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Fix unbound axis error in tpu_mtj_backend.py when `numseqs > 1`

This commit is contained in:
Gnome Ann 2021-11-30 14:06:46 -05:00
parent 3c349e6aaf
commit c1e7c1643f
1 changed files with 27 additions and 19 deletions
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46
tpu_mtj_backend.py
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@ -155,26 +155,30 @@ class PenalizingCausalTransformer(CausalTransformer):
def __init__(self, config):
# Initialize
super().__init__(config)
def generate(state, key, ctx, ctx_length, gen_length, sampler_options, soft_embeddings=None):
def generate(state, key, ctx, ctx_length, gen_length, numseqs_aux, sampler_options, soft_embeddings=None):
numseqs = numseqs_aux.shape[0]
# These are the tokens that we don't want the AI to ever write
self.badwords = jnp.array([6880, 50256, 42496, 4613, 17414, 22039, 16410, 27, 29, 38430, 37922, 15913, 24618, 28725, 58, 47175, 36937, 26700, 12878, 16471, 37981, 5218, 29795, 13412, 45160, 3693, 49778, 4211, 20598, 36475, 33409, 44167, 32406, 29847, 29342, 42669, 685, 25787, 7359, 3784, 5320, 33994, 33490, 34516, 43734, 17635, 24293, 9959, 23785, 21737, 28401, 18161, 26358, 32509, 1279, 38155, 18189, 26894, 6927, 14610, 23834, 11037, 14631, 26933, 46904, 22330, 25915, 47934, 38214, 1875, 14692, 41832, 13163, 25970, 29565, 44926, 19841, 37250, 49029, 9609, 44438, 16791, 17816, 30109, 41888, 47527, 42924, 23984, 49074, 33717, 31161, 49082, 30138, 31175, 12240, 14804, 7131, 26076, 33250, 3556, 38381, 36338, 32756, 46581, 17912, 49146])
def generate_sample(context, ctx_length):
# Give the initial context to the transformer
transformer = CausalTransformerShard(config)
_, initial_state = transformer.generate_initial(context, ctx_length, soft_embeddings=soft_embeddings)
# The "generated" array will contain the tokens from the
# context as well as the tokens picked by the sampler at
# each stage, padded with a bunch of 50256s, so we know
# which tokens have to be repetition penalized
generated = jnp.pad(context, (0, config["seq"]), constant_values=pad_token_id) # Let it start off with just the 2048 context tokens, plus some 50256s which will be eventually filled with sampler-chosen tokens
generated_index = config["seq"]
# Add that information to generate_loop_fn's starting state
initial_state = (generated, generated_index) + initial_state
initial_states = []
for sequence_index in range(numseqs):
_, initial_state = transformer.generate_initial(context, ctx_length, soft_embeddings=soft_embeddings)
# The "generated" array will contain the tokens from the
# context as well as the tokens picked by the sampler at
# each stage, padded with a bunch of 50256s, so we know
# which tokens have to be repetition penalized
generated = jnp.pad(context, (0, config["seq"]), constant_values=pad_token_id) # Let it start off with just the 2048 context tokens, plus some 50256s which will be eventually filled with sampler-chosen tokens
generated_index = config["seq"]
# Add that information to generate_loop_fn's starting state
initial_state = (generated, generated_index, sequence_index) + initial_state
initial_states.append(initial_state)
# Get repetition penalty from the arguments
repetition_penalty = sampler_options.pop('repetition_penalty', None)
def generate_loop_fn(carry):
# Unpack current generate_loop_fn state
generated, generated_index, next_token, decode_state, sample_key = carry
generated, generated_index, sequence_index, next_token, decode_state, sample_key = carry[0]
# Get the pseudo-random number generator key that will
# be used by kobold_sample to randomly pick a token
sample_key, new_key = jax.random.split(sample_key)
@ -216,12 +220,13 @@ class PenalizingCausalTransformer(CausalTransformer):
generated_index += 1
# Re-pack the current generate_loop_fn's state so we can
# get back the same variables the next time
new_carry = (generated, generated_index, next_token, new_state, new_key)
return new_carry
carry[0] = (generated, generated_index, sequence_index, next_token, new_state, new_key)
carry.append(carry.pop(0))
return carry
final_state = jax.lax.while_loop(
lambda carry: carry[1] - config["seq"] < gen_length,
lambda carry: carry[0][1] - config["seq"] < gen_length,
generate_loop_fn,
initial_state,
initial_states,
)
return final_state
generate_fn = hk.transform(generate_sample).apply
@ -235,12 +240,13 @@ class PenalizingCausalTransformer(CausalTransformer):
["batch", ...],
["batch", ...],
["batch", ...],
["batch", ...],
["shard", ...],
),
out_axes=["shard", "batch", ...],
axis_resources={'shard': 'mp', 'batch': 'dp'},
)
def generate(self, ctx, ctx_length, gen_length, sampler_options, return_logits=False, soft_embeddings=None):
def generate(self, ctx, ctx_length, gen_length, numseqs, sampler_options, return_logits=False, soft_embeddings=None):
assert not return_logits
key = hk.PRNGSequence(random.randint(0, 2 ** 60))
batch_size = ctx.shape[0]
@ -251,6 +257,7 @@ class PenalizingCausalTransformer(CausalTransformer):
ctx,
np.array(ctx_length, dtype=np.uint32),
np.array(gen_length, dtype=np.uint32),
np.empty((batch_size, numseqs), dtype=np.uint8),
sampler_options,
soft_embeddings,
)
@ -269,7 +276,7 @@ def infer(
soft_tokens: Optional[np.array] = None,
) -> List[str]:
maps.thread_resources.env = thread_resources_env
total_batch = numseqs
total_batch = 1
tokens = np.uint32(tokenizer.encode(context, max_length=params["seq"] - (soft_tokens.shape[0] if soft_tokens is not None else 0), truncation=True))
if(soft_tokens is not None):
tokens = np.uint32(np.concatenate((soft_tokens, tokens)))
@ -289,11 +296,12 @@ def infer(
batched_tokens,
np.ones(total_batch, dtype=np.uint32) * provided_ctx,
np.ones(total_batch, dtype=np.uint32) * gen_len,
numseqs,
batched_generator_params,
soft_embeddings=soft_embeddings,
)
for o in output[0][0, :, params["seq"] : params["seq"] + gen_len]:
samples.append(tokenizer.decode(o))
for o in output:
samples.append(tokenizer.decode(o[0][0, 0, params["seq"] : params["seq"] + gen_len]))
return samples