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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -1,3 +1,21 @@ +Wed Oct 23 17:39:35 2013 Koichi Sasada <ko1@atdot.net> + + * gc.c: introduce tomb heap. + Tomb heap is where zombie objects and ghost (freed slot) lived in. + Separate from other heaps (now there is only eden heap) at sweeping + helps freeing pages more efficiently. + Before this patch, even if there is an empty page at former phase + of sweeping, we can't free it. + + Algorithm: + (1) Sweeping all pages in a heap and move empty pages from the + heap to tomb_heap. + (2) Check all exsisting pages and free a page + if all slots of this page are empty and + there is enough empty slots (checking by swept_num) + + To introduce this pach, there are several tuning of GC parameters. + Wed Oct 23 14:20:56 2013 Koichi Sasada <ko1@atdot.net> * gc.c (gc_prof_sweep_timer_stop): catch up recent changes |