def test_integration(self):
env = catch.Catch()
action_spec = env.action_spec()
num_actions = action_spec.num_values
obs_spec = env.observation_spec()
agent = agent_lib.Agent(
num_actions=num_actions,
obs_spec=obs_spec,
net_factory=haiku_nets.CatchNet,
)
unroll_length = 20
learner = learner_lib.Learner(
agent=agent,
rng_key=jax.random.PRNGKey(42),
opt=optix.sgd(1e-2),
batch_size=1,
discount_factor=0.99,
frames_per_iter=unroll_length,
)
actor = actor_lib.Actor(
agent=agent,
env=env,
unroll_length=unroll_length,
)
frame_count, params = learner.params_for_actor()
act_out = actor.unroll_and_push(frame_count=frame_count, params=params)
learner.enqueue_traj(act_out)
learner.run(max_iterations=1)
def test_encode_weights(self):
env = catch.Catch()
action_spec = env.action_spec()
num_actions = action_spec.num_values
obs_spec = env.observation_spec()
agent = agent_lib.Agent(
num_actions=num_actions,
obs_spec=obs_spec,
net_factory=haiku_nets.CatchNet,
)
unroll_length = 20
learner = learner_lib.Learner(
agent=agent,
rng_key=jax.random.PRNGKey(42),
opt=optix.sgd(1e-2),
batch_size=1,
discount_factor=0.99,
frames_per_iter=unroll_length,
)
actor = actor_lib.Actor(
agent=agent,
env=env,
unroll_length=unroll_length,
)
frame_count, params = learner.params_for_actor()
proto_weight = util.proto3_weight_encoder(frame_count, params)
decoded_frame_count, decoded_params = \
util.proto3_weight_decoder(proto_weight)
self.assertEqual(frame_count, decoded_frame_count)
np.testing.assert_almost_equal(decoded_params["catch_net/linear"]["w"],
params["catch_net/linear"]["w"])
act_out = actor.unroll_and_push(frame_count, params)
def test_optimize(lr, w, x):
net = hk.without_apply_rng(
hk.transform(lambda x: hk.Linear(
1, with_bias=False, w_init=hk.initializers.Constant(w))(x)))
params = net.init(next(hk.PRNGSequence(0)), jnp.zeros((1, 1)))
opt_init, opt = optix.sgd(lr)
opt_state = opt_init(params)
def _loss(params, x):
return net.apply(params, x).mean(), None
opt_state, params, loss, _ = optimize(_loss,
opt,
opt_state,
params,
None,
x=jnp.ones((1, 1)) * x)
assert np.isclose(loss, w * x)
assert np.isclose(params["linear"]["w"], w - lr * x)
def test_sgd(self):
# experimental/optimizers.py
jax_params = self.init_params
opt_init, opt_update, get_params = optimizers.sgd(LR)
state = opt_init(jax_params)
for i in range(STEPS):
state = opt_update(i, self.per_step_updates, state)
jax_params = get_params(state)
# experimental/optix.py
optix_params = self.init_params
sgd = optix.sgd(LR, 0.0)
state = sgd.init(optix_params)
for _ in range(STEPS):
updates, state = sgd.update(self.per_step_updates, state)
optix_params = optix.apply_updates(optix_params, updates)
# Check equivalence.
for x, y in zip(tree_leaves(jax_params), tree_leaves(optix_params)):
np.testing.assert_allclose(x, y, rtol=1e-5)
def test_apply_every(self):
# The frequency of the application of sgd
k = 4
zero_update = (jnp.array([0., 0.]), jnp.array([0., 0.]))
# experimental/optix.py sgd
optix_sgd_params = self.init_params
sgd = optix.sgd(LR, 0.0)
state_sgd = sgd.init(optix_sgd_params)
# experimental/optix.py sgd apply every
optix_sgd_apply_every_params = self.init_params
sgd_apply_every = optix.chain(optix.apply_every(k=k),
optix.trace(decay=0, nesterov=False),
optix.scale(-LR))
state_sgd_apply_every = sgd_apply_every.init(
optix_sgd_apply_every_params)
for i in range(STEPS):
# Apply a step of sgd
updates_sgd, state_sgd = sgd.update(self.per_step_updates,
state_sgd)
optix_sgd_params = optix.apply_updates(optix_sgd_params,
updates_sgd)
# Apply a step of sgd_apply_every
updates_sgd_apply_every, state_sgd_apply_every = sgd_apply_every.update(
self.per_step_updates, state_sgd_apply_every)
optix_sgd_apply_every_params = optix.apply_updates(
optix_sgd_apply_every_params, updates_sgd_apply_every)
if i % k == k - 1:
# Check equivalence.
for x, y in zip(tree_leaves(optix_sgd_apply_every_params),
tree_leaves(optix_sgd_params)):
np.testing.assert_allclose(x, y, atol=1e-6, rtol=100)
else:
# Check updaue is zero.
for x, y in zip(tree_leaves(updates_sgd_apply_every),
tree_leaves(zero_update)):
np.testing.assert_allclose(x, y, atol=1e-10, rtol=1e-5)
# images=train_images,
# labels=train_labels,
tasks=tasks,
num_tasks=num_tasks_per_step,
num_samples=num_inner_samples,
shuffle=True,
)
outer_loop_sampler = partial(
random_samples,
# images=flatten(train_images, 1),
# labels=flatten(train_labels, 1),
num_samples=num_outer_samples,
)
inner_opt = optix.chain(optix.sgd(args.inner_lr))
inner_loop_fn = make_inner_loop_fn(loss_acc_fn, inner_opt.update)
outer_loop_loss_fn = make_outer_loop_loss_fn(loss_acc_fn, inner_opt.init,
inner_loop_fn)
rng, rng_net = split(rng)
(out_shape), params = net_init(rng_net, (-1, size, size, 1))
rln_params, pln_params = (
params[:args.num_rln_layers],
params[args.num_rln_layers:],
)
outer_opt_init, outer_opt_update, outer_get_params = optimizers.adam(
step_size=args.outer_lr)
outer_opt_state = outer_opt_init((rln_params, pln_params))
