From: Paolo Bonzini <pbonzini@redhat.com>
To: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
riel@redhat.com, mtosatti@redhat.com
Subject: Re: [PATCH RFC] kvm: x86: add halt_poll module parameter
Date: Thu, 05 Feb 2015 20:18:40 +0100 [thread overview]
Message-ID: <54D3C210.8030108@redhat.com> (raw)
In-Reply-To: <20150205175344.GB14367@potion.redhat.com>
On 05/02/2015 18:53, Radim Krčmář wrote:
> > 99% of what you get if you use idle=poll in the guest.
>
> (Hm, I would have thought that this can outperform idle=poll ...)
It outperforms idle=poll in the host. A vmexit is probably too cheap to
outperform having idle=poll in the guest.
Paolo
next prev parent reply other threads:[~2015-02-05 19:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-05 16:05 [PATCH RFC] kvm: x86: add halt_poll module parameter Paolo Bonzini
2015-02-05 17:46 ` Rik van Riel
2015-02-05 17:53 ` Radim Krčmář
2015-02-05 19:18 ` Paolo Bonzini [this message]
2015-02-05 18:55 ` Jan Kiszka
2015-02-05 19:20 ` Paolo Bonzini
2015-02-05 19:23 ` Rik van Riel
2015-02-05 20:14 ` Paolo Bonzini
2015-02-05 20:39 ` David Matlack
2015-02-05 21:24 ` Paolo Bonzini
2015-02-05 23:34 ` Marcelo Tosatti
2015-02-05 23:47 ` Marcelo Tosatti
2015-02-06 7:50 ` Paolo Bonzini
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