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Print the percentile of time spent on each request #4

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Print the percentile of time spent on each request #4

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28 changes: 24 additions & 4 deletions ab-proxy.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ import (
"time"

"github.com/jessevdk/go-flags"
statslib "github.com/montanaflynn/stats"
"github.com/schollz/progressbar/v2"
)

Expand Down Expand Up @@ -74,6 +75,17 @@ func exitWithErrorMsg(exitCode int, message string, replacements ...interface{})
os.Exit(exitCode)
}

type RequestCostTimeList struct {
statslib.Float64Data
locker *sync.Mutex
}

func (l *RequestCostTimeList) Insert(v float64) {
l.locker.Lock()
l.Float64Data = append(l.Float64Data, v)
l.locker.Unlock()
}

func main() {
var bar *progressbar.ProgressBar

Expand Down Expand Up @@ -174,7 +186,7 @@ func main() {

}

var stats struct {
var stats = struct {
Requests int64
RequestsCompleted int64
RequestsCompletedCode [1000]int64
Expand All @@ -184,7 +196,8 @@ func main() {
BytesTransferred int64
StartTime time.Time
EndTime time.Time
}
RequestsCostData *RequestCostTimeList
}{}

totalRequests := mainOpts.Bursts * mainOpts.Requests

Expand Down Expand Up @@ -232,6 +245,7 @@ func main() {
// start benchmarking

stats.StartTime = time.Now()
stats.RequestsCostData = &RequestCostTimeList{locker: new(sync.Mutex), Float64Data: statslib.Float64Data{}}

for b := 0; b < mainOpts.Bursts && stopChan != nil; b++ {
var requestsLeft int64
Expand Down Expand Up @@ -261,6 +275,7 @@ func main() {

var err error
var resp *http.Response
var startTheReq = time.Now()
req, err := http.NewRequest("GET", mainOpts.Args.Url, nil)
if err == nil {
req.Header = http.Header(headers)
Expand Down Expand Up @@ -318,19 +333,18 @@ func main() {

resp.Body.Close()


if errWhileReading {
continue
}

atomic.AddInt64(&stats.RequestsCompleted, 1)
stats.RequestsCostData.Insert(float64(time.Since(startTheReq) / time.Millisecond))
if resp.StatusCode >= 0 && resp.StatusCode <= 999 {
atomic.AddInt64(&stats.RequestsCompletedCode[resp.StatusCode], 1)
} else {
atomic.AddInt64(&stats.RequestsCompletedCode[0], 1)
}


}
wg.Done()
}()
Expand Down Expand Up @@ -381,6 +395,12 @@ func main() {
fmt.Printf("Time per request: %s\n", timePerReq)
}

fmt.Println("Percentage of the requests served within a certain time (ms)")
for _, p := range []int{50, 75, 90, 95, 99, 100} {
v, _ := stats.RequestsCostData.Percentile(float64(p))
fmt.Printf("%3d%%\t%g\n", p, v)
}

if mainOpts.ShowErrors {
close(errChan)
errWg.Wait() // wait until all errors from the errChan have been set to the errMap
Expand Down