Add spec_verify_calls_total metric for speculative decoding#25689
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Add a new Prometheus counter `sglang:spec_verify_calls_total` that tracks the number of speculative decoding verification calls per request. The metric is incremented in `observe_one_finished_request` when `spec_verify_ct` is greater than zero. Co-authored-by: Lianmin Zheng <lianminzheng@gmail.com>
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Shunkangz
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May 27, 2026
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Summary
sglang:spec_verify_calls_totalthat tracks the number of speculative decoding verification calls per request.observe_one_finished_requestwhenspec_verify_ct > 0.spec_verify_ctfield is extracted from the recv object in tokenizer_manager, with safe fallback to 0 if unavailable.Original commits
318a5f14eTest plan
/metricsendpointCI States
Latest PR Test (Base): ❌ Run #26062371070⚠️ Not enabled -- add
Latest PR Test (Extra):
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