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* gc.c (rb_gc_writebarrier): give up rescan A and register B directly

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if A has huge number of children.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41460 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
tarui 2013-06-19 22:48:03 +00:00
parent d7ebd9e641
commit 88927b04ae
2 changed files with 21 additions and 3 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Thu Jun 20 07:46:48 2013 Masaya Tarui <tarui@ruby-lang.org>
* gc.c (rb_gc_writebarrier): give up rescan A and register B directly
if A has huge number of children.
Thu Jun 20 07:30:35 2013 Koichi Sasada <ko1@atdot.net>
* common.mk: add new rules `gcbench-rdoc', `gcbench-hash'.

19
gc.c
View file

@ -3786,6 +3786,7 @@ void
rb_gc_writebarrier(VALUE a, VALUE b)
{
rb_objspace_t *objspace = &rb_objspace;
int type;
if (RGENGC_CHECK_MODE) {
if (!RVALUE_PROMOTED(a)) rb_bug("rb_gc_wb: referer object %p (%s) is not promoted.\n", (void *)a, obj_type_name(a));
@ -3793,9 +3794,21 @@ rb_gc_writebarrier(VALUE a, VALUE b)
}
if (!rgengc_remembered(objspace, a)) {
rgengc_report(2, objspace, "rb_gc_wb: %p (%s) -> %p (%s)\n",
(void *)a, obj_type_name(a), (void *)b, obj_type_name(b));
rgengc_remember(objspace, a);
type = BUILTIN_TYPE(a);
/* TODO: 2 << 16 is just a magic number. */
if ((type == T_ARRAY && RARRAY_LEN(a) >= 2 << 16) ||
(type == T_HASH && RHASH_SIZE(a) >= 2 << 16)) {
if (!rgengc_remembered(objspace, b)) {
rgengc_report(2, objspace, "rb_gc_wb: %p (%s) -> %p (%s)\n",
(void *)a, obj_type_name(a), (void *)b, obj_type_name(b));
rgengc_remember(objspace, b);
}
}
else {
rgengc_report(2, objspace, "rb_gc_wb: %p (%s) -> %p (%s)\n",
(void *)a, obj_type_name(a), (void *)b, obj_type_name(b));
rgengc_remember(objspace, a);
}
}
}