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From: Victor fernandez <Victormanuel.fernandez@usc.es>
To: kvm@vger.kernel.org
Subject: Re: Lost of performance over AMD-V with KVM?
Date: Tue, 09 Jul 2013 16:42:59 +0200	[thread overview]
Message-ID: <51DC2173.30605@usc.es> (raw)
In-Reply-To: <51DC001B.2010703@usc.es>

Hi Gleb,

     there are flags that with the tuning of KVM (-cpu host) we get that 
some of
     important cpu flags are not included in SL6 ( Ht, rdtscp, 3dnowext, 
3dnow,
constant_tsc,nonstop_tsc,amd_dcm,monitor,svm,extapic,osvw,ibs,skinit,wdt,nodeid_msr).

     And the machines used for testing were 2 nodes AMD 6128 - 2Ghz - 2 
CPUs
     (8 Cores/CPU Core - 1GB) 16 Cores Total - 16 GB RAM for AMD-V 
virtualization,
     and we did the same tests with the same software versions with 2 
nodes of DELL
     PowerEdge SC1950, biprocessors dual core, 2 Xeon(R) CPU 5160 @ 
3.00GHz,
     16GB RAM. for Intel VT virtualization. And with Intel technology we 
get the
     typical virtualization performance, around 2-5% of lost.

      Thanks in advance,
         Víctor Fdez.

      parent reply	other threads:[~2013-07-09 14:43 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-09 12:20 Lost of performance over AMD-V with KVM? Victor fernandez
2013-07-09 13:33 ` Gleb Natapov
     [not found]   ` <51DC1EC4.4000001@usc.es>
2013-07-09 14:47     ` Gleb Natapov
     [not found]       ` <51DC24C9.8080700@usc.es>
2013-07-09 15:00         ` Gleb Natapov
     [not found]           ` <51DC274D.8090409@usc.es>
2013-07-09 15:16             ` Gleb Natapov
     [not found]               ` <51DC2C92.4020605@usc.es>
2013-07-09 16:08                 ` Gleb Natapov
2013-07-11 12:52                   ` Victor fernandez
2013-07-11 14:07                     ` Gleb Natapov
     [not found]                       ` <51DEC106.4040300@usc.es>
2013-07-11 14:43                         ` Gleb Natapov
2013-07-09 15:17           ` Victor fernandez
2013-07-09 14:42 ` Victor fernandez [this message]

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