// running threads with running Ps.
		ctx.IncThreadStateCount(ctx.elapsed(start), traceviewer.ThreadStateRunning, 1)
	}
	if from.Executing() {
		start := ev.Time()
		viewerEv.Name = "proc stop"
		viewerEv.Ts = ctx.elapsed(start)
		// TODO(mknyszek): We don't have a state machine for threads, so approximate
		// running threads with running Ps.
		ctx.IncThreadStateCount(ctx.elapsed(start), traceviewer.ThreadStateRunning, -1)
	}

		viewerEv.Arg = format.ThreadIDArg{ThreadID: uint64(ev.Thread())}
		viewerEv.Ts = ctx.elapsed(start)
		ctx.IncThreadStateCount(ctx.elapsed(start), traceviewer.ThreadStateRunning, 1)
	}
	if from.Executing() {
		start := ev.Time()
		viewerEv.Name = "proc stop"
		viewerEv.Ts = ctx.elapsed(start)
		ctx.IncThreadStateCount(ctx.elapsed(start), traceviewer.ThreadStateRunning, -1)

		// Check if this proc was in a syscall before it stopped.