Karim Yaghmour <karim.yaghm...@opersys.com> writes: > Wondering if there's a way for reading perf counters in the kernel. I'd > like to read/record perf counters on ftrace function tracing > entries/exits to provide a rundown of the value of various counters on > function call boundaries.
KVM does it, see arch/x86/kvm/pmu.c. Essentially it would be doing RDPMC. But the overhead will be likely very high, some sampling approach is likely better. -Andi -- a...@linux.intel.com -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
