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32 lines
1.0 KiB
Plaintext
32 lines
1.0 KiB
Plaintext
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SHORT Branch prediction miss rate/ratio
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EVENTSET
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FIXC0 INSTR_RETIRED_ANY
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FIXC1 CPU_CLK_UNHALTED_CORE
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FIXC2 CPU_CLK_UNHALTED_REF
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PMC0 BR_INST_RETIRED_ALL_BRANCHES
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PMC1 BR_MISP_RETIRED_ALL_BRANCHES
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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 FIXC1/FIXC0
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Branch rate PMC0/FIXC0
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Branch misprediction rate PMC1/FIXC0
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Branch misprediction ratio PMC1/PMC0
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Instructions per branch FIXC0/PMC0
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LONG
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Formulas:
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Branch rate = BR_INST_RETIRED_ALL_BRANCHES/INSTR_RETIRED_ANY
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Branch misprediction rate = BR_MISP_RETIRED_ALL_BRANCHES/INSTR_RETIRED_ANY
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Branch misprediction ratio = BR_MISP_RETIRED_ALL_BRANCHES/BR_INST_RETIRED_ALL_BRANCHES
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Instructions per branch = INSTR_RETIRED_ANY/BR_INST_RETIRED_ALL_BRANCHES
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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 ration of all branch instruction where mispredicted.
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Instructions per branch is 1/branch rate.
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