def test_only_shared_cores_have_decreased(self):
workload_id_0 = "w0"
workload_id_1 = "w1"
# Share two cores on the current cpu
cur_cpu = get_cpu()
# Core 0 is shared by w0 and w1
cur_cpu.get_packages()[0].get_cores()[0].get_threads()[0].claim(workload_id_0)
cur_cpu.get_packages()[0].get_cores()[0].get_threads()[1].claim(workload_id_1)
# Core 1 is shared by w0 and w1
cur_cpu.get_packages()[0].get_cores()[1].get_threads()[0].claim(workload_id_0)
cur_cpu.get_packages()[0].get_cores()[1].get_threads()[1].claim(workload_id_1)
# Share zero cores on the new cpu
new_cpu = get_cpu()
# Core 0 is wholly consumed by w0
new_cpu.get_packages()[0].get_cores()[0].get_threads()[0].claim(workload_id_0)
new_cpu.get_packages()[0].get_cores()[0].get_threads()[1].claim(workload_id_0)
# Core 1 is wholly consumed by w1
new_cpu.get_packages()[0].get_cores()[1].get_threads()[0].claim(workload_id_1)
new_cpu.get_packages()[0].get_cores()[1].get_threads()[1].claim(workload_id_1)
self.assertTrue(has_better_isolation(cur_cpu, new_cpu))
def test_cross_package_violations_have_decreased(self):
workload_id_0 = "w0"
workload_id_1 = "w1"
# Put 2 cross package violation on the current cpu
cur_cpu = get_cpu()
# W0 is on the first threads of package 0 and 1
cur_cpu.get_packages()[0].get_threads()[0].claim(workload_id_0)
cur_cpu.get_packages()[1].get_threads()[0].claim(workload_id_0)
# W1 is on the second threads of package 0 and 1
cur_cpu.get_packages()[0].get_threads()[1].claim(workload_id_1)
cur_cpu.get_packages()[1].get_threads()[1].claim(workload_id_1)
# Put 1 cross package violation on the new cpu
new_cpu = get_cpu()
# W0 is on the first threads of package 0 and 1 (unchanged)
new_cpu.get_packages()[0].get_threads()[0].claim(workload_id_0)
new_cpu.get_packages()[1].get_threads()[0].claim(workload_id_0)
# W1 is on the second and third threads of package 0 (better)
new_cpu.get_packages()[0].get_threads()[1].claim(workload_id_1)
new_cpu.get_packages()[0].get_threads()[2].claim(workload_id_1)
self.assertTrue(has_better_isolation(cur_cpu, new_cpu))
def test_no_change_populated_cpu(self):
w0 = Workload(uuid.uuid4(), 4, STATIC)
cur_cpu = get_cpu()
new_cpu = get_cpu()
allocator0 = GreedyCpuAllocator(cur_cpu)
allocator0.assign_threads(w0)
allocator1 = GreedyCpuAllocator(new_cpu)
allocator1.assign_threads(w0)
self.assertFalse(has_better_isolation(cur_cpu, new_cpu))
def test_no_change_populated_cpu(self):
w0 = get_test_workload(uuid.uuid4(), 4, STATIC)
cur_cpu = get_cpu()
new_cpu = get_cpu()
allocator0 = GreedyCpuAllocator()
request = AllocateThreadsRequest(cur_cpu, w0.get_id(), {w0.get_id(): w0}, {}, DEFAULT_TEST_REQUEST_METADATA)
cur_cpu = allocator0.assign_threads(request).get_cpu()
allocator1 = GreedyCpuAllocator()
request = AllocateThreadsRequest(new_cpu, w0.get_id(), {w0.get_id(): w0}, {}, DEFAULT_TEST_REQUEST_METADATA)
new_cpu = allocator1.assign_threads(request).get_cpu()
self.assertFalse(has_better_isolation(cur_cpu, new_cpu))
def test_no_change_populated_cpu(self):
w0 = get_test_workload(uuid.uuid4(), 4, STATIC)
cur_cpu = get_cpu()
new_cpu = get_cpu()
allocator0 = GreedyCpuAllocator()
request = get_no_usage_threads_request(cur_cpu, [w0])
cur_cpu = allocator0.assign_threads(request).get_cpu()
allocator1 = GreedyCpuAllocator()
request = get_no_usage_threads_request(new_cpu, [w0])
new_cpu = allocator1.assign_threads(request).get_cpu()
self.assertFalse(has_better_isolation(cur_cpu, new_cpu))
def test_no_change_empty_cpu(self):
cpu = get_cpu()
self.assertFalse(has_better_isolation(cpu, cpu))
