On Wed, Dec 19, 2012 at 02:08:07AM +0800, Storm Wang wrote: > Hello guys > > here I have a problem, when I used perf in Guest, the count of LLC-loads > usually returns 0. LLC-loads was a hardware cache event, besides the > setting of general PMU MSR, need to set MSR_OFFCORE_RSP_0 as well, in perf, > it would be the extra_reg and extra_config in "hw_perf_event". I add some > debuginfo in function "read_pmc" and found that when measuring LLC-loads, > pmc->perf_event->hw.extra_reg is 0x0, and the counter's number was always > the same. I think this is the reason, but I can't find when and where the > value changed. > > Anybody has some idea for this? > Currently counters that need extra regs are not supported by KVM PMU emulation. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
