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-rw-r--r--erts/emulator/beam/erl_alloc_util.c23
-rw-r--r--erts/emulator/beam/erl_alloc_util.h112
2 files changed, 69 insertions, 66 deletions
diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c
index 230ca6ccbb..f0597e778a 100644
--- a/erts/emulator/beam/erl_alloc_util.c
+++ b/erts/emulator/beam/erl_alloc_util.c
@@ -2083,27 +2083,14 @@ handle_delayed_dealloc(Allctr_t *allctr,
res = 1;
blk = UMEM2BLK(ptr);
- if (IS_FREE_LAST_MBC_BLK(blk)) {
+ if (blk->bhdr == HOMECOMING_MBC_BLK_HDR) {
/*
* A multiblock carrier that previously has been migrated away
* from us and now is back to be deallocated. For more info
* see schedule_dealloc_carrier().
- *
- * Note that we cannot use FBLK_TO_MBC(blk) since it
- * data has been overwritten by the queue.
*/
- Carrier_t *crr = FIRST_BLK_TO_MBC(allctr, blk);
-
- /* Restore word overwritten by the dd-queue as it will be read
- * if this carrier is pulled from dc_list by cpool_fetch()
- */
- ERTS_ALC_CPOOL_ASSERT(FBLK_TO_MBC(blk) != crr);
- ERTS_CT_ASSERT(sizeof(ErtsAllctrDDBlock_t) == sizeof(void*));
-#ifdef MBC_ABLK_OFFSET_BITS
- blk->u.carrier = crr;
-#else
- blk->carrier = crr;
-#endif
+ Carrier_t *crr = ErtsContainerStruct(blk, Carrier_t,
+ cpool.homecoming_dd.blk);
ERTS_ALC_CPOOL_ASSERT(ERTS_ALC_IS_CPOOL_ENABLED(allctr));
ERTS_ALC_CPOOL_ASSERT(allctr == crr->cpool.orig_allctr);
@@ -2116,6 +2103,7 @@ handle_delayed_dealloc(Allctr_t *allctr,
schedule_dealloc_carrier(allctr, crr);
}
else {
+ ASSERT(IS_SBC_BLK(blk) || !IS_FREE_BLK(blk));
INC_CC(allctr->calls.this_free);
@@ -3543,6 +3531,8 @@ schedule_dealloc_carrier(Allctr_t *allctr, Carrier_t *crr)
== (erts_smp_atomic_read_nob(&crr->allctr)
& ~ERTS_CRR_ALCTR_FLG_MASK));
+ blk = &crr->cpool.homecoming_dd.blk;
+ ERTS_ALC_CPOOL_ASSERT(blk->bhdr == HOMECOMING_MBC_BLK_HDR);
if (ddq_enqueue(&orig_allctr->dd.q, BLK2UMEM(blk), cinit))
erts_alloc_notify_delayed_dealloc(orig_allctr->ix);
return;
@@ -3581,6 +3571,7 @@ schedule_dealloc_carrier(Allctr_t *allctr, Carrier_t *crr)
static ERTS_INLINE void
cpool_init_carrier_data(Allctr_t *allctr, Carrier_t *crr)
{
+ crr->cpool.homecoming_dd.blk.bhdr = HOMECOMING_MBC_BLK_HDR;
erts_atomic_init_nob(&crr->cpool.next, ERTS_AINT_NULL);
erts_atomic_init_nob(&crr->cpool.prev, ERTS_AINT_NULL);
crr->cpool.orig_allctr = allctr;
diff --git a/erts/emulator/beam/erl_alloc_util.h b/erts/emulator/beam/erl_alloc_util.h
index 81180382af..1291a6c10e 100644
--- a/erts/emulator/beam/erl_alloc_util.h
+++ b/erts/emulator/beam/erl_alloc_util.h
@@ -305,45 +305,7 @@ void erts_alcu_literal_32_sys_dealloc(Allctr_t*, void *ptr, Uint size, int supe
typedef union {char c[ERTS_ALLOC_ALIGN_BYTES]; long l; double d;} Unit_t;
-#ifdef ERTS_SMP
-
-typedef struct ErtsDoubleLink_t_ {
- struct ErtsDoubleLink_t_ *next;
- struct ErtsDoubleLink_t_ *prev;
-}ErtsDoubleLink_t;
-
-typedef struct {
- erts_atomic_t next;
- erts_atomic_t prev;
- Allctr_t *orig_allctr; /* read-only while carrier is alive */
- ErtsThrPrgrVal thr_prgr;
- erts_atomic_t max_size;
- UWord abandon_limit;
- UWord blocks;
- UWord blocks_size;
- ErtsDoubleLink_t abandoned; /* node in pooled_list or traitor_list */
-} ErtsAlcCPoolData_t;
-
-#endif
-
typedef struct Carrier_t_ Carrier_t;
-struct Carrier_t_ {
- UWord chdr;
- Carrier_t *next;
- Carrier_t *prev;
- erts_smp_atomic_t allctr;
-#ifdef ERTS_SMP
- ErtsAlcCPoolData_t cpool; /* Overwritten by block if sbc */
-#endif
-};
-
-#define ERTS_ALC_CARRIER_TO_ALLCTR(C) \
- ((Allctr_t *) (erts_smp_atomic_read_nob(&(C)->allctr) & ~FLG_MASK))
-
-typedef struct {
- Carrier_t *first;
- Carrier_t *last;
-} CarrierList_t;
typedef struct {
UWord bhdr;
@@ -357,6 +319,22 @@ typedef struct {
#endif
} Block_t;
+typedef union ErtsAllctrDDBlock_t_ ErtsAllctrDDBlock_t;
+
+union ErtsAllctrDDBlock_t_ {
+ erts_atomic_t atmc_next;
+ ErtsAllctrDDBlock_t *ptr_next;
+};
+
+typedef struct {
+ Block_t blk;
+#if !MBC_ABLK_OFFSET_BITS
+ ErtsAllctrDDBlock_t umem_;
+#endif
+} ErtsFakeDDBlock_t;
+
+
+
#define THIS_FREE_BLK_HDR_FLG (((UWord) 1) << 0)
#define PREV_FREE_BLK_HDR_FLG (((UWord) 1) << 1)
#define LAST_BLK_HDR_FLG (((UWord) 1) << 2)
@@ -365,14 +343,13 @@ typedef struct {
(THIS_FREE_BLK_HDR_FLG | PREV_FREE_BLK_HDR_FLG | LAST_BLK_HDR_FLG)
/*
- * FREE_LAST_MBC_BLK_HDR_FLGS is a special flag combo used for
- * distinguishing empty mbc's from allocated blocks in
- * handle_delayed_dealloc().
+ * HOMECOMING_MBC_BLK_HDR is a special block header combo used for
+ * distinguishing MBC's from allocated blocks in handle_delayed_dealloc().
*/
-#define FREE_LAST_MBC_BLK_HDR_FLGS (THIS_FREE_BLK_HDR_FLG | LAST_BLK_HDR_FLG)
+#define HOMECOMING_MBC_BLK_HDR (THIS_FREE_BLK_HDR_FLG | LAST_BLK_HDR_FLG)
#define IS_FREE_LAST_MBC_BLK(B) \
- (((B)->bhdr & FLG_MASK) == FREE_LAST_MBC_BLK_HDR_FLGS)
+ (((B)->bhdr & FLG_MASK) == (THIS_FREE_BLK_HDR_FLG | LAST_BLK_HDR_FLG))
#define IS_SBC_BLK(B) (((B)->bhdr & FLG_MASK) == SBC_BLK_HDR_FLG)
#define IS_MBC_BLK(B) (!IS_SBC_BLK((B)))
@@ -396,6 +373,48 @@ typedef struct {
typedef UWord FreeBlkFtr_t; /* Footer of a free block */
+
+#ifdef ERTS_SMP
+
+typedef struct ErtsDoubleLink_t_ {
+ struct ErtsDoubleLink_t_ *next;
+ struct ErtsDoubleLink_t_ *prev;
+}ErtsDoubleLink_t;
+
+typedef struct {
+ ErtsFakeDDBlock_t homecoming_dd;
+ erts_atomic_t next;
+ erts_atomic_t prev;
+ Allctr_t *orig_allctr; /* read-only while carrier is alive */
+ ErtsThrPrgrVal thr_prgr;
+ erts_atomic_t max_size;
+ UWord abandon_limit;
+ UWord blocks;
+ UWord blocks_size;
+ ErtsDoubleLink_t abandoned; /* node in pooled_list or traitor_list */
+} ErtsAlcCPoolData_t;
+
+#endif
+
+struct Carrier_t_ {
+ UWord chdr;
+ Carrier_t *next;
+ Carrier_t *prev;
+ erts_smp_atomic_t allctr;
+#ifdef ERTS_SMP
+ ErtsAlcCPoolData_t cpool; /* Overwritten by block if sbc */
+#endif
+};
+
+#define ERTS_ALC_CARRIER_TO_ALLCTR(C) \
+ ((Allctr_t *) (erts_smp_atomic_read_nob(&(C)->allctr) & ~FLG_MASK))
+
+typedef struct {
+ Carrier_t *first;
+ Carrier_t *last;
+} CarrierList_t;
+
+
typedef Uint64 CallCounter_t;
typedef struct {
@@ -433,13 +452,6 @@ typedef struct {
#ifdef ERTS_SMP
-typedef union ErtsAllctrDDBlock_t_ ErtsAllctrDDBlock_t;
-
-union ErtsAllctrDDBlock_t_ {
- erts_atomic_t atmc_next;
- ErtsAllctrDDBlock_t *ptr_next;
-};
-
typedef struct {
ErtsAllctrDDBlock_t marker;
erts_atomic_t last;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 12:58:05 +0000