builder: report run time

dashboard: record run time

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5504054

misc/dashboard/app/build/build.go

@@ -180,6 +180,8 @@ type Result struct {
 	OK      bool
 	Log     string `datastore:"-"`        // for JSON unmarshaling only
 	LogHash string `datastore:",noindex"` // Key to the Log record.
+
+	RunTime int64 // time to build+test in nanoseconds 
 }
 
 func (r *Result) Key(c appengine.Context) *datastore.Key {

misc/dashboard/builder/http.go

@@ -111,7 +111,7 @@ func (b *Builder) todo(kind, pkg, goHash string) (rev string, err error) {
 }
 
 // recordResult sends build results to the dashboard
-func (b *Builder) recordResult(ok bool, pkg, hash, goHash, buildLog string) error {
+func (b *Builder) recordResult(ok bool, pkg, hash, goHash, buildLog string, runTime time.Duration) error {
 	req := obj{
 		"Builder":     b.name,
 		"PackagePath": pkg,
@@ -119,6 +119,7 @@ func (b *Builder) recordResult(ok bool, pkg, hash, goHash, buildLog string) erro
 		"GoHash":      goHash,
 		"OK":          ok,
 		"Log":         buildLog,
+		"RunTime":     runTime,
 	}
 	args := url.Values{"key": {b.key}, "builder": {b.name}}
 	return dash("POST", "result", args, req, nil)

misc/dashboard/builder/main.go

@@ -294,7 +294,9 @@ func (b *Builder) buildHash(hash string) (err error) {
 
 	// build
 	logfile := path.Join(workpath, "build.log")
+	startTime := time.Now()
 	buildLog, status, err := runLog(b.envv(), logfile, srcDir, *buildCmd)
+	runTime := time.Now().Sub(startTime)
 	if err != nil {
 		return fmt.Errorf("%s: %s", *buildCmd, err)
 	}
@@ -309,11 +311,11 @@ func (b *Builder) buildHash(hash string) (err error) {
 
 	if status != 0 {
 		// record failure
-		return b.recordResult(false, "", hash, "", buildLog)
+		return b.recordResult(false, "", hash, "", buildLog, runTime)
 	}
 
 	// record success
-	if err = b.recordResult(true, "", hash, "", ""); err != nil {
+	if err = b.recordResult(true, "", hash, "", "", runTime); err != nil {
 		return fmt.Errorf("recordResult: %s", err)
 	}
 
@@ -378,7 +380,7 @@ func (b *Builder) buildPackages(goRoot, goHash string) {
 		}
 
 		// record the result
-		err = b.recordResult(ok, pkg, hash, goHash, buildLog)
+		err = b.recordResult(ok, pkg, hash, goHash, buildLog, 0)
 		if err != nil {
 			log.Printf("buildPackages %s: %v", pkg, err)
 		}