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Computer benchmark tool11/25/2023 in the page cache) when you would really use your program. In practice, it is very likely that some of the data is already "here" (e.g. In your case, I believe you want to consider the average time. Read also Operating Systems: three easy pieces for more about OSes. Hence the kernel scheduler is behaving differently from one run to the next (because of preemptive scheduling. and perhaps CPU frequency -limited when the chip is too hot- is changing without software control. Remember that your hardware is non-deterministic: CPU cache behavior, CPU pipelining, superscalar processors with out-of-order execution, external interrupts -timers, networks, USB, disk. Also "starting" or "cold-start" operation is not a typical running condition (but a special case), so you usually want to ignore it. Hence, you need to make several benchmarks. In general, you cannot benchmark any software in exactly the same conditions because computer (and their operating systems) are not entirely deterministic, so you won't be able to reproduce exactly some running conditions. You could choose the worst one (probably the first time), or you could consider an average of them, or ignore the worst and best runs and only care about the rest of them, etc. The next question is what timing is the most relevant. run five times exactly the same thing) the same "solution" and benchmark them all. Run the software inside a docker container, each time.Restart PC just to make the point that caching was the issue.Some way to integrate in the benchmark pipeline the additional tools. Optionally, I need programmable ways to achieve this. Please provide me some info as I am researching a lot and could not find any helpful resource. Then I can calculate the average speed of a, the average speed of b and finally compare the data. Run a.exe and measure time, clean all ram, cpu register anything cached about this data What is the best way to make this kind of tests ? I wonder if there is any way to do it without having to restore the PC? If I restart the PC and measure performance again, then the ram is empty from the previous data and results are quite ok. I want to run each test with a clean slate. ![]() I want to make the tests as more objective and reproducible as possible by removing these influences. If I run more then once the same solution, the execution time will be less and I understand that this happens because some of the data gets cached in the memory hierarchy (ram, or cpu registers etc). (with threads, go routines, MPI etc) and want to objectively compare them. I am measuring the execution time of each of my solutions. ![]() I am writing a software that splits big files into smaller files and I have coded several solutions.
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