b9509

server: avoid unnecessary checkpoint restore when new tokens are present (#24110)

• server: avoid unnecessary checkpoint restore when new tokens are present

The pos_min_thold calculation unconditionally subtracts 1 to ensure at
least one token is evaluated for logits when no new tokens exist.
However, when the request contains new tokens beyond the cached prefix,
this -1 is overly conservative and may trigger an unnecessary checkpoint
restore.

Conditionally apply the -1 only when n_past >= task.n_tokens() (no new
tokens), avoiding redundant KV state restoration when there is actual
work to do.

• cont : add ref

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Co-authored-by: Georgi Gerganov [email protected]

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• macOS Apple Silicon (arm64, KleidiAI enabled) DISABLED
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Linux:

• Ubuntu x64 (CPU)
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UI:

• UI