Reducing cache miss penalty

A Cache Optimization .

Techniques:

1. Multilevel caches (Memory Hierarchy )
2. Critical word first
   • The requested word is sent first
   • The full cache line follows
   • good for long chace lines
3. Early restart
   • The full cache line is sent
   • The execution starts as soon as the requested word is transmitted
   • good for long chace lines
4. Read from write buffers
   • Reads that read addresses that have pending writes, already in the write buffer, they can just read from the buffer
5. Victim cache

   • reduce conflict misses

   • additional Fully assiciative cache

     -> When evicted from main cache, get stored in victim cache

     -> prevents scenario where two memory regions would kick each other out of the cache because they are mapped to same cache line