cache - cache parameters
[ -L <line size>
] [ -M <len>
] [ -W
] [ -N <repetitions>
tries to determine the characteristics of the memory hierarchy. It
attempts to determine the number of caches, the size of each cache, the line
size for each cache, and the available memory parallelism at each level in the
memory hierarchy. The largest amount of memory it will examine is len
first attempts to determine the number and size of caches by
measuring the memory latency for various memory sizes. Once it has identified
the various caches it then measures the latency, parallelism, and line size
for each cache. Unfortunately, determining the cache size merely from latency
is exceedingly difficult due to variations in cache replacement and
is an experimental benchmark and is known to fail on many
processors. In particular there are a large number of machines with weird
caching behavior that confuse cache
and prevent it from accurately
determining the number and size of the various caches.
lmbench(8), line(8), tlb(8), par_mem(8).
Carl Staelin and Larry McVoy
Comments, suggestions, and bug reports are always welcome.