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package benchmark
import (
"context"
"database/sql"
"errors"
"fmt"
"os"
"path"
"time"
"github.com/cowsql/go-cowsql/app"
"github.com/cowsql/go-cowsql/client"
)
const (
kvSchema = "CREATE TABLE IF NOT EXISTS model (key TEXT, value TEXT, UNIQUE(key))"
)
type Benchmark struct {
app *app.App
db *sql.DB
dir string
options *options
workers []*worker
}
func createWorkers(o *options) []*worker {
workers := make([]*worker, o.nWorkers)
for i := 0; i < o.nWorkers; i++ {
switch o.workload {
case kvWrite:
workers[i] = newWorker(kvWriter, o)
case kvReadWrite:
workers[i] = newWorker(kvReaderWriter, o)
}
}
return workers
}
func New(app *app.App, db *sql.DB, dir string, options ...Option) (bm *Benchmark, err error) {
o := defaultOptions()
for _, option := range options {
option(o)
}
bm = &Benchmark{
app: app,
db: db,
dir: dir,
options: o,
workers: createWorkers(o),
}
return bm, nil
}
func (bm *Benchmark) runWorkload(ctx context.Context) {
for _, worker := range bm.workers {
go worker.run(ctx, bm.db)
}
}
func (bm *Benchmark) kvSetup() error {
_, err := bm.db.Exec(kvSchema)
return err
}
func (bm *Benchmark) setup() error {
switch bm.options.workload {
default:
return bm.kvSetup()
}
}
func reportName(id int, work work) string {
return fmt.Sprintf("%d-%s-%d", id, work, time.Now().Unix())
}
// Returns a map of filename to filecontent
func (bm *Benchmark) reportFiles() map[string]string {
allReports := make(map[string]string)
for i, worker := range bm.workers {
reports := worker.report()
for w, report := range reports {
file := reportName(i, w)
allReports[file] = fmt.Sprintf("%s", report)
}
}
return allReports
}
func (bm *Benchmark) reportResults() error {
dir := path.Join(bm.dir, "results")
if err := os.MkdirAll(dir, 0755); err != nil {
return fmt.Errorf("failed to create %v: %v", dir, err)
}
reports := bm.reportFiles()
for filename, content := range reports {
f, err := os.Create(path.Join(dir, filename))
if err != nil {
return fmt.Errorf("failed to create %v in %v: %v", filename, dir, err)
}
_, err = f.WriteString(content)
if err != nil {
return fmt.Errorf("failed to write %v in %v: %v", filename, dir, err)
}
f.Sync()
}
return nil
}
func (bm *Benchmark) nodeOnline(node *client.NodeInfo) bool {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
defer cancel()
cli, err := client.New(ctx, node.Address)
if err != nil {
return false
}
cli.Close()
return true
}
func (bm *Benchmark) allNodesOnline(ctx context.Context, cancel context.CancelFunc) {
for {
if errors.Is(ctx.Err(), context.DeadlineExceeded) {
return
}
cli, err := bm.app.Client(ctx)
if err != nil {
continue
}
nodes, err := cli.Cluster(ctx)
if err != nil {
continue
}
cli.Close()
n := 0
for _, needed := range bm.options.cluster {
for _, present := range nodes {
if needed == present.Address && bm.nodeOnline(&present) {
n += 1
}
}
}
if len(bm.options.cluster) == n {
cancel()
return
}
}
}
func (bm *Benchmark) waitForCluster(ch <-chan os.Signal) error {
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(bm.options.clusterTimeout))
defer cancel()
go bm.allNodesOnline(ctx, cancel)
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.Canceled) {
return fmt.Errorf("timed out waiting for cluster: %v", ctx.Err())
}
return nil
case <-ch:
return fmt.Errorf("benchmark stopped, signal received while waiting for cluster")
}
}
func (bm *Benchmark) Run(ch <-chan os.Signal) error {
if err := bm.setup(); err != nil {
return err
}
if err := bm.waitForCluster(ch); err != nil {
return err
}
ctx, cancel := context.WithTimeout(context.Background(), bm.options.duration)
defer cancel()
bm.runWorkload(ctx)
select {
case <-ctx.Done():
break
case <-ch:
cancel()
break
}
if err := bm.reportResults(); err != nil {
return err
}
fmt.Printf("Benchmark done. Results available here:\n%s\n", path.Join(bm.dir, "results"))
return nil
}
|
