Dmitriy Vyukov
72b09bd7ae
runtime: add matrix multiplication benchmark
...
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7431047
2013-03-01 00:41:45 +02:00
Dmitriy Vyukov
353ce60f6e
runtime: implement local work queues (in preparation for new scheduler)
...
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7402047
2013-02-23 08:48:02 +04:00
Dmitriy Vyukov
a92e11a256
runtime: ensure forward progress of runtime.Gosched() for locked goroutines
...
The removed code leads to the situation when M executes the same locked G again
and again.
This is https://golang.org/cl/7310096 but with return instead of break
in the nested switch.
Fixes #4820 .
R=golang-dev, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/7304102
2013-02-20 12:13:04 +04:00
Russ Cox
60526ca6d1
undo CL 7310096 / 59da6744d66d
...
broke windows build
««« original CL description
runtime: ensure forward progress of runtime.Gosched() for locked goroutines
The removed code leads to the situation when M executes the same locked G again and again.
Fixes #4820 .
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7310096
»»»
TBR=dvyukov
CC=golang-dev
https://golang.org/cl/7343050
2013-02-15 17:54:46 -05:00
Dmitriy Vyukov
f87b7f67b2
runtime: ensure forward progress of runtime.Gosched() for locked goroutines
...
The removed code leads to the situation when M executes the same locked G again and again.
Fixes #4820 .
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7310096
2013-02-15 22:22:13 +04:00
Dmitriy Vyukov
6a828482fa
runtime: add more tests for LockOSThread()
...
Just test some additional paths through the scheduler.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7331044
2013-02-15 00:02:12 +04:00
Dave Cheney
6a9e956f19
all: use t.Skip{,f}
...
Replace various t.Log{,f} ; return checks with t.Skip{,f}.
R=golang-dev, n13m3y3r, bradfitz, adg, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/7193044
2013-01-24 17:32:10 +11:00
Dmitriy Vyukov
f82db7d9e4
runtime: less aggressive per-thread stack segment caching
...
Introduce global stack segment cache and limit per-thread cache size.
This greatly reduces StackSys memory on workloads that create lots of threads.
benchmark old ns/op new ns/op delta
BenchmarkStackGrowth 665 656 -1.35%
BenchmarkStackGrowth-2 333 328 -1.50%
BenchmarkStackGrowth-4 224 172 -23.21%
BenchmarkStackGrowth-8 124 91 -26.13%
BenchmarkStackGrowth-16 82 47 -41.94%
BenchmarkStackGrowth-32 73 40 -44.79%
BenchmarkStackGrowthDeep 97231 94391 -2.92%
BenchmarkStackGrowthDeep-2 47230 58562 +23.99%
BenchmarkStackGrowthDeep-4 24993 49356 +97.48%
BenchmarkStackGrowthDeep-8 15105 30072 +99.09%
BenchmarkStackGrowthDeep-16 10005 15623 +56.15%
BenchmarkStackGrowthDeep-32 12517 13069 +4.41%
TestStackMem#1,MB 310 12 -96.13%
TestStackMem#2,MB 296 14 -95.27%
TestStackMem#3,MB 479 14 -97.08%
TestStackMem#1,sec 3.22 2.26 -29.81%
TestStackMem#2,sec 2.43 2.15 -11.52%
TestStackMem#3,sec 2.50 2.38 -4.80%
R=sougou, no.smile.face, rsc
CC=golang-dev, msolomon
https://golang.org/cl/7029044
2013-01-10 09:57:06 +04:00
Dmitriy Vyukov
5a5e698c8f
runtime: add goroutine creation benchmark
...
Current results on 2 core darwin/amd64:
BenchmarkGoroutineChain 351 ns/op
BenchmarkGoroutineChain-2 3840 ns/op
BenchmarkGoroutineChain-4 4040 ns/op
BenchmarkConcGoroutineChain 350 ns/op
BenchmarkConcGoroutineChain-2 875 ns/op
BenchmarkConcGoroutineChain-4 2027 ns/op
R=r, rsc
CC=golang-dev
https://golang.org/cl/6332054
2012-06-27 21:57:49 +04:00
Russ Cox
025abd530e
runtime: faster entersyscall, exitsyscall
...
Uses atomic memory accesses to avoid the need to acquire
and release schedlock on fast paths.
benchmark old ns/op new ns/op delta
runtime_test.BenchmarkSyscall 73 31 -56.63%
runtime_test.BenchmarkSyscall-2 538 74 -86.23%
runtime_test.BenchmarkSyscall-3 508 103 -79.72%
runtime_test.BenchmarkSyscall-4 721 97 -86.52%
runtime_test.BenchmarkSyscallWork 920 873 -5.11%
runtime_test.BenchmarkSyscallWork-2 516 481 -6.78%
runtime_test.BenchmarkSyscallWork-3 550 343 -37.64%
runtime_test.BenchmarkSyscallWork-4 632 263 -58.39%
(Intel Core i7 L640 2.13 GHz-based Lenovo X201s)
Reduced a less artificial server benchmark
from 11.5r 12.0u 8.0s to 8.3r 9.1u 1.0s.
R=dvyukov, r, bradfitz, r, iant, iant
CC=golang-dev
https://golang.org/cl/4723042
2011-07-19 11:01:17 -04:00
Dmitriy Vyukov
c9152a8568
runtime: eliminate contention during stack allocation
...
Standard-sized stack frames use plain malloc/free
instead of centralized lock-protected FixAlloc.
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
BenchmarkStackGrowth 1045.00 949.00 -9.19%
BenchmarkStackGrowth-2 3450.00 800.00 -76.81%
BenchmarkStackGrowth-4 5076.00 513.00 -89.89%
BenchmarkStackGrowth-8 7805.00 471.00 -93.97%
BenchmarkStackGrowth-16 11751.00 321.00 -97.27%
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4657091
2011-07-12 09:24:32 -07:00
Dmitriy Vyukov
91cc1e6b77
runtime: reset GOMAXPROCS during tests
...
Fix the fact that the test leaves GOMAXPROCS=3
and a running goroutine behind.
R=golang-dev, rsc
CC=dvyukov, golang-dev
https://golang.org/cl/4517121
2011-05-31 10:38:51 -04:00
Russ Cox
4f7fd3cb7f
runtime: disable long test (fix arm build)
...
TBR=r
CC=golang-dev
https://golang.org/cl/4449051
2011-04-23 10:03:51 -04:00
Russ Cox
781df132f9
runtime: stop deadlock test properly (fix arm5 build)
...
TBR=r
CC=golang-dev
https://golang.org/cl/4446058
2011-04-22 15:22:11 -04:00
Dmitriy Vyukov
29d78f1243
runtime: fix GOMAXPROCS vs garbage collection bug
...
Fixes #1715 .
R=golang-dev, rsc1, rsc
CC=golang-dev
https://golang.org/cl/4434053
2011-04-21 12:09:25 -04:00
