novadbtest.py

#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4

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import os
import sys
import time

os.environ['EVENTLET_NO_GREENDNS'] = 'yes'
import eventlet
eventlet.monkey_patch(os=False)

from oslo.config import cfg

from nova.openstack.common import gettextutils
gettextutils.install('novadbtest')

from nova import context
from nova import config
from nova import db
from nova.openstack.common import jsonutils
from nova.openstack.common import log as logging


CONF = cfg.CONF
CONF.import_opt('connection',
                'nova.openstack.common.db.sqlalchemy.session', group='database')
LOG = logging.getLogger(__name__)

cli_opts = [
    cfg.IntOpt('total',
               default=100,
               help='number of runs'),
]
CONF.register_cli_opts(cli_opts)


def timing(f):
    def wrap(*args):
        time1 = time.time()
        ret = f(*args)
        time2 = time.time()
        return (ret, time2-time1)
    return wrap


@timing
def do_get_compute_node():
    ctx = context.get_admin_context()
    compute_nodes = db.compute_node_get_all(ctx)
    for node in compute_nodes:
        node['cpu_info'] = jsonutils.loads(node['cpu_info'])
        if hasattr(node, 'metrics'):
            node['metrics'] = jsonutils.loads(node['metrics'] or jsonutils.dumps(''))

    return {'num_comp': len(compute_nodes),
            'num_stat': len(compute_nodes[0]['cpu_info']),
            'join_stats': len(compute_nodes[0].get('stats', [])) > 0
           }


def test_main(results,total):
    i = 0
    total_elapse = 0
    info = {}
    while i<total:       
        (info, elapse_time) = do_get_compute_node()
        i += 1
        print "Finish round %d in  %f seconds (num of nodes: %d, num of stats: %d, join_stats: %s)" % (i, elapse_time,
               info['num_comp'], info['num_stat'], info['join_stats'])
        total_elapse += elapse_time
        #time.sleep(0.5)
        eventlet.sleep(0.5)

    return (info, total_elapse)

def main():
    config.parse_args(sys.argv,['novadbtest.conf'])
    logging.setup("novadbtest")
    results = {'total_time': 0.0,
               'rounds': 0
               }
    #test_main(False, 'JOINLOAD', results)
    (info, total_time) = test_main(results, CONF.total)
    print '============Summary============'
    print 'total run:  %d' % CONF.total
    print '# num_comp: %d' % info.get('num_comp', 0)
    print '# num_stat: %d' % info.get('num_stat', 0)
    print '# join_stats: %s' % info.get('join_stats', False)
    print '==============================='
    print 'Average time of compute_node_get_all(): %f seconds' % (total_time / CONF.total)


if __name__ == '__main__':
    main()