archive/ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2025-08-15 13:39:04 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Refactor VM root modules

Browse source 
This `st_table` is used to both mark and pin classes
defined from the C API. But `vm->mark_object_ary` already
does both much more efficiently.

Currently a Ruby process starts with 252 rooted classes,
which uses `7224B` in an `st_table` or `2016B` in an `RArray`.

So a baseline of 5kB saved, but since `mark_object_ary` is
preallocated with `1024` slots but only use `405` of them,
it's a net `7kB` save.

`vm->mark_object_ary` is also being refactored.

Prior to this changes, `mark_object_ary` was a regular `RArray`, but
since this allows for references to be moved, it was marked a second
time from `rb_vm_mark()` to pin these objects.

This has the detrimental effect of marking these references on every
minors even though it's a mostly append only list.

But using a custom TypedData we can save from having to mark
all the references on minor GC runs.

Addtionally, immediate values are now ignored and not appended
to `vm->mark_object_ary` as it's just wasted space.
This commit is contained in:
Jean Boussier 2024-03-03 10:46:46 +01:00 • committed by Peter Zhu
parent 16ec54ec41
commit d4f3dcf4df
27 changed files with 167 additions and 101 deletions
Download patch file Download diff file Expand all files Collapse all files

2
random.c
View file

@ -596,7 +596,7 @@ fill_random_bytes_crypt(void *seed, size_t size)
if (prov != INVALID_HCRYPTPROV) {
#undef RUBY_UNTYPED_DATA_WARNING
#define RUBY_UNTYPED_DATA_WARNING 0
rb_gc_register_mark_object(Data_Wrap_Struct(0, 0, release_crypt, &perm_prov));
rb_vm_register_global_object(Data_Wrap_Struct(0, 0, release_crypt, &perm_prov));
}
}
else { /* another thread acquired */