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import multiprocessing as mp
import ctypes
from time import sleep, time
from typing import Any, Dict, List
import pytest
from ding.framework.supervisor import RecvPayload, SendPayload, Supervisor, ChildType
class MockEnv():
def __init__(self, _) -> None:
self._counter = 0
def step(self, _):
self._counter += 1
return self._counter
@property
def action_space(self):
return 3
def block(self):
sleep(10)
def block_reset(self):
sleep(10)
def sleep1(self):
sleep(1)
@pytest.mark.tmp
@pytest.mark.parametrize("type_", [ChildType.PROCESS, ChildType.THREAD])
def test_supervisor(type_):
sv = Supervisor(type_=type_)
for _ in range(3):
sv.register(lambda: MockEnv("AnyArgs"))
sv.start_link()
for env_id in range(len(sv._children)):
sv.send(SendPayload(proc_id=env_id, method="step", args=["any action"]))
recv_states: List[RecvPayload] = []
for _ in range(3):
recv_states.append(sv.recv())
assert sum([payload.proc_id for payload in recv_states]) == 3
assert all([payload.data == 1 for payload in recv_states])
# Test recv_all
send_payloads = []
for env_id in range(len(sv._children)):
payload = SendPayload(
proc_id=env_id,
method="step",
args=["any action"],
)
send_payloads.append(payload)
sv.send(payload)
req_ids = [payload.req_id for payload in send_payloads]
# Only wait for last two messages, keep the first one in the queue.
recv_payloads = sv.recv_all(send_payloads[1:])
assert len(recv_payloads) == 2
for req_id, payload in zip(req_ids[1:], recv_payloads):
assert req_id == payload.req_id
recv_payload = sv.recv()
assert recv_payload.req_id == req_ids[0]
assert len(sv.action_space) == 3
assert all(a == 3 for a in sv.action_space)
sv.shutdown()
@pytest.mark.tmp
def test_supervisor_spawn():
sv = Supervisor(type_=ChildType.PROCESS, mp_ctx=mp.get_context("spawn"))
for _ in range(3):
sv.register(MockEnv("AnyArgs"))
sv.start_link()
for env_id in range(len(sv._children)):
sv.send(SendPayload(proc_id=env_id, method="step", args=["any action"]))
recv_states: List[RecvPayload] = []
for _ in range(3):
recv_states.append(sv.recv())
assert sum([payload.proc_id for payload in recv_states]) == 3
assert all([payload.data == 1 for payload in recv_states])
sv.shutdown()
class MockCrashEnv(MockEnv):
def step(self, _):
super().step(_)
if self._counter == 2:
raise Exception("Ohh")
return self._counter
@pytest.mark.tmp
@pytest.mark.parametrize("type_", [ChildType.PROCESS, ChildType.THREAD])
def test_crash_supervisor(type_):
sv = Supervisor(type_=type_)
for _ in range(2):
sv.register(lambda: MockEnv("AnyArgs"))
sv.register(lambda: MockCrashEnv("AnyArgs"))
sv.start_link()
# Send 6 messages, will cause the third subprocess crash
for env_id in range(len(sv._children)):
for _ in range(2):
sv.send(SendPayload(proc_id=env_id, method="step", args=["any action"]))
# Find the error mesasge
recv_states: List[RecvPayload] = []
for _ in range(6):
recv_payload = sv.recv(ignore_err=True)
if recv_payload.err:
sv._children[recv_payload.proc_id].restart()
recv_states.append(recv_payload)
assert any([isinstance(payload.err, Exception) for payload in recv_states])
# Resume
for env_id in range(len(sv._children)):
sv.send(SendPayload(proc_id=env_id, method="step", args=["any action"]))
recv_states: List[RecvPayload] = []
for _ in range(3):
recv_states.append(sv.recv())
# 3 + 3 + 1
assert sum([p.data for p in recv_states]) == 7
with pytest.raises(Exception):
sv.send(SendPayload(proc_id=2, method="step", args=["any action"]))
sv.recv(ignore_err=False)
sv.shutdown()
@pytest.mark.tmp
@pytest.mark.parametrize("type_", [ChildType.PROCESS, ChildType.THREAD])
def test_recv_all(type_):
sv = Supervisor(type_=type_)
for _ in range(3):
sv.register(lambda: MockEnv("AnyArgs"))
sv.start_link()
# Test recv_all
send_payloads = []
for env_id in range(len(sv._children)):
payload = SendPayload(
proc_id=env_id,
method="step",
args=["any action"],
)
send_payloads.append(payload)
sv.send(payload)
retry_times = {env_id: 0 for env_id in range(len(sv._children))}
def recv_callback(recv_payload: RecvPayload, remain_payloads: Dict[str, SendPayload]):
if retry_times[recv_payload.proc_id] == 2:
return
retry_times[recv_payload.proc_id] += 1
payload = SendPayload(proc_id=recv_payload.proc_id, method="step", args={"action"})
sv.send(payload)
remain_payloads[payload.req_id] = payload
recv_payloads = sv.recv_all(send_payloads=send_payloads, callback=recv_callback)
assert len(recv_payloads) == 3
assert all([v == 2 for v in retry_times.values()])
sv.shutdown()
@pytest.mark.timeout(60)
@pytest.mark.parametrize("type_", [ChildType.PROCESS, ChildType.THREAD])
def test_timeout(type_):
sv = Supervisor(type_=type_)
for _ in range(3):
sv.register(lambda: MockEnv("AnyArgs"))
sv.start_link()
send_payloads = []
for env_id in range(len(sv._children)):
payload = SendPayload(proc_id=env_id, method="block")
send_payloads.append(payload)
sv.send(payload)
# Test timeout exception
with pytest.raises(TimeoutError):
sv.recv_all(send_payloads=send_payloads, timeout=1)
sv.shutdown(timeout=1)
# Test timeout with ignore error
sv.start_link()
send_payloads = []
# 0 is block
payload = SendPayload(proc_id=0, method="block")
send_payloads.append(payload)
sv.send(payload)
# 1 is step
payload = SendPayload(proc_id=1, method="step", args=[""])
send_payloads.append(payload)
sv.send(payload)
payloads = sv.recv_all(send_payloads=send_payloads, timeout=1, ignore_err=True)
assert isinstance(payloads[0].err, TimeoutError)
assert payloads[1].err is None
sv.shutdown(timeout=1)
@pytest.mark.timeout(60)
@pytest.mark.parametrize("type_", [ChildType.PROCESS, ChildType.THREAD])
def test_timeout_with_callback(type_):
sv = Supervisor(type_=type_)
for _ in range(3):
sv.register(lambda: MockEnv("AnyArgs"))
sv.start_link()
send_payloads = []
# 0 is block
payload = SendPayload(proc_id=0, method="block")
send_payloads.append(payload)
sv.send(payload)
# 1 is step
payload = SendPayload(proc_id=1, method="step", args=[""])
send_payloads.append(payload)
sv.send(payload)
block_reset_callback = False
# 1. Add another send payload in the callback
# 2. Recv this send payload and check for the method
def recv_callback(recv_payload: RecvPayload, remain_payloads: Dict[str, SendPayload]):
if recv_payload.method == "block" and recv_payload.err:
new_send_payload = SendPayload(proc_id=recv_payload.proc_id, method="block_reset")
remain_payloads[new_send_payload.req_id] = new_send_payload
return
if recv_payload.method == "block_reset" and recv_payload.err:
nonlocal block_reset_callback
block_reset_callback = True
return
payloads = sv.recv_all(send_payloads=send_payloads, timeout=1, ignore_err=True, callback=recv_callback)
assert block_reset_callback
assert isinstance(payloads[0].err, TimeoutError)
assert payloads[1].err is None
sv.shutdown(timeout=1)
@pytest.mark.tmp # gitlab ci and local test pass, github always fail
def test_shared_memory():
sv = Supervisor(type_=ChildType.PROCESS)
def shm_callback(payload: RecvPayload, shm: Any):
shm[payload.proc_id] = payload.req_id
payload.data = 0
shm = mp.Array(ctypes.c_uint8, 3)
for i in range(3):
sv.register(lambda: MockEnv("AnyArgs"), shm_buffer=shm, shm_callback=shm_callback)
sv.start_link()
# Send init request
for env_id in range(len(sv._children)):
sv.send(SendPayload(proc_id=env_id, req_id=env_id, method="sleep1", args=[]))
start = time()
for i in range(6):
payload = sv.recv()
assert payload.data == 0
assert shm[payload.proc_id] == payload.req_id
sv.send(SendPayload(proc_id=payload.proc_id, req_id=i, method="sleep1", args=[]))
# Non blocking
assert time() - start < 3
sv.shutdown()
@pytest.mark.benchmark
@pytest.mark.parametrize("type_", [ChildType.PROCESS, ChildType.THREAD])
def test_supervisor_benchmark(type_):
sv = Supervisor(type_=type_)
for _ in range(3):
sv.register(lambda: MockEnv("AnyArgs"))
sv.start_link()
for env_id in range(len(sv._children)):
sv.send(SendPayload(proc_id=env_id, method="step", args=[""]))
start = time()
for _ in range(1000):
payload = sv.recv()
sv.send(SendPayload(proc_id=payload.proc_id, method="step", args=[""]))
assert time() - start < 1
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