On Tue, 29 Oct 2013, Peter Zijlstra wrote:
> On Tue, Oct 29, 2013 at 11:21:31AM +0100, Peter Zijlstra wrote:
> --- linux-2.6.orig/include/uapi/linux/perf_event.h
> +++ linux-2.6/include/uapi/linux/perf_event.h
> @@ -479,13 +479,15 @@ struct perf_event_mmap_page {
> /*
>* Control data
On Mon, 12 Aug 2013, Michael Ellerman wrote:
>
> Yes I think so. The interface is already defined and it's little endian,
> so on big endian we just need to swap.
>
> The only part I'm not clear on is how things are handled in perf
> userspace, it seems to already do some byte swapping.
It would
On Sat, 10 Aug 2013, Sukadev Bhattiprolu wrote:
>
> include/uapi/linux/perf_event.h | 55
> +++
> 1 files changed, 55 insertions(+), 0 deletions(-)
> +#define __PERF_LE1234
> +#define __PERF_BE4321
> +
> +#if defined(__KERNEL__)
I could be wrong,
On Thu, 11 Jul 2013, Will Deacon wrote:
> On Tue, Jul 09, 2013 at 04:05:30PM +0100, Vince Weaver wrote:
> > libpfm4 uses the
> >CPU part : 0xc09
> > line in /proc/cpuinfo on ARM, and that's enough for the processors PAPI
>
> The CPU part you cite is actua
On Wed, 10 Jul 2013, Ingo Molnar wrote:
> Exactly - PMUs enumerated in /sys should be self-identifying, it's a
> hardware topology after all ...
>
> Anytime userspace is forced to look into /proc, or into weird places in
> /sys it's a FAIL really.
well on x86 you have to look at /proc/cpuinfo
On Tue, 9 Jul 2013, Michael Ellerman wrote:
> On Mon, Jul 08, 2013 at 10:24:34PM -0400, Vince Weaver wrote:
> > why is it a hack to use cpuid?
>
> Because you're assuming that the PMU the kernel has exposed is for the
> cpu you happen to be executing on.
>
> But the
On Tue, 9 Jul 2013, Peter Zijlstra wrote:
> 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 C
ously 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 Weav
On Tue, 25 Jun 2013, Runzhen Wang wrote:
> This patch makes all the POWER7 events available in sysfs.
>
> ...
>
> $ size arch/powerpc/perf/power7-pmu.o
>text data bss dec hex filename
>3073 2720 0579316a1 arch/powerpc/perf/power7-pmu.o
>
> and
