Introduce new environement variable GC_HEAP_FREE_SLOTS_GOAL_RATIO (goal_ratio) to calculate the ratio of additional memory.
Before this change, we add pages with the following formula (when free_slots < total_pages * RUBY_GC_HEAP_FREE_SLOTS_MIN_RATIO): next_pages = total_pages * RUBY_GC_HEAP_GROWTH_FACTOR
This addition can allocate too much.
With this change, we increase pages to satisfy the following formula: next_free_slots = next_total_slots * goal_ratio where next_free_slots = free_slots + adding_slots next_total_slots = total_slots + adding_slots.
If you want to prepare many free slots, increase this ratio.
If this variable is 0, then simply multiply RUBY_GC_HEAP_GROWTH_FACTOR.
Added by ko1 (Koichi Sasada) over 9 years ago
gc.c: change additional allocation policy.
Introduce new environement variable
GC_HEAP_FREE_SLOTS_GOAL_RATIO (goal_ratio) to calculate the ratio
of additional memory.
Before this change, we add pages with the following formula
(when free_slots < total_pages * RUBY_GC_HEAP_FREE_SLOTS_MIN_RATIO):
next_pages = total_pages * RUBY_GC_HEAP_GROWTH_FACTOR
This addition can allocate too much.
With this change, we increase pages to satisfy the following formula:
next_free_slots = next_total_slots * goal_ratio
where
next_free_slots = free_slots + adding_slots
next_total_slots = total_slots + adding_slots.
If you want to prepare many free slots, increase this ratio.
If this variable is 0, then simply multiply
RUBY_GC_HEAP_GROWTH_FACTOR.
gc.c (get_envparam_double): enable to accept 0.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54453 b2dd03c8-39d4-4d8f-98ff-823fe69b080e