linux-kernel - Re: [PATCH v3 1/2] x86/vdso: Move mult and shift into struct vgtod

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Date:   Thu, 27 Jun 2019 14:21:06 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Sverdlin, Alexander (Nokia - DE/Ulm)" <alexander.sverdlin@...ia.com>
cc:     "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Jason Vas Dias <jason.vas.dias@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Vincenzo Frascino <vincenzo.frascino@....com>
Subject: Re: [PATCH v3 1/2] x86/vdso: Move mult and shift into struct
 vgtod_ts

Alexander,

On Thu, 27 Jun 2019, Sverdlin, Alexander (Nokia - DE/Ulm) wrote:
> On 27/06/2019 14:07, Thomas Gleixner wrote:
> > 
> > Did you use the git tree? If not, it would be interesting to have a test
> > against that as well because that's the final version.
> 
> I've applied the following list:
> 
> 3acf4be23528 (tip/timers/vdso) arm64: vdso: Fix compilation with clang older than 8

> If you expect a difference, I can re-test using your tree as-is.

That's the tip of tree. All good.

> > The increase for mono and realtime is impressive. Which CPU is that?
> 
> This time it was
> 
> processor	: 3
> vendor_id	: AuthenticAMD
> cpu family	: 21
> model		: 96
> model name	: AMD PRO A10-8700B R6, 10 Compute Cores 4C+6G

Interesting. Need to find something similar in my fleet and figure out what
changed that so much.

Thanks!

	tglx