Infocube load time

Hi,

Does anybody knows how I can find what is the exact load time for loading a infocube? I mean after the request is loaded in manage on the Header Tab page I can see Valid Per. But is that the actual load time. Is there any stat table which can give me total load time by request?

I am talking about loading and activating requests only. Not dropping index or rolling up or compression. Just the time elapsed between infopackage is triggered and request becomes green in cube.

Thanks a lot...