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