scripts/simplebench/bench_block_job.py

   1 #!/usr/bin/env python3
   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
  22 import sys
  23 import os
  24 import socket
  25 import json
  26
  27 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
  28 from qemu.machine import QEMUMachine
  29 from qemu.qmp import QMPConnectError
  30
  31
  32 def 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
  81 def 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
  96 def drv_file(filename):
  97     return {'driver': 'file', 'filename': filename,
  98             'cache': {'direct': True}, 'aio': 'native'}
  99
 100
 101 def drv_nbd(host, port):
 102     return {'driver': 'nbd',
 103             'server': {'type': 'inet', 'host': host, 'port': port}}
 104
 105
 106 if __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)