Re: [PATCH 5/5] perf/x86: Add Intel Nehalem-EX uncore support

From: Peter Zijlstra
Date: Wed Jul 04 2012 - 12:53:36 EST

On Thu, 2012-07-05 at 00:00 +0800, Yan, Zheng wrote:
> > Also, how can a single extra register require 192 bits of config space?
> >
> Some events in the M-Box and R-Box require programming up to 3 extra
> registers. For example, the event 0x5 in the R-Box requires programming
> extra registers XBR_SET1_MM_CFG, XBR_SET1_MATCH and XBR_SET1_MATCH.

But shouldn't you then use 3 extra_reg instead of blowing up the one?

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