linux-kernel - Re: [PATCH V2 00/37] perf intel-pt: Power events and PTWRITE

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Date:   Mon, 12 Jun 2017 10:56:05 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 00/37] perf intel-pt: Power events and PTWRITE

Em Mon, Jun 12, 2017 at 04:04:44PM +0300, Adrian Hunter escreveu:
> On 26/05/17 11:17, Adrian Hunter wrote:
> > Hi
> > 
> > Here are some patches to support Intel PT Power events and PTWRITE.
> > Power events report changes to C-state but I have also added support
> > for the existing CBR (core-to-bus ratio) packet and included that
> > when outputting power events.  The PTWRITE packet is associated with
> > the new ptwrite instruction, which is essentially just a way to stuff
> > a 32 or 64 bit value into the PT trace.  More details can be found in
> > the patches that add documentation and in the Intel SDM.
> > 
> > As far as I know, there isn't any hardware released that supports
> > the new packets, however the CBR packet is not new and will now be
> > visible by default.
> > 
> > There are also some miscellaneous improvements to Intel PT.
> > 
> > There are 3 patches that introduce a new way to define synthesized
> > events that carry arbitrary raw_data.  I sent an RFC about that earlier.
> > The 3 patches are:
> >       perf script: Add 'synth' event type for synthesized events
> >       perf script: Add 'synth' field for synthesized event payloads
> >       perf script: Add synthesized Intel PT power and ptwrite events
> > 
> > 
> > Changes in V2:
> > 
> > 	Reorder patches and add stable tags to fixes.
> > 
> 
> Apart from "perf script: Add 'synth' event type for synthesized events"
> patches still apply.  Any comments?

I'll look at it today,

- Arnaldo