Question

Whats the difference between cache memory L1 and cache memory L2 ?

Answer 1

types, Generally Memories are page 1. Temporary Memory permanent Memory. * CPU when it needs instuctions or data, it Searches in memory. Search starts at cache memory. process * This cache memory stores recently needed instructions needed by cpu. Cache is fastest memory and is implemen- ted by SRAM * SRAM is the fastest RAM. * We also have DRAM which is slower and permanent (ROM) is slowest Memory memory. * SRAM (or) cache is further classified into three types. memory. 2) L2 cache memory 35 L3 cache mory memory. 1. LI cache

memory (1) 21 cache page- * It is the fastest cache memory among all three (L1, L2 & L3). * It is the first mem memory that is accessed by cpu. This is better understood by. when CPU needs instruction or data, it searches L1 cache first . Hence, it is fastest me- mory if cache hit occurs. * It's Size ranges from, 2ks to 64KB * It presents inside cou. So, it wosks with speed of cpu- (2) L2 cache Memory : * It is slower than 4 and faster than L3 * It may sometimes present inside cpu (or) outside CPU. If it is present outside CPU, it is connected with Very high speed BUS. * so it is slower than 22. from, 256 KB to 512kB. * It's size ranges

page 3 * If cache miss occurs in hi cache, then CPU searches in L2 cache. * If cache miss occurs in L2 Cache also then cpu searches in L3 Cache. L2 cache CPU Li cache L3 cache RAM ROM * Above diagram shows order of memory access by CPU. * If CPU needs instructions (or) data it first goes to L, if it does not find it then goes to L2 and so on up to ROM.