How large is a cache line?

The block of memory that is transferred to a memory cache. The cache line is generally fixed in size, typically ranging from 16 to 256 bytes.

How many cache lines does the computer have and how many bits are required to access a cache line?

B. How many bits of the address are used to select which line of the cache is accessed? With 16 cache lines, 4 bits of the address are required to select which line of the cache is accessed.

How many lines of cache are there?

Common cache line sizes are 32, 64 and 128 bytes. A cache can only hold a limited number of lines, determined by the cache size. For example, a 64 kilobyte cache with 64-byte lines has 1024 cache lines.

What is cache line granularity?

Therefore, the cache line size is simply a granularity of the on-chip caches[1]. Quote from the link: In most modern systems, the memory subsystem is managed and accessed at multiple different granularities at various resources. The software stack typically accesses data at a word granularity (typically 4 or 8 bytes).

How many bits are in a cache line?

Since there are 16 bytes in a cache block, the OFFSET field must contain 4 bits (24 = 16). To determine the number of bits in the SET field, we need to determine the number of sets. Each set contains 2 cache blocks (2-way associative) so a set contains 32 bytes.

What is the biggest and slowest cache?

Now, the L3 cache in your CPU can be massive, with top-end consumer CPUs featuring L3 caches up to 32MB. Some server CPU L3 caches can exceed this, featuring up to 64MB. The L3 cache is the largest but also the slowest cache memory unit. Modern CPUs include the L3 cache on the CPU itself.

How many bytes is a cache line?

64 bytes
A cache line is the unit of data transfer between the cache and main memory. Typically the cache line is 64 bytes. The processor will read or write an entire cache line when any location in the 64 byte region is read or written.

How are cache lines calculated?

Each cache line/slot matches a memory block. That means each cache line contains 16 bytes. If the cache is 64Kbytes then 64Kbytes/16 = 4096 cache lines. To address these 4096 cache lines, we need 12 bits (212 = 4096).