Re: [Xen-devel] Xentrace on Xilinx ARM

[Ben Sanda <Ben.Sanda@xxxxxxxxxxxxxxx>]

Dario,

Thank you very much for the help. I apologize for the HTML output on
the first email, I thought I had outlook set to send it in plain text.
My mistake. 

> Well, in this other thread, Paul (Cc-ed) says he basically has tracing 
> working on ARM:

> http://lists.xenproject.org/archives/html/xen-devel/2016-02/msg03373.html

I hadn't found that thread by Paul thank you for pointing it out. I would be 
eager to
see what additional changes he had to make to get it actually working.
It sounds like we headed down the same path, but there's more needed
that I'm unaware of.

Paul, I would be eager to see what changes you had to make to get
xentrace working on ARM and compare that against what I've tried. If
we could push up a formal patch that would be excellent.

Thanks,
Ben

-----Original Message-----
From: Dario Faggioli [mailto:dario.faggioli@xxxxxxxxxx] 
Sent: 05 March, 2016 10:43
To: Ben Sanda <Ben.Sanda@xxxxxxxxxxxxxxx>; xen-devel@xxxxxxxxxxxxx
Cc: Paul Sujkov <psujkov@xxxxxxxxx>
Subject: Re: [Xen-devel] Xentrace on Xilinx ARM

On Fri, 2016-03-04 at 20:53 +0000, Ben Sanda wrote:
> Hello,
>  
Hello,

first of all, please, use plain text instead of HTML for emails to this list.

> My name is Ben Sanda, I’m a kernel/firmware developer with DornerWorks 
> engineering. Our team is working on support for Xen on the new Xilinx
> Ultrascale+ MPSoC platforms (ARM A53 core) and I’ve specifically been
> tasked
> with characterizing performance, particularly that of the schedulers.
> I wanted
> to make use of the xentrace tool to help give us some timing and 
> performance benchmarks, but searching over the Xen mailing lists it 
> appears xentrace has not yet been ported to ARM.
>
No, tracing support for ARM is not present upstream
 
> In searching for existing topics on this my main reference thread for 
> this has been the “[Xen-devel] xentrace, arm, hvm” email chain started 
> by Pavlo Suikov
> here: http://xen.markmail.org/thread/zochggqxcifs5cdi
> 
Well, in this other thread, Paul (Cc-ed) says he basically has tracing working 
on ARM:

http://lists.xenproject.org/archives/html/xen-devel/2016-02/msg03373.html

Any chance you maybe to can cooperate to get such support upstream?
That would be reallyy cool. :-)

Regards,
Dario
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, 
Citrix Systems R&D Ltd., Cambridge (UK)

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