From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jagadish Nadimpalli Subject: Re: Performance numbers on PV-on-HVM Date: Mon, 27 Sep 2010 21:18:37 +0530 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1333542731==" Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Stefano Stabellini Cc: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org --===============1333542731== Content-Type: multipart/alternative; boundary=001636c598a5624f7804913fa9c9 --001636c598a5624f7804913fa9c9 Content-Type: text/plain; charset=ISO-8859-1 Hi Stefano, Thanks a lot for your responses. Thanks & Regards, Jagadish On Mon, Sep 27, 2010 at 6:41 PM, Stefano Stabellini < stefano.stabellini@eu.citrix.com> 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. > --001636c598a5624f7804913fa9c9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Stefano,

Thanks a lot for your responses.

Thanks & Reg= ards,
Jagadish

On Mon, Sep 27, 2010 at= 6:41 PM, Stefano Stabellini <stefano.stabellini@eu.citrix.com>= wrote:
On Mon, 27 Sep 2010, Jagadish Nadimpalli wrote:
> Did anybody calculate benchmark network perfor= mance 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 ex= tended 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 y= our
cpu doesn't support it.
The first Intel cpu series to support EPT is Nehalem:

http://en.wikipedia.org/wiki/Nehalem_%28microarchitecture%2= 9

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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