aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/beam/dist.c
diff options
context:
space:
mode:
authorSverker Eriksson <[email protected]>2015-06-02 19:23:49 +0200
committerSverker Eriksson <[email protected]>2015-06-15 14:48:22 +0200
commit02d0ce034598297565f2b35ecc3d1af121787f33 (patch)
treea415e4b7d21c240352ae8737806e516caa2f2b43 /erts/emulator/beam/dist.c
parent512c321bdaf25b685124405e287a3839be467149 (diff)
downloadotp-02d0ce034598297565f2b35ecc3d1af121787f33.tar.gz
otp-02d0ce034598297565f2b35ecc3d1af121787f33.tar.bz2
otp-02d0ce034598297565f2b35ecc3d1af121787f33.zip
erts: Remove hashmap probabilistic heap overestimation
by adding a dynamic heap factory. "binary_to_term" is now a hybrid solution with both a call to decoded_size() to calculate needed heap space AND possible dynamic allocation of more heap space if needed for big maps. The heap size returned from decoded_size() is guaranteed to be sufficient for all term heap data except for hashmap nodes. All hashmap nodes are created at the end of dec_term() by invoking the heap factory interface that may allocate more heap space on process heap or in fragments. With this commit it is no longer guaranteed that a message is confined to only one heap fragment.
Diffstat (limited to 'erts/emulator/beam/dist.c')
-rw-r--r--erts/emulator/beam/dist.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index 142fcb3c00..ae85659522 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -1149,6 +1149,7 @@ int erts_net_message(Port *prt,
DeclareTmpHeapNoproc(ctl_default,DIST_CTL_DEFAULT_SIZE);
Eterm* ctl = ctl_default;
ErlOffHeap off_heap;
+ ErtsHeapFactory factory;
Eterm* hp;
Sint type;
Eterm token;
@@ -1225,7 +1226,8 @@ int erts_net_message(Port *prt,
}
hp = ctl;
- arg = erts_decode_dist_ext(&hp, &off_heap, &ede);
+ erts_factory_static_init(&factory, ctl, ctl_len, &off_heap);
+ arg = erts_decode_dist_ext(&factory, &ede);
if (is_non_value(arg)) {
#ifdef ERTS_DIST_MSG_DBG
erts_fprintf(stderr, "DIST MSG DEBUG: erts_dist_ext_size(CTL) failed:\n");