Display ETW messages as graphs in wpa\xperf

Hi 

I have some ETW message logging turned on in my kernel mode driver. I can view it as data in Xperf by going to the "generate summary table". While this works most of the time, I would also like to see this data as simple line graph (like rest of the metrics) in xperf (or WPA). Do I have to change how I am logging my ETW messages or is there a way to configure xperf to get these graphs? 

Thanks

Srikar