
Use test-source.qcow2 images as sources instead of
test-source raw images''', action='store_true')
p.add_argument('--target-cache', help='''\
Setup cache for target nodes. Options:
direct: default, use O_DIRECT and aio=native
cached: use system cache (Qemu default) and aio=threads (Qemu default)
both: generate two test cases for each src:dst pair''',
default='direct', choices=('direct', 'cached', 'both'))
p.add_argument('--count', type=int, default=3, help='''\
Number of test runs per table cell''')
# BooleanOptionalAction helps to support --no-initial-run option
p.add_argument('--initial-run', action=argparse.BooleanOptionalAction,
help='''\
Do additional initial run per cell which doesn't count in result,
default true''')
p.add_argument('--drop-caches', action='store_true', help='''\
Do "sync; echo 3 > /proc/sys/vm/drop_caches" before each test run''')
bench(p.parse_args())
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