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Update gemma.py

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This commit is contained in:
Daniel Han-Chen 2024-02-25 04:14:38 +11:00
commit 9d648cbccf
1 changed files with 2 additions and 5 deletions
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unsloth/models/gemma.py
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@ -98,8 +98,8 @@ class FastGemmaRotaryEmbedding(torch.nn.Module):
if length > self.max_seq_len_cached:
self._set_cos_sin_cache(seq_len=length, device=x.device, dtype=x.dtype)
old_cos = self.cos_cached[:,:seq_len].to(dtype=x.dtype)
old_sin = self.sin_cached[:,:seq_len].to(dtype=x.dtype)
old_cos = self.cos_cached[:,:length].to(dtype=x.dtype)
old_sin = self.sin_cached[:,:length].to(dtype=x.dtype)
# x: [bs, num_attention_heads, seq_len, head_size]
if self.inv_freq is None:
@ -111,14 +111,11 @@ class FastGemmaRotaryEmbedding(torch.nn.Module):
t = torch.arange(self.max_position_embeddings, device="cpu", dtype=torch.int64).float().to("cuda").unsqueeze(0)
inv_freq_expanded = self.inv_freq[None, :, None].float().expand(1, -1, 1).to("cuda")
position_ids_expanded = t[:, None, :].float()
print(position_ids_expanded.shape, position_ids_expanded.to(torch.float64))
print(inv_freq_expanded.shape, inv_freq_expanded.to(torch.float64))
freqs = (inv_freq_expanded @ position_ids_expanded).transpose(1, 2)
print(freqs.to(torch.int64))
emb = torch.cat((freqs, freqs), dim=-1)
seq_len = position_ids.shape[1]
print(position_ids.shape)
new_cos = emb.cos().to(dtype=x.dtype)[:,:seq_len]
new_sin = emb.sin().to(dtype=x.dtype)[:,:seq_len]