> Am 02.04.2015 um 19:58 schrieb Andrew Daugherity <adaugher...@tamu.edu>: > > On Mar 30, 2015, at 6:52 PM, Andrew Daugherity <adaugher...@tamu.edu> wrote: >> On Mar 28, 2015, at 8:16 AM, Roger Pau Monné <roger....@citrix.com> wrote: >>> I'm Ccing feld because IIRC he found something similar on one of his >>> boxes, that also had VTx but no EPT (just like yours). Would it be >>> possible for you to try the same set of tests on a different hardware? >> >> I think you're on to something. I copied this FreeBSD 10.1 VM to a system >> running the same version of Xen (and same SLES in the Dom0), but with an >> Opteron 2360SE CPU (which has both SVM and NPT), and it is *much* faster >> (and feels more responsive too): >> [snip] >>> Also, if even FreeBSD 10.1 compiled without XENHVM shows this issue it >>> means there's something in the generic code that doesn't work well when >>> running virtualized on this specific hardware, but I'm afraid figuring >>> it out is not trivial. One place to start would be asking on >>> freebsd-hackers and freebsd-virt. >> >> I suppose this performance delta with presence of EPT/NPT vs. lack thereof >> means it's time to take it to those lists? My next step will be to test >> 10.1 under KVM on the Xeon to confirm whether it's a Xen issue or strictly >> EPT. > > It seems I spoke too soon. I booted into the "default" (non-Xen) Linux > kernel on the Xeon E5420 box and launched the same FreeBSD 10.1 VM under KVM, > and performance is much, much better: >
Hi, I have access to Xen at work (and will continue to do so - we intend to use and offer FreeBSD in our „Cloud“-platform (Apache CloudStack). AFAIK, we have no KVM. Just Xen. Unfortunately, I’ve got little time currently, but I will try to get a VM where I can run this during the next week. I will also collect the hardware-details of the host (AFAIK, we’ve got HP DL380G8 servers with lots of RAM and two CPUs). Rainer _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"