From b9007b6c548f91e88fd3f2ffa23de740431fa969 Mon Sep 17 00:00:00 2001 From: Koichi Sasada Date: Wed, 8 Jan 2020 16:14:01 +0900 Subject: Introduce disposable call-cache. This patch contains several ideas: (1) Disposable inline method cache (IMC) for race-free inline method cache * Making call-cache (CC) as a RVALUE (GC target object) and allocate new CC on cache miss. * This technique allows race-free access from parallel processing elements like RCU. (2) Introduce per-Class method cache (pCMC) * Instead of fixed-size global method cache (GMC), pCMC allows flexible cache size. * Caching CCs reduces CC allocation and allow sharing CC's fast-path between same call-info (CI) call-sites. (3) Invalidate an inline method cache by invalidating corresponding method entries (MEs) * Instead of using class serials, we set "invalidated" flag for method entry itself to represent cache invalidation. * Compare with using class serials, the impact of method modification (add/overwrite/delete) is small. * Updating class serials invalidate all method caches of the class and sub-classes. * Proposed approach only invalidate the method cache of only one ME. See [Feature #16614] for more details. --- ext/objspace/objspace.c | 1 + 1 file changed, 1 insertion(+) (limited to 'ext') diff --git a/ext/objspace/objspace.c b/ext/objspace/objspace.c index 38d3d2fcff..dc1a0cb08f 100644 --- a/ext/objspace/objspace.c +++ b/ext/objspace/objspace.c @@ -638,6 +638,7 @@ count_imemo_objects(int argc, VALUE *argv, VALUE self) imemo_type_ids[9] = rb_intern("imemo_ast"); imemo_type_ids[10] = rb_intern("imemo_parser_strterm"); imemo_type_ids[11] = rb_intern("imemo_callinfo"); + imemo_type_ids[12] = rb_intern("imemo_callcache"); } rb_objspace_each_objects(count_imemo_objects_i, (void *)hash); -- cgit v1.2.3