Function LIRS_init

libCacheSim/cache/eviction/LIRS.c:80–123

end user facing functions init, free, get * @brief initialize the cache * * @param ccache_params some common cache parameters * @param cache_specific_params cache specific parameters, see parse_params * function or use -e "print" with the cachesim binary */

 * function or use -e "print" with the cachesim binary
 */
cache_t *LIRS_init(const common_cache_params_t ccache_params,
                   const char *cache_specific_params) {
  cache_t *cache =
      cache_struct_init("LIRS", ccache_params, cache_specific_params);
  cache->cache_init = LIRS_init;
  cache->cache_free = LIRS_free;
  cache->get = LIRS_get;
  cache->find = LIRS_find;
  cache->can_insert = LIRS_can_insert;
  cache->insert = LIRS_insert;
  cache->evict = LIRS_evict;
  cache->remove = LIRS_remove;
  cache->to_evict = LIRS_to_evict;

  if (ccache_params.consider_obj_metadata) {
    cache->obj_md_size = 8 * 2;
  } else {
    cache->obj_md_size = 0;
  }

  cache->eviction_params = (LIRS_params_t *)malloc(sizeof(LIRS_params_t));
  LIRS_params_t *params = (LIRS_params_t *)(cache->eviction_params);

  params->hirs_ratio = 0.01;
  params->hirs_limit =
      MAX(1, (uint64_t)(params->hirs_ratio * cache->cache_size));
  params->lirs_limit = cache->cache_size - params->hirs_limit;
  params->hirs_count = 0;
  params->lirs_count = 0;
  params->nonresident = 0;

  // initialize LRU for stack S and stack Q
  common_cache_params_t ccache_params_s = ccache_params;
  ccache_params_s.cache_size = params->lirs_limit;
  common_cache_params_t ccache_params_q = ccache_params;
  ccache_params_q.cache_size = params->hirs_limit;
  common_cache_params_t ccache_params_nh = ccache_params;

  params->LRU_s = LRU_init(ccache_params_s, NULL);
  params->LRU_q = LRU_init(ccache_params_q, NULL);
  params->LRU_nh = LRU_init(ccache_params_nh, NULL);

  return cache;
}

/**
 * free resources used by this cache