> Hmm, so we have: > > > Solaris HVM DomU at SNV87 Dom0 (all 64-bit) > > # elasped time 306.42171 > > Hmm, slow. > > > Test has been run on SNV87 HVM DomU at Xen 3.2.1 > CentOS 5.1 Dom0 (all 64-bit) > > # elasped time 40.26895 > > Ok. > > > Workaround was applied to SNV87 HVM DomU at Xen > 3.2.1 CentOS 5.1 Dom0 (all 64-bit) > > # elasped time 35.59440 > > The workaround improves run time, but only by ~ 10%. > > > Test has been run on SNV87 PV DomU at Xen 3.2.1 > CentOS 5.1 Dom0 (all 64-bit) > > # elasped time 10.34040 > > Yep, for a HVM domain the hypervisor must fully > emulate > the MMU using shadow page tables; with a PV domain > this > isn't necessary and is much faster. > > > Test has been run on SNV87 PV DomU at SNV87 Dom0 > (all 64-bit) > > # elasped time 12.51547 > > Hmm, this test was run on OpenSolaris' xVM / Xen > 3.1.2 hypervisor... > > I don't expect that the SNV87 Dom0 kernel vs CentOS > 5.1 Dom0 kernel *********************************************************************** I would say:- SNV87 Dom0 kernel vs 2.6.18.8-xen kernel compiled from source on CentOS 5.1 *********************************************************************** When i load Xen 3.2.1 on xen disabled CentOS 5.1 instance grub entry is:- ****************************************** title Xen-3.2 x86_64 (2.6.18.8-xen) ****************************************** root (hd1,4) kernel /xen-3.2.gz module /vmlinuz-2.6.18.8-xen ro root=/dev/VolGroup01/LogVol00 rhgb quiet module /initrd-2.6.18.8-xen.img *************************************************** and 3.2 xend service is already activated:- ************************************************** # chkconfig --add xend # chkconfig xend on All Xen 3.2.1 binaries are already compiled from source and installed. When i do the same on F8 it will work as well, but Xen 3.2 build would be done by different version of gcc and glibc ( at least i guess so).
> makes a difference, so I think this might be an > indication that Xen 3.2.1 has > improved PV MMU support over Xen 3.1.2... > > And for a Solaris HVM domU, the HVM MMU performance > increase appears > to be even more dramatic between Xen 3.1.2 and Xen > 3.2.1... This message posted from opensolaris.org _______________________________________________ xen-discuss mailing list [email protected]
