linux-kernel - Re: [PATCH 0/5] perf: Add support for hardware breakpoint address masks

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Message-ID: <20130416093620.GH9569@gmail.com>
Date:	Tue, 16 Apr 2013 11:36:20 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Jacob Shin <jacob.shin@....com>,
	Fr??d??ric Weisbecker <fweisbec@...il.com>,
	Oleg Nesterov <oleg@...hat.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	Stephane Eranian <eranian@...gle.com>,
	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] perf: Add support for hardware breakpoint address
 masks


* Jacob Shin <jacob.shin@....com> 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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