On Tue, 9 Jul 2013, Michael Ellerman wrote: > On Thu, Jul 04, 2013 at 02:57:00PM +0200, Peter Zijlstra wrote: > > > > Right; I think Stephane and Jiri are in favour of creating a 'new' project > > that > > includes just the event definitions in a plain text format and a little > > library > > with parser to be used by all interested parties. > > OK that would be great. > > The part that seems to be missing to make that work is we have no way of > matching the PMU that appears in /sys with a list of events. > > Eg. on my system I have /sys/bus/event_source/devices/cpu - but there's > nothing in there to identify that it's a Sandy Bridge.
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 > 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? People have done event lists in userspace for years. Why must it be the kernel's job? Vince Weaver vincent.wea...@maine.edu http://www.eece.maine.edu/~vweaver/ -- 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/
