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27 lines
731 B
Plaintext
27 lines
731 B
Plaintext
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SHORT Cycles per instruction
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EVENTSET
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PMC0 INSTRUCTIONS_RETIRED
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PMC1 CPU_CLOCKS_UNHALTED
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PMC2 UOPS_RETIRED
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METRICS
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Runtime (RDTSC) [s] time
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Runtime unhalted [s] PMC1*inverseClock
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CPI PMC1/PMC0
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CPI (based on uops) PMC1/PMC2
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IPC PMC0/PMC1
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LONG
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Formulas:
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CPI = CPU_CLOCKS_UNHALTED/RETIRED_INSTRUCTIONS
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CPI (based on uops) = CPU_CLOCKS_UNHALTED/RETIRED_UOPS
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IPC = RETIRED_INSTRUCTIONS/CPU_CLOCKS_UNHALTED
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-
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This group measures how efficient the processor works with
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regard to instruction throughput. Also important as a standalone
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metric is INSTRUCTIONS_RETIRED as it tells you how many instruction
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you need to execute for a task. An optimization might show very
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low CPI values but execute many more instruction for it.
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