Cache placement policies: Difference between revisions

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Revision as of 09:26, 14 May 2023

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==Performance==

[[CPU cache]] plays a significant role in the overall performance of a computer system and the speed at which a [[general processing unit]] (CPU) can process data. CPU cache is very fast [[computer memory]], usually using [[static random-access memory]] (SRAM). SRAM is [[volatile memory]], it can only store data when supplied with electricity. The CPU cache sits between the CPU core and the [[random-access memory]] (RAM), also known as main memory. The CPU cache isolates the super fast CPU cores from the much slower RAM, which is usually [[directdynamic random access memory]] (DRAM).<ref>{{Cite book|title= Fundamentals of Computer Organization and Design | author1= Sivarama P. Dandamudi |publisher= Springer New York |year=2006 |isbn= 9780387215662 | pages=731}}</ref>

Cache placement policies can enhance the performance of data processing by the CPU cores, because computer programs may access data in the RAM sequentially, also known as sequential execution or spatial locality behavior. Alternatively computer programs may execute a part of the code or data repeatedly for some time, also known as sequential code execution or [[Infinite loop|loop structure]].<ref>{{Cite book|title= Fundamentals of Computer Organization and Design | author1= Sivarama P. Dandamudi |publisher= Springer New York |year=2006 |isbn= 9780387215662 | pages=731}}</ref>