Read the TSC register with the x86_64 RDTSCP instruction to benchmark the execution of a function in CPU clock cycles granularity from both kernel and user space. LFENCE is used to avoid other instructions being executed before the reading is complete.
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Measure CPU clock cycles spent executing a function using the x86_64 RDTSCP instruction, from both kernel and user space
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tnrdd/cycles_count
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Measure CPU clock cycles spent executing a function using the x86_64 RDTSCP instruction, from both kernel and user space
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