---------------------------------------------------------------------- Message: 1 Date: Tue, 23 Jan 2018 11:01:38 +0100 From: Julian Kunkel <juliankunkel(a)googlemail.com&gt; 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&gt; 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&gt; 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&gt; 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> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.vi4io.org/pipermail/io-500/attachments/ 20180123/8497a5e9/attachment-0001.html> ------------------------------ Subject: Digest Footer _______________________________________________ IO-500 mailing list IO-500(a)vi4io.org https://www.vi4io.org/cgi-bin/mailman/listinfo/io-500 ------------------------------ End of IO-500 Digest, Vol 13, Issue 1 *************************************