Re: [Qemu-discuss] [Qemu-devel] [dpdk-dev] Will huge page have negative effect on guest vm in qemu enviroment?

2017-06-21 Thread Dr. David Alan Gilbert
plan to use DPDK on HP host machine with several core and big memory. > > >> We plan to use qemu-kvm enviroment. The host will carry 4 or more guest > > vm > > >> and 1 ovs. > > >> > > >> Ovs-dpdk is much faster then normal ovs, but to use ovs-dpdk, we have to > > >> enable huge page globally. > > >> > > >> My question is, will huge page enabled globally have negative effect on > > >> guest vm's memory orperate or something? If it is, how to prevent this, > > or > > >> could I enable huge page on some core or enable huge page for a part of > > >> memory? > > >> > > >> Thank you~ > > >> > > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK

Re: [Qemu-discuss] [edk2] How to handle pflash backed OVMF FW upgrade and live migration best?

2018-03-02 Thread Dr. David Alan Gilbert
r the FD_SIZE_2MB binary (and vice versa). I assume that gives a clear and obvious error message - right? Dave > Thanks > Laszlo > > > If I'm missing something and there's already an easy way for this I'd be > > very happy to hear from it. > > > > Besides qemu-discuss I posted it to edk2-devel as there maybe more people > > are in the QEMU and OVMF user intersection. :) -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK

Re: [Qemu-discuss] [Qemu-devel] virtio-console downgrade the virtio-pci-blk performance

2018-10-01 Thread Dr. David Alan Gilbert
the test back to a simple file? Dave > > Thanks in advance. > -- > Thanks and Best Regards, > Alex > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK

Re: [Qemu-discuss] [Qemu-devel] Cross-posted : Odd QXL/KVM performance issue with a Windows 7 Guest

2019-09-06 Thread Dr. David Alan Gilbert
run CAD on a Windows 7 VM on a Ryzen machine. > > I've tried it on two machines (a 1500x and an 1800x) with the same result. > The same configuration on the i7 box works perfectly. > > I've tried several versions of SPICE, multiple versions of KVM, kernels back >

Re: [Qemu-discuss] [Qemu-devel] Cross-posted : Odd QXL/KVM performance issue with a Windows 7 Guest

2019-09-09 Thread Dr. David Alan Gilbert
* Brad Campbell (lists2...@fnarfbargle.com) wrote: > > On 7/9/19 03:03, Dr. David Alan Gilbert wrote: > > * Brad Campbell (lists2...@fnarfbargle.com) wrote: > > > On 2/9/19 6:23 pm, Brad Campbell wrote: > > > > > > > Here is the holdup

Re: Live migration fails with "Mismatched RAM page size ram-node0 (local) 2097152 != 1526773257204281392"

2021-02-02 Thread Dr. David Alan Gilbert
A3030 which is 21 bytes long and is: :00 which looks like the start of a PCI address; maybe for video RAM. Or in a simple answer; if you've got postcopy enabled, and you're using hugepages, make sure you use them consistently on source and destination. Dave > -- > Thanks, > Damir Chanyshev > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK

Re: romfile resize

2021-02-23 Thread Dr. David Alan Gilbert
r boundary so that you leave room for growth. Some distros have done that for a while. Dave > > thank you. > > > > -- > > > > Best Regards, > > > > Jiatong Shen > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK

Re: romfile resize

2021-02-23 Thread Dr. David Alan Gilbert
gt; Jiatong Shen > > On Tue, Feb 23, 2021 at 5:46 PM Dr. David Alan Gilbert > wrote: > > > * Philippe Mathieu-Daudé (phi...@redhat.com) wrote: > > > Cc'ing qemu-devel@ > > > > > > On 2/23/21 1:45 AM, Jiatong Shen wrote: > > >