Dear all
Interesting blog from Julian and reading the thread on the BeeGFS google
group. Clearly it is early days and it will good to see more benchmarks.
You may be interested in a white paper Rosemary Francis has written about
mitigating the impact of the Meltdown and Spectre fixes
Kind regards
Richard
On 23 January 2018 at 11:00, <io-500-request(a)vi4io.org> wrote:
----------------------------------------------------------------------
Message: 1
Date: Tue, 23 Jan 2018 11:01:38 +0100
From: Julian Kunkel <juliankunkel(a)googlemail.com>
To: io-500(a)vi4io.org
Subject: [IO-500] Impact of KPTI on IO-500 performance
Message-ID:
<CAMcTfv42WN-4+WevNGbGx2ghXX9JP6Pe_RwWqC2Z=5i
HCB-gfQ(a)mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Dear all,
for DKRZ I did some measurements for the performance impact of KPTI on
tmpfs:
http://juliankunkel.blogspot.de/2018/01/impact-of-kpti-on-
io-500-for-dkrz.html
On our system, there is minimal impact -- I also did a latency
analysis (linked in the post).
I'm curious if other people experienced something else.
Regards,
Julian
--
http://wr.informatik.uni-hamburg.de/people/julian_kunkel
------------------------------
Message: 2
Date: Tue, 23 Jan 2018 11:30:59 +0100
From: Sven Breuner <sven.breuner(a)thinkparq.com>
To: io-500(a)vi4io.org
Subject: Re: [IO-500] Impact of KPTI on IO-500 performance
Message-ID: <53e220c7-4580-3d46-176c-2ee1abeba1d0(a)thinkparq.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Hi,
thanks for sharing this, Julian.
The impact of KPTI is definitely one of the frequently asked questions for
us
these days. (Unfortunately it's one of those things where the application
performance impact is difficult to predict, but that shouldn't stop us
from trying.)
Not with the IO-500 benchmark suite, but maybe still interesting for some
people
on this list could be the BeeGFS performance comparison with and without
client-/server-side KPTI on the public BeeGFS user mailing list, provided
by
Guido from Zuse Institute:
https://groups.google.com/forum/#!msg/fhgfs-user/0cxGJDPMxZg/37QcgttzAQAJ
Best regards
Sven
Julian Kunkel wrote on 23.01.2018 11:01:
> Dear all,
> for DKRZ I did some measurements for the performance impact of KPTI on
tmpfs:
>
http://juliankunkel.blogspot.de/2018/01/impact-of-kpti-on-
io-500-for-dkrz.html
>
> On our system, there is minimal impact -- I also did a latency
> analysis (linked in the post).
> I'm curious if other people experienced something else.
>
> Regards,
> Julian
>
--
<
http://www.beegfs.io>
Sven Breuner
/CEO/
*ThinkParQ GmbH*
w:
www.thinkparq.com <
http://www.thinkparq.com> e:
sven.breuner(a)thinkparq.com
<mailto:sven.breuner@thinkparq.com>
<
https://twitter.com/BeeGFS> <
https://www.linkedin.com/in/svenbreuner>
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