profiling: Fix downloading tracing profiling data (#6599)

pkg/pprof saves tracing profiling data in a different file name
(trace.out) in contrary to other profiling mode.

cmd/utils.go

@@ -218,18 +218,26 @@ func startProfiler(profilerType, dirPath string) (interface {
 		Stop()
 	}
 
-	// Enable profiler, supported types are [cpu, mem, block].
+	var profilerFileName string
+
+	// Enable profiler and set the name of the file that pkg/pprof
+	// library creates to store profiling data.
 	switch profilerType {
 	case "cpu":
 		profiler = profile.Start(profile.CPUProfile, profile.NoShutdownHook, profile.ProfilePath(dirPath))
+		profilerFileName = "cpu.pprof"
 	case "mem":
 		profiler = profile.Start(profile.MemProfile, profile.NoShutdownHook, profile.ProfilePath(dirPath))
+		profilerFileName = "mem.pprof"
 	case "block":
 		profiler = profile.Start(profile.BlockProfile, profile.NoShutdownHook, profile.ProfilePath(dirPath))
+		profilerFileName = "block.pprof"
 	case "mutex":
 		profiler = profile.Start(profile.MutexProfile, profile.NoShutdownHook, profile.ProfilePath(dirPath))
+		profilerFileName = "mutex.pprof"
 	case "trace":
 		profiler = profile.Start(profile.TraceProfile, profile.NoShutdownHook, profile.ProfilePath(dirPath))
+		profilerFileName = "trace.out"
 	default:
 		return nil, errors.New("profiler type unknown")
 	}
@@ -237,7 +245,7 @@ func startProfiler(profilerType, dirPath string) (interface {
 	return &profilerWrapper{
 		stopFn: profiler.Stop,
 		pathFn: func() string {
-			return filepath.Join(dirPath, profilerType+".pprof")
+			return filepath.Join(dirPath, profilerFileName)
 		},
 	}, nil
 }