Function DetermineShardBits

be/src/util/cache/cache.cc:63–68

Determine the number of bits of the hash that should be used to determine the cache shard. This, in turn, determines the number of shards.

// Determine the number of bits of the hash that should be used to determine
// the cache shard. This, in turn, determines the number of shards.
int DetermineShardBits() {
  int bits = PREDICT_FALSE(FLAGS_cache_force_single_shard) ?
      0 : Bits::Log2Ceiling(base::NumCPUs());
  VLOG(1) << "Will use " << (1 << bits) << " shards for recency list cache.";
  return bits;
}

string ToString(Cache::EvictionPolicy p) {
  switch (p) {