Уровень 0 · материалов: 2
В кластер входят документы об определении реальной емкости аппаратных буферов и таблиц, но не входят документы об общих принципах работы или изменении MAC-адресов.
Общие признаки: емкость аппаратных таблиц, эмпирическое тестирование производительности, ограничения архитектуры железа
Группа выше: Устройство передачи данных и её аппаратные ограничения
Смысл: The main idea is that manufacturer specifications for MAC table capacity in network switches can be misleading due to hash collisions and architectural limitations, necessitating independent empirical testing for network reliability.
An empirical test of four network switches reveals that actual MAC address table capacity often differs from manufacturer claims due to hash collisions.
Смысл: The main idea is to empirically determine the capacity and behavior of the Branch Target Buffer (BTB) across different CPU architectures to understand how many branches a program can have before performance degrades. It concludes that 'never-taken' branches are computationally cheap, but 'always-taken' branches and function calls are limited by a finite hardware buffer (4k entries on x86).
Experimental analysis shows that branch predictors on x86 CPUs have a ~4096 entry limit, whereas Apple M1's predictor is likely tied to its L1 cache size.