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fix(kv-router): stamp request identity on decode-affinity scoring row #12955

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Merged
nv-yna merged 1 commit into from
Aug 10, 2026
Merged

fix(kv-router): stamp request identity on decode-affinity scoring row #12955

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5 changes: 5 additions & 0 deletions lib/kv-router/src/scheduling/selector/default.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -266,7 +266,12 @@ impl<C: Borrow<KvRouterConfig>> DefaultWorkerScorer<C> {
let overlap_adjusted_decode_blocks =
(decode_cost_blocks - overlap_credit_blocks).max(0.0);
let logit = overlap_adjusted_decode_blocks + active_request_cost_blocks;
// Stamped for the same reason as the two rows below: this row is emitted from the
// `SchedulerQueueActor` task, so the logging layer cannot attach request identity to
// it, and this branch returns early without reaching them.
tracing::debug!(
request_id = context.request_id,
worker_type = self.worker_type,
"{formula_name} for worker_id={} dp_rank={:?} with {effective_overlap_blocks:.2} effective cached blocks: {logit:.3} \
= max(0, decode_blocks - overlap_credit_blocks) + active_request_cost_blocks \
= max(0, {decode_cost_blocks:.3} - {overlap_credit_blocks:.3}) + {active_request_cost_blocks:.3}",
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