diff options
Diffstat (limited to 'src/H5HL.c')
| -rw-r--r-- | src/H5HL.c | 35 |
1 files changed, 35 insertions, 0 deletions
@@ -963,6 +963,41 @@ H5HL_insert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t buf_size, const void * need_more = need_size; new_heap_alloc = heap->heap_alloc + need_more; +/* + * XXX: This is a _total_ hack, a real kludge. :-/ The metadata cache currently + * responds very poorly when an object is inserted into the cache (or + * resized) that is larger than the current cache size. It waits through + * an entire 'epoch' of cache operations to resize the cache larger (getting + * _very_ poor performance), instead of immediately accommodating the large + * object by increasing the cache size. + * + * So, what we are doing here is to look at the current cache size, check + * if the new local heap will overwhelm the cache and, if so, resize the + * cache to be large enough to hold the new local heap block along with + * leaving room for other objects in the cache. + * + * John will be working on a fix inside the cache itself, so this special + * case code here can be removed when he's finished. - QAK, 2007/12/21 + */ +{ + H5AC_cache_config_t mdc_config; + + /* Retrieve the current cache information */ + mdc_config.version = H5AC__CURR_CACHE_CONFIG_VERSION; + if(H5AC_get_cache_auto_resize_config(f->shared->cache, &mdc_config) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (size_t)-1, "H5AC_get_cache_auto_resize_config() failed.") + + /* Check if the current cache will get blown out by adding this heap + * block and resize it if so. + */ + if((2 * new_heap_alloc) >= mdc_config.initial_size) { + mdc_config.set_initial_size = TRUE; + mdc_config.initial_size = 2 * new_heap_alloc; + + if(H5AC_set_cache_auto_resize_config(f->shared->cache, &mdc_config) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, (size_t)-1, "H5AC_set_cache_auto_resize_config() failed.") + } /* end if */ +} HDassert(heap->heap_alloc < new_heap_alloc); H5_CHECK_OVERFLOW(heap->heap_alloc, size_t, hsize_t); H5_CHECK_OVERFLOW(new_heap_alloc, size_t, hsize_t); |