go /
go /
ee24bfc0584f368284c2a4bef8e54056876677e9 runtime: unify mutex code across OSes
The change introduces 2 generic mutex implementations
(futex- and semaphore-based). Each OS chooses a suitable mutex
implementation and implements few callbacks (e.g. futex wait/wake).
The CL reduces code duplication, extends some optimizations available
only on Linux/Windows to other OSes and provides ground
for futher optimizations. Chan finalizers are finally eliminated.
(Linux/amd64, 8 HT cores)
benchmark old new
BenchmarkChanContended 83.6 77.8 ns/op
BenchmarkChanContended-2 341 328 ns/op
BenchmarkChanContended-4 382 383 ns/op
BenchmarkChanContended-8 390 374 ns/op
BenchmarkChanContended-16 313 291 ns/op
(Darwin/amd64, 2 cores)
benchmark old new
BenchmarkChanContended 159 172 ns/op
BenchmarkChanContended-2 6735 263 ns/op
BenchmarkChanContended-4 10384 255 ns/op
BenchmarkChanCreation 1174 407 ns/op
BenchmarkChanCreation-2 4007 254 ns/op
BenchmarkChanCreation-4 4029 246 ns/op
R=rsc, jsing, hectorchu
CC=golang-dev
https://golang.org/cl/5140043
11 files changed
