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Integrate whole chunks into unused dirty page purging machinery.

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Extend per arena unused dirty page purging to manage unused dirty chunks
in aaddtion to unused dirty runs.  Rather than immediately unmapping
deallocated chunks (or purging them in the --disable-munmap case), store
them in a separate set of trees, chunks_[sz]ad_dirty.  Preferrentially
allocate dirty chunks.  When excessive unused dirty pages accumulate,
purge runs and chunks in ingegrated LRU order (and unmap chunks in the
--enable-munmap case).

Refactor extent_node_t to provide accessor functions.
This commit is contained in:
Jason Evans 2015-02-15 18:04:46 -08:00
parent 40ab8f98e4
commit ee41ad409a
12 changed files with 631 additions and 248 deletions
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16
src/base.c
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@ -60,8 +60,8 @@ base_chunk_alloc(size_t minsize)
if (config_stats)
base_allocated += nsize;
}
node->addr = addr;
node->size = csize;
extent_node_addr_set(node, addr);
extent_node_size_set(node, csize);
return (node);
}
@ -84,8 +84,8 @@ base_alloc(size_t size)
*/
csize = CACHELINE_CEILING(size);
key.addr = NULL;
key.size = csize;
extent_node_addr_set(&key, NULL);
extent_node_size_set(&key, csize);
malloc_mutex_lock(&base_mtx);
node = extent_tree_szad_nsearch(&base_avail_szad, &key);
if (node != NULL) {
@ -100,10 +100,10 @@ base_alloc(size_t size)
goto label_return;
}
ret = node->addr;
if (node->size > csize) {
node->addr = (void *)((uintptr_t)ret + csize);
node->size -= csize;
ret = extent_node_addr_get(node);
if (extent_node_size_get(node) > csize) {
extent_node_addr_set(node, (void *)((uintptr_t)ret + csize));
extent_node_size_set(node, extent_node_size_get(node) - csize);
extent_tree_szad_insert(&base_avail_szad, node);
} else
base_node_dalloc(node);