From: Nadav Har'El <nyh@math.technion.ac.il>
To: Chegu Vinod <chegu_vinod@hp.com>
Cc: kvm@vger.kernel.org
Subject: Re: Networking performance on a KVM Host (with no guests)
Date: Sun, 22 Apr 2012 14:09:04 +0300 [thread overview]
Message-ID: <20120422110904.GA29760@fermat.math.technion.ac.il> (raw)
In-Reply-To: <loom.20120421T022448-352@post.gmane.org>
On Sat, Apr 21, 2012, Chegu Vinod wrote about "Re: Networking performance on a KVM Host (with no guests)":
> some traffic through between the hosts... then we can't expect to get line rate
> on that private NIC.
If you're not using device assignment, then just disable intel_iommu.
If you *are* using device assignment, try setting intel_iommu to something
other then on. Maybe intel_iommu=pt will work (see
http://lwn.net/Articles/329174/). But I actually never tried this myself -
so let me know if it works ;-)
Is anyone else aware of a different "best practice", on how to enable
VT-d for device assignment, without any changes (in performance or
security) in the host?
--
Nadav Har'El | Sunday, Apr 22 2012,
nyh@math.technion.ac.il |-----------------------------------------
Phone +972-523-790466, ICQ 13349191 |Sign in zoo: Do not feed the animals. If
http://nadav.harel.org.il |you have food give it to the guard on duty
prev parent reply other threads:[~2012-04-22 11:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-19 3:53 Networking performance on a KVM Host (with no guests) Chegu Vinod
2012-04-19 5:43 ` Gleb Natapov
2012-04-19 6:42 ` Jean-Philippe Menil
2012-04-20 14:15 ` Chegu Vinod
2012-04-20 19:35 ` Nadav Har'El
2012-04-21 0:30 ` Chegu Vinod
2012-04-22 11:09 ` Nadav Har'El [this message]
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