def stat_vm_info_from_libvirt(self):
"""
Get instance statistic info from libvirtd then calculate
performance info by passed time.
"""
current_time = timeutils.utcnow()
vm_stats = self.libvirt_manager.get_all_doms_stats()
inst_stats = vm_stats.copy()
#NOTE
for inst_name in vm_stats.keys():
inst_stat = vm_stats[inst_name]
inst_last_stat = self.last_inst_stat[inst_name]
collect_inst = inst_stats[inst_name]
#NIC IO rate
for nic in inst_stat['nic_stats'].keys():
nic_stat = inst_stat['nic_stats'][nic]
last_nic_stat = inst_last_stat['nic_stats'][nic]
collect_inst['nic_stats'][nic]['rx_bytes_rate'] = \
utils.io_bytes_rate(last_nic_stat['rx_bytes'],
nic_stat['rx_bytes'],
self.last_stat_time, current_time)
collect_inst['nic_stats'][nic]['tx_bytes_rate'] = \
utils.io_bytes_rate(last_nic_stat['tx_bytes'],
nic_stat['tx_bytes'],
self.last_stat_time, current_time)
#DISK IO rate
for disk in inst_stat['disk_stats'].keys():
disk_stat = inst_stat['disk_stats'][disk]
last_disk_stat = inst_last_stat['disk_stats'][disk]
collect_inst['disk_stats'][disk]['wr_bytes_rate'] = \
utils.io_bytes_rate(last_disk_stat['wr_bytes'],
disk_stat['wr_bytes'],
self.last_stat_time, current_time)
collect_inst['disk_stats'][disk]['rd_bytes_rate'] = \
utils.io_bytes_rate(last_disk_stat['rd_bytes'],
disk_stat['rd_bytes'],
self.last_stat_time, current_time)
#CPU percent
last_cputime = inst_last_stat['overview']['cputime']
cputime = inst_stat['overview']['cputime']
ncpus = inst_stat['overview']['ncpus']
collect_inst['overview']['cpu_percent'] = \
utils.cpu_percent(last_cputime, cputime, self.last_stat_time,
current_time, ncpus)
self.last_inst_stat = vm_stats
self.last_stat_time = current_time
return inst_stats
def _inner():
if initial_delay:
greenthread.sleep(initial_delay)
try:
while self._running:
start = timeutils.utcnow()
self.f(*self.args, **self.kw)
end = timeutils.utcnow()
if not self._running:
break
delay = interval - timeutils.delta_seconds(start, end)
if delay <= 0:
LOG.warn(_('task run outlasted interval by %s sec') %
-delay)
greenthread.sleep(delay if delay > 0 else 0)
except LoopingCallDone, e:
self.stop()
done.send(e.retvalue)