mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Zach Koopmans
eae4c6f275
Also, revise hackbench to use b.N to scale. There was some discussion on the [original PR](https://github.com/google/gvisor/pull/7989#discussion_r973206930) about making this fixed. However, after looking again, loops should scale by b.N. Fixed number of loops can use -test.benchtime=100x or whatever and comparison can be done using golang's 'ns/op' metric where the op is number of loops. PiperOrigin-RevId: 487678691
70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
// Copyright 2022 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tools
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import (
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"fmt"
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"regexp"
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"strconv"
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"testing"
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)
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// Hackbench makes 'hackbench' commands and parses their output.
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type Hackbench struct {
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IpcMode string // ipc mode: pipe, socket(default)
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ProcessMode string // process mode: thread, process(default)
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}
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// MakeCmd makes commands for Hackbench.
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func (s *Hackbench) MakeCmd(b *testing.B) []string {
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cmd := []string{"hackbench"}
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// ipc mode
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if s.IpcMode == "pipe" {
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cmd = append(cmd, "--pipe")
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}
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// group num
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cmd = append(cmd, "--groups=10")
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// process mode
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if s.ProcessMode == "thread" {
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cmd = append(cmd, "--threads")
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} else {
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cmd = append(cmd, "--process")
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}
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// loops
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cmd = append(cmd, fmt.Sprintf("--loops=%d", b.N))
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return cmd
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}
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// Report reports the relevant metrics for Hackbench.
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func (s *Hackbench) Report(b *testing.B, output string) {
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b.Helper()
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result, err := s.parseResult(output)
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if err != nil {
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b.Fatalf("parsing result from %s failed: %v", output, err)
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}
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ReportCustomMetric(b, result, "execution_time" /*metric name*/, "s" /*unit*/)
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ReportCustomMetric(b, result/float64(b.N), "execution_time_per_loop" /*metric name*/, "s" /*unit*/)
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}
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var hackbenchRegexp = regexp.MustCompile(`Time:\s*(\d*.?\d*)\n`)
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func (s *Hackbench) parseResult(data string) (float64, error) {
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match := hackbenchRegexp.FindStringSubmatch(data)
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if len(match) < 2 {
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return 0.0, fmt.Errorf("could not find Time: %s", data)
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}
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return strconv.ParseFloat(match[1], 64)
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}
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