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-rw-r--r--erts/emulator/beam/erl_alloc_util.c129
-rw-r--r--erts/emulator/beam/erl_sched_spec_pre_alloc.c113
-rw-r--r--erts/emulator/beam/erl_sched_spec_pre_alloc.h5
3 files changed, 158 insertions, 89 deletions
diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c
index a0abd1c405..97ba306a79 100644
--- a/erts/emulator/beam/erl_alloc_util.c
+++ b/erts/emulator/beam/erl_alloc_util.c
@@ -829,46 +829,83 @@ init_dd_queue(ErtsAllctrDDQueue_t *ddq)
ddq->head.used_marker = 1;
}
-static ERTS_INLINE erts_aint_t
-ddq_managed_thread_enqueue(ErtsAllctrDDQueue_t *ddq, void *ptr)
+static ERTS_INLINE int
+ddq_managed_thread_enqueue(ErtsAllctrDDQueue_t *ddq, void *ptr, int cinit)
{
- erts_aint_t ilast, itmp;
- ErtsAllctrDDBlock_t *this = ptr;
+ erts_aint_t itmp;
+ ErtsAllctrDDBlock_t *enq, *this = ptr;
erts_atomic_init_nob(&this->atmc_next, ERTS_AINT_NULL);
-
/* Enqueue at end of list... */
- ilast = erts_atomic_read_nob(&ddq->tail.data.last);
- while (1) {
- ErtsAllctrDDBlock_t *last = (ErtsAllctrDDBlock_t *) ilast;
- itmp = erts_atomic_cmpxchg_mb(&last->atmc_next,
- (erts_aint_t) this,
- ERTS_AINT_NULL);
- if (itmp == ERTS_AINT_NULL)
- break;
- ilast = itmp;
+ enq = (ErtsAllctrDDBlock_t *) erts_atomic_read_nob(&ddq->tail.data.last);
+ itmp = erts_atomic_cmpxchg_relb(&enq->atmc_next,
+ (erts_aint_t) this,
+ ERTS_AINT_NULL);
+ if (itmp == ERTS_AINT_NULL) {
+ /* We are required to move last pointer */
+#ifdef DEBUG
+ ASSERT(ERTS_AINT_NULL == erts_atomic_read_nob(&this->atmc_next));
+ ASSERT(((erts_aint_t) enq)
+ == erts_atomic_xchg_relb(&ddq->tail.data.last,
+ (erts_aint_t) this));
+#else
+ erts_atomic_set_relb(&ddq->tail.data.last, (erts_aint_t) this);
+#endif
+ return 1;
}
+ else {
+ /*
+ * We *need* to insert element somewhere in between the
+ * last element we read earlier and the actual last element.
+ */
+ int i = cinit;
- /* Move last pointer forward... */
- while (1) {
- if (erts_atomic_read_rb(&this->atmc_next) != ERTS_AINT_NULL) {
- /* Someone else will move it forward */
- return erts_atomic_read_rb(&ddq->tail.data.last);
+ while (1) {
+ erts_aint_t itmp2;
+ erts_atomic_set_nob(&this->atmc_next, itmp);
+ itmp2 = erts_atomic_cmpxchg_relb(&enq->atmc_next,
+ (erts_aint_t) this,
+ itmp);
+ if (itmp == itmp2)
+ return 0; /* inserted this */
+ if ((i & 1) == 0)
+ itmp = itmp2;
+ else {
+ enq = (ErtsAllctrDDBlock_t *) itmp2;
+ itmp = erts_atomic_read_acqb(&enq->atmc_next);
+ ASSERT(itmp != ERTS_AINT_NULL);
+ }
+ i++;
}
- itmp = erts_atomic_cmpxchg_mb(&ddq->tail.data.last,
- (erts_aint_t) this,
- ilast);
- if (ilast == itmp)
- return (erts_aint_t) this;
- ilast = itmp;
}
}
+static ERTS_INLINE erts_aint_t
+check_insert_marker(ErtsAllctrDDQueue_t *ddq, erts_aint_t ilast)
+{
+ if (!ddq->head.used_marker
+ && ddq->head.unref_end == (ErtsAllctrDDBlock_t *) ilast) {
+ erts_aint_t itmp;
+ ErtsAllctrDDBlock_t *last = (ErtsAllctrDDBlock_t *) ilast;
+
+ erts_atomic_init_nob(&ddq->tail.data.marker.atmc_next, ERTS_AINT_NULL);
+ itmp = erts_atomic_cmpxchg_relb(&last->atmc_next,
+ (erts_aint_t) &ddq->tail.data.marker,
+ ERTS_AINT_NULL);
+ if (itmp == ERTS_AINT_NULL) {
+ ilast = (erts_aint_t) &ddq->tail.data.marker;
+ ddq->head.used_marker = !0;
+ erts_atomic_set_relb(&ddq->tail.data.last, ilast);
+ }
+ }
+ return ilast;
+}
+
static ERTS_INLINE int
-ddq_enqueue(ErtsAlcType_t type, ErtsAllctrDDQueue_t *ddq, void *ptr)
+ddq_enqueue(ErtsAlcType_t type, ErtsAllctrDDQueue_t *ddq, void *ptr, int cinit)
{
- erts_aint_t ilast;
+ int last_elem;
int um_refc_ix = 0;
int managed_thread = erts_thr_progress_is_managed_thread();
if (!managed_thread) {
@@ -884,11 +921,11 @@ ddq_enqueue(ErtsAlcType_t type, ErtsAllctrDDQueue_t *ddq, void *ptr)
}
}
- ilast = ddq_managed_thread_enqueue(ddq, ptr);
+ last_elem = ddq_managed_thread_enqueue(ddq, ptr, cinit);
if (!managed_thread)
erts_atomic_dec_relb(&ddq->tail.data.um_refc[um_refc_ix]);
- return ilast == (erts_aint_t) ptr;
+ return last_elem;
}
static ERTS_INLINE void *
@@ -934,20 +971,16 @@ ddq_check_incoming(ErtsAllctrDDQueue_t *ddq)
int um_refc_ix;
ddq->head.next.thr_progress_reached = 1;
um_refc_ix = ddq->head.next.um_refc_ix;
- if (erts_atomic_read_acqb(&ddq->tail.data.um_refc[um_refc_ix]) == 0) {
+ if (erts_atomic_read_nob(&ddq->tail.data.um_refc[um_refc_ix]) == 0) {
/* Move unreferenced end pointer forward... */
+ ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore);
+
ddq->head.unref_end = ddq->head.next.unref_end;
- if (!ddq->head.used_marker
- && ddq->head.unref_end == (ErtsAllctrDDBlock_t *) ilast) {
- ddq->head.used_marker = 1;
- ilast = ddq_managed_thread_enqueue(ddq, &ddq->tail.data.marker);
- }
+ ilast = check_insert_marker(ddq, ilast);
- if (ddq->head.unref_end == (ErtsAllctrDDBlock_t *) ilast)
- ERTS_THR_MEMORY_BARRIER;
- else {
+ if (ddq->head.unref_end != (ErtsAllctrDDBlock_t *) ilast) {
ddq->head.next.unref_end = (ErtsAllctrDDBlock_t *) ilast;
ddq->head.next.thr_progress = erts_thr_progress_later(NULL);
erts_atomic32_set_relb(&ddq->tail.data.um_refc_ix,
@@ -1092,12 +1125,15 @@ handle_delayed_dealloc(Allctr_t *allctr,
}
static ERTS_INLINE void
-enqueue_dealloc_other_instance(ErtsAlcType_t type, Allctr_t *allctr, void *ptr)
+enqueue_dealloc_other_instance(ErtsAlcType_t type,
+ Allctr_t *allctr,
+ void *ptr,
+ int cinit)
{
if (allctr->fix)
((UWord *) ptr)[ERTS_ALCU_DD_FIX_TYPE_OFFS] = (UWord) type;
- if (ddq_enqueue(type, &allctr->dd.q, ptr))
+ if (ddq_enqueue(type, &allctr->dd.q, ptr, cinit))
erts_alloc_notify_delayed_dealloc(allctr->ix);
}
@@ -3613,7 +3649,11 @@ erts_alcu_free_thr_pref(ErtsAlcType_t type, void *extra, void *p)
get_pref_allctr(extra, &pref_allctr);
ptr = get_used_allctr(extra, p, &used_allctr, NULL);
if (pref_allctr != used_allctr)
- enqueue_dealloc_other_instance(type, used_allctr, ptr);
+ enqueue_dealloc_other_instance(type,
+ used_allctr,
+ ptr,
+ (used_allctr->dd.ix
+ - pref_allctr->dd.ix));
else {
if (used_allctr->thread_safe)
erts_mtx_lock(&used_allctr->mutex);
@@ -3988,7 +4028,11 @@ realloc_thr_pref(ErtsAlcType_t type, void *extra, void *p, Uint size,
sys_memcpy(res, p, cpy_size);
if (!force_move || used_allctr != pref_allctr)
- enqueue_dealloc_other_instance(type, used_allctr, ptr);
+ enqueue_dealloc_other_instance(type,
+ used_allctr,
+ ptr,
+ (used_allctr->dd.ix
+ - pref_allctr->dd.ix));
else {
do_erts_alcu_free(type, used_allctr, ptr);
ASSERT(pref_allctr == used_allctr);
@@ -4179,6 +4223,7 @@ erts_alcu_start(Allctr_t *allctr, AllctrInit_t *init)
allctr->dd.use = 1;
init_dd_queue(&allctr->dd.q);
+ allctr->dd.ix = init->ix;
}
else
#endif
diff --git a/erts/emulator/beam/erl_sched_spec_pre_alloc.c b/erts/emulator/beam/erl_sched_spec_pre_alloc.c
index 37b186abd9..a490aec734 100644
--- a/erts/emulator/beam/erl_sched_spec_pre_alloc.c
+++ b/erts/emulator/beam/erl_sched_spec_pre_alloc.c
@@ -116,54 +116,84 @@ erts_sspa_create(size_t blk_sz, int pa_size)
return data;
}
-static ERTS_INLINE erts_aint_t
+static ERTS_INLINE void
enqueue_remote_managed_thread(erts_sspa_chunk_header_t *chdr,
erts_sspa_blk_t *this,
- int want_last)
+ int cinit)
{
- erts_aint_t ilast, itmp;
+ erts_aint_t itmp;
+ erts_sspa_blk_t *enq;
erts_atomic_init_nob(&this->next_atmc, ERTS_AINT_NULL);
-
/* Enqueue at end of list... */
- ilast = erts_atomic_read_nob(&chdr->tail.data.last);
- while (1) {
- erts_sspa_blk_t *last = (erts_sspa_blk_t *) ilast;
- itmp = erts_atomic_cmpxchg_mb(&last->next_atmc,
- (erts_aint_t) this,
- ERTS_AINT_NULL);
- if (itmp == ERTS_AINT_NULL)
- break;
- ilast = itmp;
+ enq = (erts_sspa_blk_t *) erts_atomic_read_nob(&chdr->tail.data.last);
+ itmp = erts_atomic_cmpxchg_relb(&enq->next_atmc,
+ (erts_aint_t) this,
+ ERTS_AINT_NULL);
+ if (itmp == ERTS_AINT_NULL) {
+ /* We are required to move last pointer */
+#ifdef DEBUG
+ ASSERT(ERTS_AINT_NULL == erts_atomic_read_nob(&this->next_atmc));
+ ASSERT(((erts_aint_t) enq)
+ == erts_atomic_xchg_relb(&chdr->tail.data.last,
+ (erts_aint_t) this));
+#else
+ erts_atomic_set_relb(&chdr->tail.data.last, (erts_aint_t) this);
+#endif
}
+ else {
+ /*
+ * We *need* to insert element somewhere in between the
+ * last element we read earlier and the actual last element.
+ */
+ int i = cinit;
- /* Move last pointer forward... */
- while (1) {
- erts_aint_t itmp;
- if (want_last) {
- if (erts_atomic_read_rb(&this->next_atmc) != ERTS_AINT_NULL) {
- /* Someone else will move it forward */
- return erts_atomic_read_nob(&chdr->tail.data.last);
+ while (1) {
+ erts_aint_t itmp2;
+ erts_atomic_set_nob(&this->next_atmc, itmp);
+ itmp2 = erts_atomic_cmpxchg_relb(&enq->next_atmc,
+ (erts_aint_t) this,
+ itmp);
+ if (itmp == itmp2)
+ break; /* inserted this */
+ if ((i & 1) == 0)
+ itmp = itmp2;
+ else {
+ enq = (erts_sspa_blk_t *) itmp;
+ itmp = erts_atomic_read_acqb(&enq->next_atmc);
+ ASSERT(itmp != ERTS_AINT_NULL);
}
+ i++;
}
- else {
- if (erts_atomic_read_nob(&this->next_atmc) != ERTS_AINT_NULL) {
- /* Someone else will move it forward */
- return ERTS_AINT_NULL;
- }
+ }
+}
+
+static ERTS_INLINE erts_aint_t
+check_insert_marker(erts_sspa_chunk_header_t *chdr, erts_aint_t ilast)
+{
+ if (!chdr->head.used_marker
+ && chdr->head.unref_end == (erts_sspa_blk_t *) ilast) {
+ erts_aint_t itmp;
+ erts_sspa_blk_t *last = (erts_sspa_blk_t *) ilast;
+
+ erts_atomic_init_nob(&chdr->tail.data.marker.next_atmc, ERTS_AINT_NULL);
+ itmp = erts_atomic_cmpxchg_relb(&last->next_atmc,
+ (erts_aint_t) &chdr->tail.data.marker,
+ ERTS_AINT_NULL);
+ if (itmp == ERTS_AINT_NULL) {
+ ilast = (erts_aint_t) &chdr->tail.data.marker;
+ chdr->head.used_marker = !0;
+ erts_atomic_set_relb(&chdr->tail.data.last, ilast);
}
- itmp = erts_atomic_cmpxchg_mb(&chdr->tail.data.last,
- (erts_aint_t) this,
- ilast);
- if (ilast == itmp)
- return want_last ? (erts_aint_t) this : ERTS_AINT_NULL;
- ilast = itmp;
}
+ return ilast;
}
void
-erts_sspa_remote_free(erts_sspa_chunk_header_t *chdr, erts_sspa_blk_t *blk)
+erts_sspa_remote_free(erts_sspa_chunk_header_t *chdr,
+ erts_sspa_blk_t *blk,
+ int cinit)
{
int um_refc_ix = 0;
int managed_thread = erts_thr_progress_is_managed_thread();
@@ -180,7 +210,7 @@ erts_sspa_remote_free(erts_sspa_chunk_header_t *chdr, erts_sspa_blk_t *blk)
}
}
- (void) enqueue_remote_managed_thread(chdr, blk, 0);
+ enqueue_remote_managed_thread(chdr, blk, cinit);
if (!managed_thread)
erts_atomic_dec_relb(&chdr->tail.data.um_refc[um_refc_ix]);
@@ -208,24 +238,17 @@ fetch_remote(erts_sspa_chunk_header_t *chdr, int max)
int um_refc_ix;
chdr->head.next.thr_progress_reached = 1;
um_refc_ix = chdr->head.next.um_refc_ix;
- if (erts_atomic_read_acqb(&chdr->tail.data.um_refc[um_refc_ix]) == 0) {
+ if (erts_atomic_read_nob(&chdr->tail.data.um_refc[um_refc_ix]) == 0) {
+
+ ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore);
/* Move unreferenced end pointer forward... */
chdr->head.unref_end = chdr->head.next.unref_end;
- if (!chdr->head.used_marker
- && chdr->head.unref_end == (erts_sspa_blk_t *) ilast) {
- /* Need to equeue marker */
- chdr->head.used_marker = 1;
- ilast = enqueue_remote_managed_thread(chdr,
- &chdr->tail.data.marker,
- 1);
- }
+ ilast = check_insert_marker(chdr, ilast);
- if (chdr->head.unref_end == (erts_sspa_blk_t *) ilast)
- ERTS_THR_MEMORY_BARRIER;
- else {
+ if (chdr->head.unref_end != (erts_sspa_blk_t *) ilast) {
chdr->head.next.unref_end = (erts_sspa_blk_t *) ilast;
chdr->head.next.thr_progress = erts_thr_progress_later(NULL);
erts_atomic32_set_relb(&chdr->tail.data.um_refc_ix,
diff --git a/erts/emulator/beam/erl_sched_spec_pre_alloc.h b/erts/emulator/beam/erl_sched_spec_pre_alloc.h
index d36066c399..bccb1aba7a 100644
--- a/erts/emulator/beam/erl_sched_spec_pre_alloc.h
+++ b/erts/emulator/beam/erl_sched_spec_pre_alloc.h
@@ -142,7 +142,8 @@ check_local_list(erts_sspa_chunk_header_t *chdr)
erts_sspa_data_t *erts_sspa_create(size_t blk_sz,
int pa_size);
void erts_sspa_remote_free(erts_sspa_chunk_header_t *chdr,
- erts_sspa_blk_t *blk);
+ erts_sspa_blk_t *blk,
+ int cinit);
erts_sspa_blk_t *erts_sspa_process_remote_frees(erts_sspa_chunk_header_t *chdr,
erts_sspa_blk_t *old_res);
@@ -216,7 +217,7 @@ erts_sspa_free(erts_sspa_data_t *data, int cix, char *cblk)
chdr = &chnk->aligned.header;
if (chnk_cix != cix) {
/* Remote chunk */
- erts_sspa_remote_free(chdr, blk);
+ erts_sspa_remote_free(chdr, blk, chnk_cix - cix);
}
else {
/* Local chunk */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 11:09:46 +0000