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SQLProcessUtilization counter above 100%

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Does anyone know why/when this counter exceeds 100%?It is obtained from sys.dm_os_ring_buffers DMV. normally it matches external CPU Utilization from resource manager but I have a workload where it goes to 190% (roughly double of actual 80% host utilization)I believe this is occurring when thread pooling kicks in, i.e. workload exceeded max_worker_thread limit.Physical host with NO Hyper-threading or Virtualization. Plain cores.Thanks!

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