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fix multinomial gpu cpu sync

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OlivierDehaene 2023-05-10 17:54:04 +02:00
parent 1df2aa03c5
commit 3248fdfbd4
1 changed files with 5 additions and 2 deletions
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7
server/text_generation_server/utils/tokens.py
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@ -25,8 +25,11 @@ class Sampling:
def __call__(self, logits):
probs = torch.nn.functional.softmax(logits, -1)
next_tokens = torch.multinomial(probs, num_samples=1, generator=self.generator)
return next_tokens
# See: https://github.com/pytorch/pytorch/blob/925a3788ec5c06db62ca732a0e9425a26a00916f/aten/src/ATen/native/Distributions.cpp#L631-L637
q = torch.empty_like(probs).exponential_(1, generator=self.generator)
torch.div(probs, q, out=q)
return torch.argmax(q, dim=-1, keepdim=True)
class Greedy: