What is it

Simulates behaviour of an L1 cache. Given a trace file of memory references(output by Valgrind) and a parametrization of cache organisation/architecture, outputs the number of hits, misses and evictions. Replacement policy for evictions is least recently used (LRU).

Asumptions

• 64 bit address
• every memory access propery aligned (no crossings of block bounds)

Usage

./cache_sim -s 2 -E 2 -b 4 -t traces/tracefile.trace

Example output to stdout: >hits: 12, misses: 2, evictions: 1

And to file .cache_output: 12 2 1

Options:

• h: display usage
• v: display result (hit/miss, eviction) for every reference
• s <num>: number of bits to determine set index
• E <num>: number of lines per set
• b <num>: number of bits available for data offset
• t <filename>: file containing memory traces (valgrind)

Constraints:

• $s \geq 1$
• $b \geq 1$
• $E \geq 1$
• $64 - (s + b) > 0$, where 64 is the address size