[KV-Offloading] : Expose CPU cache usage metric #45737
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Signed-off-by: Varun Sundar Rabindranath <varun-sundar-rabindranath@h100-01.nemg-001.lab.rdu2.dc.redhat.com>
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Purpose
Add
vllm:kv_offload_cpu_cache_usage_percmetric to export CPU cache usage percent. The naming and the semantics is designed to match the gpu counter partvllm:kv_cache_usage_percThis PR also refactors the
build_metric_definitionsfunction to move it into the OffloadingManager.Test Plan
Add unit tests
Test Result
Unit tests pass