[14e1053] | 1 | package main |
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| 2 | |
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| 3 | import ( |
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| 4 | "fmt" |
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| 5 | "sync" |
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| 6 | "time" |
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| 7 | "runtime" |
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| 8 | ) |
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| 9 | |
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| 10 | var Channels, ChannelSize int = 2, 100 |
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| 11 | var cons_done, prod_done bool = false, false; |
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| 12 | var total_operations uint64 = 0 |
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| 13 | var m sync.Mutex |
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| 14 | |
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| 15 | var prodJoin chan int = make(chan int) |
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| 16 | var consJoin chan int = make(chan int) |
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| 17 | |
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| 18 | func selectconsumer( chans [] chan uint64 ) { |
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| 19 | var count uint64 = 0 |
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| 20 | for { |
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| 21 | if cons_done { break } |
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| 22 | select { |
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| 23 | case <- chans[0]: |
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| 24 | case <- chans[1]: |
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| 25 | } |
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| 26 | if ! prod_done { count++ } |
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| 27 | } |
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| 28 | m.Lock() |
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| 29 | total_operations += count |
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| 30 | m.Unlock() |
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| 31 | consJoin <- 0 |
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| 32 | } |
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| 33 | |
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| 34 | func consumer( chans [] chan uint64 ) { |
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| 35 | var count uint64 = 0 |
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| 36 | for { |
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| 37 | if cons_done { break } |
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| 38 | <-chans[1] |
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| 39 | if ! prod_done { count++ } |
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| 40 | } |
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| 41 | m.Lock() |
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| 42 | total_operations += count |
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| 43 | m.Unlock() |
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| 44 | consJoin <- 0 |
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| 45 | } |
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| 46 | |
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| 47 | func selectproducer( chans [] chan uint64 ) { |
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| 48 | var count uint64 = 0 |
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| 49 | var checksum uint64 = 0 |
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| 50 | for { |
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| 51 | if prod_done { break } |
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| 52 | checksum = checksum ^ count |
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| 53 | select { |
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| 54 | case chans[0] <- count: |
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| 55 | case chans[1] <- count: |
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| 56 | } |
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| 57 | count++ |
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| 58 | } |
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| 59 | prodJoin <- 0 |
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| 60 | } |
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| 61 | |
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| 62 | func producer( chans [] chan uint64 ) { |
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| 63 | var count uint64 = 0 |
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| 64 | var checksum uint64 = 0 |
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| 65 | for { |
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| 66 | if prod_done { break } |
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| 67 | checksum = checksum ^ count |
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| 68 | chans[1] <- count |
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| 69 | count++ |
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| 70 | } |
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| 71 | prodJoin <- 0 |
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| 72 | } |
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| 73 | |
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| 74 | |
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| 75 | func main() { |
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| 76 | runtime.GOMAXPROCS( 4 ); |
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| 77 | |
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| 78 | // fmt.Println("Processors: ",Processors," Channels: ",Channels," ProdsPerChan: ",ProdsPerChan," ConsPerChan: ",ConsPerChan," Channel Size: ",ChannelSize) |
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| 79 | |
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| 80 | chans := make( [] chan uint64, Channels ) |
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| 81 | for i := range chans { |
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| 82 | chans[i] = make(chan uint64, ChannelSize) |
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| 83 | } |
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| 84 | |
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| 85 | |
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| 86 | go selectproducer( chans ) |
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| 87 | go selectconsumer( chans ) |
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| 88 | go producer( chans ) |
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| 89 | go consumer( chans ) |
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| 90 | |
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| 91 | |
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| 92 | // wait 10 seconds |
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| 93 | time.Sleep(time.Second * 10) |
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| 94 | // fmt.Println("prod done\n") |
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| 95 | prod_done = true |
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| 96 | for j := 0; j < 2; j++ { |
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| 97 | <-prodJoin |
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| 98 | } |
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| 99 | // fmt.Println("cons done\n") |
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| 100 | cons_done = true |
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| 101 | for i := range chans { |
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| 102 | close(chans[i]) |
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| 103 | } |
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| 104 | |
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| 105 | for j := 0; j < 2; j++{ |
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| 106 | <-consJoin |
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| 107 | } |
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| 108 | fmt.Println(total_operations) |
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| 109 | } |
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