Ubuntu : Intel® Q6600® quad-core
Computer Language Benchmarks Game      [[ Play ]]

- all benchmarks - n-body fannkuch-redux meteor-contest fasta fasta-redux spectral-norm reverse-complement mandelbrot k-nucleotide regex-dna pidigits chameneos-redux thread-ring binary-trees-redux binary-trees - all languages - Ada 2005 GNAT ATS C gcc Clojure C# Mono C++ g++ Dart Erlang HiPE F# Mono Fortran Intel Go Haskell GHC Java 7 Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 2.0 Ruby JRuby Scala x86 one core x64 quad-core x86 quad-core x64 one core

 performance measurements

Each table row shows performance measurements for this Go program with a particular command-line input value N.

N	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load
500,000	0.16	0.16	?	405	0% 94% 0% 0%
5,000,000	1.43	1.43	2,852	405	1% 1% 0% 99%
50,000,000	13.99	14.00	2,852	405	90% 11% 0% 0%

Read the ↓ make, command line, and program output logs to see how this program was run.

Read thread-ring benchmark to see what this program should do.

 notes

go version go1.1.1 linux/386

 thread-ring Go #5 program source code

/* The Computer Language Benchmarks Game
   http://benchmarksgame.alioth.debian.org/

   contributed by KP
*/

package main

import (
   "fmt"
   "os"
   "runtime"
   "strconv"
   "sync"
)

type Token int

type T struct {
   next  *T
   label int
   value int
   mux   sync.Mutex
}

func (w *T) put(v int) {
   w.value = v
   if v == 0 {
      res <- w.label
   } else {
      w.mux.Unlock()
   }
}

func (w *T) run() {
   for {
      w.mux.Lock()
      w.next.put(w.value - 1)
      runtime.Gosched()
   }
}

func (w *T) Start(label int, next *T) {
   w.label = label
   w.next = next
   w.mux.Lock()
   go w.run()
}

const NThreads = 503

var res = make(chan int)

func main() {
   n := 1000
   if len(os.Args) > 1 {
      n, _ = strconv.Atoi(os.Args[1])
   }

   var channels [NThreads]T
   for i := range channels {
      channels[i].Start(i+1, &channels[(i+1)%NThreads])
   }

   channels[0].put(n)
   fmt.Println(<-res)
}

 make, command-line, and program output logs

Thu, 13 Jun 2013 22:08:54 GMT

MAKE:
/usr/local/src/go/bin/go build -o threadring.go-5.go_run
0.29s to complete and log all make actions

COMMAND LINE:
./threadring.go-5.go_run 50000000

PROGRAM OUTPUT:
292

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