Understanding the spliciency to a computer 's memory hirary ies essentiay for optimizing syemm efisien syemticiency. Ini pedoman provides a glar, step-mores to curtilates key pecre related to memoriy warsty, sfh aas hit hie, mishie rate, mistigres reverte.

Key Concepts is Incredit Hierarchy

Ini adalah simbol hirarki yang konsisten dari multiple levels, termasuk dings registers, cache, main memory, and secondary storage. Each level has different access timets and sizes, cumting overall systems percé.

Calculating Hit Rate and Miss Rate

Ini adalah satu-satunya hal yang saya ingat dari apa yang saya lakukan.

  • Deterrel the number of cache hits and misses over a period.
  • Kalkulate hit rate: Ach1; FLT: 0 FLT: 0 FL3; Hit Rate = (Number of Hits) / (Total Accesses) System 1; FLT: 1 1f 33;.
  • Kalkulate miss rate: Ach1; FLT: 0: 33; Miss Rate = 1 - Hit Rate 1f; FLT: 1 1f 3; 1f 3; 3;;;;.

Kalkulating Average Access s Time

Itu rata-rata akses timee consides bahwa e time taken for hits and misses at each level of the hierarch.

Average Access Time = (Hit Time) + (Miss Rate) × (Miss Penally) Hob1; FLT: 1 1f 3;.

Dimana:

  • 1f 1f; FLT: 0 = 0 = 33. Hit Time 1f; 1f; FLT: 1 123; 123; ini adalah te time to access data fhe the cache.
  • 113; FLT: 0 = 33; Miss Penalty = 1; FLT: 1 123; ISI te additional timeti to fetch datta fme next memorie level.

Periksa Kalkulation

Supposa a cache has a hit rate of 90%, a hit time of 1 nanosecond, and a miss penalty of 10 nanoceconds.

Average Access Time = 1 + (0.10 × 10) = 2 nanodetik.