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doc: add round-robin flag to io2010 balance example.
R=r CC=golang-dev https://golang.org/cl/2050042
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@ -6,6 +6,7 @@ package main
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import (
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"container/heap"
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"flag"
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"fmt"
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"rand"
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"time"
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@ -14,6 +15,8 @@ import (
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const nRequester = 100
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const nWorker = 10
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var roundRobin = flag.Bool("r", false, "use round-robin scheduling")
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// Simulation of some work: just sleep for a while and report how long.
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func op() int {
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n := rand.Int63n(1e9)
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@ -125,7 +128,7 @@ func (b *Balancer) print() {
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}
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func (b *Balancer) dispatch(req Request) {
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if false {
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if *roundRobin {
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w := b.pool[b.i]
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w.requests <- req
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w.pending++
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@ -144,7 +147,7 @@ func (b *Balancer) dispatch(req Request) {
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}
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func (b *Balancer) completed(w *Worker) {
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if false {
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if *roundRobin {
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w.pending--
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return
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}
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@ -156,6 +159,7 @@ func (b *Balancer) completed(w *Worker) {
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}
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func main() {
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flag.Parse()
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work := make(chan Request)
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for i := 0; i < nRequester; i++ {
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go requester(work)
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