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Message-ID: <88678a872bfdd8d7477c374a2ab1ee9dd9324ec0.camel@suse.com>
Subject: Re: [Xen-devel] [RFC][PATCH] KVM: APPLES can improve the
 performance of applications and virtualized systems by up to 49%
From:   Dario Faggioli <dfaggioli@suse.com>
To:     Weiwei Jia <harrynjit@gmail.com>, linux-kernel@vger.kernel.org
Cc:     xen-devel@lists.xenproject.org, Weiwei Jia <harryxiyou@gmail.com>,
        jianchen.shan@gmail.com, kvm@vger.kernel.org, dingxn@gmail.com
Date:   Thu, 17 May 2018 18:52:23 +0200
In-Reply-To: <CA+scX6kYH8Y9_f1PLcMHG-MD9bhXgd4gGpkJanjzvwwj9L=aOQ@mail.gmail.com>
References: <CA+scX6kYH8Y9_f1PLcMHG-MD9bhXgd4gGpkJanjzvwwj9L=aOQ@mail.gmail.com>
Organization: SUSE
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On Sat, 2018-05-12 at 16:27 +0800, Weiwei Jia wrote:
> We already have a prototype implementation based on KVM (Linux Kernel
> 3.19.8). Our patch for Linux Kernel 3.19.8 and the paper describing
> our idea are available in Github repository [1][2][3]. We are pleased
> to revise our patch in order to merge it into Linux/KVM and XEN. We
> hope that you can test and adopt our approach/techniques. We are
> pleased to get some comments/suggestions on the approach and on how
> the idea can be adopted/tested by Linux/KVM and XEN. Thank you.
>=20
To see how this is being handled in Xen currently, I suggest you to
grep for:
 ple_gap
 ple_window
 SECONDARY_EXEC_PAUSE_LOOP_EXITING
 EXIT_REASON_PAUSE_INSTRUCTION
 pauseloop_exits

I am aware of your paper, but I haven't got to being able to read it
carefully yet. I'll do that (but can't promise when).

Regards,
Dario
--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Software Engineer @ SUSE https://www.suse.com/
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