On Sat, Mar 14, 2009 at 09:45:51AM +1100, Benjamin Herrenschmidt wrote: > >> If these applications are aware they are heavy users (of FP, VMX, VSX) >> can we not use a sysctl()? Doing so wouldn't be that difficult. >> >> I think trying to do something based on a runtime heuristic sounds a >> bit iffy. > >Another option might be simply to say that if an app has used FP, VMX or >VSX -once-, then it's likely to do it again and just keep re-enabling >it :-) > >I'm serious here, do we know that many cases where these things are used >seldomly once in a while ?
This seems reasonable to me. >An if we do, maybe then a simple counter in the task struct... if the >app re-enables it more than a few consecutive switches, then make it >stick. I have the feeling that would work out reasonably well. Gee. That sounds like a runtime heuristic :) josh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
