def test_encoded_size_is_within_expected_limit(self) -> None:
state = _RendezvousState()
state.round = 1
state.complete = True
state.deadline = datetime.utcnow()
state.closed = True
# fmt: off
expected_max_sizes = (
( 5, 2 * (2 ** 10),), # 10 machines <= 2KB # noqa: E201, E241, E262
( 50, 16 * (2 ** 10),), # 100 machines <= 16KB # noqa: E201, E241, E262
( 500, 160 * (2 ** 10),), # 1000 machines <= 160KB # noqa: E201, E241, E262
(5000, 1600 * (2 ** 10),), # 10000 machines <= 1.6MB # noqa: E201, E241, E262
)
# fmt: on
for num_nodes, max_byte_size in expected_max_sizes:
with self.subTest(num_nodes=num_nodes, max_byte_size=max_byte_size):
for i in range(num_nodes):
node_running = _NodeDesc(f"dummy{i}.dummy1-dummy1-dummy1-dummy1.com", 12345, i)
node_waiting = _NodeDesc(f"dummy{i}.dummy2-dummy2-dummy2-dummy2.com", 67890, i)
state.participants[node_running] = i
state.wait_list.add(node_waiting)
state.last_heartbeats[node_running] = datetime.utcnow()
state.last_heartbeats[node_waiting] = datetime.utcnow()
bits = pickle.dumps(state)
base64_bits = b64encode(bits)
self.assertLessEqual(len(base64_bits), max_byte_size)
def setUp(self) -> None:
self._node = _NodeDesc("this_node", 1, 1)
self._min_nodes = 1
self._max_nodes = 2
self._keep_alive_interval = timedelta(seconds=30)
self._state = _RendezvousState()
self._state.participants[_NodeDesc("dummy1", 1, 1)] = 1
self._now = datetime(2000, 1, 1, hour=0, minute=0)
self._deadline = 10
self._datetime_patch = patch(
"torch.distributed.elastic.rendezvous.dynamic_rendezvous.datetime")
mock_datetime = self._datetime_patch.start()
mock_datetime.utcnow.return_value = self._now
self._time_patch = patch(
"torch.distributed.elastic.rendezvous.dynamic_rendezvous.time")
mock_time = self._time_patch.start()
mock_time.monotonic.return_value = self._deadline
def test_sync_sanitizes_state(self) -> None:
expected_state = self._create_state()
state = copy.deepcopy(expected_state)
dead_node1 = _NodeDesc("dead1", 1, 1)
dead_node2 = _NodeDesc("dead2", 1, 1)
dead_node3 = _NodeDesc("dead3", 1, 1)
dead_node4 = _NodeDesc("dead4", 1, 1)
dead_node5 = _NodeDesc("dead5", 1, 1)
state.last_heartbeats[dead_node1] = self._now - timedelta(seconds=91)
state.last_heartbeats[dead_node2] = self._now - timedelta(seconds=100)
state.last_heartbeats[dead_node3] = self._now - timedelta(seconds=110)
state.last_heartbeats[dead_node4] = self._now - timedelta(seconds=120)
state.last_heartbeats[dead_node5] = self._now - timedelta(seconds=130)
state.participants[dead_node1] = 0
state.participants[dead_node2] = 0
state.participants[dead_node3] = 0
state.wait_list.add(dead_node4)
state.wait_list.add(dead_node5)
self._backend.set_state_internal(state)
state_holder = self._create_state_holder()
state_holder.sync()
self.assert_state_equal(state_holder.state, expected_state)
def test_hash(self) -> None:
desc1 = _NodeDesc("dummy_fqdn", 2, 4)
desc2 = _NodeDesc("dummy_fqdn", 3, 5)
descs = {desc1, desc2}
self.assertIn(desc1, descs)
self.assertIn(desc2, descs)
def test_num_nodes_waiting_returns_expected_value(self) -> None:
self._state.wait_list.add(_NodeDesc("dummy1", 1, 1))
self._state.wait_list.add(_NodeDesc("dummy2", 1, 1))
handler = self._create_handler()
self.assertEqual(handler.num_nodes_waiting(), 2)
self._mock_sync.assert_called_once()
def _add_participants(
self, num_participants: int, state: _RendezvousState, ranked: bool = False
) -> None:
for i in range(num_participants):
if ranked:
node = _NodeDesc(f"dummy{i}", 1, 1)
rank = i
else:
node = _NodeDesc(f"dummy{num_participants - i - 1}", 1, 1) # Add in reverse.
rank = 0
state.participants[node] = rank
state.last_heartbeats[node] = self._now
def setUp(self) -> None:
self._node = _NodeDesc("this_node", 1, 1)
self._state_holder = FakeRendezvousStateHolder()
mock_sync = MagicMock(wraps=self._state_holder.sync)
mock_mark = MagicMock(wraps=self._state_holder.mark_dirty)
self._mock_state_holder = Mock()
self._mock_state_holder.sync = mock_sync
self._mock_state_holder.mark = mock_mark
setattr(self._state_holder, "sync", mock_sync) # noqa: B010
setattr(self._state_holder, "mark_dirty", mock_mark) # noqa: B010
self._state = self._state_holder.state
self._min_nodes = 1
self._max_nodes = 1
self._timeout = RendezvousTimeout()
self._now = datetime(2000, 1, 1, hour=0, minute=0)
self._datetime_patch = patch(
"torch.distributed.elastic.rendezvous.dynamic_rendezvous.datetime")
mock_datetime = self._datetime_patch.start()
mock_datetime.utcnow.return_value = self._now
def setUp(self) -> None:
self._node = _NodeDesc("this_node", 1, 1)
self._min_nodes = 1
self._max_nodes = 1
self._join_timeout: Optional[timedelta] = None
self._close_timeout: Optional[timedelta] = None
self._heartbeat_timeout: Optional[timedelta] = None
self._keep_alive_interval = timedelta(seconds=30)
self._store = DummyStore()
self._mock_store_get = MagicMock(return_value=b"dummy_value")
setattr(self._store, "get", self._mock_store_get) # noqa: B010
self._state_holder = FakeRendezvousStateHolder()
self._mock_sync = MagicMock(wraps=self._state_holder.sync)
setattr(self._state_holder, "sync", self._mock_sync) # noqa: B010
self._state = self._state_holder.state
def test_next_rendezvous_returns_expected_value(self) -> None:
self._state.participants[_NodeDesc("dummy1", 1, 1)] = 0
self._state.participants[_NodeDesc("dummy2", 1, 1)] = 0
self._max_nodes = 3
handler = self._create_handler()
store, rank, world_size = handler.next_rendezvous()
self.assertEqual(rank, 2)
self.assertEqual(world_size, 3)
_ = store.get("dummy_key")
self._mock_store_get.assert_called_once_with("torch.rendezvous.dummy_run_id.0/dummy_key")
def _create_state(self) -> _RendezvousState:
state = _RendezvousState()
state.round = 999
state.complete = True
state.deadline = self._now
state.closed = True
state.participants = {
_NodeDesc("dummy1", 1, 1): 0,
_NodeDesc("dummy2", 1, 1): 1,
_NodeDesc("dummy3", 1, 1): 2,
}
state.wait_list = {
_NodeDesc("dummy4", 1, 1),
_NodeDesc("dummy5", 1, 1),
}
state.last_heartbeats = {
_NodeDesc("dummy1", 1, 1): self._now,
_NodeDesc("dummy2", 1, 1): self._now - timedelta(seconds=15),
_NodeDesc("dummy3", 1, 1): self._now - timedelta(seconds=30),
_NodeDesc("dummy4", 1, 1): self._now - timedelta(seconds=60),
_NodeDesc("dummy5", 1, 1): self._now - timedelta(seconds=90),
}
return state
def test_keep_alive_thread_is_started_with_next_rendezvous_and_stopped_with_finalizer(
self, ) -> None:
self._node = _NodeDesc("this_node", 1, 3)
name = "RendezvousKeepAliveTimer_3"
handler = self._create_handler()
self.assertTrue(all(t.name != name for t in threading.enumerate()))
handler.next_rendezvous()
self.assertTrue(any(t.name == name for t in threading.enumerate()))
del handler
self.assertTrue(all(t.name != name for t in threading.enumerate()))
def test_repr(self) -> None:
desc = _NodeDesc("dummy_fqdn", 3, 5)
self.assertEqual(repr(desc), "dummy_fqdn_3_5")
