>> >> On Thursday 08 February 2007 10:08am, Jim Klein wrote: >> >>> Anyone been able to get the PV drivers from Xensource to work on an >>> FC6 created HVM. Performance is rather sluggish, even on 64bit, >>> without these, yet they don''t seem to want to work here. Or, >>> alternatively, is Red Hat working on their own? The HVM IO is really >>> a bit too slow for most production use without them. >>> >> >> >> On Thu, 8 Feb 2007 11:26am, Lamont Peterson wrote: >> >>> I don''t believe that you can do this. >>> >>> But, I''m wondering what OS you''re trying to run on the HVM DomU. >>> If it''s >>> Linux, use a paravirtualized DomU. You''ll get much better >>> performance >>> (especially on things like I/O). >>> >>> HVM adds some emulation overhead and, thus, is slower than PV. >>> HVM is only >>> necessary to run an OS for which no paravirtualized kernel is >>> available. >>> -- >>> Lamont Peterson <lamont@gurulabs.com> >>> Senior Instructor >>> Guru Labs, L.C. [ http://www.GuruLabs.com/ ] >>> >> >> All my Linux guests are PV (been running Xen in production for 7 >> months - far longer >> in testing.) I''m talking about Windows guests, which is why I >> would need PV drivers to work. >> Am running 64bit Dom0 to alleviate some of the pain, but I/O is >> still too slow for anything >> but lightweight applications. We''re a RHEL shop, so would prefer >> to use RHEL as a base over >> XenSource Commercial, but it looks like I may have to go that >> route if noone else is working >> on PV drivers for Windows guests. >> >> > > Interesting point is the fact that Novell will ship Windows PV > drivers in > SLES 10 SP1 when it''s released in May 2007.. > > -- Pasi >If only SLES didn''t suck - and Novell actually kept their promises. But I could be wrong, maybe they''ll be better now that they have reliable partners like Microsoft... -- Jim Klein Director Information Services & Technology LPIC1, CNA/CNE 4-6, RHCT/RHCE Saugus Union School District http://www.saugus.k12.ca.us "Finis Origine Pendet"
On Sat, Feb 10, 2007 at 09:45:07AM -0800, Jim Klein wrote:> >> > >>On Thursday 08 February 2007 10:08am, Jim Klein wrote: > >> > >>>Anyone been able to get the PV drivers from Xensource to work on an > >>>FC6 created HVM. Performance is rather sluggish, even on 64bit, > >>>without these, yet they don''t seem to want to work here. Or, > >>>alternatively, is Red Hat working on their own? The HVM IO is really > >>>a bit too slow for most production use without them. > >>> > >> > >> > >>On Thu, 8 Feb 2007 11:26am, Lamont Peterson wrote: > >> > >>>I don''t believe that you can do this. > >>> > >>>But, I''m wondering what OS you''re trying to run on the HVM DomU. > >>>If it''s > >>>Linux, use a paravirtualized DomU. You''ll get much better > >>>performance > >>>(especially on things like I/O). > >>> > >>>HVM adds some emulation overhead and, thus, is slower than PV. > >>>HVM is only > >>>necessary to run an OS for which no paravirtualized kernel is > >>>available. > >>>-- > >>>Lamont Peterson <lamont@gurulabs.com> > >>>Senior Instructor > >>>Guru Labs, L.C. [ http://www.GuruLabs.com/ ] > >>> > >> > >>All my Linux guests are PV (been running Xen in production for 7 > >>months - far longer > >>in testing.) I''m talking about Windows guests, which is why I > >>would need PV drivers to work. > >>Am running 64bit Dom0 to alleviate some of the pain, but I/O is > >>still too slow for anything > >>but lightweight applications. We''re a RHEL shop, so would prefer > >>to use RHEL as a base over > >>XenSource Commercial, but it looks like I may have to go that > >>route if noone else is working > >>on PV drivers for Windows guests. > >> > >> > > > >Interesting point is the fact that Novell will ship Windows PV > >drivers in > >SLES 10 SP1 when it''s released in May 2007.. > > > >-- Pasi > > > > If only SLES didn''t suck - and Novell actually kept their promises. > But I could be wrong, maybe they''ll be better now that they have > reliable partners like Microsoft... >"Novell and Intel plan to announce Monday software that improves the performance of Windows running atop the Xen virtualization software." http://news.com.com/Novell+offers+faster+virtualized+Windows/2100-1012_3-6158196.html I guess that means PV drivers for windows.. -- Pasi
On Feb 12, 2007, at 9:12 AM, Pasi Kärkkäinen wrote:> On Sat, Feb 10, 2007 at 09:45:07AM -0800, Jim Klein wrote: >>>> >>>> On Thursday 08 February 2007 10:08am, Jim Klein wrote: >>>> >>>>> Anyone been able to get the PV drivers from Xensource to work >>>>> on an >>>>> FC6 created HVM. Performance is rather sluggish, even on 64bit, >>>>> without these, yet they don''t seem to want to work here. Or, >>>>> alternatively, is Red Hat working on their own? The HVM IO is >>>>> really >>>>> a bit too slow for most production use without them. >>>>> >>>> >>>> >>>> On Thu, 8 Feb 2007 11:26am, Lamont Peterson wrote: >>>> >>>>> I don''t believe that you can do this. >>>>> >>>>> But, I''m wondering what OS you''re trying to run on the HVM DomU. >>>>> If it''s >>>>> Linux, use a paravirtualized DomU. You''ll get much better >>>>> performance >>>>> (especially on things like I/O). >>>>> >>>>> HVM adds some emulation overhead and, thus, is slower than PV. >>>>> HVM is only >>>>> necessary to run an OS for which no paravirtualized kernel is >>>>> available. >>>>> -- >>>>> Lamont Peterson <lamont@gurulabs.com> >>>>> Senior Instructor >>>>> Guru Labs, L.C. [ http://www.GuruLabs.com/ ] >>>>> >>>> >>>> All my Linux guests are PV (been running Xen in production for 7 >>>> months - far longer >>>> in testing.) I''m talking about Windows guests, which is why I >>>> would need PV drivers to work. >>>> Am running 64bit Dom0 to alleviate some of the pain, but I/O is >>>> still too slow for anything >>>> but lightweight applications. We''re a RHEL shop, so would prefer >>>> to use RHEL as a base over >>>> XenSource Commercial, but it looks like I may have to go that >>>> route if noone else is working >>>> on PV drivers for Windows guests. >>>> >>>> >>> >>> Interesting point is the fact that Novell will ship Windows PV >>> drivers in >>> SLES 10 SP1 when it''s released in May 2007.. >>> >>> -- Pasi >>> >> >> If only SLES didn''t suck - and Novell actually kept their promises. >> But I could be wrong, maybe they''ll be better now that they have >> reliable partners like Microsoft... >> > > "Novell and Intel plan to announce Monday software that improves the > performance of Windows running atop the Xen virtualization software." > > http://news.com.com/Novell+offers+faster+virtualized+Windows/ > 2100-1012_3-6158196.html > > I guess that means PV drivers for windows.. > > -- PasiImpressive prediction - hopefully, they will open source them so that all may benefit. -- Jim Klein Director Information Services & Technology LPIC1, CNA/CNE 4-6, RHCT/RHCE Saugus Union School District http://www.saugus.k12.ca.us "Finis Origine Pendet"