mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[dev.garbage] runtime: simplify nextFreeFast so it is inlined 

nextFreeFast is currently not inlined by the compiler due
to its size and complexity. This CL simplifies
nextFreeFast by letting the slow path handle (nextFree)
handle a corner cases.

Change-Id: Ia9c5d1a7912bcb4bec072f5fd240f0e0bafb20e4
Reviewed-on: https://go-review.googlesource.com/22598
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
This commit is contained in:
Rick Hudson 2016-04-29 12:09:36 -04:00
parent b3579c095e
commit e9eaa181fc
1 changed files with 2 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/runtime/malloc.go
View File

@ -495,14 +495,11 @@ func nextFreeFast(s *mspan) gclinkptr {
if theBit < 64 {
result := s.freeindex + uintptr(theBit)
if result < s.nelems {
s.allocCache >>= (theBit + 1)
freeidx := result + 1
if freeidx%64 == 0 && freeidx != s.nelems {
// We just incremented s.freeindex so it isn't 0
// so we are moving to the next aCache.
whichByte := freeidx / 8
s.refillAllocCache(whichByte)
return 0
}
s.allocCache >>= (theBit + 1)
s.freeindex = freeidx
v := gclinkptr(result*s.elemsize + s.base())
s.allocCount++