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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 fio_test
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"testing"
"gvisor.dev/gvisor/pkg/test/dockerutil"
"gvisor.dev/gvisor/test/benchmarks/harness"
"gvisor.dev/gvisor/test/benchmarks/tools"
)
// BenchmarkFio runs fio on the runtime under test. There are 4 basic test
// cases each run on a tmpfs mount and a bind mount. Fio requires root so that
// caches can be dropped.
func BenchmarkFio(b *testing.B) {
testCases := []tools.Fio{
{
Test: "write",
BlockSize: 4,
IODepth: 4,
},
{
Test: "write",
BlockSize: 1024,
IODepth: 4,
},
{
Test: "read",
BlockSize: 4,
IODepth: 4,
},
{
Test: "read",
BlockSize: 1024,
IODepth: 4,
},
{
Test: "randwrite",
BlockSize: 4,
IODepth: 4,
},
{
Test: "randread",
BlockSize: 4,
IODepth: 4,
},
}
machine, err := harness.GetMachine()
if err != nil {
b.Fatalf("failed to get machine with: %v", err)
}
defer machine.CleanUp()
for _, fsType := range []string{harness.BindFS, harness.TmpFS, harness.RootFS} {
for _, tc := range testCases {
operation := tools.Parameter{
Name: "operation",
Value: tc.Test,
}
blockSize := tools.Parameter{
Name: "blockSize",
Value: fmt.Sprintf("%dK", tc.BlockSize),
}
filesystem := tools.Parameter{
Name: "filesystem",
Value: fsType,
}
name, err := tools.ParametersToName(operation, blockSize, filesystem)
if err != nil {
b.Fatalf("Failed to parser paramters: %v", err)
}
b.Run(name, func(b *testing.B) {
b.StopTimer()
tc.Size = b.N
ctx := context.Background()
container := machine.GetContainer(ctx, b)
defer container.CleanUp(ctx)
mnts, outdir, mountCleanup, err := harness.MakeMount(machine, fsType)
if err != nil {
b.Fatalf("failed to make mount: %v", err)
}
defer mountCleanup()
// Start the container with the mount.
if err := container.Spawn(
ctx, dockerutil.RunOpts{
Image: "benchmarks/fio",
Mounts: mnts,
},
// Sleep on the order of b.N.
"sleep", fmt.Sprintf("%d", 1000*b.N),
); err != nil {
b.Fatalf("failed to start fio container with: %v", err)
}
// Directory and filename inside container where fio will read/write.
outfile := filepath.Join(outdir, "test.txt")
// For reads, we need a file to read so make one inside the container.
if strings.Contains(tc.Test, "read") {
fallocateCmd := fmt.Sprintf("fallocate -l %dK %s", tc.Size, outfile)
if out, err := container.Exec(ctx, dockerutil.ExecOpts{},
strings.Split(fallocateCmd, " ")...); err != nil {
b.Fatalf("failed to create readable file on mount: %v, %s", err, out)
}
}
// Drop caches just before running.
if err := harness.DropCaches(machine); err != nil {
b.Skipf("failed to drop caches with %v. You probably need root.", err)
}
cmd := tc.MakeCmd(outfile)
if err := harness.DropCaches(machine); err != nil {
b.Fatalf("failed to drop caches: %v", err)
}
// Run fio.
b.StartTimer()
data, err := container.Exec(ctx, dockerutil.ExecOpts{}, cmd...)
if err != nil {
b.Fatalf("failed to run cmd %v: %v", cmd, err)
}
b.StopTimer()
tc.Report(b, data)
})
}
}
}
// TestMain is the main method for package fs.
func TestMain(m *testing.M) {
harness.Init()
os.Exit(m.Run())
}
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