83 lines
3.5 KiB
Python
83 lines
3.5 KiB
Python
# Copyright (c) 2014 Cisco Systems, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Test case for solver scheduler RAM cost."""
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from nova import context
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from nova.openstack.common.fixture import mockpatch
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from nova.scheduler.solvers import costs
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from nova.scheduler.solvers.costs import ram_cost
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from nova import test
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from nova.tests.scheduler import solver_scheduler_fakes as fakes
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class TestRamCost(test.NoDBTestCase):
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def setUp(self):
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super(TestRamCost, self).setUp()
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self.context = context.RequestContext('fake_usr', 'fake_proj')
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self.useFixture(mockpatch.Patch('nova.db.compute_node_get_all',
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return_value=fakes.COMPUTE_NODES[0:5]))
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self.host_manager = fakes.FakeSolverSchedulerHostManager()
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self.cost_handler = costs.CostHandler()
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self.cost_classes = self.cost_handler.get_matching_classes(
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['nova.scheduler.solvers.costs.ram_cost.RamCost'])
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def _get_all_hosts(self):
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ctxt = context.get_admin_context()
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return self.host_manager.get_all_host_states(ctxt)
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def test_ram_cost_multiplier_1(self):
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self.flags(ram_cost_multiplier=0.5, group='solver_scheduler')
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self.assertEqual(0.5, ram_cost.RamCost().cost_multiplier())
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def test_ram_cost_multiplier_2(self):
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self.flags(ram_cost_multiplier=(-2), group='solver_scheduler')
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self.assertEqual((-2), ram_cost.RamCost().cost_multiplier())
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def test_get_extended_cost_matrix(self):
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# the host.free_ram_mb values of these fake hosts are supposed to be:
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# 512, 1024, 3072, 8192
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fake_hosts = self._get_all_hosts()
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# FIXME: ideally should mock get_hosts_stripping_forced_and_ignored()
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fake_hosts = list(fake_hosts)
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# the hosts order may be arbitrary, here we manually order them
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# which is for convenience of testings
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tmp = []
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for i in range(len(fake_hosts)):
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for fh in fake_hosts:
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if fh.host == 'host%s' % (i + 1):
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tmp.append(fh)
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fake_hosts = tmp
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fake_filter_properties = {
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'context': self.context.elevated(),
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'num_instances': 3,
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'instance_type': {'memory_mb': 1024},
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'instance_uuids': ['fake_uuid_%s' % x for x in range(3)]}
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fake_cost = self.cost_classes[0]()
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expected_x_cost_mat = [
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[0.0, 0.125, 0.25, 0.375],
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[-0.125, 0.0, 0.125, 0.25],
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[-0.375, -0.25, -0.125, -0.0],
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[-1.0, -0.875, -0.75, -0.625]]
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x_cost_mat = fake_cost.get_extended_cost_matrix(fake_hosts,
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fake_filter_properties)
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expected_x_cost_mat = [[round(val, 4) for val in row]
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for row in expected_x_cost_mat]
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x_cost_mat = [[round(val, 4) for val in row] for row in x_cost_mat]
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self.assertEqual(expected_x_cost_mat, x_cost_mat)
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