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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 27 Jun 2017 12:27:18 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        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 10:56:05AM -0300, Arnaldo Carvalho de Melo escreveu:
> 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,

Applied, will do some testing on a Kaby Lake machine before pushing to
Ingo, will leave in my tmp.perf/core branch before that.

- Arnaldo