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| author | Dmitriy Vyukov <dvyukov@google.com> | 2014-07-29 11:01:02 +0400 |
|---|---|---|
| committer | Dmitriy Vyukov <dvyukov@google.com> | 2014-07-29 11:01:02 +0400 |
| commit | cd17a717f9f49cffb40fbdef59d1dfac1f9e0cfd (patch) | |
| tree | 9ecec51ca71307c73ac6cdf6522855e0e8b594d8 /src/pkg/runtime/runtime.h | |
| parent | 0100afbdcc065ec20631d60cf7621d642f44b9d5 (diff) | |
| download | go-cd17a717f9f49cffb40fbdef59d1dfac1f9e0cfd.tar.xz | |
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
Diffstat (limited to 'src/pkg/runtime/runtime.h')
| -rw-r--r-- | src/pkg/runtime/runtime.h | 1 |
1 files changed, 0 insertions, 1 deletions
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; |