74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
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package main
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import (
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"context"
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"flag"
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"fmt"
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"net"
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"sync/atomic"
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"time"
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)
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var host string
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var connections int
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var duration int64
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var limit int64
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var timeoutCount int64
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func main() {
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flag.StringVar(&host, "host", "", "Resolve host")
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flag.IntVar(&connections, "c", 100, "Connections")
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flag.Int64Var(&duration, "d", 0, "Duration(s)")
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flag.Int64Var(&limit, "l", 0, "Limit(ms)")
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flag.Parse()
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var count int64 = 0
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var errCount int64 = 0
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pool := make(chan interface{}, connections)
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exit := make(chan bool)
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var (
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min int64 = 0
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max int64 = 0
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sum int64 = 0
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)
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go func() {
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time.Sleep(time.Second * time.Duration(duration))
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exit <- true
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}()
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endD:
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for {
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select {
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case pool <- nil:
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go func() {
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defer func() {
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<-pool
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}()
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resolver := &net.Resolver{}
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now := time.Now()
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_, err := resolver.LookupIPAddr(context.Background(), host)
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use := time.Since(now).Nanoseconds() / int64(time.Millisecond)
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if min == 0 || use < min {
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min = use
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}
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if use > max {
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max = use
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}
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sum += use
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if limit > 0 && use >= limit {
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timeoutCount++
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}
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atomic.AddInt64(&count, 1)
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if err != nil {
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fmt.Println(err.Error())
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atomic.AddInt64(&errCount, 1)
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}
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}()
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case <-exit:
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break endD
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}
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}
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fmt.Printf("request count：%d\nerror count：%d\n", count, errCount)
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fmt.Printf("request time：min(%dms) max(%dms) avg(%dms) timeout(%dn)\n", min, max, sum/count, timeoutCount)
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}
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