Refactor base_alloc() to guarantee demand-zeroed memory.

Refactor base_alloc() to guarantee that allocations are carved from
demand-zeroed virtual memory.  This supports sparse data structures such
as multi-page radix tree nodes.

Enhance base_alloc() to keep track of fragments which were too small to
support previous allocation requests, and try to consume them during
subsequent requests.  This becomes important when request sizes commonly
approach or exceed the chunk size (as could radix tree node
allocations).
This commit is contained in:
Jason Evans
2015-01-30 21:49:19 -08:00
parent 918a1a5b3f
commit f500a10b2e
5 changed files with 114 additions and 78 deletions

View File

@@ -10,7 +10,6 @@
#ifdef JEMALLOC_H_EXTERNS
void *base_alloc(size_t size);
void *base_calloc(size_t number, size_t size);
extent_node_t *base_node_alloc(void);
void base_node_dalloc(extent_node_t *node);
size_t base_allocated_get(void);

View File

@@ -103,7 +103,6 @@ atomic_sub_z
base_alloc
base_allocated_get
base_boot
base_calloc
base_node_alloc
base_node_dalloc
base_postfork_child