Anyone know if any Dell Desktops support VT-X extensions? I see that they (the XPS 600 and 400) can come with 9xx Pentium D chips, and the 945P chipsets. But has anyone verified that the BIOS updates available include VT-X support? In general - is there a good place to look for machines that support VT-X? I see http://wiki.xensource.com/xenwiki/IntelVT but there''s not much there. Thanks - _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mar 13, 2006, at 12:31 PM, Luke wrote:> Anyone know if any Dell Desktops support VT-X extensions? I see > that they (the XPS 600 and 400) can come with 9xx Pentium D chips, > and the 945P chipsets. But has anyone verified that the BIOS > updates available include VT-X support?Same question on the Dell server line, do any of them support VT yet? _Scott _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Luke <secureboot@gmail.com> writes:> Anyone know if any Dell Desktops support VT-X extensions? I see that > they (the XPS 600 and 400) can come with 9xx Pentium D chips, and > the 945P chipsets. But has anyone verified that the BIOS updates > available include VT-X support?Yes, the Dimension 9150/XPS 400 BIOS has VT support starting with version A03. Regards, -- Daniel Néri <daniel.neri@sigicom.se> Sigicom AB, Stockholm, Sweden _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Well, it took me a while to get power hooked up for the new Dell 1850 dual dual-core EM64T box, but I finally was able to test VT on it. It''s bad news. No VT support. :-( John A. -----Original Message----- From: K. Scott Bethke [mailto:scott@carpathiahost.com] Sent: Monday, March 13, 2006 3:02 PM To: John Anderson Subject: Re: [Xen-users] VT-X on Dell Machines Its like you''re reading my mind.. we use the 1850''s/1855''s and 2850s and will order the dual-cores if it is supporting VT now. Let me know what you find. -Scott Bethke CTO, Carpathia Hosting, Inc "The whole world steps aside for the man who knows where he is going." ... Unknown author On Mar 13, 2006, at 4:58 PM, John Anderson wrote:> I have a dell dual core 1850 here I''m going to be testing this on > later > today. I already know that Pacifica support is NOT available in > the new > SunFire AMD servers from Sun. I''ll know if the Dell will work > later on. > > -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of K. Scott > Bethke > Sent: Monday, March 13, 2006 10:37 AM > To: xen-users@lists.xensource.com > Subject: Re: [Xen-users] VT-X on Dell Machines > > On Mar 13, 2006, at 12:31 PM, Luke wrote: > >> Anyone know if any Dell Desktops support VT-X extensions? I see >> that they (the XPS 600 and 400) can come with 9xx Pentium D chips, >> and the 945P chipsets. But has anyone verified that the BIOS >> updates available include VT-X support? > > > Same question on the Dell server line, do any of them support VT yet? > > _Scott > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hello. The following discussion (below) was found in the list archives. I have an additional question concerning this: Does this mean that VT will never be supported on the current shipping Dell 1850s? Or can it be enabled with (a hopefully soon to come) BIOS update? I have reviewed the <http://wiki.xensource.com/xenwiki/IntelVT> web page in attempt to better understand this but I am still a bit confused by VT. Some what related, in the case of the current available Dell 1850 configurations, is there a significant performance advantage with Xen when considering 2 x 2.8 GHz Xeon dual-core CPUs vs. 2 x 3.8 GHz Xeon single-core CPUs? Thank you, -Adrian To: <xen-users@xxxxxxxxxxxxxxxxxxx> Subject: RE: [Xen-users] VT-X on Dell Machines From: "John Anderson" <johna@xxxxxxxxxx> Date: Mon, 20 Mar 2006 13:49:04 -0700 Well, it took me a while to get power hooked up for the new Dell 1850 dual dual-core EM64T box, but I finally was able to test VT on it. It''s bad news. No VT support. :-( John A. -----Original Message----- From: K. Scott Bethke [mailto:scott@xxxxxxxxxxxxxxxxx] Sent: Monday, March 13, 2006 3:02 PM To: John Anderson Subject: Re: [Xen-users] VT-X on Dell Machines Its like you''re reading my mind.. we use the 1850''s/1855''s and 2850s and will order the dual-cores if it is supporting VT now. Let me know what you find. -Scott Bethke CTO, Carpathia Hosting, Inc "The whole world steps aside for the man who knows where he is going." ... Unknown author On Mar 13, 2006, at 4:58 PM, John Anderson wrote:> I have a dell dual core 1850 here I''m going to be testing this on > later > today. I already know that Pacifica support is NOT available in > the new > SunFire AMD servers from Sun. I''ll know if the Dell will work > later on. > > -----Original Message----- > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of K. Scott > Bethke > Sent: Monday, March 13, 2006 10:37 AM > To: xen-users@xxxxxxxxxxxxxxxxxxx > Subject: Re: [Xen-users] VT-X on Dell Machines > > On Mar 13, 2006, at 12:31 PM, Luke wrote: > >> Anyone know if any Dell Desktops support VT-X extensions? I see >> that they (the XPS 600 and 400) can come with 9xx Pentium D chips, >> and the 945P chipsets. But has anyone verified that the BIOS >> updates available include VT-X support? > > > Same question on the Dell server line, do any of them support VT yet? > > _Scott_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Adrian Wells wrote:> is there a significant performance advantage with Xen when > considering 2 x 2.8 GHz Xeon dual-core CPUs vs. 2 x 3.8 GHz Xeon > single-core CPUs?Depends on what you''re optimizing for. If you need single threaded algorithms evaluated quickly, then you want higher frequency processors. If, instead, you have multiple jobs that can be processed simultaneously and you measure system performance by having them all complete faster (and in parallel), then you''d do better to maximize the number of cores available. However, keep tabs on the pipeline depth of the processor you''re choosing. As an example of the importance of pipeline depth, a 1GHz Pentium III performs more work in unit time than a Pentium 4 at the same frequency. (Assuming all else is equal, which it never is, see the next paragraph.) Also, note the chipset. A chipset with dual memory controllers will have more memory bandwidth than one with a single memory controller (though, typically, memory latency will remain the same). Oh, and if you''re getting into the details, you might want to consider the effect of a larger L2 cache on your work load. Bigger is (virtually) always better. But, bigger costs more. Personally, the things I value when selecting a system are: 0) Amount of memory 1) # of cores 2) # of memory controllers 3) CPU architecture (fewer pipeline stages) That''s about it. Oh, and then I maximize those given my budget. :-) -- Randy _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users