Re: [PATCH] perf wrong branches event on AMD

[Arnaldo Carvalho de Melo]

Em Thu, Jul 01, 2010 at 03:30:16PM -0400, Vince Weaver escreveu:
> Hello
> 
> while doing some performance counter validation tests on some assembly 
> language programs I noticed that the "branches:u" count was very wrong on 
> AMD machines.
> 
> It looks like the wrong event was selected.
> 
> This is why event selection needs to be in user-space... it could be fixed 
> instantly there, but the way things are done now it will take months to 
> years for this fix to filter down to those trying to use perf counters...

Well, you can use:

  rNNN (see 'perf list --help' on how to encode it) [Raw hardware event descriptor]

In the meantime.

- Arnaldo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/