Hello, I have a problem when I used perf in Guest, the count of LLC-loads almost always 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? my environment: CPU was Xeon E5620, 2.4GHz centos 6.3 for both Host and Guest and "-cpu host" option was added when start qemu. I tried both the original kernel of centos6.3 and the latest stable version 3.7.1 Thanks -- 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
