From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vincent JARDIN <vincent.jardin-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: Is VFIO driver's performance better than IGB_UIO?
Date: Fri, 08 Aug 2014 09:45:51 +0200
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Cc: "dev-VfR2kkLFssw@public.gmane.org" <dev-VfR2kkLFssw@public.gmane.org>, "Guofeng \(E\)" <wind.guo-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
 "lixiao \(H\)" <lixiao91-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: Linhaifeng <haifeng.lin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
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On 08/08/2014 09:41, Linhaifeng wrote:
> I have test the VFIO driver and IGB_UIO driver by l2fwd for many times.=
 I find that the VFIO driver=A1=AFs performance is not better than the IG=
B_UIO.

You are right, under some conditions UIO is faster, VFIO provides
safety. The best solution is a PMD without UIO, neither VFIO.

which CPU are you using?

Best regards,
  Vincent