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

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Message-ID: <c9a2cd58-13a1-5aab-428c-a59c45f6e0f9@intel.com>
Date:   Mon, 12 Jun 2017 16:04:44 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
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

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?