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Two counters, counter1 and counter2, as well as two functions, increment1() and increment2(), are defined in the code. These functions increment the values of the corresponding counters. The programme compares the runtimes of both scenarios after performing the increment functions on a single thread and on multiple threads for a predetermined number of iterations.
In order to guarantee alignment with the cache line size, the Counter struct is defined with alignas(CACHE_LINE_SIZE). Since the value member is an atomic long long, concurrent access to the counter is permitted without risk. The remaining bytes are taken up by the padding member, which makes sure the struct is aligned to the cache line size.
== Sources ==
