Use jemalloc as memory allocator on linux.

In comparison to standard glibc allocator,
jemalloc fargments adress space less,
and scales linearly in multithreaded environment.
Author: Jason Evans, mad props to him.

--HG--
branch : trunk

1 files changed, 61 insertions, 0 deletions

diff --git a/dep/include/jemalloc/internal/chunk.h b/dep/include/jemalloc/internal/chunk.h
new file mode 100644
index 00000000000..1f6abf782f1
--- /dev/null
+++ b/dep/include/jemalloc/internal/chunk.h
@@ -0,0 +1,61 @@
+/******************************************************************************/
+#ifdef JEMALLOC_H_TYPES
+
+/*
+ * Size and alignment of memory chunks that are allocated by the OS's virtual
+ * memory system.
+ */
+#define	LG_CHUNK_DEFAULT	22
+
+/* Return the chunk address for allocation address a. */
+#define	CHUNK_ADDR2BASE(a)						\
+	((void *)((uintptr_t)(a) & ~chunksize_mask))
+
+/* Return the chunk offset of address a. */
+#define	CHUNK_ADDR2OFFSET(a)						\
+	((size_t)((uintptr_t)(a) & chunksize_mask))
+
+/* Return the smallest chunk multiple that is >= s. */
+#define	CHUNK_CEILING(s)						\
+	(((s) + chunksize_mask) & ~chunksize_mask)
+
+#endif /* JEMALLOC_H_TYPES */
+/******************************************************************************/
+#ifdef JEMALLOC_H_STRUCTS
+
+#endif /* JEMALLOC_H_STRUCTS */
+/******************************************************************************/
+#ifdef JEMALLOC_H_EXTERNS
+
+extern size_t		opt_lg_chunk;
+#ifdef JEMALLOC_SWAP
+extern bool		opt_overcommit;
+#endif
+
+#if (defined(JEMALLOC_STATS) || defined(JEMALLOC_PROF))
+/* Protects stats_chunks; currently not used for any other purpose. */
+extern malloc_mutex_t	chunks_mtx;
+/* Chunk statistics. */
+extern chunk_stats_t	stats_chunks;
+#endif
+
+extern size_t		chunksize;
+extern size_t		chunksize_mask; /* (chunksize - 1). */
+extern size_t		chunk_npages;
+extern size_t		arena_chunk_header_npages;
+extern size_t		arena_maxclass; /* Max size class for arenas. */
+
+void	*chunk_alloc(size_t size, bool *zero);
+void	chunk_dealloc(void *chunk, size_t size);
+bool	chunk_boot(void);
+
+#endif /* JEMALLOC_H_EXTERNS */
+/******************************************************************************/
+#ifdef JEMALLOC_H_INLINES
+
+#endif /* JEMALLOC_H_INLINES */
+/******************************************************************************/
+
+#include "jemalloc/internal/chunk_swap.h"
+#include "jemalloc/internal/chunk_dss.h"
+#include "jemalloc/internal/chunk_mmap.h"