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27 lines
894 B
Plaintext
27 lines
894 B
Plaintext
SHORT Branch prediction miss rate/ratio
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EVENTSET
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PMC0 RETIRED_INSTRUCTIONS
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PMC1 RETIRED_BRANCH_INSTR
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PMC2 RETIRED_MISPREDICTED_BRANCH_INSTR
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METRICS
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Runtime (RDTSC) [s] time
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Branch rate PMC1/PMC0
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Branch misprediction rate PMC2/PMC0
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Branch misprediction ratio PMC2/PMC1
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Instructions per branch PMC0/PMC1
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LONG
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Formulas:
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Branch rate = RETIRED_BRANCH_INSTR/RETIRED_INSTRUCTIONS
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Branch misprediction rate = RETIRED_MISPREDICTED_BRANCH_INSTR/RETIRED_INSTRUCTIONS
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Branch misprediction ratio = RETIRED_MISPREDICTED_BRANCH_INSTR/RETIRED_BRANCH_INSTR
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Instructions per branch = RETIRED_INSTRUCTIONS/RETIRED_BRANCH_INSTR
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-
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The rates state how often on average a branch or a mispredicted branch occurred
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per instruction retired in total. The branch misprediction ratio sets directly
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into relation what ratio of all branch instruction where mispredicted.
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Instructions per branch is 1/branch rate.
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