Function PG_prefetch

libCacheSim/cache/prefetch/PG.c:156–186

prefetch some objects which are from `_PG_get_prefetch_list` @param cache the cache struct @param req the request containing the request @return */

 @return
 */
void PG_prefetch(cache_t *cache, const request_t *req) {
  PG_params_t *PG_params = (PG_params_t *)(cache->prefetcher->params);

  // begin prefetching
  GList *prefetch_list = _PG_get_prefetch_list(cache, req);
  if (prefetch_list) {
    GList *node = prefetch_list;
    request_t *new_req = my_malloc(request_t);
    copy_request(new_req, req);
    while (node) {
      new_req->obj_id = GPOINTER_TO_INT(node->data);
      new_req->obj_size =
          GPOINTER_TO_INT(g_hash_table_lookup(PG_params->cache_size_map, GINT_TO_POINTER(new_req->obj_id)));
      if (!cache->find(cache, new_req, false)) {
        while ((long)cache->get_occupied_byte(cache) + new_req->obj_size + cache->obj_md_size >
               (long)cache->cache_size) {
          cache->evict(cache, new_req);
        }
        cache->insert(cache, new_req);

        PG_params->num_of_prefetch += 1;

        g_hash_table_insert(PG_params->prefetched, GINT_TO_POINTER(new_req->obj_id), GINT_TO_POINTER(1));
      }
      node = node->next;
    }

    my_free(sizeof(request_t), new_req);
    g_list_free(prefetch_list);
  }
}

void free_PG_prefetcher(prefetcher_t *prefetcher) {
  PG_params_t *PG_params = (PG_params_t *)prefetcher->params;