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33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
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SHORT Branch prediction miss rate/ratio
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EVENTSET
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FIXC1 ACTUAL_CPU_CLOCK
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FIXC2 MAX_CPU_CLOCK
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PMC0 RETIRED_INSTRUCTIONS
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PMC1 CPU_CLOCKS_UNHALTED
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PMC2 RETIRED_BRANCH_INSTR
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PMC3 RETIRED_MISP_BRANCH_INSTR
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METRICS
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Runtime (RDTSC) [s] time
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Runtime unhalted [s] FIXC1*inverseClock
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Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock
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CPI PMC1/PMC0
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Branch rate PMC2/PMC0
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Branch misprediction rate PMC3/PMC0
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Branch misprediction ratio PMC3/PMC2
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Instructions per branch PMC0/PMC2
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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_MISP_BRANCH_INSTR/RETIRED_INSTRUCTIONS
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Branch misprediction ratio = RETIRED_MISP_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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