From cd17a717f9f49cffb40fbdef59d1dfac1f9e0cfd Mon Sep 17 00:00:00 2001 From: Dmitriy Vyukov Date: Tue, 29 Jul 2014 11:01:02 +0400 Subject: runtime: simpler and faster GC Implement the design described in: https://docs.google.com/document/d/1v4Oqa0WwHunqlb8C3ObL_uNQw3DfSY-ztoA-4wWbKcg/pub Summary of the changes: GC uses "2-bits per word" pointer type info embed directly into bitmap. Scanning of stacks/data/heap is unified. The old spans types go away. Compiler generates "sparse" 4-bits type info for GC (directly for GC bitmap). Linker generates "dense" 2-bits type info for data/bss (the same as stacks use). Summary of results: -1680 lines of code total (-1000+ in mgc0.c only) -25% memory consumption -3-7% binary size -15% GC pause reduction -7% run time reduction LGTM=khr R=golang-codereviews, rsc, christoph, khr CC=golang-codereviews, rlh https://golang.org/cl/106260045 --- src/pkg/runtime/runtime.h | 1 - 1 file changed, 1 deletion(-) (limited to 'src/pkg/runtime/runtime.h') diff --git a/src/pkg/runtime/runtime.h b/src/pkg/runtime/runtime.h index e06103abe3..ecff3f3b79 100644 --- a/src/pkg/runtime/runtime.h +++ b/src/pkg/runtime/runtime.h @@ -756,7 +756,6 @@ extern int32 runtime·ncpu; extern bool runtime·iscgo; extern void (*runtime·sysargs)(int32, uint8**); extern uintptr runtime·maxstring; -extern uint32 runtime·Hchansize; extern uint32 runtime·cpuid_ecx; extern uint32 runtime·cpuid_edx; extern DebugVars runtime·debug; -- cgit v1.3-5-g9baa