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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tools
import (
"fmt"
"net"
"regexp"
"strconv"
"strings"
"testing"
)
// Hey is for the client application 'hey'.
type Hey struct {
Requests int // Note: requests cannot be less than concurrency.
Concurrency int
Doc string
}
// MakeCmd returns a 'hey' command.
func (h *Hey) MakeCmd(ip net.IP, port int) []string {
return strings.Split(fmt.Sprintf("hey -n %d -c %d http://%s:%d/%s",
h.Requests, h.Concurrency, ip, port, h.Doc), " ")
}
// Report parses output from 'hey' and reports metrics.
func (h *Hey) Report(b *testing.B, output string) {
b.Helper()
requests, err := h.parseRequestsPerSecond(output)
if err != nil {
b.Fatalf("failed to parse requests per second: %v", err)
}
ReportCustomMetric(b, requests, "requests_per_second" /*metric name*/, "QPS" /*unit*/)
ave, err := h.parseAverageLatency(output)
if err != nil {
b.Fatalf("failed to parse average latency: %v", err)
}
ReportCustomMetric(b, ave, "average_latency" /*metric name*/, "s" /*unit*/)
}
var heyReqPerSecondRE = regexp.MustCompile(`Requests/sec:\s*(\d+\.?\d+?)\s+`)
// parseRequestsPerSecond finds requests per second from 'hey' output.
func (h *Hey) parseRequestsPerSecond(data string) (float64, error) {
match := heyReqPerSecondRE.FindStringSubmatch(data)
if len(match) < 2 {
return 0, fmt.Errorf("failed get bandwidth: %s", data)
}
return strconv.ParseFloat(match[1], 64)
}
var heyAverageLatencyRE = regexp.MustCompile(`Average:\s*(\d+\.?\d+?)\s+secs`)
// parseHeyAverageLatency finds Average Latency in seconds form 'hey' output.
func (h *Hey) parseAverageLatency(data string) (float64, error) {
match := heyAverageLatencyRE.FindStringSubmatch(data)
if len(match) < 2 {
return 0, fmt.Errorf("failed get average latency match%d : %s", len(match), data)
}
return strconv.ParseFloat(match[1], 64)
}
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