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Allow flan-t5 models in ParlAI with fp16 improvment #4875

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Nov 11, 2022
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16 changes: 14 additions & 2 deletions parlai/agents/hugging_face/t5.py
Original file line number Diff line number Diff line change
Expand Up @@ -41,8 +41,9 @@ def check_hf_version(v: Tuple[int, int]) -> bool:
def build_t5(opt: Opt) -> T5ForConditionalGeneration:
if not check_hf_version(HF_VERSION):
raise RuntimeError('Must use transformers package >= 4.3 to use t5')
torch_dtype = torch.float16 if opt['fp16'] else torch.float32
return T5ForConditionalGeneration.from_pretrained(
opt['t5_model_arch'], dropout_rate=opt['t5_dropout']
opt['t5_model_arch'], dropout_rate=opt['t5_dropout'], torch_dtype=torch_dtype
)


Expand Down Expand Up @@ -86,7 +87,18 @@ def add_cmdline_args(
'--t5-model-arch',
type=str,
default='t5-base',
choices=["t5-small", "t5-base", "t5-large", "t5-3b", "t5-11b"],
choices=[
"t5-small",
"t5-base",
"t5-large",
"t5-3b",
"t5-11b",
"google/flan-t5-small",
"google/flan-t5-base",
"google/flan-t5-large",
"google/flan-t5-xl",
"google/flan-t5-xxl",
],
)
group.add_argument(
'--t5-model-parallel',
Expand Down