Re: [PATCH 0/5] perf: Add support for hardware breakpoint addressmasks

From: Ingo Molnar
Date: Tue Apr 16 2013 - 05:36:28 EST



* Jacob Shin <jacob.shin@xxxxxxx> wrote:

> On Tue, Apr 09, 2013 at 12:21:48PM -0500, Jacob Shin wrote:
> > The following patchset adds address masks to existing perf hardware
> > breakpoint mechanism to allow trapping on an address range (currently
> > only single address) on supported architectures.
> >
> > perf uapi is updated, x86 AMD implementation (for AMD Family 16h and
> > beyond) is provided, and perf tool has been extended to do:
> >
> > $ perf stat -e mem:0x1000:w:0xf a.out
> > ^^^
> > "don't care" bit mask
> >
> > which will count writes to [0x1000 ~ 0x1010)
>
> Ping .. Ingo?

breakpoint patches usually come to me through (or with the acks of) Frederic
and/or Oleg.

Frederic, Oleg, mind having a look?

Thanks,

Ingo
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