> I am not interested in older processors, but I think for all recent Intel > processors, there is a fairly simple algorithm to get the frequency using > a couple of MSRs (including MSR_IA32_EBL_CR_POWERON or MSR_FSB_FREQ).
Hmm, maybe make it an own driver that creates the sysfs entries somewhere. I don't think it's useful enough for the main kernel. But what happens during power saving that may lower the frequency? Wouldn't you need update events for that? That might complicate it. > > Don't we already have /sys entries that exits only for certain processors > or platforms? Yes. > I think the Opteron have HYPERTRANSPORT-related events which could be used > to obtain similar metrics. Yes, but you usually don't need the frequency. -Andi _______________________________________________ perfmon mailing list [email protected] http://www.hpl.hp.com/hosted/linux/mail-archives/perfmon/
