Re: [Xen-users] Bad Xen RAM Performance

[Martin Probst <probst@xxxxxxxxxxxxxxxxx>]

Hello,

no, I haven't tried this. I'll test it next days. My XEN Version is 4.1.2

i.A. Martin Probst

Informatik Team GmbH
Allensteiner Strasse 79
56566 Neuwied

Tel.: 02631/9692-15
Fax.: 02631/9692-20
www.informatikteam.de

Finanzamt Neuwied:
Steuer-Nr.: 32/660/1524/9

GeschÃftsfÃhrer:
JÃrgen A. Boos; Utz Hafner
HRB 14034; AG Montabaur

-----UrsprÃngliche Nachricht-----
Von:    CobraHost Support <cobrahost@xxxxxxxxxxxxx>
Gesendet:       So 05.08.2012 17:14
Betreff:        RE: [Xen-users] Bad Xen RAM Performance
An:     Martin Probst <probst@xxxxxxxxxxxxxxxxx>; 
> Hello,
> 
> Have you tried to limit the dom0 to 1 or 2 cpu cores also have you tried to 
> limit the dom0's mem?
> 
> Also what is your XEN Version?
> 
> > From: probst@xxxxxxxxxxxxxxxxx
> > To: xen-users@xxxxxxxxxxxxx
> > Date: Sun, 5 Aug 2012 11:10:26 +0200
> > Subject: [Xen-users] Bad Xen RAM Performance
> > 
> > Hello there,
> > 
> > I have bad performance on a special DomU application. I did some benchmarks 
> and wonder about bad RAM performance at my DomU. First I used Passmark 
> because 
> the application Maintainer requests it. The Values âRead cachedâ, âRead 
> uncachedâ and âLarge memoryâ are very bad. To compare Dom0 and DomU, I setup 
> a 
> second DomU with linux and check them with ramspeed (a cache and memory 
> benchmarking tool) for linux and other. I run several ramspeed test on dom0 
> and 
> my linux and windows domUs. The test results on the DomUs were only about 
> half 
> as good as on Dom0.
> > 
> > Is there a way to increase the RAM performance on DomU? Do you have such 
> problems, too?
> > 
> > My setup:
> > 
> > Dom0:
> > HP DL360g7
> > CPU: 1x Xeon E5645 @ 2.4 GHz (six core CPU)
> > RAM: 16 GB DDR3 RDIMM @ 1333MHz ECC
> > HDD: 2x 300 GB SAS 10k RAID I
> > OS: SLES11 SP2 with XEN 4.1.2 from suse
> > 
> > DomU:
> > Windows 2008 R2 64bit
> > CPUs: 4
> > RAM: 8GB
> > Virtual Disk configured with LVM
> > 
> > At the moment, no other DomUs running.
> > 
> > 
> > Thanks
> > Martin
> > 
> > 
> > i.A. Martin Probst
> > 
> > Informatik Team GmbH
> > Allensteiner Strasse 79
> > 56566 Neuwied
> > 
> > Tel.: 02631/9692-15
> > Fax.: 02631/9692-20
> > www.informatikteam.de
> > 
> > Finanzamt Neuwied:
> > Steuer-Nr.: 32/660/1524/9
> > 
> > GeschÃftsfÃhrer:
> > JÃrgen A. Boos; Utz Hafner
> > HRB 14034; AG Montabaur
> > 
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxx
> > http://lists.xen.org/xen-users
>  
>

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