1 files changed, 159 insertions, 0 deletions
diff --git a/scripts/simplebench/bench_block_job.py b/scripts/simplebench/bench_block_job.py
new file mode 100755
index 000000000..a403c35b0
--- /dev/null
+++ b/scripts/simplebench/bench_block_job.py
@@ -0,0 +1,159 @@
+#!/usr/bin/env python3
+#
+# Benchmark block jobs
+#
+# Copyright (c) 2019 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 sys
+import os
+import subprocess
+import socket
+import json
+
+sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
+from qemu.machine import QEMUMachine
+from qemu.qmp import QMPConnectError
+from qemu.aqmp import ConnectError
+
+
+def bench_block_job(cmd, cmd_args, qemu_args):
+    """Benchmark block-job
+
+    cmd       -- qmp command to run block-job (like blockdev-backup)
+    cmd_args  -- dict of qmp command arguments
+    qemu_args -- list of Qemu command line arguments, including path to Qemu
+                 binary
+
+    Returns {'seconds': int} on success and {'error': str} on failure, dict may
+    contain addional 'vm-log' field. Return value is compatible with
+    simplebench lib.
+    """
+
+    vm = QEMUMachine(qemu_args[0], args=qemu_args[1:])
+
+    try:
+        vm.launch()
+    except OSError as e:
+        return {'error': 'popen failed: ' + str(e)}
+    except (QMPConnectError, ConnectError, socket.timeout):
+        return {'error': 'qemu failed: ' + str(vm.get_log())}
+
+    try:
+        res = vm.qmp(cmd, **cmd_args)
+        if res != {'return': {}}:
+            vm.shutdown()
+            return {'error': '"{}" command failed: {}'.format(cmd, str(res))}
+
+        e = vm.event_wait('JOB_STATUS_CHANGE')
+        assert e['data']['status'] == 'created'
+        start_ms = e['timestamp']['seconds'] * 1000000 + \
+            e['timestamp']['microseconds']
+
+        e = vm.events_wait((('BLOCK_JOB_READY', None),
+                            ('BLOCK_JOB_COMPLETED', None),
+                            ('BLOCK_JOB_FAILED', None)), timeout=True)
+        if e['event'] not in ('BLOCK_JOB_READY', 'BLOCK_JOB_COMPLETED'):
+            vm.shutdown()
+            return {'error': 'block-job failed: ' + str(e),
+                    'vm-log': vm.get_log()}
+        if 'error' in e['data']:
+            vm.shutdown()
+            return {'error': 'block-job failed: ' + e['data']['error'],
+                    'vm-log': vm.get_log()}
+        end_ms = e['timestamp']['seconds'] * 1000000 + \
+            e['timestamp']['microseconds']
+    finally:
+        vm.shutdown()
+
+    return {'seconds': (end_ms - start_ms) / 1000000.0}
+
+
+def get_image_size(path):
+    out = subprocess.run(['qemu-img', 'info', '--out=json', path],
+                         stdout=subprocess.PIPE, check=True).stdout
+    return json.loads(out)['virtual-size']
+
+
+def get_blockdev_size(obj):
+    img = obj['filename'] if 'filename' in obj else obj['file']['filename']
+    return get_image_size(img)
+
+
+# Bench backup or mirror
+def bench_block_copy(qemu_binary, cmd, cmd_options, source, target):
+    """Helper to run bench_block_job() for mirror or backup"""
+    assert cmd in ('blockdev-backup', 'blockdev-mirror')
+
+    if target['driver'] == 'qcow2':
+        try:
+            os.remove(target['file']['filename'])
+        except OSError:
+            pass
+
+        subprocess.run(['qemu-img', 'create', '-f', 'qcow2',
+                        target['file']['filename'],
+                        str(get_blockdev_size(source))],
+                       stdout=subprocess.DEVNULL,
+                       stderr=subprocess.DEVNULL, check=True)
+
+    source['node-name'] = 'source'
+    target['node-name'] = 'target'
+
+    cmd_options['job-id'] = 'job0'
+    cmd_options['device'] = 'source'
+    cmd_options['target'] = 'target'
+    cmd_options['sync'] = 'full'
+
+    return bench_block_job(cmd, cmd_options,
+                           [qemu_binary,
+                            '-blockdev', json.dumps(source),
+                            '-blockdev', json.dumps(target)])
+
+
+def drv_file(filename, o_direct=True):
+    node = {'driver': 'file', 'filename': filename}
+    if o_direct:
+        node['cache'] = {'direct': True}
+        node['aio'] = 'native'
+
+    return node
+
+
+def drv_nbd(host, port):
+    return {'driver': 'nbd',
+            'server': {'type': 'inet', 'host': host, 'port': port}}
+
+
+def drv_qcow2(file):
+    return {'driver': 'qcow2', 'file': file}
+
+
+if __name__ == '__main__':
+    import sys
+
+    if len(sys.argv) < 4:
+        print('USAGE: {} <qmp block-job command name> '
+              '<json string of arguments for the command> '
+              '<qemu binary path and arguments>'.format(sys.argv[0]))
+        exit(1)
+
+    res = bench_block_job(sys.argv[1], json.loads(sys.argv[2]), sys.argv[3:])
+    if 'seconds' in res:
+        print('{:.2f}'.format(res['seconds']))
+    else:
+        print(res)