DPCs Queued/sec is the average rate, in incidents per second, at which deferred procedure calls (DPCs) were added to the ...

DPCs Queued/sec is the average rate, in incidents per second, at which deferred procedure calls (DPCs) were added to the processor's DPC queue. DPCs are interrupts that run at a lower priority than standard interrupts.  Each processor has its own DPC queue. This counter measures the rate that DPCs are added to the queue, not the number of DPCs in the queue.  This counter displays the difference between the values observed in the last two samples, divided by the duration of the sample interval.