diff options
Diffstat (limited to 'src/runtime/msize.go')
| -rw-r--r-- | src/runtime/msize.go | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/runtime/msize.go b/src/runtime/msize.go index a113b0d963..370cae629e 100644 --- a/src/runtime/msize.go +++ b/src/runtime/msize.go @@ -27,8 +27,15 @@ package runtime -//var class_to_size [_NumSizeClasses]int32 -//var class_to_allocnpages [_NumSizeClasses]int32 +// Size classes. Computed and initialized by InitSizes. +// +// SizeToClass(0 <= n <= MaxSmallSize) returns the size class, +// 1 <= sizeclass < NumSizeClasses, for n. +// Size class 0 is reserved to mean "not small". +// +// class_to_size[i] = largest size in class i +// class_to_allocnpages[i] = number of pages to allocate when +// making new objects in class i // The SizeToClass lookup is implemented using two arrays, // one mapping sizes <= 1024 to their class and one mapping @@ -38,8 +45,11 @@ package runtime // are 128-aligned, so the second array is indexed by the // size divided by 128 (rounded up). The arrays are filled in // by InitSizes. -//var size_to_class8 [1024/8 + 1]int8 -//var size_to_class128 [(_MaxSmallSize-1024)/128 + 1]int8 + +var class_to_size [_NumSizeClasses]int32 +var class_to_allocnpages [_NumSizeClasses]int32 +var size_to_class8 [1024/8 + 1]int8 +var size_to_class128 [(_MaxSmallSize-1024)/128 + 1]int8 func sizeToClass(size int32) int32 { if size > _MaxSmallSize { |