def test_get_samples(self):
next_value = iter((
virt_inspector.CPUL3CacheUsageStats(l3_cache_usage=90112),
virt_inspector.CPUL3CacheUsageStats(l3_cache_usage=180224),
))
def inspect_cpu_l3_cache(name):
return next(next_value)
self.inspector.inspect_cpu_l3_cache = (mock.Mock(
side_effect=inspect_cpu_l3_cache))
mgr = manager.AgentManager(0, self.CONF)
pollster = cpu.CPUL3CachePollster(self.CONF)
def _verify_cpu_l3_cache_metering(expected_usage):
cache = {}
samples = list(pollster.get_samples(mgr, cache, [self.instance]))
self.assertEqual(1, len(samples))
self.assertEqual(set(['cpu_l3_cache']),
set([s.name for s in samples]))
self.assertEqual(expected_usage, samples[0].volume)
_verify_cpu_l3_cache_metering(90112)
_verify_cpu_l3_cache_metering(180224)
def inspect_cpu_l3_cache(self, instance):
domain = self._lookup_by_uuid(instance)
try:
stats = self.connection.domainListGetStats(
[domain], libvirt.VIR_DOMAIN_STATS_PERF)
perf = stats[0][1]
usage = perf["perf.cmt"]
return virt_inspector.CPUL3CacheUsageStats(l3_cache_usage=usage)
except (KeyError, AttributeError) as e:
# NOTE(sileht): KeyError if for libvirt >=2.0.0,<2.3.0, the perf
# subsystem ws existing but not these attributes
# https://github.com/libvirt/libvirt/commit/bae660869de0612bee2a740083fb494c27e3f80c
msg = _('Perf is not supported by current version of libvirt, and '
'failed to inspect l3 cache usage of %(instance_uuid)s, '
'can not get info from libvirt: %(error)s') % {
'instance_uuid': instance.id,
'error': e
}
raise virt_inspector.NoDataException(msg)
# domainListGetStats might launch an exception if the method or
# cmt perf event is not supported by the underlying hypervisor
# being used by libvirt.
except libvirt.libvirtError as e:
msg = _('Failed to inspect l3 cache usage of %(instance_uuid)s, '
'can not get info from libvirt: %(error)s') % {
'instance_uuid': instance.id,
'error': e
}
raise virt_inspector.NoDataException(msg)
def inspect_cpu_l3_cache(self, instance):
domain = self._lookup_by_uuid(instance)
try:
stats = self.connection.domainListGetStats(
[domain], libvirt.VIR_DOMAIN_STATS_PERF)
perf = stats[0][1]
usage = perf["perf.cmt"]
return virt_inspector.CPUL3CacheUsageStats(l3_cache_usage=usage)
except AttributeError as e:
msg = _('Perf is not supported by current version of libvirt, and '
'failed to inspect l3 cache usage of %(instance_uuid)s, '
'can not get info from libvirt: %(error)s') % {
'instance_uuid': instance.id,
'error': e
}
raise virt_inspector.NoDataException(msg)
# domainListGetStats might launch an exception if the method or
# cmt perf event is not supported by the underlying hypervisor
# being used by libvirt.
except libvirt.libvirtError as e:
msg = _('Failed to inspect l3 cache usage of %(instance_uuid)s, '
'can not get info from libvirt: %(error)s') % {
'instance_uuid': instance.id,
'error': e
}
raise virt_inspector.NoDataException(msg)