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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build linux
// +build linux
package net
import (
"io"
"os"
"strconv"
"testing"
)
func BenchmarkSendFile(b *testing.B) {
for i := 0; i <= 10; i++ {
size := 1 << (i + 10)
bench := sendFileBench{chunkSize: size}
b.Run(strconv.Itoa(size), bench.benchSendFile)
}
}
type sendFileBench struct {
chunkSize int
}
func (bench sendFileBench) benchSendFile(b *testing.B) {
fileSize := b.N * bench.chunkSize
f := createTempFile(b, fileSize)
fileName := f.Name()
defer os.Remove(fileName)
defer f.Close()
client, server := spliceTestSocketPair(b, "tcp")
defer server.Close()
cleanUp, err := startSpliceClient(client, "r", bench.chunkSize, fileSize)
if err != nil {
b.Fatal(err)
}
defer cleanUp()
b.ReportAllocs()
b.SetBytes(int64(bench.chunkSize))
b.ResetTimer()
// Data go from file to socket via sendfile(2).
sent, err := io.Copy(server, f)
if err != nil {
b.Fatalf("failed to copy data with sendfile, error: %v", err)
}
if sent != int64(fileSize) {
b.Fatalf("bytes sent mismatch\n\texpect: %d\n\tgot: %d", fileSize, sent)
}
}
func createTempFile(b *testing.B, size int) *os.File {
f, err := os.CreateTemp("", "linux-sendfile-test")
if err != nil {
b.Fatalf("failed to create temporary file: %v", err)
}
data := make([]byte, size)
if _, err := f.Write(data); err != nil {
b.Fatalf("failed to create and feed the file: %v", err)
}
if err := f.Sync(); err != nil {
b.Fatalf("failed to save the file: %v", err)
}
if _, err := f.Seek(0, io.SeekStart); err != nil {
b.Fatalf("failed to rewind the file: %v", err)
}
return f
}
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