WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Performance numbers on PV-on-HVM

Hi,

With latest PV-on-HVM branch 2.6.35-rc5-pvhvm-v7, the network performance results(Using netperf -H <IP address of netserver> -l 100) range from 700Mbps to 730Mbps. Please note that this is similar to the old branch 2.6.34-pvhvm. One difference is that the latest branch is much more stable. The old branch code used to freeze a lot.

Thanks & Regards,
Jagadish

On Mon, Sep 27, 2010 at 9:18 PM, Jagadish Nadimpalli <jagadish.nadimpalli@xxxxxxxxxxxxxxxxxx> wrote:
Hi Stefano,

Thanks a lot for your responses.

Thanks & Regards,
Jagadish


On Mon, Sep 27, 2010 at 6:41 PM, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> wrote:
On Mon, 27 Sep 2010, Jagadish Nadimpalli wrote:
> Did anybody calculate benchmark network performance numbers for PV-on-HVM so that I can compare? The link provided by you
> has some numbers as follows. This don't has the data rate that is transferred via a network interface.
>
> Average Optimal load -j 4 Run (std deviation):
> Elapsed Time 215.307 (10.1294)
> User Time 632.503 (6.4785)
> System Time 115.497 (4.53905)
> Percent CPU 347.333 (15.885)
> Context Switches 43319.7 (2088.39)
>
> Sleeps 48950 (3140.18)
>

I don't think anyone did so far.

> ??
> ??
> I verified the "xm dmesg" and there is no print of "Extended Page Tables (EPT)". Does this mean that the extended page
> table support is not there? Can I enable this through BIOS option? If it can't be enabled using BIOS option, could you
> please let me know the Intel chipset series which has this support.
>
>

I don't think that EPT can be enable/disable via BIOS, probably your
cpu doesn't support it.
The first Intel cpu series to support EPT is Nehalem:

http://en.wikipedia.org/wiki/Nehalem_%28microarchitecture%29

all the new desktops and servers sold today should have ept support, you
can check on the intel website to be sure.


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel