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Fix incorrect cache allocation with multi-query #2203

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Jul 8, 2024
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Fix incorrect cache allocation with multi-query #2203

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7 changes: 6 additions & 1 deletion server/text_generation_server/models/flash_causal_lm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -912,7 +912,12 @@ def __init__(
break
if num_kv_heads is None:
raise ValueError("Cannot get the number of key/value heads")
self.num_kv_heads = num_kv_heads // self.process_group.size()
self.num_kv_heads = (
num_kv_heads // self.process_group.size()
if num_kv_heads > 1
else num_kv_heads
)
assert self.num_kv_heads > 0
self.head_size = config.hidden_size // config.num_attention_heads

self.cuda_graphs = {}
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