1#!/usr/bin/env python
2#
3# Benchmark block jobs
4#
5# Copyright (c) 2019 Virtuozzo International GmbH.
6#
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with this program.  If not, see <http://www.gnu.org/licenses/>.
19#
20
21
22import sys
23import os
24import socket
25import json
26
27sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
28from qemu.machine import QEMUMachine
29from qemu.qmp import QMPConnectError
30
31
32def bench_block_job(cmd, cmd_args, qemu_args):
33    """Benchmark block-job
34
35    cmd       -- qmp command to run block-job (like blockdev-backup)
36    cmd_args  -- dict of qmp command arguments
37    qemu_args -- list of Qemu command line arguments, including path to Qemu
38                 binary
39
40    Returns {'seconds': int} on success and {'error': str} on failure, dict may
41    contain addional 'vm-log' field. Return value is compatible with
42    simplebench lib.
43    """
44
45    vm = QEMUMachine(qemu_args[0], args=qemu_args[1:])
46
47    try:
48        vm.launch()
49    except OSError as e:
50        return {'error': 'popen failed: ' + str(e)}
51    except (QMPConnectError, socket.timeout):
52        return {'error': 'qemu failed: ' + str(vm.get_log())}
53
54    try:
55        res = vm.qmp(cmd, **cmd_args)
56        if res != {'return': {}}:
57            vm.shutdown()
58            return {'error': '"{}" command failed: {}'.format(cmd, str(res))}
59
60        e = vm.event_wait('JOB_STATUS_CHANGE')
61        assert e['data']['status'] == 'created'
62        start_ms = e['timestamp']['seconds'] * 1000000 + \
63            e['timestamp']['microseconds']
64
65        e = vm.events_wait((('BLOCK_JOB_READY', None),
66                            ('BLOCK_JOB_COMPLETED', None),
67                            ('BLOCK_JOB_FAILED', None)), timeout=True)
68        if e['event'] not in ('BLOCK_JOB_READY', 'BLOCK_JOB_COMPLETED'):
69            vm.shutdown()
70            return {'error': 'block-job failed: ' + str(e),
71                    'vm-log': vm.get_log()}
72        end_ms = e['timestamp']['seconds'] * 1000000 + \
73            e['timestamp']['microseconds']
74    finally:
75        vm.shutdown()
76
77    return {'seconds': (end_ms - start_ms) / 1000000.0}
78
79
80# Bench backup or mirror
81def bench_block_copy(qemu_binary, cmd, source, target):
82    """Helper to run bench_block_job() for mirror or backup"""
83    assert cmd in ('blockdev-backup', 'blockdev-mirror')
84
85    source['node-name'] = 'source'
86    target['node-name'] = 'target'
87
88    return bench_block_job(cmd,
89                           {'job-id': 'job0', 'device': 'source',
90                            'target': 'target', 'sync': 'full'},
91                           [qemu_binary,
92                            '-blockdev', json.dumps(source),
93                            '-blockdev', json.dumps(target)])
94
95
96def drv_file(filename):
97    return {'driver': 'file', 'filename': filename,
98            'cache': {'direct': True}, 'aio': 'native'}
99
100
101def drv_nbd(host, port):
102    return {'driver': 'nbd',
103            'server': {'type': 'inet', 'host': host, 'port': port}}
104
105
106if __name__ == '__main__':
107    import sys
108
109    if len(sys.argv) < 4:
110        print('USAGE: {} <qmp block-job command name> '
111              '<json string of arguments for the command> '
112              '<qemu binary path and arguments>'.format(sys.argv[0]))
113        exit(1)
114
115    res = bench_block_job(sys.argv[1], json.loads(sys.argv[2]), sys.argv[3:])
116    if 'seconds' in res:
117        print('{:.2f}'.format(res['seconds']))
118    else:
119        print(res)
120