Can scarphase grab the code segment according to runtime features?

[JiananYuan]

Hello! I am doing a project related to memory prediction. The project can do some data pre-load according to the regularity of program runtime. I wanna if scarphase can also grab code according to the regularity of runtime. For instance, if the CPI reaches the threshold, then the code which is running is grabbed.
Thanks.

[davidbbs]

I'm sure you can do that since scarphase gets both CPI from performance counters and BBV from PEBS, but it isn't designed to be super-precise, so I'm not sure it's the best way.