On Wed, Sep 11, 2013 at 08:22:22AM -0700, Stephane Eranian wrote: > > The IvyBridge event CYCLE_ACTIVITY:CYCLES_LDM_PENDING can only > be measured on counters 0-3 when HT is off. When HT is on, you > only have counters 0-3. > > If you program it on the eight counters for 1s on a 3GHz > IVB laptop running a noploop, you see: > > 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING > > Clearly the last 4 values are bogus.
Thanks looks good. Likely need it on Haswell too? -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
