On Mon, Jul 08, 2013 at 10:24:34PM -0400, Vince Weaver wrote: > > So something like they have on ARM? > > vince@pandaboard:/sys/bus/event_source/devices$ ls -l > lrwxrwxrwx 1 root root 0 Jul 8 21:57 ARMv7 Cortex-A9 -> > ../../../devices/ARMv7 Cortex-A9 > lrwxrwxrwx 1 root root 0 Jul 8 21:57 breakpoint -> > ../../../devices/breakpoint > lrwxrwxrwx 1 root root 0 Jul 8 21:57 software -> ../../../devices/software > lrwxrwxrwx 1 root root 0 Jul 8 21:57 tracepoint -> > ../../../devices/tracepoint
Right so what I remember of the ARM case is that their /proc/cpuinfo isn't sufficient to identify their PMU. And they don't have a cpuid like instruction at all. > > For the cpu you can obviously just detect what processor you're on with > > cpuid or whatever, but it's a bit of a hack. And that really doesn't > > work for non-cpu PMUs. > > why is it a hack to use cpuid? I agree, for x86 cpuid is perfectly fine, as would /proc/cpuinfo be, I suspect that just the model number is sufficient in most cases, even for uncore stuff. -- 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/
