SHORT Miss ratio for VPU data reads

EVENTSET
PMC0  VPU_DATA_READ
PMC1  VPU_DATA_READ_MISS

METRICS
Runtime (RDTSC) [s] time
VPU read miss ratio PMC1/PMC0

LONG
Formula:
VPU read miss ratio = PMC1/PMC0
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This performance group determines the ratio between reads and reads that miss
the cache and are issued by the VPU.
