>Currently counters that need extra regs are not supported by KVM PMU >emulation Thank you, Gleb. But actually only 1% chance, I got the LLC-loads count nonzero, I really have no idea why this happend. On Wed, Dec 19, 2012 at 8:49 PM, Gleb Natapov <gleb@xxxxxxxxxx> wrote: > 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
