mirror of https://github.com/golang/go.git
daaf29cf93
The new implementation features wait-free fast path for readers which significantly improves performance/scalability on read-mostly workloads. Benchmark results on HP Z600 (2 x Xeon E5620, 8 HT cores, 2.40GHz) are as follows: benchmark old ns/op new ns/op delta BenchmarkRWMutexUncontended 179.00 96.60 -46.03% BenchmarkRWMutexUncontended-2 89.10 49.10 -44.89% BenchmarkRWMutexUncontended-4 44.70 24.70 -44.74% BenchmarkRWMutexUncontended-8 23.30 12.90 -44.64% BenchmarkRWMutexUncontended-16 16.80 8.75 -47.92% BenchmarkRWMutexWrite100 79.60 26.80 -66.33% BenchmarkRWMutexWrite100-2 305.00 33.00 -89.18% BenchmarkRWMutexWrite100-4 245.00 113.00 -53.88% BenchmarkRWMutexWrite100-8 330.00 147.00 -55.45% BenchmarkRWMutexWrite100-16 371.00 152.00 -59.03% BenchmarkRWMutexWrite10 78.30 29.80 -61.94% BenchmarkRWMutexWrite10-2 348.00 165.00 -52.59% BenchmarkRWMutexWrite10-4 447.00 199.00 -55.48% BenchmarkRWMutexWrite10-8 564.00 180.00 -68.09% BenchmarkRWMutexWrite10-16 492.00 192.00 -60.98% BenchmarkRWMutexWorkWrite100 1077.00 1037.00 -3.71% BenchmarkRWMutexWorkWrite100-2 659.00 596.00 -9.56% BenchmarkRWMutexWorkWrite100-4 509.00 361.00 -29.08% BenchmarkRWMutexWorkWrite100-8 603.00 351.00 -41.79% BenchmarkRWMutexWorkWrite100-16 750.00 607.00 -19.07% BenchmarkRWMutexWorkWrite10 990.00 951.00 -3.94% BenchmarkRWMutexWorkWrite10-2 1119.00 1070.00 -4.38% BenchmarkRWMutexWorkWrite10-4 1300.00 1199.00 -7.77% BenchmarkRWMutexWorkWrite10-8 1424.00 1291.00 -9.34% BenchmarkRWMutexWorkWrite10-16 1981.00 1786.00 -9.84% R=rsc CC=golang-dev https://golang.org/cl/4671051 |
||
|---|---|---|
| .. | ||
| cmd | ||
| lib9 | ||
| libbio | ||
| libmach | ||
| pkg | ||
| Make.ccmd | ||
| Make.clib | ||
| Make.cmd | ||
| Make.common | ||
| Make.inc | ||
| Make.pkg | ||
| all-qemu.bash | ||
| all.bash | ||
| clean.bash | ||
| env.bash | ||
| make.bash | ||
| quietgcc.bash | ||
| run.bash | ||
| sudo.bash | ||
| version.bash | ||