From: Paolo Bonzini <pbonzini@redhat.com>
To: Denis Plotnikov <dplotnikov@virtuozzo.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: rkrcmar@redhat.com, rkagan@virtuozzo.com
Subject: Re: [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT
Date: Mon, 19 Dec 2016 15:30:17 +0100 [thread overview]
Message-ID: <672a23fe-3df7-dd1b-27ee-4b453ca33236@redhat.com> (raw)
In-Reply-To: <e805e616-f840-8cb2-3133-4557c80afff9@virtuozzo.com>
On 19/12/2016 14:05, Denis Plotnikov wrote:
>>
> This new patch-set does avoid unnecessary interrupt re-injections -
> checked.
>
> The test (MS Windows, sending messages between multiple windows using
> windows-specific interface),
> which showed performance growth with "[PATCH v2] KVM: x86: avoid
> redundant REQ_EVENT" showed pretty much the same performance level with
> this new patch-set.
> The test score difference (+2.4% to [PATCH v2]) is within the tolerance
> range(5%).
>
> The test score on mainstream v4.9 kernel CPU Intel i5-2400, guest
> Windows Server 2012 2VCPU, 2GB:
>
> without patch: 31510 (+/- 4%)
> with patch: 36270 (+/- 5%)
>
> difference = (36270-31510)/31510 * 100 = +15% -- looks good!
Awesome! I hope it also qualifies as less ugly. :)
Paolo
next prev parent reply other threads:[~2016-12-19 14:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 9:47 [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT Paolo Bonzini
2016-12-19 9:47 ` [PATCH 1/6] KVM: x86: add VCPU stat for KVM_REQ_EVENT processing Paolo Bonzini
[not found] ` <20161220092101.GE2081@rkaganb.sw.ru>
2016-12-20 9:32 ` Paolo Bonzini
2016-12-19 9:47 ` [PATCH 2/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on EOI Paolo Bonzini
2016-12-23 12:08 ` Paolo Bonzini
2016-12-19 9:47 ` [PATCH 3/6] KVM: vmx: speed up TPR below threshold vmexits Paolo Bonzini
2016-12-19 9:47 ` [PATCH 4/6] KVM: lapic: avoid unnecessary KVM_REQ_EVENT on IRR scan Paolo Bonzini
2016-12-19 9:47 ` [PATCH 5/6] KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update Paolo Bonzini
2016-12-19 9:47 ` [PATCH 6/6] KVM: lapic: do not scan IRR when delivering an interrupt Paolo Bonzini
2016-12-20 17:11 ` Paolo Bonzini
2016-12-19 13:05 ` [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT Denis Plotnikov
2016-12-19 14:30 ` Paolo Bonzini [this message]
2016-12-20 10:01 ` Roman Kagan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=672a23fe-3df7-dd1b-27ee-4b453ca33236@redhat.com \
--to=pbonzini@redhat.com \
--cc=dplotnikov@virtuozzo.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rkagan@virtuozzo.com \
--cc=rkrcmar@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).