> I would like to obtain fore mentioned data from within my module. I need > these performance metrics to see how certain code executes, and make > decisions during the runtime. pmc(3) seems complete, but it also seems to be > intended for use in the userland. > > How to use pmc from modules? Is there any other way? Also, module is amd64 > only, so I don't care about portability.
At this point of time there isn't an in-kernel API for using hwpmc(4) (but it is on the task list, see: http://code.google.com/p/pmctools/issues/detail?id=17). For now, you could configure hwpmc(4) to not touch specific PMC registers using the OP_PMCADMIN request (i.e., use pmccontrol -d). After this you can use those registers from your kernel module without interference from hwpmc. Koshy _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
