cc-metric-collector/collectors/likwid/groups/phi/VECTOR2.txt
2021-03-25 14:47:10 +01:00

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SHORT Vector unit usage
EVENTSET
PMC0 VPU_INSTRUCTIONS_EXECUTED
PMC1 VPU_STALL_REG
METRICS
Runtime (RDTSC) [s] time
Runtime unhalted [s] PMC1*inverseClock
VPU stall ratio [%] 100*(VPU_STALL_REG/PMC0)
LONG
Formulas:
VPU stall ratio [%] = 100*(VPU_STALL_REG/VPU_INSTRUCTIONS_EXECUTED)
--
This group measures how efficient the processor works with
regard to vectorization instruction throughput. The event VPU_STALL_REG counts
the VPU stalls due to data dependencies. Dependencies are read-after-write,
write-after-write and write-after-read.