[VTune]Even when the same logic is executed in the same environment, it sometimes becomes very slow.

Software Tuning, Performance Optimization & Platform Monitoring

Discussion regarding monitoring and software tuning methodologies, Performance Monitoring Unit (PMU) of Intel microprocessors, and platform updating.

[VTune]Even when the same logic is executed in the same environment, it sometimes becomes very slow.

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[Environment]

OS: Ubuntu 22.04

CPU: 13th Gen Intel(R) Core(TM) i5-13600K (Single Thread)

When profiling our server program, we observed that the first request was normal, but the second request slowed down by more than 10 times. We wondered if E-Core was the problem, so we set E-Core to 0 in Bios, but it happened almost all the time. (Every time we run a function, we load and run the shared library, so the 'Call Stack' is separate, but we run the same function.
The memory used in the “shared library” is allocated and handed over by the host.)

I would like to know under what figures such as 'CPI Rate', 'Front-End Bound'(When the front-end bound is high, the back-end bound is low. e.g: 77% -> 44%), and 'Machine clears' increase.

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