85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
// streaming-write-benchmark benchmarks the peformance of writing
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// from /dev/zero on the client to /dev/null on the server via io.Copy.
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package main
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import (
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"flag"
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"fmt"
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"io"
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"log"
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"net"
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"os"
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"syscall"
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"time"
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"golang.org/x/crypto/ssh"
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"golang.org/x/crypto/ssh/agent"
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"github.com/pkg/sftp"
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)
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var (
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USER = flag.String("user", os.Getenv("USER"), "ssh username")
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HOST = flag.String("host", "localhost", "ssh server hostname")
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PORT = flag.Int("port", 22, "ssh server port")
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PASS = flag.String("pass", os.Getenv("SOCKSIE_SSH_PASSWORD"), "ssh password")
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SIZE = flag.Int("s", 1<<15, "set max packet size")
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)
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func init() {
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flag.Parse()
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}
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func main() {
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var auths []ssh.AuthMethod
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if aconn, err := net.Dial("unix", os.Getenv("SSH_AUTH_SOCK")); err == nil {
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auths = append(auths, ssh.PublicKeysCallback(agent.NewClient(aconn).Signers))
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}
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if *PASS != "" {
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auths = append(auths, ssh.Password(*PASS))
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}
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config := ssh.ClientConfig{
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User: *USER,
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Auth: auths,
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}
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addr := fmt.Sprintf("%s:%d", *HOST, *PORT)
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conn, err := ssh.Dial("tcp", addr, &config)
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if err != nil {
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log.Fatalf("unable to connect to [%s]: %v", addr, err)
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}
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defer conn.Close()
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c, err := sftp.NewClient(conn, sftp.MaxPacket(*SIZE))
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if err != nil {
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log.Fatalf("unable to start sftp subsytem: %v", err)
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}
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defer c.Close()
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w, err := c.OpenFile("/dev/null", syscall.O_WRONLY)
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if err != nil {
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log.Fatal(err)
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}
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defer w.Close()
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f, err := os.Open("/dev/zero")
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if err != nil {
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log.Fatal(err)
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}
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defer f.Close()
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const size int64 = 1e9
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log.Printf("writing %v bytes", size)
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t1 := time.Now()
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n, err := io.Copy(w, io.LimitReader(f, size))
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if err != nil {
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log.Fatal(err)
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}
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if n != size {
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log.Fatalf("copy: expected %v bytes, got %d", size, n)
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}
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log.Printf("wrote %v bytes in %s", size, time.Since(t1))
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}
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