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authorRickard Green <[email protected]>2013-08-23 17:29:58 +0200
committerSverker Eriksson <[email protected]>2013-09-30 17:45:44 +0200
commitef3da907bd566b43a4022f1cbb1ae3d103b9ec3e (patch)
tree4268ac511df4754087bccb80367466fd2eea3492 /erts/emulator/sys/common
parentc2dbcb69929ac18e7687f1df1de6613b34e2897b (diff)
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erts: erts_mmap supercarrier management and erts_mseg usage
* Coalescing and trimming of free segments in supercarrier * Management of super aligned and super unaligned areas in supercarrier * Management of reservation of physical memory * erts_mseg usage of erts_mmap
Diffstat (limited to 'erts/emulator/sys/common')
-rw-r--r--erts/emulator/sys/common/erl_mmap.c1120
-rw-r--r--erts/emulator/sys/common/erl_mmap.h89
-rw-r--r--erts/emulator/sys/common/erl_mseg.c860
-rw-r--r--erts/emulator/sys/common/erl_mseg.h34
4 files changed, 1354 insertions, 749 deletions
diff --git a/erts/emulator/sys/common/erl_mmap.c b/erts/emulator/sys/common/erl_mmap.c
index a16ee7ae39..aac01bf93c 100644
--- a/erts/emulator/sys/common/erl_mmap.c
+++ b/erts/emulator/sys/common/erl_mmap.c
@@ -20,11 +20,57 @@
# include "config.h"
#endif
-#include <sys.h>
-#include <erl_mmap.h>
+#include "sys.h"
#include <stddef.h>
+#include "erl_smp.h"
+#include "erl_mmap.h"
-#ifdef DEBUG
+#if defined(DEBUG) || 0
+# undef ERTS_MMAP_DEBUG
+# define ERTS_MMAP_DEBUG
+#endif
+
+/* #define ERTS_MMAP_DEBUG_FILL_AREAS */
+
+#ifdef ERTS_MMAP_DEBUG
+# define ERTS_MMAP_ASSERT(A) \
+ ((void) (!(A) \
+ ? erts_mmap_assert_failed(#A, __func__, __FILE__, __LINE__)\
+ : 1))
+static int
+erts_mmap_assert_failed(const char *a, const char *func, const char *file, int line)
+{
+ erts_fprintf(stderr, "%s:%d:%s() Assertion failed: %s\n",
+ (char *) file, line, (char *) func, (char *) a);
+ abort();
+ return 0;
+}
+#else
+# define ERTS_MMAP_ASSERT(A) ((void) 1)
+#endif
+
+/*
+ * `mmap_state.sa.bot` and `mmap_state.sua.top` are read only after
+ * initialization, but the other pointers are not; i.e., only
+ * ERTS_MMAP_IN_SUPERCARRIER() is allowed without the mutex held.
+ */
+#define ERTS_MMAP_IN_SUPERCARRIER(PTR) \
+ (((UWord) (PTR)) - ((UWord) mmap_state.sa.bot) \
+ < ((UWord) mmap_state.sua.top) - ((UWord) mmap_state.sa.bot))
+#define ERTS_MMAP_IN_SUPERALIGNED_AREA(PTR) \
+ (ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&mmap_state.mtx)), \
+ (((UWord) (PTR)) - ((UWord) mmap_state.sa.bot) \
+ < ((UWord) mmap_state.sa.top) - ((UWord) mmap_state.sa.bot)))
+#define ERTS_MMAP_IN_SUPERUNALIGNED_AREA(PTR) \
+ (ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&mmap_state.mtx)), \
+ (((UWord) (PTR)) - ((UWord) mmap_state.sua.bot) \
+ < ((UWord) mmap_state.sua.top) - ((UWord) mmap_state.sua.bot)))
+
+int erts_have_erts_mmap;
+UWord erts_page_inv_mask;
+
+#if defined(DEBUG) || defined(ERTS_MMAP_DEBUG)
+# undef RBT_DEBUG
# define RBT_DEBUG
#endif
#ifdef RBT_DEBUG
@@ -60,7 +106,7 @@ typedef struct {
#define SET_RED(N) ((N)->flags |= RED_FLG)
#define SET_BLACK(N) ((N)->flags &= ~RED_FLG)
-#define HARD_DEBUG /*SVERK*/
+/* #define HARD_DEBUG */
#ifdef HARD_DEBUG
# define HARD_CHECK_IS_MEMBER(ROOT,NODE) rbt_assert_is_member(ROOT,NODE)
# define HARD_CHECK_TREE(TREE,SZ) check_tree(TREE, SZ)
@@ -79,6 +125,134 @@ typedef struct {
char* end;
}ErtsFreeSegDesc;
+typedef struct {
+ RBTree stree;
+ RBTree atree;
+}ErtsFreeSegMap;
+
+static struct {
+ int (*reserve_physical)(char *, UWord);
+ void (*unreserve_physical)(char *, UWord);
+ int supercarrier;
+ int no_os_mmap;
+ /*
+ * Super unaligend area is located above super aligned
+ * area. That is, `sa.bot` is beginning of the super
+ * carrier, `sua.top` is the end of the super carrier,
+ * and sa.top and sua.bot moves towards eachother.
+ */
+ struct {
+ char *top;
+ char *bot;
+ ErtsFreeSegMap map;
+ } sua;
+ struct {
+ char *top;
+ char *bot;
+ ErtsFreeSegMap map;
+ } sa;
+#if HAVE_MMAP && (!defined(MAP_ANON) && !defined(MAP_ANONYMOUS))
+ int mmap_fd;
+#endif
+ erts_smp_mtx_t mtx;
+ char *desc_free_list;
+ struct {
+ struct {
+ UWord total;
+ struct {
+ UWord total;
+ UWord sa;
+ UWord sua;
+ } used;
+ } supercarrier;
+ struct {
+ UWord used;
+ } os;
+ } size;
+} mmap_state;
+
+#define ERTS_MMAP_SIZE_SC_SA_INC(SZ) \
+ do { \
+ mmap_state.size.supercarrier.used.total += (SZ); \
+ mmap_state.size.supercarrier.used.sa += (SZ); \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.total \
+ <= mmap_state.size.supercarrier.total); \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.sa \
+ <= mmap_state.size.supercarrier.used.total); \
+ } while (0)
+#define ERTS_MMAP_SIZE_SC_SA_DEC(SZ) \
+ do { \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.total >= (SZ)); \
+ mmap_state.size.supercarrier.used.total -= (SZ); \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.sa >= (SZ)); \
+ mmap_state.size.supercarrier.used.sa -= (SZ); \
+ } while (0)
+#define ERTS_MMAP_SIZE_SC_SUA_INC(SZ) \
+ do { \
+ mmap_state.size.supercarrier.used.total += (SZ); \
+ mmap_state.size.supercarrier.used.sua += (SZ); \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.total \
+ <= mmap_state.size.supercarrier.total); \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.sua \
+ <= mmap_state.size.supercarrier.used.total); \
+ } while (0)
+#define ERTS_MMAP_SIZE_SC_SUA_DEC(SZ) \
+ do { \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.total >= (SZ)); \
+ mmap_state.size.supercarrier.used.total -= (SZ); \
+ ERTS_MMAP_ASSERT(mmap_state.size.supercarrier.used.sua >= (SZ)); \
+ mmap_state.size.supercarrier.used.sua -= (SZ); \
+ } while (0)
+#define ERTS_MMAP_SIZE_OS_INC(SZ) \
+ do { \
+ ERTS_MMAP_ASSERT(mmap_state.size.os.used + (SZ) >= (SZ)); \
+ mmap_state.size.os.used += (SZ); \
+ } while (0)
+#define ERTS_MMAP_SIZE_OS_DEC(SZ) \
+ do { \
+ ERTS_MMAP_ASSERT(mmap_state.size.os.used >= (SZ)); \
+ mmap_state.size.os.used -= (SZ); \
+ } while (0)
+
+static void
+add_free_desc_area(char *start, char *end)
+{
+ if (end > start && sizeof(ErtsFreeSegDesc) <= end - start) {
+ ErtsFreeSegDesc *prev_desc, *desc;
+ char *desc_end;
+
+ prev_desc = (ErtsFreeSegDesc *) start;
+ prev_desc->start = mmap_state.desc_free_list;
+ desc = (ErtsFreeSegDesc *) (start + sizeof(ErtsFreeSegDesc));
+ desc_end = start + 2*sizeof(ErtsFreeSegDesc);
+
+ while (desc_end <= end) {
+ desc->start = (char *) prev_desc;
+ prev_desc = desc;
+ desc = (ErtsFreeSegDesc *) desc_end;
+ desc_end += sizeof(ErtsFreeSegDesc);
+ }
+ mmap_state.desc_free_list = (char *) prev_desc;
+ }
+}
+
+static ERTS_INLINE ErtsFreeSegDesc *
+alloc_desc(void)
+{
+ ErtsFreeSegDesc *res;
+ res = (ErtsFreeSegDesc *) mmap_state.desc_free_list;
+ if (res)
+ mmap_state.desc_free_list = res->start;
+ return res;
+}
+
+static ERTS_INLINE void
+free_desc(ErtsFreeSegDesc *desc)
+{
+ desc->start = mmap_state.desc_free_list;
+ mmap_state.desc_free_list = (char *) desc;
+}
+
static ERTS_INLINE ErtsFreeSegDesc* anode_to_desc(RBTNode* anode)
{
return (ErtsFreeSegDesc*) ((char*)anode - offsetof(ErtsFreeSegDesc, anode));
@@ -94,12 +268,6 @@ static ERTS_INLINE ErtsFreeSegDesc* node_to_desc(enum SortOrder order, RBTNode*
return order==ADDR_ORDER ? anode_to_desc(node) : snode_to_desc(node);
}
-typedef struct {
- RBTree stree;
- RBTree atree;
-}ErtsFreeSegMap;
-
-
#ifdef HARD_DEBUG
static ERTS_INLINE SWord cmp_blocks(enum SortOrder order,
RBTNode* lhs, RBTNode* rhs)
@@ -671,19 +839,927 @@ static ErtsFreeSegDesc* lookup_free_seg(ErtsFreeSegMap* map, SWord need_sz)
return best_desc;
}
+#if ERTS_HAVE_OS_MMAP
+/* Implementation of os_mmap()/os_munmap()/os_mremap()... */
+
+#if HAVE_MMAP
+# define ERTS_MMAP_PROT (PROT_READ|PROT_WRITE)
+# if defined(MAP_ANONYMOUS)
+# define ERTS_MMAP_FLAGS (MAP_ANON|MAP_PRIVATE)
+# define ERTS_MMAP_FD (-1)
+# elif defined(MAP_ANON)
+# define ERTS_MMAP_FLAGS (MAP_ANON|MAP_PRIVATE)
+# define ERTS_MMAP_FD (-1)
+# else
+# define ERTS_MMAP_FLAGS (MAP_PRIVATE)
+# define ERTS_MMAP_FD mmap_state.mmap_fd
+# endif
+#endif
-void erts_mmap_init(ErtsMMapInit* init)
+static ERTS_INLINE void *
+os_mmap(UWord size, int try_superalign)
{
-#ifdef HARD_DEBUG
- erts_fprintf(stderr, "SVERK: scs = %bpu\n", init->scs);
- erts_fprintf(stderr, "SVERK: sco = %i\n", init->sco);
- erts_fprintf(stderr, "SVERK: scmgc = %i\n", init->scmgc);
+#if HAVE_MMAP
+ void *res;
+#ifdef MAP_ALIGN
+ if (try_superalign)
+ res = mmap((void *) ERTS_SUPERALIGNED_SIZE, size, ERTS_MMAP_PROT,
+ ERTS_MMAP_FLAGS|MAP_ALIGN, ERTS_MMAP_FD, 0);
+ else
+#endif
+ res = mmap((void *) 0, size, ERTS_MMAP_PROT,
+ ERTS_MMAP_FLAGS, ERTS_MMAP_FD, 0);
+ if (res == MAP_FAILED)
+ return NULL;
+ return res;
+#elif HAVE_VIRTUALALLOC
+ return (void *) VirtualAlloc(NULL, (SIZE_T) size,
+ MEM_COMMIT|MEM_RESERVE, PAGE_READWRITE);
+#else
+# error "missing mmap() or similar"
+#endif
+}
+
+static ERTS_INLINE void
+os_munmap(void *ptr, UWord size)
+{
+#if HAVE_MMAP
+#ifdef ERTS_MMAP_DEBUG
+ int res =
+#endif
+ munmap(ptr, size);
+ ERTS_MMAP_ASSERT(res == 0);
+#elif HAVE_VIRTUALALLOC
+#ifdef DEBUG
+ BOOL res =
+#endif
+ VirtualFree((LPVOID) ptr, (SIZE_T) 0, MEM_RELEASE);
+ ERTS_MMAP_ASSERT(res != 0);
+#else
+# error "missing munmap() or similar"
+#endif
+}
+
+#ifdef ERTS_HAVE_OS_MREMAP
+# if HAVE_MREMAP
+# if defined(__NetBSD__)
+# define ERTS_MREMAP_FLAGS (0)
+# else
+# define ERTS_MREMAP_FLAGS (MREMAP_MAYMOVE)
+# endif
+# endif
+static ERTS_INLINE void *
+os_mremap(void *ptr, UWord old_size, UWord new_size, int try_superalign)
+{
+ void *new_seg;
+#if HAVE_MREMAP
+ new_seg = mremap(ptr, (size_t) old_size,
+# if defined(__NetBSD__)
+ NULL,
+# endif
+ (size_t) new_size, ERTS_MREMAP_FLAGS);
+ if (new_seg == (void *) MAP_FAILED)
+ return NULL;
+ return new_seg;
+#else
+# error "missing mremap() or similar"
+#endif
+}
+#endif
+
+#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
+#if HAVE_MMAP
+
+#define ERTS_MMAP_RESERVE_PROT (ERTS_MMAP_PROT)
+#define ERTS_MMAP_RESERVE_FLAGS (ERTS_MMAP_FLAGS|MAP_FIXED)
+#define ERTS_MMAP_UNRESERVE_PROT (PROT_NONE)
+#define ERTS_MMAP_UNRESERVE_FLAGS (ERTS_MMAP_FLAGS|MAP_NORESERVE|MAP_FIXED)
+#define ERTS_MMAP_VIRTUAL_PROT (PROT_NONE)
+#define ERTS_MMAP_VIRTUAL_FLAGS (ERTS_MMAP_FLAGS|MAP_NORESERVE)
+
+static int
+os_reserve_physical(char *ptr, UWord size)
+{
+ void *res = mmap((void *) ptr, (size_t) size, ERTS_MMAP_RESERVE_PROT,
+ ERTS_MMAP_RESERVE_FLAGS, ERTS_MMAP_FD, 0);
+ if (res == (void *) MAP_FAILED)
+ return 0;
+ return 1;
+}
+
+static void
+os_unreserve_physical(char *ptr, UWord size)
+{
+ void *res = mmap((void *) ptr, (size_t) size, ERTS_MMAP_UNRESERVE_PROT,
+ ERTS_MMAP_UNRESERVE_FLAGS, ERTS_MMAP_FD, 0);
+ if (res == (void *) MAP_FAILED)
+ erl_exit(ERTS_ABORT_EXIT, "Failed to unreserve memory");
+}
+
+static void *
+os_mmap_virtual(char *ptr, UWord size)
+{
+ void *res = mmap((void *) ptr, (size_t) size, ERTS_MMAP_VIRTUAL_PROT,
+ ERTS_MMAP_VIRTUAL_FLAGS, ERTS_MMAP_FD, 0);
+ if (res == (void *) MAP_FAILED)
+ return NULL;
+ return res;
+}
+
+#else
+#error "Missing reserve/unreserve physical memory implementation"
+#endif
+#endif /* ERTS_HAVE_OS_RESERVE_PHYSICAL_MEMORY */
+
+#endif /* ERTS_HAVE_OS_MMAP */
+
+static int reserve_noop(char *ptr, UWord size)
+{
+#ifdef ERTS_MMAP_DEBUG_FILL_AREAS
+ Uint32 *uip, *end = (Uint32 *) (ptr + size);
+
+ for (uip = (Uint32 *) ptr; uip < end; uip++)
+ ERTS_MMAP_ASSERT(*uip == (Uint32) 0xdeadbeef);
+ for (uip = (Uint32 *) ptr; uip < end; uip++)
+ *uip = (Uint32) 0xfeedfeed;
+#endif
+ return 1;
+}
+
+static void unreserve_noop(char *ptr, UWord size)
+{
+#ifdef ERTS_MMAP_DEBUG_FILL_AREAS
+ Uint32 *uip, *end = (Uint32 *) (ptr + size);
+
+ for (uip = (Uint32 *) ptr; uip < end; uip++)
+ *uip = (Uint32) 0xdeadbeef;
+#endif
+}
+
+void *
+erts_mmap(Uint32 flags, UWord *sizep)
+{
+ char *seg;
+ UWord asize = ERTS_PAGEALIGNED_CEILING(*sizep);
+
+ /* Map in premapped supercarrier */
+ if (mmap_state.supercarrier && !(ERTS_MMAPFLG_OS_ONLY & flags)) {
+ char *end;
+ ErtsFreeSegDesc *desc;
+ Uint32 superaligned = (ERTS_MMAPFLG_SUPERALIGNED & flags);
+
+ erts_smp_mtx_lock(&mmap_state.mtx);
+
+ if (!superaligned) {
+ desc = lookup_free_seg(&mmap_state.sua.map, asize);
+ if (desc) {
+ seg = desc->start;
+ end = seg+asize;
+ if (!mmap_state.reserve_physical(seg, asize))
+ goto supercarrier_reserve_failure;
+ if (desc->end == end) {
+ delete_free_seg(&mmap_state.sua.map, desc);
+ free_desc(desc);
+ }
+ else {
+ ERTS_MMAP_ASSERT(end < desc->end);
+ resize_free_seg(&mmap_state.sua.map, desc, end, desc->end);
+ }
+ ERTS_MMAP_SIZE_SC_SUA_INC(asize);
+ goto supercarrier_success;
+ }
+
+ if (asize <= mmap_state.sua.bot - mmap_state.sa.top) {
+ if (!mmap_state.reserve_physical(mmap_state.sua.bot - asize,
+ asize))
+ goto supercarrier_reserve_failure;
+ mmap_state.sua.bot -= asize;
+ seg = mmap_state.sua.bot;
+ ERTS_MMAP_SIZE_SC_SUA_INC(asize);
+ goto supercarrier_success;
+ }
+ }
+
+ asize = ERTS_SUPERALIGNED_CEILING(asize);
+
+ desc = lookup_free_seg(&mmap_state.sa.map, asize);
+ if (desc) {
+ seg = desc->start;
+ end = seg+asize;
+ if (!mmap_state.reserve_physical(seg, asize))
+ goto supercarrier_reserve_failure;
+ if (desc->end == end) {
+ delete_free_seg(&mmap_state.sa.map, desc);
+ free_desc(desc);
+ }
+ else {
+ ERTS_MMAP_ASSERT(end < desc->end);
+ resize_free_seg(&mmap_state.sa.map, desc, end, desc->end);
+ }
+ ERTS_MMAP_SIZE_SC_SA_INC(asize);
+ goto supercarrier_success;
+ }
+
+ if (superaligned) {
+
+ if (asize <= mmap_state.sua.bot - mmap_state.sa.top) {
+ seg = (void *) mmap_state.sa.top;
+ if (!mmap_state.reserve_physical(seg, asize))
+ goto supercarrier_reserve_failure;
+ mmap_state.sa.top += asize;
+ ERTS_MMAP_SIZE_SC_SA_INC(asize);
+ goto supercarrier_success;
+ }
+
+ desc = lookup_free_seg(&mmap_state.sua.map, asize + ERTS_SUPERALIGNED_SIZE);
+ if (desc) {
+ char *org_start = desc->start;
+ char *org_end = desc->end;
+
+ seg = (char *) ERTS_SUPERALIGNED_CEILING(org_start);
+ end = seg + asize;
+ if (!mmap_state.reserve_physical(seg, asize))
+ goto supercarrier_reserve_failure;
+ if (org_start != seg) {
+ ERTS_MMAP_ASSERT(org_start < seg);
+ resize_free_seg(&mmap_state.sua.map, desc, org_start, seg);
+ desc = NULL;
+ }
+ if (end != org_end) {
+ ERTS_MMAP_ASSERT(end < org_end);
+ if (desc)
+ resize_free_seg(&mmap_state.sua.map, desc, end, org_end);
+ else {
+ desc = alloc_desc();
+ if (!desc)
+ add_free_desc_area(end, org_end);
+ else
+ insert_free_seg(&mmap_state.sua.map, desc, end, org_end);
+ }
+ }
+ ERTS_MMAP_SIZE_SC_SA_INC(asize);
+ goto supercarrier_success;
+ }
+ }
+
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+ }
+
+#if ERTS_HAVE_OS_MMAP
+ /* Map using OS primitives */
+ if (!(ERTS_MMAPFLG_SUPERCARRIER_ONLY & flags) && !mmap_state.no_os_mmap) {
+ if (!(ERTS_MMAPFLG_SUPERALIGNED & flags)) {
+ seg = os_mmap(asize, 0);
+ if (!seg)
+ return NULL;
+ }
+ else {
+ asize = ERTS_SUPERALIGNED_CEILING(*sizep);
+ seg = os_mmap(asize, 1);
+ if (!seg)
+ return NULL;
+
+ if (!ERTS_IS_SUPERALIGNED(seg)) {
+ char *ptr;
+ UWord sz;
+
+ os_munmap(seg, asize);
+
+ ptr = os_mmap(asize + ERTS_SUPERALIGNED_SIZE, 1);
+ if (!ptr)
+ return NULL;
+
+ seg = (char *) ERTS_SUPERALIGNED_CEILING(ptr);
+ sz = (UWord) (seg - ptr);
+ ERTS_MMAP_ASSERT(sz <= ERTS_SUPERALIGNED_SIZE);
+ if (sz)
+ os_munmap(ptr, sz);
+ sz = ERTS_SUPERALIGNED_SIZE - sz;
+ if (sz)
+ os_munmap(seg+asize, sz);
+ }
+ }
+
+ ERTS_MMAP_SIZE_OS_INC(asize);
+ *sizep = asize;
+ return (void *) seg;
+ }
+#endif
+ *sizep = 0;
+ return NULL;
+
+supercarrier_success:
+
+#ifdef ERTS_MMAP_DEBUG
+ if ((ERTS_MMAPFLG_SUPERALIGNED & flags)
+ || ERTS_MMAP_IN_SUPERALIGNED_AREA(seg)) {
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(seg));
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(asize));
+ }
+ else {
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(seg));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(asize));
+ }
+#endif
+
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+
+ *sizep = asize;
+ return (void *) seg;
+
+supercarrier_reserve_failure:
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+
+ *sizep = 0;
+ return NULL;
+
+}
+
+void
+erts_munmap(Uint32 flags, void **ptrp, UWord *sizep)
+{
+ void *ptr = *ptrp;
+ UWord size = *sizep;
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(size));
+ if (!ERTS_MMAP_IN_SUPERCARRIER(ptr)) {
+ ERTS_MMAP_ASSERT(!mmap_state.no_os_mmap);
+#if ERTS_HAVE_OS_MMAP
+ ERTS_MMAP_SIZE_OS_DEC(size);
+ os_munmap(ptr, size);
+#endif
+ }
+ else {
+ char *start, *end;
+ ErtsFreeSegMap *map;
+ ErtsFreeSegDesc *prev, *next, *desc;
+
+ ERTS_MMAP_ASSERT(mmap_state.supercarrier);
+
+ start = (char *) ptr;
+ end = start + size;
+
+ erts_smp_mtx_lock(&mmap_state.mtx);
+
+ if (ERTS_MMAP_IN_SUPERALIGNED_AREA(ptr)) {
+
+ start = (char *) ERTS_SUPERALIGNED_CEILING(start);
+ end = (char *) ERTS_SUPERALIGNED_FLOOR(end);
+
+ size = (UWord) (end - start);
+ *ptrp = start;
+ *sizep = size;
+
+ map = &mmap_state.sa.map;
+ adjacent_free_seg(map, start, end, &prev, &next);
+
+ ERTS_MMAP_SIZE_SC_SA_DEC(size);
+ if (end == mmap_state.sa.top) {
+ ERTS_MMAP_ASSERT(!next);
+ if (prev) {
+ start = prev->start;
+ delete_free_seg(map, prev);
+ free_desc(prev);
+ }
+ mmap_state.sa.top = start;
+ goto supercarrier_success;
+ }
+ }
+ else {
+ ERTS_MMAP_ASSERT(ERTS_MMAP_IN_SUPERUNALIGNED_AREA(ptr));
+
+ map = &mmap_state.sua.map;
+ adjacent_free_seg(map, start, end, &prev, &next);
+
+ ERTS_MMAP_SIZE_SC_SUA_DEC(size);
+ if (start == mmap_state.sua.bot) {
+ ERTS_MMAP_ASSERT(!prev);
+ if (next) {
+ end = next->end;
+ delete_free_seg(map, next);
+ free_desc(next);
+ }
+ mmap_state.sua.bot = end;
+ goto supercarrier_success;
+ }
+ }
+
+ desc = NULL;
+
+ if (next) {
+ ERTS_MMAP_ASSERT(end < next->end);
+ end = next->end;
+ if (prev) {
+ delete_free_seg(map, next);
+ free_desc(next);
+ goto save_prev;
+ }
+ desc = next;
+ } else if (prev) {
+ save_prev:
+ ERTS_MMAP_ASSERT(prev->start < start);
+ start = prev->start;
+ desc = prev;
+ }
+
+ if (desc)
+ resize_free_seg(map, desc, start, end);
+ else {
+ desc = alloc_desc();
+ if (desc)
+ insert_free_seg(map, desc, start, end);
+ else {
+ if (map == &mmap_state.sa.map)
+ ERTS_MMAP_SIZE_SC_SA_INC(size);
+ else
+ ERTS_MMAP_SIZE_SC_SUA_INC(size);
+ add_free_desc_area(start, end);
+ }
+ }
+
+ supercarrier_success:
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+
+ mmap_state.unreserve_physical((char *) ptr, size);
+ }
+}
+
+static void *
+remap_move(Uint32 flags, void *ptr, UWord old_size, UWord *sizep)
+{
+ UWord size = *sizep;
+ UWord um_size = old_size;
+ void *um_ptr = ptr;
+ void *new_ptr = erts_mmap(flags, &size);
+ if (!new_ptr)
+ return NULL;
+ *sizep = size;
+ if (old_size < size)
+ size = old_size;
+ sys_memcpy(new_ptr, ptr, (size_t) size);
+ erts_munmap(flags, &um_ptr, &um_size);
+ ERTS_MMAP_ASSERT(um_ptr == ptr);
+ ERTS_MMAP_ASSERT(um_size == old_size);
+ return new_ptr;
+}
+
+void *
+erts_mremap(Uint32 flags, void *ptr, UWord old_size, UWord *sizep)
+{
+ void *new_ptr;
+ Uint32 superaligned;
+ UWord asize;
+
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(old_size));
+ ERTS_MMAP_ASSERT(sizep && ERTS_IS_PAGEALIGNED(*sizep));
+
+ if (!ERTS_MMAP_IN_SUPERCARRIER(ptr)) {
+
+ ERTS_MMAP_ASSERT(!mmap_state.no_os_mmap);
+
+ if (!(ERTS_MMAPFLG_OS_ONLY & flags) && mmap_state.supercarrier) {
+ new_ptr = remap_move(ERTS_MMAPFLG_SUPERCARRIER_ONLY|flags, ptr,
+ old_size, sizep);
+ if (new_ptr)
+ return new_ptr;
+ }
+
+ if (ERTS_MMAPFLG_SUPERCARRIER_ONLY & flags)
+ return NULL;
+
+#if ERTS_HAVE_OS_MREMAP || ERTS_HAVE_GENUINE_OS_MMAP
+ superaligned = (ERTS_MMAPFLG_SUPERALIGNED & flags);
+
+ if (superaligned) {
+ asize = ERTS_SUPERALIGNED_CEILING(*sizep);
+ if (asize == old_size && ERTS_IS_SUPERALIGNED(ptr)) {
+ *sizep = asize;
+ return ptr;
+ }
+ }
+ else {
+ asize = ERTS_PAGEALIGNED_CEILING(*sizep);
+ if (asize == old_size) {
+ *sizep = asize;
+ return ptr;
+ }
+ }
+
+#if ERTS_HAVE_GENUINE_OS_MMAP
+ if (asize < old_size
+ && (!superaligned
+ || ERTS_IS_SUPERALIGNED(ptr))) {
+ UWord um_sz;
+ new_ptr = ((char *) ptr) + asize;
+ ERTS_MMAP_ASSERT((((char *)ptr) + old_size) > (char *) new_ptr);
+ um_sz = (UWord) ((((char *) ptr) + old_size) - (char *) new_ptr);
+ ERTS_MMAP_SIZE_OS_DEC(um_sz);
+ os_munmap(new_ptr, um_sz);
+ *sizep = asize;
+ return ptr;
+ }
+#endif
+#if ERTS_HAVE_OS_MREMAP
+ if (superaligned)
+ return remap_move(flags, new_ptr, old_size, sizep);
+ else {
+ new_ptr = os_mremap(ptr, old_size, asize, 0);
+ if (!new_ptr)
+ return NULL;
+ if (asize > old_size)
+ ERTS_MMAP_SIZE_OS_INC(asize - old_size);
+ else
+ ERTS_MMAP_SIZE_OS_DEC(old_size - asize);
+ *sizep = asize;
+ return new_ptr;
+ }
+#endif
+#endif
+ }
+ else { /* In super carrier */
+ char *start, *end, *new_end;
+ ErtsFreeSegMap *map;
+ ErtsFreeSegDesc *prev, *next, *desc;
+
+ ERTS_MMAP_ASSERT(mmap_state.supercarrier);
+
+ if (ERTS_MMAPFLG_OS_ONLY & flags)
+ return remap_move(flags, ptr, old_size, sizep);
+
+ superaligned = (ERTS_MMAPFLG_SUPERALIGNED & flags);
+
+ asize = (superaligned
+ ? ERTS_SUPERALIGNED_CEILING(*sizep)
+ : ERTS_PAGEALIGNED_CEILING(*sizep));
+
+ erts_smp_mtx_lock(&mmap_state.mtx);
+
+ if (ERTS_MMAP_IN_SUPERALIGNED_AREA(ptr)
+ ? (!superaligned && lookup_free_seg(&mmap_state.sua.map, asize))
+ : (superaligned && lookup_free_seg(&mmap_state.sa.map, asize))) {
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+ /*
+ * Segment currently in wrong area (due to a previous memory
+ * shortage), move it to the right area.
+ * (remap_move() will succeed)
+ */
+ return remap_move(ERTS_MMAPFLG_SUPERCARRIER_ONLY|flags, ptr,
+ old_size, sizep);
+ }
+
+ if (asize == old_size) {
+ new_ptr = ptr;
+ goto supercarrier_resize_success;
+ }
+
+ start = (char *) ptr;
+ end = start + old_size;
+ new_end = start+asize;
+
+ if (asize < old_size) {
+ new_ptr = ptr;
+ if (!ERTS_MMAP_IN_SUPERALIGNED_AREA(ptr)) {
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(old_size));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(asize));
+ map = &mmap_state.sua.map;
+ ERTS_MMAP_SIZE_SC_SUA_DEC(old_size - asize);
+ }
+ else {
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(old_size));
+ if (!superaligned) {
+ /* must be a superaligned size in this area */
+ asize = ERTS_SUPERALIGNED_CEILING(asize);
+ ERTS_MMAP_ASSERT(asize <= old_size);
+ if (asize == old_size)
+ goto supercarrier_resize_success;
+ new_end = start+asize;
+ }
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(asize));
+ if (end == mmap_state.sa.top) {
+ mmap_state.sa.top = new_end;
+ mmap_state.unreserve_physical(((char *) ptr) + asize,
+ old_size - asize);
+ goto supercarrier_resize_success;
+ }
+ ERTS_MMAP_SIZE_SC_SA_DEC(old_size - asize);
+ map = &mmap_state.sa.map;
+ }
+
+ adjacent_free_seg(map, start, end, &prev, &next);
+
+ if (next)
+ resize_free_seg(map, next, new_end, next->end);
+ else {
+ desc = alloc_desc();
+ if (desc)
+ insert_free_seg(map, desc, new_end, end);
+ else {
+ if (map == &mmap_state.sa.map)
+ ERTS_MMAP_SIZE_SC_SA_INC(old_size - asize);
+ else
+ ERTS_MMAP_SIZE_SC_SUA_INC(old_size - asize);
+ add_free_desc_area(new_end, end);
+ goto supercarrier_resize_success;
+ }
+ }
+ mmap_state.unreserve_physical(((char *) ptr) + asize,
+ old_size - asize);
+ goto supercarrier_resize_success;
+ }
+
+ if (!ERTS_MMAP_IN_SUPERALIGNED_AREA(ptr)) {
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(old_size));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(asize));
+
+ adjacent_free_seg(&mmap_state.sua.map, start, end, &prev, &next);
+
+ if (next && new_end <= next->end) {
+ if (!mmap_state.reserve_physical(((char *) ptr) + old_size,
+ asize - old_size))
+ goto supercarrier_reserve_failure;
+ if (new_end < next->end)
+ resize_free_seg(&mmap_state.sua.map, next, new_end, next->end);
+ else {
+ delete_free_seg(&mmap_state.sua.map, next);
+ free_desc(next);
+ }
+ new_ptr = ptr;
+ ERTS_MMAP_SIZE_SC_SUA_INC(asize - old_size);
+ goto supercarrier_resize_success;
+ }
+ }
+ else { /* Superaligned area */
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(old_size));
+
+ if (!superaligned) {
+ /* must be a superaligned size in this area */
+ asize = ERTS_PAGEALIGNED_CEILING(asize);
+ new_end = start+asize;
+ }
+
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(asize));
+
+ if (end == mmap_state.sa.top) {
+ if (new_end <= mmap_state.sua.bot) {
+ if (!mmap_state.reserve_physical(((char *) ptr) + old_size,
+ asize - old_size))
+ goto supercarrier_reserve_failure;
+ mmap_state.sa.top = new_end;
+ new_ptr = ptr;
+ ERTS_MMAP_SIZE_SC_SA_INC(asize - old_size);
+ goto supercarrier_resize_success;
+ }
+ }
+ else {
+ adjacent_free_seg(&mmap_state.sa.map, start, end, &prev, &next);
+ if (next && new_end <= next->end) {
+ if (!mmap_state.reserve_physical(((char *) ptr) + old_size,
+ asize - old_size))
+ goto supercarrier_reserve_failure;
+ if (new_end < next->end)
+ resize_free_seg(&mmap_state.sa.map, next, new_end, next->end);
+ else {
+ delete_free_seg(&mmap_state.sa.map, next);
+ free_desc(next);
+ }
+ new_ptr = ptr;
+ ERTS_MMAP_SIZE_SC_SA_INC(asize - old_size);
+ goto supercarrier_resize_success;
+ }
+ }
+ }
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+
+ /* Failed to resize... */
+ }
+
+ return remap_move(flags, ptr, old_size, sizep);
+
+supercarrier_resize_success:
+
+#ifdef ERTS_MMAP_DEBUG
+ if ((ERTS_MMAPFLG_SUPERALIGNED & flags)
+ || ERTS_MMAP_IN_SUPERALIGNED_AREA(new_ptr)) {
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(new_ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_SUPERALIGNED(asize));
+ }
+ else {
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(new_ptr));
+ ERTS_MMAP_ASSERT(ERTS_IS_PAGEALIGNED(asize));
+ }
+#endif
+
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+
+ *sizep = asize;
+ return new_ptr;
+
+supercarrier_reserve_failure:
+
+ erts_smp_mtx_unlock(&mmap_state.mtx);
+ *sizep = 0;
+ return NULL;
+
+}
+
+int erts_mmap_in_supercarrier(void *ptr)
+{
+ return ERTS_MMAP_IN_SUPERCARRIER(ptr);
+}
+
+void
+erts_mmap_init(ErtsMMapInit *init)
+{
+ int virtual_map = 0;
+ char *start = NULL, *end = NULL;
+ UWord pagesize;
+#if defined(__WIN32__)
+ SYSTEM_INFO sysinfo;
+ GetSystemInfo(&sysinfo);
+ pagesize = (UWord) sysinfo.dwPageSize;
+#elif defined(_SC_PAGESIZE)
+ pagesize = (UWord) sysconf(_SC_PAGESIZE);
+#elif defined(HAVE_GETPAGESIZE)
+ pagesize = (UWord) getpagesize();
+#else
+# error "Do not know how to get page size"
+#endif
+#if defined(HARD_DEBUG) || 0
+ erts_fprintf(stderr, "erts_mmap: scs = %bpu\n", init->scs);
+ erts_fprintf(stderr, "erts_mmap: sco = %i\n", init->sco);
+ erts_fprintf(stderr, "erts_mmap: scmgc = %i\n", init->scmgc);
+#endif
+ erts_page_inv_mask = pagesize - 1;
+ if (pagesize & erts_page_inv_mask)
+ erl_exit(-1, "erts_mmap: Invalid pagesize: %bpu\n",
+ pagesize);
+
+ erts_have_erts_mmap = 0;
+
+ mmap_state.reserve_physical = reserve_noop;
+ mmap_state.unreserve_physical = unreserve_noop;
+
+#if HAVE_MMAP && !defined(MAP_ANON)
+ mmap_state.mmap_fd = open("/dev/zero", O_RDWR);
+ if (mmap_state.mmap_fd < 0)
+ erl_exit(-1, "erts_mmap: Failed to open /dev/zero\n");
+#endif
+
+ erts_smp_mtx_init(&mmap_state.mtx, "erts_mmap");
+
+#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
+ if (init->virtual_range.start) {
+ char *ptr;
+ UWord sz;
+ ptr = (char *) ERTS_PAGEALIGNED_CEILING(init->virtual_range.start);
+ end = (char *) ERTS_PAGEALIGNED_FLOOR(init->virtual_range.end);
+ sz = end - ptr;
+ start = os_mmap_virtual(ptr, sz);
+ if (!start || start > ptr || start >= end)
+ erl_exit(-1,
+ "erts_mmap: Failed to create virtual range for super carrier\n");
+ sz = start - ptr;
+ if (sz)
+ os_munmap(end, sz);
+ mmap_state.reserve_physical = os_reserve_physical;
+ mmap_state.unreserve_physical = os_unreserve_physical;
+ virtual_map = 1;
+ }
+ else
+#endif
+ if (init->predefined_area.start) {
+ start = init->predefined_area.start;
+ end = init->predefined_area.end;
+ if (end != (void *) 0 && end < start)
+ end = start;
+ }
+#if ERTS_HAVE_OS_MMAP
+ else if (init->scs) {
+ UWord sz;
+ sz = ERTS_PAGEALIGNED_CEILING(init->scs);
+#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
+ if (!init->scrpm) {
+ start = os_mmap_virtual(NULL, sz);
+ mmap_state.reserve_physical = os_reserve_physical;
+ mmap_state.unreserve_physical = os_unreserve_physical;
+ virtual_map = 1;
+ }
+ else
+#endif
+ {
+ /*
+ * The whole supercarrier will by physically
+ * reserved all the time.
+ */
+ start = os_mmap(sz, 1);
+ }
+ if (!start)
+ erl_exit(-1,
+ "erts_mmap: Failed to create super carrier of size %bpu MB\n",
+ init->scs/1024/1024);
+ end = start + sz;
+#ifdef ERTS_MMAP_DEBUG_FILL_AREAS
+ if (!virtual_map) {
+ Uint32 *uip;
+
+ for (uip = (Uint32 *) start; uip < (Uint32 *) end; uip++)
+ *uip = (Uint32) 0xdeadbeef;
+ }
+#endif
+ }
+ if (!mmap_state.no_os_mmap)
+ erts_have_erts_mmap |= ERTS_HAVE_ERTS_OS_MMAP;
+#endif
+
+ mmap_state.size.supercarrier.total = 0;
+ mmap_state.size.supercarrier.used.total = 0;
+ mmap_state.size.supercarrier.used.sa = 0;
+ mmap_state.size.supercarrier.used.sua = 0;
+ mmap_state.size.os.used = 0;
+
+ if (!start) {
+ mmap_state.sa.bot = NULL;
+ mmap_state.sua.top = NULL;
+ mmap_state.sa.bot = NULL;
+ mmap_state.sua.top = NULL;
+ mmap_state.no_os_mmap = 0;
+ }
+ else {
+ size_t desc_size;
+
+ mmap_state.no_os_mmap = init->sco;
+
+ desc_size = init->scmgc;
+ if (desc_size < 100)
+ desc_size = 100;
+ desc_size *= sizeof(ErtsFreeSegDesc);
+ if ((desc_size
+ + ERTS_SUPERALIGNED_SIZE
+ + ERTS_PAGEALIGNED_SIZE) > end - start)
+ erl_exit(-1, "erts_mmap: No space for segments in super carrier\n");
+
+ mmap_state.sa.bot = start;
+ mmap_state.sa.bot += desc_size;
+ mmap_state.sa.bot = (char *) ERTS_SUPERALIGNED_CEILING(mmap_state.sa.bot);
+ mmap_state.sa.top = mmap_state.sa.bot;
+ mmap_state.sua.top = (char *) ERTS_SUPERALIGNED_FLOOR(end);
+ mmap_state.sua.bot = mmap_state.sua.top;
+
+ mmap_state.size.os.used += (UWord) (mmap_state.sa.bot - start);
+
+ if (end == (void *) 0) {
+ /*
+ * Very unlikely, but we need a guarantee
+ * that `mmap_state.sua.top` always will
+ * compare as larger than all segment pointers
+ * into the super carrier...
+ */
+ mmap_state.sua.top -= ERTS_PAGEALIGNED_SIZE;
+ mmap_state.size.os.used += ERTS_PAGEALIGNED_SIZE;
+ }
+
+ mmap_state.size.supercarrier.total = (UWord) (mmap_state.sua.top - mmap_state.sa.bot);
+
+ /*
+ * Area before (and after) super carrier
+ * will be used for free segment descritors.
+ */
+ mmap_state.desc_free_list = NULL;
+#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
+ if (virtual_map && mmap_state.sa.bot - start > 0)
+ os_reserve_physical(start, mmap_state.sa.bot - start);
+#endif
+ add_free_desc_area(start, mmap_state.sa.bot);
+#ifdef ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION
+ if (virtual_map && end - mmap_state.sua.top > 0)
+ os_reserve_physical(mmap_state.sua.top, end - mmap_state.sua.top);
+#endif
+ add_free_desc_area(mmap_state.sua.top, end);
+
+ init_free_seg_map(&mmap_state.sa.map, 0);
+ init_free_seg_map(&mmap_state.sua.map, 1);
+
+ mmap_state.supercarrier = 1;
+ erts_have_erts_mmap |= ERTS_HAVE_ERTS_SUPERCARRIER_MMAP;
+
+#ifdef HARD_DEBUG
{
void test_it(void);
test_it();
}
#endif
+
+ }
+#if !ERTS_HAVE_OS_MMAP
+ mmap_state.no_os_mmap = 1;
+#endif
+
}
@@ -897,12 +1973,6 @@ print_tree(enum SortOrder order, RBTNode* root)
#endif /* PRINT_TREE */
-
-static ErtsFreeSegDesc* new_desc(void)
-{
- return (ErtsFreeSegDesc*) malloc(sizeof(ErtsFreeSegDesc));
-}
-
void test_it(void)
{
ErtsFreeSegMap map;
@@ -912,13 +1982,13 @@ void test_it(void)
for (i=0; i<2; i++) {
init_free_seg_map(&map, i);
- insert_free_seg(&map, new_desc(), (char*)0x11000, (char*)0x12000);
+ insert_free_seg(&map, alloc_desc(), (char*)0x11000, (char*)0x12000);
check_tree(&map.atree, 0); check_tree(&map.stree, 0);
- insert_free_seg(&map, new_desc(), (char*)0x13000, (char*)0x14000);
+ insert_free_seg(&map, alloc_desc(), (char*)0x13000, (char*)0x14000);
check_tree(&map.atree, 0); check_tree(&map.stree, 0);
- insert_free_seg(&map, new_desc(), (char*)0x15000, (char*)0x17000);
+ insert_free_seg(&map, alloc_desc(), (char*)0x15000, (char*)0x17000);
check_tree(&map.atree, 0); check_tree(&map.stree, 0);
- insert_free_seg(&map, new_desc(), (char*)0x8000, (char*)0x10000);
+ insert_free_seg(&map, alloc_desc(), (char*)0x8000, (char*)0x10000);
check_tree(&map.atree, 0); check_tree(&map.stree, 0);
desc = lookup_free_seg(&map, 0x500);
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h
index 64baa6c493..143f1aff3e 100644
--- a/erts/emulator/sys/common/erl_mmap.h
+++ b/erts/emulator/sys/common/erl_mmap.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2002-2013. All Rights Reserved.
+ * Copyright Ericsson AB 2013. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -17,10 +17,95 @@
* %CopyrightEnd%
*/
+#ifndef ERL_MMAP_H__
+#define ERL_MMAP_H__
+
+#include "sys.h"
+
+#define ERTS_MMAP_SUPERALIGNED_BITS (18)
+/* Affects hard limits for sbct and lmbcs documented in erts_alloc.xml */
+
+#define ERTS_MMAPFLG_OS_ONLY (((Uint32) 1) << 0)
+#define ERTS_MMAPFLG_SUPERCARRIER_ONLY (((Uint32) 1) << 1)
+#define ERTS_MMAPFLG_SUPERALIGNED (((Uint32) 1) << 2)
+
+#define ERTS_HAVE_ERTS_OS_MMAP (1 << 0)
+#define ERTS_HAVE_ERTS_SUPERCARRIER_MMAP (1 << 1)
+extern int erts_have_erts_mmap;
+extern UWord erts_page_inv_mask;
+
typedef struct {
- SWord scs; /* super carrier size */
+ struct {
+ char *start;
+ char *end;
+ } virtual_range;
+ struct {
+ char *start;
+ char *end;
+ } predefined_area;
+ UWord scs; /* super carrier size */
int sco; /* super carrier only? */
Uint scmgc; /* super carrier: max guaranteed (number of) carriers */
+ int scrpm;
}ErtsMMapInit;
+#define ERTS_MMAP_INIT_DEFAULT_INITER \
+ {{NULL, NULL}, {NULL, NULL}, 0, 1, (1 << 16), 1}
+
+void *erts_mmap(Uint32 flags, UWord *sizep);
+void erts_munmap(Uint32 flags, void **ptrp, UWord *sizep);
+void *erts_mremap(Uint32 flags, void *ptr, UWord old_size, UWord *sizep);
+int erts_mmap_in_supercarrier(void *ptr);
void erts_mmap_init(ErtsMMapInit*);
+
+#define ERTS_SUPERALIGNED_SIZE \
+ (1 << ERTS_MMAP_SUPERALIGNED_BITS)
+#define ERTS_INV_SUPERALIGNED_MASK \
+ ((UWord) (ERTS_SUPERALIGNED_SIZE - 1))
+#define ERTS_SUPERALIGNED_MASK \
+ (~ERTS_INV_SUPERALIGNED_MASK)
+#define ERTS_SUPERALIGNED_FLOOR(X) \
+ (((UWord) (X)) & ERTS_SUPERALIGNED_MASK)
+#define ERTS_SUPERALIGNED_CEILING(X) \
+ ERTS_SUPERALIGNED_FLOOR((X) + ERTS_INV_SUPERALIGNED_MASK)
+#define ERTS_IS_SUPERALIGNED(X) \
+ (((UWord) (X) & ERTS_INV_SUPERALIGNED_MASK) == 0)
+
+#define ERTS_INV_PAGEALIGNED_MASK \
+ (erts_page_inv_mask)
+#define ERTS_PAGEALIGNED_MASK \
+ (~ERTS_INV_PAGEALIGNED_MASK)
+#define ERTS_PAGEALIGNED_FLOOR(X) \
+ (((UWord) (X)) & ERTS_PAGEALIGNED_MASK)
+#define ERTS_PAGEALIGNED_CEILING(X) \
+ ERTS_PAGEALIGNED_FLOOR((X) + ERTS_INV_PAGEALIGNED_MASK)
+#define ERTS_IS_PAGEALIGNED(X) \
+ (((UWord) (X) & ERTS_INV_PAGEALIGNED_MASK) == 0)
+#define ERTS_PAGEALIGNED_SIZE \
+ (ERTS_INV_PAGEALIGNED_MASK + 1)
+
+#ifndef HAVE_MMAP
+# define HAVE_MMAP 0
+#endif
+#ifndef HAVE_MREMAP
+# define HAVE_MREMAP 0
+#endif
+#if HAVE_MMAP
+# define ERTS_HAVE_OS_MMAP 1
+# define ERTS_HAVE_GENUINE_OS_MMAP 1
+# if HAVE_MREMAP
+# define ERTS_HAVE_OS_MREMAP 1
+# endif
+# if defined(MAP_FIXED) && defined(MAP_NORESERVE)
+# define ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION 1
+# endif
+#endif
+
+#ifndef HAVE_VIRTUALALLOC
+# define HAVE_VIRTUALALLOC 0
+#endif
+#if HAVE_VIRTUALALLOC
+# define ERTS_HAVE_OS_MMAP 1
+#endif
+
+#endif /* ERL_MMAP_H__ */
diff --git a/erts/emulator/sys/common/erl_mseg.c b/erts/emulator/sys/common/erl_mseg.c
index 64fcb6bb40..b21d6ca393 100644
--- a/erts/emulator/sys/common/erl_mseg.c
+++ b/erts/emulator/sys/common/erl_mseg.c
@@ -100,45 +100,6 @@ static int atoms_initialized;
typedef struct mem_kind_t MemKind;
-#if HALFWORD_HEAP
-static int initialize_pmmap(void);
-static void *pmmap(size_t size);
-static int pmunmap(void *p, size_t size);
-static void *pmremap(void *old_address, size_t old_size,
- size_t new_size);
-#endif
-
-#if HAVE_MMAP
-/* Mmap ... */
-
-#define MMAP_PROT (PROT_READ|PROT_WRITE)
-
-
-#ifdef MAP_ANON
-# define MMAP_FLAGS (MAP_ANON|MAP_PRIVATE)
-# define MMAP_FD (-1)
-#else
-# define MMAP_FLAGS (MAP_PRIVATE)
-# define MMAP_FD mmap_fd
-static int mmap_fd;
-#endif
-
-#if HAVE_MREMAP
-# define HAVE_MSEG_RECREATE 1
-#else
-# define HAVE_MSEG_RECREATE 0
-#endif
-
-#if HALFWORD_HEAP
-#define CAN_PARTLY_DESTROY 0
-#else
-#define CAN_PARTLY_DESTROY 1
-#endif
-#else /* #if HAVE_MMAP */
-#define CAN_PARTLY_DESTROY 0
-#error "Not supported"
-#endif /* #if HAVE_MMAP */
-
const ErtsMsegOpt_t erts_mseg_default_opt = {
1, /* Use cache */
1, /* Preserv data */
@@ -163,9 +124,7 @@ typedef struct {
CallCounter create;
CallCounter create_resize;
CallCounter destroy;
-#if HAVE_MSEG_RECREATE
CallCounter recreate;
-#endif
CallCounter clear_cache;
CallCounter check_cache;
} ErtsMsegCalls;
@@ -236,11 +195,6 @@ struct ErtsMsegAllctr_t_ {
Uint rel_max_cache_bad_fit;
ErtsMsegCalls calls;
-
-#if CAN_PARTLY_DESTROY
- Uint min_seg_size;
-#endif
-
};
typedef union {
@@ -344,69 +298,31 @@ schedule_cache_check(ErtsMsegAllctr_t *ma) {
}
}
-/* remove ErtsMsegAllctr_t from arguments?
- * only used for statistics
- */
-static ERTS_INLINE void *
-mmap_align(ErtsMsegAllctr_t *ma, void *addr, size_t length, int prot, int flags, int fd, off_t offset) {
-
- char *p, *q;
- UWord d;
-
- p = mmap(addr, length, prot, flags, fd, offset);
-
- if (MAP_IS_ALIGNED(p) || p == MAP_FAILED)
- return p;
-
- if (ma)
- INC_CC(ma, create_resize);
-
- munmap(p, length);
-
- if ((p = mmap(addr, length + MSEG_ALIGNED_SIZE, prot, flags, fd, offset)) == MAP_FAILED)
- return MAP_FAILED;
-
- q = (void *)ALIGNED_CEILING((char *)p);
- d = (UWord)(q - p);
-
- if (d > 0)
- munmap(p, d);
-
- if (MSEG_ALIGNED_SIZE - d > 0)
- munmap((void *)(q + length), MSEG_ALIGNED_SIZE - d);
-
- return q;
-}
+/* #define ERTS_PRINT_ERTS_MMAP */
static ERTS_INLINE void *
-mseg_create(ErtsMsegAllctr_t *ma, MemKind* mk, Uint size)
+mseg_create(ErtsMsegAllctr_t *ma, Uint flags, MemKind* mk, UWord *sizep)
{
+#ifdef ERTS_PRINT_ERTS_MMAP
+ UWord req_size = *sizep;
+#endif
void *seg;
- ASSERT(size % MSEG_ALIGNED_SIZE == 0);
-
+ Uint32 mmap_flags = 0;
#if HALFWORD_HEAP
- if (mk == &ma->low_mem) {
- seg = pmmap(size);
- if ((unsigned long) seg & CHECK_POINTER_MASK) {
- erts_fprintf(stderr,"Pointer mask failure (0x%08lx)\n",(unsigned long) seg);
- return NULL;
- }
- } else
+ mmap_flags |= ((mk == &ma->low_mem)
+ ? ERTS_MMAPFLG_SUPERCARRIER_ONLY
+ : ERTS_MMAPFLG_OS_ONLY);
#endif
- {
-#if HAVE_MMAP
- {
- seg = (void *) mmap_align(ma, (void *) 0, (size_t) size,
- MMAP_PROT, MMAP_FLAGS, MMAP_FD, 0);
- if (seg == (void *) MAP_FAILED)
- seg = NULL;
-
- ASSERT(MAP_IS_ALIGNED(seg) || !seg);
- }
-#else
-# error "Missing mseg_create() implementation"
+ if (MSEG_FLG_IS_2POW(flags))
+ mmap_flags |= ERTS_MMAPFLG_SUPERALIGNED;
+
+ seg = erts_mmap(mmap_flags, sizep);
+
+#ifdef ERTS_PRINT_ERTS_MMAP
+ erts_fprintf(stderr, "%p = erts_mmap(%s, {%bpu, %bpu});\n", seg,
+ (mmap_flags & ERTS_MMAPFLG_SUPERALIGNED) ? "sa" : "sua",
+ req_size, *sizep);
#endif
- }
INC_CC(ma, create);
@@ -414,91 +330,55 @@ mseg_create(ErtsMsegAllctr_t *ma, MemKind* mk, Uint size)
}
static ERTS_INLINE void
-mseg_destroy(ErtsMsegAllctr_t *ma, MemKind* mk, void *seg, Uint size) {
- ERTS_DECLARE_DUMMY(int res);
-
+mseg_destroy(ErtsMsegAllctr_t *ma, Uint flags, MemKind* mk, void **seg_pp, UWord *size_p) {
+
+ Uint32 mmap_flags = 0;
#if HALFWORD_HEAP
- if (mk == &ma->low_mem) {
- res = pmunmap((void *) seg, size);
- }
- else
+ mmap_flags |= ((mk == &ma->low_mem)
+ ? ERTS_MMAPFLG_SUPERCARRIER_ONLY
+ : ERTS_MMAPFLG_OS_ONLY);
#endif
- {
-#ifdef HAVE_MMAP
- res = munmap((void *) seg, size);
-#else
-# error "Missing mseg_destroy() implementation"
+ if (MSEG_FLG_IS_2POW(flags))
+ mmap_flags |= ERTS_MMAPFLG_SUPERALIGNED;
+
+ erts_munmap(mmap_flags, seg_pp, size_p);
+#ifdef ERTS_PRINT_ERTS_MMAP
+ erts_fprintf(stderr, "erts_munmap(%s, %p, %bpu);\n",
+ (mmap_flags & ERTS_MMAPFLG_SUPERALIGNED) ? "sa" : "sua",
+ *seg_pp, *size_p);
#endif
- }
-
- ASSERT(size % MSEG_ALIGNED_SIZE == 0);
- ASSERT(res == 0);
-
INC_CC(ma, destroy);
}
-#if HAVE_MSEG_RECREATE
-#if defined(__NetBSD__)
-#define MREMAP_FLAGS (0)
-#else
-#define MREMAP_FLAGS (MREMAP_MAYMOVE)
-#endif
-
-
-/* mseg_recreate
- * May return *unaligned* segments as in address not aligned to MSEG_ALIGNMENT
- * it is still page aligned
- *
- * This is fine for single block carriers as long as we don't cache misaligned
- * segments (since multiblock carriers may use them)
- *
- * For multiblock carriers we *need* MSEG_ALIGNMENT but mbc's will never be
- * reallocated.
- *
- * This should probably be fixed the following way:
- * 1) Use an option to segment allocation - NEED_ALIGNMENT
- * 2) Add mremap_align which takes care of aligning a new a mremaped area
- * 3) Fix the cache to handle of aligned and unaligned segments
- */
-
static ERTS_INLINE void *
-mseg_recreate(ErtsMsegAllctr_t *ma, MemKind* mk, void *old_seg, Uint old_size, Uint new_size)
+mseg_recreate(ErtsMsegAllctr_t *ma, Uint flags, MemKind* mk, void *old_seg, UWord old_size, UWord *sizep)
{
+#ifdef ERTS_PRINT_ERTS_MMAP
+ UWord req_size = *sizep;
+#endif
void *new_seg;
-
- ASSERT(old_size % MSEG_ALIGNED_SIZE == 0);
- ASSERT(new_size % MSEG_ALIGNED_SIZE == 0);
-
+ Uint32 mmap_flags = 0;
#if HALFWORD_HEAP
- if (mk == &ma->low_mem) {
- new_seg = (void *) pmremap((void *) old_seg,
- (size_t) old_size,
- (size_t) new_size);
- }
- else
-#endif
- {
-#if HAVE_MREMAP
-#if defined(__NetBSD__)
- new_seg = mremap(old_seg, (size_t)old_size, NULL, new_size, MREMAP_FLAGS);
-#else
- new_seg = mremap(old_seg, (size_t)old_size, (size_t)new_size, MREMAP_FLAGS);
+ mmap_flags |= ((mk == &ma->low_mem)
+ ? ERTS_MMAPFLG_SUPERCARRIER_ONLY
+ : ERTS_MMAPFLG_OS_ONLY);
#endif
- if (new_seg == (void *) MAP_FAILED)
- new_seg = NULL;
-#else
-#error "Missing mseg_recreate() implementation"
-#endif
- }
+ if (MSEG_FLG_IS_2POW(flags))
+ mmap_flags |= ERTS_MMAPFLG_SUPERALIGNED;
+
+ new_seg = erts_mremap(mmap_flags, old_seg, old_size, sizep);
+#ifdef ERTS_PRINT_ERTS_MMAP
+ erts_fprintf(stderr, "%p = erts_mremap(%s, %p, %bpu, {%bpu, %bpu});\n",
+ new_seg, (mmap_flags & ERTS_MMAPFLG_SUPERALIGNED) ? "sa" : "sua",
+ old_seg, old_size, req_size, *sizep);
+#endif
INC_CC(ma, recreate);
return new_seg;
}
-#endif /* #if HAVE_MSEG_RECREATE */
-
#ifdef DEBUG
#define ERTS_DBG_MA_CHK_THR_ACCESS(MA) \
do { \
@@ -566,14 +446,19 @@ static ERTS_INLINE int cache_bless_segment(MemKind *mk, void *seg, Uint size, Ui
return 1;
} else if (!MSEG_FLG_IS_2POW(flags) && !erts_circleq_is_empty(&(mk->cache_unpowered_node))) {
-
+ void *destr_seg;
+ UWord destr_size;
/* No free slots.
* Evict oldest slot from unpowered cache so we can cache an unpowered (sbc) segment */
c = erts_circleq_tail(&(mk->cache_unpowered_node));
erts_circleq_remove(c);
- mseg_destroy(mk->ma, mk, c->seg, c->size);
+ destr_seg = c->seg;
+ destr_size = c->size;
+ mseg_destroy(mk->ma, ERTS_MSEG_FLG_NONE, mk, &destr_seg, &destr_size);
+ ASSERT(destr_seg == c->seg);
+ ASSERT(destr_size == c->size);
mseg_cache_clear_node(c);
c->seg = seg;
@@ -593,13 +478,20 @@ static ERTS_INLINE int cache_bless_segment(MemKind *mk, void *seg, Uint size, Ui
int i;
for( i = 0; i < CACHE_AREAS; i++) {
+ void *destr_seg;
+ UWord destr_size;
if (erts_circleq_is_empty(&(mk->cache_powered_node[i])))
continue;
c = erts_circleq_tail(&(mk->cache_powered_node[i]));
erts_circleq_remove(c);
- mseg_destroy(mk->ma, mk, c->seg, c->size);
+ destr_seg = seg;
+ destr_size = c->size;
+ mseg_destroy(mk->ma, ERTS_MSEG_FLG_2POW, mk, &destr_seg, &destr_size);
+ ASSERT(destr_seg == c->seg);
+ ASSERT(destr_size == c->size);
+
mseg_cache_clear_node(c);
c->seg = seg;
@@ -614,9 +506,9 @@ static ERTS_INLINE int cache_bless_segment(MemKind *mk, void *seg, Uint size, Ui
return 0;
}
-static ERTS_INLINE void *cache_get_segment(MemKind *mk, Uint *size_p, Uint flags) {
+static ERTS_INLINE void *cache_get_segment(MemKind *mk, UWord *size_p, Uint flags) {
- Uint size = *size_p;
+ Uint size = (UWord) *size_p;
ERTS_DBG_MK_CHK_THR_ACCESS(mk);
@@ -653,7 +545,11 @@ static ERTS_INLINE void *cache_get_segment(MemKind *mk, Uint *size_p, Uint flags
ASSERT(!(mk->cache_size < 0));
if (csize != size) {
- mseg_destroy(mk->ma, mk, (char *)seg + size, csize - size);
+ void *destr_seg = ((char *) seg) + size;
+ UWord destr_size = csize - size;
+ mseg_destroy(mk->ma, ERTS_MSEG_FLG_2POW, mk, &destr_seg, &destr_size);
+ *size_p = (UWord) (destr_seg - seg);
+ ASSERT(c->seg + c->size == destr_seg + destr_size);
}
return seg;
@@ -683,7 +579,7 @@ static ERTS_INLINE void *cache_get_segment(MemKind *mk, Uint *size_p, Uint flags
mseg_cache_clear_node(c);
erts_circleq_push_head(&(mk->cache_free), c);
- *size_p = csize;
+ *size_p = (UWord) csize;
return seg;
@@ -714,7 +610,7 @@ static ERTS_INLINE void *cache_get_segment(MemKind *mk, Uint *size_p, Uint flags
ASSERT((size % GET_PAGE_SIZE) == 0);
ASSERT((best->size % GET_PAGE_SIZE) == 0);
- *size_p = size;
+ *size_p = (UWord) size;
return seg;
@@ -728,7 +624,9 @@ static ERTS_INLINE void *cache_get_segment(MemKind *mk, Uint *size_p, Uint flags
* using callbacks from aux-work in the scheduler.
*/
-static ERTS_INLINE Uint mseg_drop_one_memkind_cache_size(MemKind *mk, cache_t *head) {
+static ERTS_INLINE Uint mseg_drop_one_memkind_cache_size(MemKind *mk, Uint flags, cache_t *head) {
+ void *destr_seg;
+ UWord destr_size;
cache_t *c = NULL;
c = erts_circleq_tail(head);
@@ -737,7 +635,11 @@ static ERTS_INLINE Uint mseg_drop_one_memkind_cache_size(MemKind *mk, cache_t *h
if (erts_mtrace_enabled)
erts_mtrace_crr_free(SEGTYPE, SEGTYPE, c->seg);
- mseg_destroy(mk->ma, mk, c->seg, c->size);
+ destr_seg = c->seg;
+ destr_size = c->size;
+ mseg_destroy(mk->ma, flags, mk, &destr_seg, &destr_size);
+ ASSERT(destr_seg == c->seg);
+ ASSERT(destr_size == c->size);
mseg_cache_clear_node(c);
erts_circleq_push_head(&(mk->cache_free), c);
@@ -749,10 +651,12 @@ static ERTS_INLINE Uint mseg_drop_one_memkind_cache_size(MemKind *mk, cache_t *h
return mk->cache_size;
}
-static ERTS_INLINE Uint mseg_drop_memkind_cache_size(MemKind *mk, cache_t *head) {
+static ERTS_INLINE Uint mseg_drop_memkind_cache_size(MemKind *mk, Uint flags, cache_t *head) {
cache_t *c = NULL;
while (!erts_circleq_is_empty(head)) {
+ void *destr_seg;
+ UWord destr_size;
c = erts_circleq_tail(head);
erts_circleq_remove(c);
@@ -760,7 +664,11 @@ static ERTS_INLINE Uint mseg_drop_memkind_cache_size(MemKind *mk, cache_t *head)
if (erts_mtrace_enabled)
erts_mtrace_crr_free(SEGTYPE, SEGTYPE, c->seg);
- mseg_destroy(mk->ma, mk, c->seg, c->size);
+ destr_seg = c->seg;
+ destr_size = c->size;
+ mseg_destroy(mk->ma, flags, mk, &destr_seg, &destr_size);
+ ASSERT(destr_seg == c->seg);
+ ASSERT(destr_size == c->size);
mseg_cache_clear_node(c);
erts_circleq_push_head(&(mk->cache_free), c);
@@ -788,11 +696,11 @@ static Uint mseg_check_memkind_cache(MemKind *mk) {
for (i = 0; i < CACHE_AREAS; i++) {
if (!erts_circleq_is_empty(&(mk->cache_powered_node[i])))
- return mseg_drop_one_memkind_cache_size(mk, &(mk->cache_powered_node[i]));
+ return mseg_drop_one_memkind_cache_size(mk, ERTS_MSEG_FLG_2POW, &(mk->cache_powered_node[i]));
}
if (!erts_circleq_is_empty(&(mk->cache_unpowered_node)))
- return mseg_drop_one_memkind_cache_size(mk, &(mk->cache_unpowered_node));
+ return mseg_drop_one_memkind_cache_size(mk, ERTS_MSEG_FLG_NONE, &(mk->cache_unpowered_node));
return 0;
}
@@ -851,12 +759,12 @@ static void mseg_clear_memkind_cache(MemKind *mk) {
if (erts_circleq_is_empty(&(mk->cache_powered_node[i])))
continue;
- mseg_drop_memkind_cache_size(mk, &(mk->cache_powered_node[i]));
+ mseg_drop_memkind_cache_size(mk, ERTS_MSEG_FLG_2POW, &(mk->cache_powered_node[i]));
ASSERT(erts_circleq_is_empty(&(mk->cache_powered_node[i])));
}
/* drop varied caches */
if (!erts_circleq_is_empty(&(mk->cache_unpowered_node)))
- mseg_drop_memkind_cache_size(mk, &(mk->cache_unpowered_node));
+ mseg_drop_memkind_cache_size(mk, ERTS_MSEG_FLG_NONE, &(mk->cache_unpowered_node));
ASSERT(erts_circleq_is_empty(&(mk->cache_unpowered_node)));
ASSERT(mk->cache_size == 0);
@@ -896,36 +804,33 @@ static ERTS_INLINE MemKind* memkind(ErtsMsegAllctr_t *ma,
}
static void *
-mseg_alloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, Uint *size_p,
+mseg_alloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, UWord *size_p,
Uint flags, const ErtsMsegOpt_t *opt)
{
- Uint size;
+ UWord size;
void *seg;
MemKind* mk = memkind(ma, opt);
INC_CC(ma, alloc);
- /* Carrier align */
- size = ALIGNED_CEILING(*size_p);
-
- /* Cache optim (if applicable) */
- if (MSEG_FLG_IS_2POW(flags) && !IS_2POW(size))
+ if (!MSEG_FLG_IS_2POW(flags) && !IS_2POW(size))
+ size = ERTS_PAGEALIGNED_CEILING(*size_p);
+ else {
+ size = ALIGNED_CEILING(*size_p);
+ /* Cache optim (if applicable) */
size = ceil_2pow(size);
+ }
-#if CAN_PARTLY_DESTROY
- if (size < ma->min_seg_size)
- ma->min_seg_size = size;
-#endif
-
if (opt->cache && mk->cache_size > 0 && (seg = cache_get_segment(mk, &size, flags)) != NULL)
goto done;
- if ((seg = mseg_create(ma, mk, size)) == NULL)
- size = 0;
+ seg = mseg_create(ma, flags, mk, &size);
+ if (!seg)
+ *size_p = 0;
+ else {
done:
- *size_p = size;
- if (seg) {
+ *size_p = size;
if (erts_mtrace_enabled)
erts_mtrace_crr_alloc(seg, atype, ERTS_MTRACE_SEGMENT_ID, size);
@@ -937,14 +842,16 @@ done:
static void
-mseg_dealloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, void *seg, Uint size,
+mseg_dealloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, void *seg, UWord size,
Uint flags, const ErtsMsegOpt_t *opt)
{
+ void *destr_seg;
+ UWord destr_size;
MemKind* mk = memkind(ma, opt);
ERTS_MSEG_DEALLOC_STAT(mk,size);
- if (opt->cache && cache_bless_segment(mk, seg, size, flags)) {
+ if (opt->cache && cache_bless_segment(mk, seg, (Uint) size, flags)) {
schedule_cache_check(ma);
goto done;
}
@@ -952,7 +859,11 @@ mseg_dealloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, void *seg, Uint size,
if (erts_mtrace_enabled)
erts_mtrace_crr_free(atype, SEGTYPE, seg);
- mseg_destroy(ma, mk, seg, size);
+ destr_seg = seg;
+ destr_size = size;
+ mseg_destroy(ma, flags, mk, &destr_seg, &destr_size);
+ ASSERT(destr_seg == seg);
+ ASSERT(destr_size == size);
done:
@@ -961,11 +872,11 @@ done:
static void *
mseg_realloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, void *seg,
- Uint old_size, Uint *new_size_p, Uint flags, const ErtsMsegOpt_t *opt)
+ UWord old_size, UWord *new_size_p, Uint flags, const ErtsMsegOpt_t *opt)
{
MemKind* mk;
void *new_seg;
- Uint new_size;
+ UWord new_size;
/* Just allocate a new segment if we didn't have one before */
if (!seg || !old_size) {
@@ -985,90 +896,46 @@ mseg_realloc(ErtsMsegAllctr_t *ma, ErtsAlcType_t atype, void *seg,
mk = memkind(ma, opt);
new_seg = seg;
- /* Carrier align */
- new_size = ALIGNED_CEILING(*new_size_p);
- /* Cache optim (if applicable) */
- if (MSEG_FLG_IS_2POW(flags) && !IS_2POW(new_size))
+ if (!MSEG_FLG_IS_2POW(flags))
+ new_size = ERTS_PAGEALIGNED_CEILING(*new_size_p);
+ else {
+ new_size = ALIGNED_CEILING(*new_size_p);
+ /* Cache optim (if applicable) */
new_size = ceil_2pow(new_size);
+ }
- if (new_size == old_size)
- ;
- else if (new_size < old_size) {
- Uint shrink_sz = old_size - new_size;
-
-#if CAN_PARTLY_DESTROY
- if (new_size < ma->min_seg_size)
- ma->min_seg_size = new_size;
-#endif
- /* +M<S>rsbcst <ratio> */
- if (shrink_sz < opt->abs_shrink_th
- && 100*shrink_sz < opt->rel_shrink_th*old_size) {
- new_size = old_size;
+ if (new_size > old_size) {
+ if (opt->preserv) {
+ new_seg = mseg_recreate(ma, flags, mk, (void *) seg, old_size, &new_size);
+ if (!new_seg)
+ new_size = old_size;
}
else {
-
-#if CAN_PARTLY_DESTROY
-
- if (erts_mtrace_enabled)
- erts_mtrace_crr_realloc(new_seg, atype, SEGTYPE, seg, new_size);
-
- mseg_destroy(ma, mk, ((char *) seg) + new_size, shrink_sz);
-
-#elif HAVE_MSEG_RECREATE
- goto do_recreate;
-#else
+ mseg_dealloc(ma, atype, seg, old_size, flags, opt);
new_seg = mseg_alloc(ma, atype, &new_size, flags, opt);
-
- ASSERT(MAP_IS_ALIGNED(new_seg) || !new_seg);
-
if (!new_seg)
- new_size = old_size;
- else {
- sys_memcpy(((char *) new_seg),
- ((char *) seg),
- MIN(new_size, old_size));
- mseg_dealloc(ma, atype, seg, old_size, flags, opt);
- }
-#endif
+ new_size = 0;
}
}
- else {
+ else if (new_size < old_size) {
+ UWord shrink_sz = old_size - new_size;
- if (!opt->preserv) {
- mseg_dealloc(ma, atype, seg, old_size, flags, opt);
- new_seg = mseg_alloc(ma, atype, &new_size, flags, opt);
- ASSERT(MAP_IS_ALIGNED(new_seg) || !new_seg);
+ /* +M<S>rsbcst <ratio> */
+ if (shrink_sz < opt->abs_shrink_th
+ && 100*shrink_sz < opt->rel_shrink_th*old_size) {
+ new_size = old_size;
}
else {
-#if HAVE_MSEG_RECREATE
-#if !CAN_PARTLY_DESTROY
- do_recreate:
-#endif
- new_seg = mseg_recreate(ma, mk, (void *) seg, old_size, new_size);
- /* ASSERT(MAP_IS_ALIGNED(new_seg) || !new_seg);
- * will not always be aligned and it ok for now
- */
-
- if (erts_mtrace_enabled)
- erts_mtrace_crr_realloc(new_seg, atype, SEGTYPE, seg, new_size);
+ new_seg = mseg_recreate(ma, flags, mk, (void *) seg, old_size, &new_size);
if (!new_seg)
new_size = old_size;
-#else
- new_seg = mseg_alloc(ma, atype, &new_size, flags, opt);
-
- ASSERT(MAP_IS_ALIGNED(new_seg) || !new_seg);
-
- if (!new_seg)
- new_size = old_size;
- else {
- sys_memcpy(((char *) new_seg), ((char *) seg), MIN(new_size, old_size));
- mseg_dealloc(ma, atype, seg, old_size, flags, opt);
- }
-#endif
}
}
+ if (erts_mtrace_enabled)
+ erts_mtrace_crr_realloc(new_seg, atype, SEGTYPE, seg, new_size);
+
INC_CC(ma, realloc);
ASSERT(!MSEG_FLG_IS_2POW(flags) || IS_2POW(new_size));
@@ -1106,9 +973,7 @@ static struct {
Eterm mseg_create;
Eterm mseg_create_resize;
Eterm mseg_destroy;
-#if HAVE_MSEG_RECREATE
Eterm mseg_recreate;
-#endif
Eterm mseg_clear_cache;
Eterm mseg_check_cache;
@@ -1163,9 +1028,7 @@ init_atoms(ErtsMsegAllctr_t *ma)
AM_INIT(mseg_create);
AM_INIT(mseg_create_resize);
AM_INIT(mseg_destroy);
-#if HAVE_MSEG_RECREATE
AM_INIT(mseg_recreate);
-#endif
AM_INIT(mseg_clear_cache);
AM_INIT(mseg_check_cache);
@@ -1293,9 +1156,7 @@ info_calls(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg, Uint **hpp
PRINT_CC(to, arg, create);
PRINT_CC(to, arg, create_resize);
PRINT_CC(to, arg, destroy);
-#if HAVE_MSEG_RECREATE
PRINT_CC(to, arg, recreate);
-#endif
PRINT_CC(to, arg, clear_cache);
PRINT_CC(to, arg, check_cache);
@@ -1316,12 +1177,10 @@ info_calls(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg, Uint **hpp
bld_unstable_uint(hpp, szp, ma->calls.clear_cache.giga_no),
bld_unstable_uint(hpp, szp, ma->calls.clear_cache.no));
-#if HAVE_MSEG_RECREATE
add_3tup(hpp, szp, &res,
am.mseg_recreate,
bld_unstable_uint(hpp, szp, ma->calls.recreate.giga_no),
bld_unstable_uint(hpp, szp, ma->calls.recreate.no));
-#endif
add_3tup(hpp, szp, &res,
am.mseg_destroy,
bld_unstable_uint(hpp, szp, ma->calls.destroy.giga_no),
@@ -1521,7 +1380,7 @@ erts_mseg_info(int ix,
}
void *
-erts_mseg_alloc_opt(ErtsAlcType_t atype, Uint *size_p, Uint flags, const ErtsMsegOpt_t *opt)
+erts_mseg_alloc_opt(ErtsAlcType_t atype, UWord *size_p, Uint flags, const ErtsMsegOpt_t *opt)
{
ErtsMsegAllctr_t *ma = ERTS_MSEG_ALLCTR_OPT(opt);
void *seg;
@@ -1533,14 +1392,14 @@ erts_mseg_alloc_opt(ErtsAlcType_t atype, Uint *size_p, Uint flags, const ErtsMse
}
void *
-erts_mseg_alloc(ErtsAlcType_t atype, Uint *size_p, Uint flags)
+erts_mseg_alloc(ErtsAlcType_t atype, UWord *size_p, Uint flags)
{
return erts_mseg_alloc_opt(atype, size_p, flags, &erts_mseg_default_opt);
}
void
erts_mseg_dealloc_opt(ErtsAlcType_t atype, void *seg,
- Uint size, Uint flags, const ErtsMsegOpt_t *opt)
+ UWord size, Uint flags, const ErtsMsegOpt_t *opt)
{
ErtsMsegAllctr_t *ma = ERTS_MSEG_ALLCTR_OPT(opt);
ERTS_MSEG_LOCK(ma);
@@ -1550,14 +1409,14 @@ erts_mseg_dealloc_opt(ErtsAlcType_t atype, void *seg,
}
void
-erts_mseg_dealloc(ErtsAlcType_t atype, void *seg, Uint size, Uint flags)
+erts_mseg_dealloc(ErtsAlcType_t atype, void *seg, UWord size, Uint flags)
{
erts_mseg_dealloc_opt(atype, seg, size, flags, &erts_mseg_default_opt);
}
void *
erts_mseg_realloc_opt(ErtsAlcType_t atype, void *seg,
- Uint old_size, Uint *new_size_p,
+ UWord old_size, UWord *new_size_p,
Uint flags,
const ErtsMsegOpt_t *opt)
{
@@ -1572,7 +1431,7 @@ erts_mseg_realloc_opt(ErtsAlcType_t atype, void *seg,
void *
erts_mseg_realloc(ErtsAlcType_t atype, void *seg,
- Uint old_size, Uint *new_size_p, Uint flags)
+ UWord old_size, UWord *new_size_p, Uint flags)
{
return erts_mseg_realloc_opt(atype, seg, old_size, new_size_p,
flags, &erts_mseg_default_opt);
@@ -1662,19 +1521,16 @@ erts_mseg_init(ErtsMsegInit_t *init)
erts_mtx_init(&init_atoms_mutex, "mseg_init_atoms");
-#if HAVE_MMAP && !defined(MAP_ANON)
- mmap_fd = open("/dev/zero", O_RDWR);
- if (mmap_fd < 0)
- erl_exit(ERTS_ABORT_EXIT, "erts_mseg: unable to open /dev/zero\n");
+#if HALFWORD_HEAP
+ if (sizeof(void *) != 8)
+ erl_exit(-1,"Halfword emulator cannot be run in 32bit mode");
+
+ init->mmap.virtual_range.start = (char *) sbrk(0);
+ init->mmap.virtual_range.end = (char *) 0x100000000UL;
+ init->mmap.sco = 0;
#endif
-#if HAVE_MMAP
-# if HALFWORD_HEAP
- initialize_pmmap();
-# else
erts_mmap_init(&init->mmap);
-# endif
-#endif
if (!IS_2POW(GET_PAGE_SIZE))
erl_exit(ERTS_ABORT_EXIT, "erts_mseg: Unexpected page_size %beu\n", GET_PAGE_SIZE);
@@ -1716,10 +1572,6 @@ erts_mseg_init(ErtsMsegInit_t *init)
#endif
sys_memzero((void *) &ma->calls, sizeof(ErtsMsegCalls));
-
-#if CAN_PARTLY_DESTROY
- ma->min_seg_size = ~((Uint) 0);
-#endif
}
}
@@ -1761,7 +1613,7 @@ erts_mseg_test(UWord op, UWord a1, UWord a2, UWord a3)
case 0x400: /* Have erts_mseg */
return (UWord) 1;
case 0x401:
- return (UWord) erts_mseg_alloc(ERTS_ALC_A_INVALID, (Uint *) a1, (Uint) 0);
+ return (UWord) erts_mseg_alloc(ERTS_ALC_A_INVALID, (UWord *) a1, (Uint) 0);
case 0x402:
erts_mseg_dealloc(ERTS_ALC_A_INVALID, (void *) a1, (Uint) a2, (Uint) 0);
return (UWord) 0;
@@ -1769,7 +1621,7 @@ erts_mseg_test(UWord op, UWord a1, UWord a2, UWord a3)
return (UWord) erts_mseg_realloc(ERTS_ALC_A_INVALID,
(void *) a1,
(Uint) a2,
- (Uint *) a3,
+ (UWord *) a3,
(Uint) 0);
case 0x404:
erts_mseg_clear_cache();
@@ -1792,405 +1644,3 @@ erts_mseg_test(UWord op, UWord a1, UWord a2, UWord a3)
}
}
-
-
-#if HALFWORD_HEAP
-/*
- * Very simple page oriented mmap replacer. Works in the lower
- * 32 bit address range of a 64bit program.
- * Implements anonymous mmap mremap and munmap with address order first fit.
- * The free list is expected to be very short...
- * To be used for compressed pointers in Erlang halfword emulator
- * implementation. The MacOS X version is more of a toy, it's not really
- * for production as the halfword erlang VM relies on Linux specific memory
- * mapping tricks.
- */
-
-/* #define HARDDEBUG 1 */
-
-#ifdef HARDDEBUG
-static void dump_freelist(void)
-{
- FreeBlock *p = first;
-
- while (p) {
- fprintf(stderr, "p = %p\r\np->num = %ld\r\np->next = %p\r\n\r\n",
- (void *) p, (unsigned long) p->num, (void *) p->next);
- p = p->next;
- }
-}
-
-#define HARDDEBUG_HW_INCOMPLETE_ALIGNMENT(PTR, SZ) \
- fprintf(stderr,"Mapping of address %p with size %ld " \
- "does not map complete pages (%s:%d)\r\n", \
- (void *) (PTR), (unsigned long) (SZ),__FILE__, __LINE__)
-
-#define HARDDEBUG_HW_UNALIGNED_ALIGNMENT(PTR, SZ) \
- fprintf(stderr,"Mapping of address %p with size %ld " \
- "is not page aligned (%s:%d)\r\n", \
- (void *) (PTR), (unsigned long) (SZ),__FILE__, __LINE__)
-
-#define HARDDEBUG_MAP_FAILED(PTR, SZ) \
- fprintf(stderr, "Could not actually map memory " \
- "at address %p with size %ld (%s:%d) ..\r\n", \
- (void *) (PTR), (unsigned long) (SZ),__FILE__, __LINE__)
-#else
-#define HARDDEBUG_HW_INCOMPLETE_ALIGNMENT(PTR, SZ) do{}while(0)
-#define HARDDEBUG_HW_UNALIGNED_ALIGNMENT(PTR, SZ) do{}while(0)
-#define HARDDEBUG_MAP_FAILED(PTR, SZ) do{}while(0)
-#endif
-
-
-#ifdef __APPLE__
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-
-#define INIT_LOCK() do {erts_mtx_init(&pmmap_mutex, "pmmap");} while(0)
-
-#define TAKE_LOCK() do {erts_mtx_lock(&pmmap_mutex);} while(0)
-
-#define RELEASE_LOCK() do {erts_mtx_unlock(&pmmap_mutex);} while(0)
-
-static erts_mtx_t pmmap_mutex; /* Also needed when !USE_THREADS */
-
-typedef struct _free_block {
- unsigned long num; /*pages*/
- struct _free_block *next;
-} FreeBlock;
-
-/* Protect with lock */
-static FreeBlock *first;
-
-static void *do_map(void *ptr, size_t sz)
-{
- void *res;
-
- if (ALIGNED_CEILING(sz) != sz) {
- HARDDEBUG_HW_INCOMPLETE_ALIGNMENT(ptr, sz);
- return NULL;
- }
-
- if (((unsigned long) ptr) % MSEG_ALIGNED_SIZE) {
- HARDDEBUG_HW_UNALIGNED_ALIGNMENT(ptr, sz);
- return NULL;
- }
-
-#if HAVE_MMAP
- res = mmap(ptr, sz,
- PROT_READ | PROT_WRITE, MAP_PRIVATE |
- MAP_ANONYMOUS | MAP_FIXED,
- -1 , 0);
-#else
-# error "Missing mmap support"
-#endif
-
- if (res == MAP_FAILED) {
- HARDDEBUG_MAP_FAILED(ptr, sz);
- return NULL;
- }
-
- return res;
-}
-
-static int do_unmap(void *ptr, size_t sz)
-{
- void *res;
-
- if (ALIGNED_CEILING(sz) != sz) {
- HARDDEBUG_HW_INCOMPLETE_ALIGNMENT(ptr, sz);
- return 1;
- }
-
- if (((unsigned long) ptr) % MSEG_ALIGNED_SIZE) {
- HARDDEBUG_HW_UNALIGNED_ALIGNMENT(ptr, sz);
- return 1;
- }
-
- res = mmap(ptr, sz,
- PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE | MAP_FIXED,
- -1 , 0);
-
- if (res == MAP_FAILED) {
- HARDDEBUG_MAP_FAILED(ptr, sz);
- return 1;
- }
-
- return 0;
-}
-
-#ifdef __APPLE__
-/*
- * The first 4 gig's are protected on Macos X for 64bit processes :(
- * The range 0x1000000000 - 0x10FFFFFFFF is selected as an arbitrary
- * value of a normally unused range... Real MMAP's will avoid
- * it and all 32bit compressed pointers can be in that range...
- * More expensive than on Linux where expansion of compressed
- * poiters involves no masking (as they are in the first 4 gig's).
- * It's also very uncertain if the MAP_NORESERVE flag really has
- * any effect in MacOS X. Swap space may always be allocated...
- */
-#define SET_RANGE_MIN() /* nothing */
-#define RANGE_MIN 0x1000000000UL
-#define RANGE_MAX 0x1100000000UL
-#define RANGE_MASK (RANGE_MIN)
-#define EXTRA_MAP_FLAGS (MAP_FIXED)
-#else
-static size_t range_min;
-#define SET_RANGE_MIN() do { range_min = (size_t) sbrk(0); } while (0)
-#define RANGE_MIN range_min
-#define RANGE_MAX 0x100000000UL
-#define RANGE_MASK 0UL
-#define EXTRA_MAP_FLAGS (0)
-#endif
-
-static int initialize_pmmap(void)
-{
- char *p,*q,*rptr;
- size_t rsz;
- FreeBlock *initial;
-
- SET_RANGE_MIN();
- if (sizeof(void *) != 8) {
- erl_exit(1,"Halfword emulator cannot be run in 32bit mode");
- }
-
- p = (char *) RANGE_MIN;
- q = (char *) RANGE_MAX;
-
- rsz = ALIGNED_FLOOR(q - p);
-
- rptr = mmap_align(NULL, (void *) p, rsz,
- PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS |
- MAP_NORESERVE | EXTRA_MAP_FLAGS,
- -1 , 0);
-#ifdef HARDDEBUG
- printf("p=%p, rsz = %ld, pages = %ld, got range = %p -> %p\r\n",
- p, (unsigned long) rsz, (unsigned long) (rsz / MSEG_ALIGNED_SIZE),
- (void *) rptr, (void*)(rptr + rsz));
-#endif
- if ((UWord)(rptr + rsz) > RANGE_MAX) {
- size_t rsz_trunc = RANGE_MAX - (UWord)rptr;
-#ifdef HARDDEBUG
- printf("Reducing mmap'ed memory from %lu to %lu Mb, reduced range = %p -> %p\r\n",
- rsz/(1024*1024), rsz_trunc/(1024*1024), rptr, rptr+rsz_trunc);
-#endif
- munmap((void*)RANGE_MAX, rsz - rsz_trunc);
- rsz = rsz_trunc;
- }
- if (!do_map(rptr, MSEG_ALIGNED_SIZE)) {
- erl_exit(1,"Could not actually mmap first page for halfword emulator...\n");
- }
- initial = (FreeBlock *) rptr;
- initial->num = (rsz / MSEG_ALIGNED_SIZE);
- initial->next = NULL;
- first = initial;
- INIT_LOCK();
- return 0;
-}
-
-static void *pmmap(size_t size)
-{
- size_t real_size = ALIGNED_CEILING(size);
- size_t num_pages = real_size / MSEG_ALIGNED_SIZE;
- FreeBlock **block;
- FreeBlock *tail;
- FreeBlock *res;
-
- TAKE_LOCK();
-
- for (block = &first;
- *block != NULL && (*block)->num < num_pages;
- block = &((*block)->next))
- ;
- if (!(*block)) {
- RELEASE_LOCK();
- return NULL;
- }
- if ((*block)->num == num_pages) {
- /* nice, perfect fit */
- res = *block;
- *block = (*block)->next;
- } else {
- tail = (FreeBlock *) (((char *) ((void *) (*block))) + real_size);
- if (!do_map(tail, MSEG_ALIGNED_SIZE)) {
- HARDDEBUG_MAP_FAILED(tail, MSEG_ALIGNED_SIZE);
- RELEASE_LOCK();
- return NULL;
- }
- tail->num = (*block)->num - num_pages;
- tail->next = (*block)->next;
- res = *block;
- *block = tail;
- }
-
- RELEASE_LOCK();
-
- if (!do_map(res, real_size)) {
- HARDDEBUG_MAP_FAILED(res, real_size);
- return NULL;
- }
-
- return (void *) res;
-}
-
-static int pmunmap(void *p, size_t size)
-{
- size_t real_size = ALIGNED_CEILING(size);
- size_t num_pages = real_size / MSEG_ALIGNED_SIZE;
-
- FreeBlock *block;
- FreeBlock *last;
- FreeBlock *nb = (FreeBlock *) p;
-
- ASSERT(((unsigned long)p & CHECK_POINTER_MASK)==0);
-
- if (real_size > MSEG_ALIGNED_SIZE) {
- if (do_unmap(((char *) p) + MSEG_ALIGNED_SIZE, real_size - MSEG_ALIGNED_SIZE)) {
- return 1;
- }
- }
-
- TAKE_LOCK();
-
- last = NULL;
- block = first;
- while(block != NULL && ((void *) block) < p) {
- last = block;
- block = block->next;
- }
-
- if (block != NULL &&
- ((void *) block) == ((void *) (((char *) p) + real_size))) {
- /* Merge new free block with following */
- nb->num = block->num + num_pages;
- nb->next = block->next;
- if (do_unmap(block, MSEG_ALIGNED_SIZE)) {
- RELEASE_LOCK();
- return 1;
- }
- } else {
- /* just link in */
- nb->num = num_pages;
- nb->next = block;
- }
- if (last != NULL) {
- if (p == ((void *) (((char *) last) + (last->num * MSEG_ALIGNED_SIZE)))) {
- /* Merge with previous */
- last->num += nb->num;
- last->next = nb->next;
- if (do_unmap(nb, MSEG_ALIGNED_SIZE)) {
- RELEASE_LOCK();
- return 1;
- }
- } else {
- last->next = nb;
- }
- } else {
- first = nb;
- }
- RELEASE_LOCK();
- return 0;
-}
-
-static void *pmremap(void *old_address, size_t old_size,
- size_t new_size)
-{
- size_t new_real_size = ALIGNED_CEILING(new_size);
- size_t new_num_pages = new_real_size / MSEG_ALIGNED_SIZE;
- size_t old_real_size = ALIGNED_CEILING(old_size);
- size_t old_num_pages = old_real_size / MSEG_ALIGNED_SIZE;
- if (new_num_pages == old_num_pages) {
- return old_address;
- } else if (new_num_pages < old_num_pages) { /* Shrink */
- size_t nfb_pages = old_num_pages - new_num_pages;
- size_t nfb_real_size = old_real_size - new_real_size;
- void *vnfb = (void *) (((char *)old_address) + new_real_size);
- FreeBlock *nfb = (FreeBlock *) vnfb;
- FreeBlock **block;
- TAKE_LOCK();
- for (block = &first;
- *block != NULL && (*block) < nfb;
- block = &((*block)->next))
- ;
- if (!(*block) ||
- (*block) > ((FreeBlock *)(((char *) vnfb) + nfb_real_size))) {
- /* Normal link in */
- if (nfb_pages > 1) {
- if (do_unmap((void *)(((char *) vnfb) + MSEG_ALIGNED_SIZE),
- (nfb_pages - 1)*MSEG_ALIGNED_SIZE)) {
- return NULL;
- }
- }
- nfb->next = (*block);
- nfb->num = nfb_pages;
- (*block) = nfb;
- } else { /* block merge */
- nfb->next = (*block)->next;
- nfb->num = nfb_pages + (*block)->num;
- /* unmap also the first page of the next freeblock */
- (*block) = nfb;
- if (do_unmap((void *)(((char *) vnfb) + MSEG_ALIGNED_SIZE),
- nfb_pages*MSEG_ALIGNED_SIZE)) {
- return NULL;
- }
- }
- RELEASE_LOCK();
- return old_address;
- } else { /* Enlarge */
- FreeBlock **block;
- void *old_end = (void *) (((char *)old_address) + old_real_size);
- TAKE_LOCK();
- for (block = &first;
- *block != NULL && (*block) < (FreeBlock *) old_address;
- block = &((*block)->next))
- ;
- if ((*block) == NULL || old_end > ((void *) RANGE_MAX) ||
- (*block) != old_end ||
- (*block)->num < (new_num_pages - old_num_pages)) {
- /* cannot extend */
- void *result;
- RELEASE_LOCK();
- result = pmmap(new_size);
- if (result == NULL) {
- return NULL;
- }
- memcpy(result,old_address,old_size);
- if (pmunmap(old_address,old_size)) {
- /* Oups... */
- pmunmap(result,new_size);
- return NULL;
- }
- return result;
- } else { /* extend */
- size_t remaining_pages = (*block)->num -
- (new_num_pages - old_num_pages);
- if (!remaining_pages) {
- void *p = (void *) (((char *) (*block)) + MSEG_ALIGNED_SIZE);
- void *n = (*block)->next;
- size_t x = ((*block)->num - 1) * MSEG_ALIGNED_SIZE;
- if (x > 0) {
- if (do_map(p,x) == NULL) {
- RELEASE_LOCK();
- return NULL;
- }
- }
- (*block) = n;
- } else {
- FreeBlock *nfb = (FreeBlock *) ((void *)
- (((char *) old_address) +
- new_real_size));
- void *p = (void *) (((char *) (*block)) + MSEG_ALIGNED_SIZE);
- if (do_map(p,new_real_size - old_real_size) == NULL) {
- RELEASE_LOCK();
- return NULL;
- }
- nfb->num = remaining_pages;
- nfb->next = (*block)->next;
- (*block) = nfb;
- }
- RELEASE_LOCK();
- return old_address;
- }
- }
-}
-#endif /* HALFWORD_HEAP */
diff --git a/erts/emulator/sys/common/erl_mseg.h b/erts/emulator/sys/common/erl_mseg.h
index 7454e5c473..2284b3f8f1 100644
--- a/erts/emulator/sys/common/erl_mseg.h
+++ b/erts/emulator/sys/common/erl_mseg.h
@@ -24,14 +24,14 @@
#include "erl_alloc_types.h"
#include "erl_mmap.h"
-#ifndef HAVE_MMAP
-# define HAVE_MMAP 0
-#endif
-#ifndef HAVE_MREMAP
-# define HAVE_MREMAP 0
-#endif
-
-#if HAVE_MMAP
+/*
+ * We currently only enable mseg_alloc if we got
+ * a genuine mmap()/munmap() primitive. It is possible
+ * to utilize erts_mmap() withiout a mmap support but
+ * alloc_util needs to be prepared before we can do
+ * that.
+ */
+#ifdef ERTS_HAVE_GENUINE_OS_MMAP
# define HAVE_ERTS_MSEG 1
# define ERTS_HAVE_MSEG_SUPER_ALIGNED 1
#else
@@ -40,8 +40,7 @@
#endif
#if ERTS_HAVE_MSEG_SUPER_ALIGNED
-# define MSEG_ALIGN_BITS (18)
- /* Affects hard limits for sbct and lmbcs documented in erts_alloc.xml */
+# define MSEG_ALIGN_BITS ERTS_MMAP_SUPERALIGNED_BITS
#else
/* If we don't use super aligned multiblock carriers
* we will mmap with page size alignment (and thus use corresponding
@@ -77,7 +76,8 @@ typedef struct {
4*1024*1024, /* amcbf: Absolute max cache bad fit */ \
20, /* rmcbf: Relative max cache bad fit */ \
10, /* mcs: Max cache size */ \
- 1000 /* cci: Cache check interval */ \
+ 1000, /* cci: Cache check interval */ \
+ ERTS_MMAP_INIT_DEFAULT_INITER \
}
typedef struct {
@@ -93,12 +93,12 @@ typedef struct {
extern const ErtsMsegOpt_t erts_mseg_default_opt;
-void *erts_mseg_alloc(ErtsAlcType_t, Uint *, Uint);
-void *erts_mseg_alloc_opt(ErtsAlcType_t, Uint *, Uint, const ErtsMsegOpt_t *);
-void erts_mseg_dealloc(ErtsAlcType_t, void *, Uint, Uint);
-void erts_mseg_dealloc_opt(ErtsAlcType_t, void *, Uint, Uint, const ErtsMsegOpt_t *);
-void *erts_mseg_realloc(ErtsAlcType_t, void *, Uint, Uint *, Uint);
-void *erts_mseg_realloc_opt(ErtsAlcType_t, void *, Uint, Uint *, Uint, const ErtsMsegOpt_t *);
+void *erts_mseg_alloc(ErtsAlcType_t, UWord *, Uint);
+void *erts_mseg_alloc_opt(ErtsAlcType_t, UWord *, Uint, const ErtsMsegOpt_t *);
+void erts_mseg_dealloc(ErtsAlcType_t, void *, UWord, Uint);
+void erts_mseg_dealloc_opt(ErtsAlcType_t, void *, UWord, Uint, const ErtsMsegOpt_t *);
+void *erts_mseg_realloc(ErtsAlcType_t, void *, UWord, UWord *, Uint);
+void *erts_mseg_realloc_opt(ErtsAlcType_t, void *, UWord, UWord *, Uint, const ErtsMsegOpt_t *);
void erts_mseg_clear_cache(void);
void erts_mseg_cache_check(void);
Uint erts_mseg_no( const ErtsMsegOpt_t *);