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fix(server): fix escape characters in stop sequence (#155)

This commit is contained in:
OlivierDehaene 2023-04-05 19:37:41 +02:00 committed by GitHub
parent 9122e7bd9c
commit 3f2542bb6a
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4 changed files with 90 additions and 69 deletions
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9
server/tests/utils/test_tokens.py
View File

@ -14,6 +14,15 @@ def test_stop_sequence_criteria():
assert not criteria("/test; ")
def test_stop_sequence_criteria_escape():
criteria = StopSequenceCriteria("<|stop|>")
assert not criteria("<")
assert not criteria("<|stop")
assert criteria("<|stop|>")
assert not criteria("<|stop|> ")
def test_stopping_criteria():
criteria = StoppingCriteria(0, [StopSequenceCriteria("/test;")], max_new_tokens=5)
assert criteria(65827, "/test") == (False, None)

28
server/text_generation_server/models/custom_modeling/flash_santacoder_modeling.py
View File

@ -162,15 +162,17 @@ class FlashMQAttention(torch.nn.Module):
class MLP(nn.Module):
def __init__(
self, act, hidden_size, intermediate_size, process_group=None
):
def __init__(self, act, hidden_size, intermediate_size, process_group=None):
super().__init__()
self.act = (
ACT2FN[act]
if "gelu" not in act
else lambda x: torch.nn.functional.gelu(x, approximate="tanh" if act in ["gelu_fast",
"gelu_pytorch_tanh"] else None)
else lambda x: torch.nn.functional.gelu(
x,
approximate="tanh"
if act in ["gelu_fast", "gelu_pytorch_tanh"]
else None,
)
)
if process_group is None:
@ -232,9 +234,7 @@ class Block(nn.Module):
cu_seqlens_q,
)
hidden_states, residual = self.ln_2(
hidden_states, residual
)
hidden_states, residual = self.ln_2(hidden_states, residual)
mlp_output = self.mlp(hidden_states)
@ -258,16 +258,16 @@ class FlashSantacoderModel(nn.Module):
config.num_attention_heads,
config.activation_function,
config.hidden_size,
config.n_inner if config.n_inner is not None else 4 * config.hidden_size,
config.n_inner
if config.n_inner is not None
else 4 * config.hidden_size,
config.layer_norm_epsilon,
process_group,
)
for _ in range(config.num_hidden_layers)
]
)
self.ln_f = FastLayerNorm(
config.hidden_size, eps=config.layer_norm_epsilon
)
self.ln_f = FastLayerNorm(config.hidden_size, eps=config.layer_norm_epsilon)
self.head_size = self.h[0].attn.head_size
self.num_heads = self.h[0].attn.num_heads
@ -335,9 +335,7 @@ class FlashSantacoderForCausalLM(nn.Module):
self.transformer = FlashSantacoderModel(config, process_group)
self.lm_head = FastLinear(
config.hidden_size, config.vocab_size, bias=False
)
self.lm_head = FastLinear(config.hidden_size, config.vocab_size, bias=False)
def post_load_weights(self):
self.transformer.post_load_weights()

29
server/text_generation_server/models/flash_santacoder.py
View File

@ -9,7 +9,7 @@ from typing import Optional, List
from text_generation_server.models import FlashCausalLM
from text_generation_server.models.custom_modeling.flash_santacoder_modeling import (
FlashSantacoderForCausalLM
FlashSantacoderForCausalLM,
)
from text_generation_server.utils import (
weight_files,
@ -37,8 +37,9 @@ class FlashSantacoder(FlashCausalLM):
)
config = AutoConfig.from_pretrained(
model_id, revision=revision,
trust_remote_code=True # Needed as the config is not part of Transformers
model_id,
revision=revision,
trust_remote_code=True, # Needed as the config is not part of Transformers
)
# We do not use from_pretrained as we modified the model internal module layout
@ -91,7 +92,12 @@ class FlashSantacoder(FlashCausalLM):
current_parameter_tensor = None
if current_parameter_tensor is not None:
if "c_fc.weight" in key or "c_proj.weight" in key or "q_attn.weight" in key or "kv_attn.weight" in key:
if (
"c_fc.weight" in key
or "c_proj.weight" in key
or "q_attn.weight" in key
or "kv_attn.weight" in key
):
# Tranpose as we use nn.Linear instead of Conv1D
value = value.T
@ -99,11 +105,18 @@ class FlashSantacoder(FlashCausalLM):
# Init qkv
if "attn.weight" in final_key:
module._parameters[param_name] = value.new_empty(
(model.transformer.head_size * (model.transformer.num_heads + 2), value.shape[1])
(
model.transformer.head_size
* (model.transformer.num_heads + 2),
value.shape[1],
)
)
elif "attn.bias" in final_key:
module._parameters[param_name] = value.new_empty(
(model.transformer.head_size * (model.transformer.num_heads + 2))
(
model.transformer.head_size
* (model.transformer.num_heads + 2)
)
)
# Copy to correct slice
@ -113,11 +126,11 @@ class FlashSantacoder(FlashCausalLM):
module._parameters[param_name][: value.shape[0]] = value
elif "kv_attn.weight" in key:
module._parameters[param_name][
model.transformer.head_size * model.transformer.num_heads:
model.transformer.head_size * model.transformer.num_heads :
] = value
elif "kv_attn.bias" in key:
module._parameters[param_name][
model.transformer.head_size * model.transformer.num_heads:
model.transformer.head_size * model.transformer.num_heads :
] = value
else:
if current_parameter_tensor.shape != value.shape:

1
server/text_generation_server/utils/tokens.py
View File

@ -110,6 +110,7 @@ class NextTokenChooser:
class StopSequenceCriteria:
def __init__(self, stop_sequence: str):
stop_sequence = re.escape(stop_sequence)
self.regex = re.compile(f".*{stop_sequence}$")
def __call__(self, output: str) -> bool: