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Date: Fri, 20 Oct 2017 16:50:04 +0100
From: Ruslan Bukin <ruslan.bukin@cl.cam.ac.uk>
To: Bret Ketchum <bcketchum@gmail.com>
Cc: freebsd-arch@freebsd.org
Subject: Re: PEBS support in hwpmc
Message-ID: <20171020155004.GA54718@bsdpad.com>
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I have not seen that yet. We are working on Intel PT support currently.
But we plan to look at ARM v8.2 Statistical Profiling Extension technology too, which sounds similar to PEBS by Intel ?

Ruslan

On Fri, Oct 20, 2017 at 06:27:55AM -0500, Bret Ketchum wrote:
> All,
> 
>     I apologize if there is a better forum for this question. Is there
> any current effort to support Processor Event Based Sampling in hwpmc?
> Without this support (or a VTune subscription) understanding
> Front-End/Back-End bound applications running on Skylake/Kaby Lake
> processors will be difficult at best. I'm thinking to simply add a
> flag and either add a char to iap_event_descr or increase the size of
> iap_evcode to house the sub-event (EVTSEL). Decoding and reporting the
> captured PEBS records would need a bit more thought.
> 
>     Bret
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