From: Paolo Bonzini <pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: "Wu, Feng" <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Zhang,
Yang Z" <yang.z.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Alex Williamson
<alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: "kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"gleb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<gleb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
"mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org"
<mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org"
<hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
"tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org"
<tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
"dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org"
<dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Subject: Re: [PATCH 05/13] KVM: Update IRTE according to guest interrupt configuration changes
Date: Wed, 12 Nov 2014 10:56:26 +0100 [thread overview]
Message-ID: <54632ECA.4070903@redhat.com> (raw)
In-Reply-To: <E959C4978C3B6342920538CF579893F00227680F-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
On 12/11/2014 10:19, Wu, Feng wrote:
>> You can certainly backport these patches to distros that do not have
>> VFIO. But upstream we should work on VFIO first. VFIO has feature
>> parity with legacy device assignment, and adding a new feature that is
>> not in VFIO would be a bad idea.
>>
>> By the way, do you have benchmark results for it? We have not been able
>> to see any performance improvement for APICv on e.g. netperf.
>
> Do you mean benchmark results for APICv itself or VT-d Posted-Interrtups?
Especially for VT-d posted interrupts---but it'd be great to know which
workloads see the biggest speedup from APICv.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: "Wu, Feng" <feng.wu@intel.com>,
"Zhang, Yang Z" <yang.z.zhang@intel.com>,
Alex Williamson <alex.williamson@redhat.com>
Cc: "gleb@kernel.org" <gleb@kernel.org>,
"dwmw2@infradead.org" <dwmw2@infradead.org>,
"joro@8bytes.org" <joro@8bytes.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 05/13] KVM: Update IRTE according to guest interrupt configuration changes
Date: Wed, 12 Nov 2014 10:56:26 +0100 [thread overview]
Message-ID: <54632ECA.4070903@redhat.com> (raw)
In-Reply-To: <E959C4978C3B6342920538CF579893F00227680F@SHSMSX104.ccr.corp.intel.com>
On 12/11/2014 10:19, Wu, Feng wrote:
>> You can certainly backport these patches to distros that do not have
>> VFIO. But upstream we should work on VFIO first. VFIO has feature
>> parity with legacy device assignment, and adding a new feature that is
>> not in VFIO would be a bad idea.
>>
>> By the way, do you have benchmark results for it? We have not been able
>> to see any performance improvement for APICv on e.g. netperf.
>
> Do you mean benchmark results for APICv itself or VT-d Posted-Interrtups?
Especially for VT-d posted interrupts---but it'd be great to know which
workloads see the biggest speedup from APICv.
Paolo
next prev parent reply other threads:[~2014-11-12 9:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-11 9:20 [PATCH 05/13] KVM: Update IRTE according to guest interrupt configuration changes Wu, Feng
2014-11-11 9:20 ` Wu, Feng
2014-11-11 11:01 ` Paolo Bonzini
[not found] ` <5461EC99.1000101-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-11-11 12:28 ` Wu, Feng
2014-11-11 12:28 ` Wu, Feng
2014-11-12 3:42 ` Zhang, Yang Z
2014-11-12 3:42 ` Zhang, Yang Z
[not found] ` <A9667DDFB95DB7438FA9D7D576C3D87E0ABDBB25-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-12 9:14 ` Paolo Bonzini
2014-11-12 9:14 ` Paolo Bonzini
[not found] ` <546324F4.8010002-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-11-12 9:19 ` Wu, Feng
2014-11-12 9:19 ` Wu, Feng
[not found] ` <E959C4978C3B6342920538CF579893F00227680F-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-12 9:56 ` Paolo Bonzini [this message]
2014-11-12 9:56 ` Paolo Bonzini
[not found] ` <54632ECA.4070903-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-11-13 1:14 ` Wu, Feng
2014-11-13 1:14 ` Wu, Feng
[not found] ` <E959C4978C3B6342920538CF579893F002284398-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-13 1:21 ` Zhang, Yang Z
2014-11-13 1:21 ` Zhang, Yang Z
[not found] ` <A9667DDFB95DB7438FA9D7D576C3D87E0ABE5A68-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-13 1:30 ` Wu, Feng
2014-11-13 1:30 ` Wu, Feng
[not found] ` <E959C4978C3B6342920538CF579893F00228443D-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-13 1:46 ` Zhang, Yang Z
2014-11-13 1:46 ` Zhang, Yang Z
2014-11-12 17:11 ` Alex Williamson
2014-11-12 17:11 ` Alex Williamson
[not found] ` <1415812284.16601.372.camel-85EaTFmN5p//9pzu0YdTqQ@public.gmane.org>
2014-11-13 11:39 ` Wu, Feng
-- strict thread matches above, loose matches on Subject: below --
2014-11-11 13:02 Wu, Feng
2014-11-11 13:02 ` Wu, Feng
2014-11-11 11:22 Wu, Feng
2014-11-11 11:22 ` Wu, Feng
2014-11-10 6:26 [PATCH 00/13] Add VT-d Posted-Interrupts support for KVM Feng Wu
[not found] ` <1415600812-27773-1-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-11-10 6:26 ` [PATCH 05/13] KVM: Update IRTE according to guest interrupt configuration changes Feng Wu
2014-11-10 6:26 ` Feng Wu
[not found] ` <1415600812-27773-6-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-11-10 21:57 ` Alex Williamson
2014-11-10 21:57 ` Alex Williamson
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