David Ahern <dsah...@gmail.com> writes: > > It's a known problem with VMs (Solaris based ldoms and apparently xen > guests as examples). The hypervisor tells perf it has a PMU (see dmesg > | grep Performance) but does not really implement it (no NMIs for > example).
Actually Xen has a PMU model. I've never tested it, but from a quick source review some time ago it seemed reasonable for Arch Perfmon v1, when disabled. If something doesn't work you should report it to the Xen people BTW sampling works with KVM's PMU model; I'm using that occasionally. -Andi -- a...@linux.intel.com -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
