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

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ggerganov merged 2 commits into from
Jun 4, 2026
Merged

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

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server: avoid unnecessary checkpoint restore when new tokens are present
Abioy Jun 4, 2026
24632d5
cont : add ref
ggerganov Jun 4, 2026
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3 changes: 2 additions & 1 deletion tools/server/server-context.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2781,9 +2781,10 @@ struct server_context_impl {
}

llama_pos pos_next = slot.prompt.tokens.pos_next(n_past);
const bool has_new_tokens = (n_past < slot.task->n_tokens());
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ggerganov marked this conversation as resolved.

// the largest pos_min required for a checkpoint to be useful
const auto pos_min_thold = std::max(0, pos_next - n_swa - 1);
const auto pos_min_thold = std::max(0, pos_next - n_swa - (has_new_tokens ? 0 : 1));

if (n_past > 0 && n_past <= slot.prompt.n_tokens()) {
const auto pos_min = llama_memory_seq_pos_min(llama_get_memory(ctx_tgt), slot.id);
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