Unless someone says differently, I believe that doesn't change the likely fact that the main KVM is different than what you are doing and would perform much better.
Tony On Sun, Aug 17, 2014 at 8:09 PM, JHM <j...@juliohm.com.br> wrote: > Sorry, I'm taking my first steps with qemu here. The man page for kvm tells > me > > The kvm wrapper script is used to provide compatibility with old qemu-kvm > package which has been merged into qemu as of version 1.3. > > ... which is the the same as runnign qemu-system-x86_64 -enable-kvm. > > > -- Julio H. Morimoto > -- j...@juliohm.com.br > > > On Sun, Aug 17, 2014 at 11:51 PM, Tony Su <ton...@su-networking.com> wrote: >> >> Is there some reason why you appear to be running "full virtualization" >> qemu? >> If you don't need special emulation features of regular QEMU, you >> should instead be running the paravirtualized version (KVM) which will >> provide vastly better performance. >> >> I haven't seen that "-enable-kvm" flag before, but it likely won't be >> nearly the same as running KVM itself. >> >> Tony >> >> On Sun, Aug 17, 2014 at 7:34 PM, JHM <j...@juliohm.com.br> wrote: >> > Salutations to all members, first off. This is my first post in the >> > discussion group. >> > >> > I searched for this topic, but not much turned up from the archive here. >> > >> > Searching for "slow" >> > >> > http://lists.nongnu.org/archive/cgi-bin/namazu.cgi?query=slow&submit=Search!&idxname=qemu-discuss&max=100&result=normal&sort=score >> > >> > I would like to ask if anyone else had troubles with the network >> > performance >> > in the guest network. I am running qemu using ubuntu-14.04 as host. The >> > guest is also ubuntu-14.04. In the guest OS, I have a LAMP stack >> > properly >> > configured. Users can reach the apache server inside via a host NATed >> > tap >> > interface. Anything poking the host at port 80 is passed into the >> > private >> > network between the guest/host. This all works well, and seems to be OK. >> > Users can view websites and download files hosted in the guest LAMP. >> > >> > Except, users are getting very limited download speeds. While the host >> > sits >> > on a 100Mbps symmetric up/down link, users are only able to download at >> > 15Kbps or max 30Kbps. I used to have the same setup running natively >> > without >> > QEMU and user download speeds were great. Once I moved the LAMP stack >> > into >> > the virtual machine, this issue came up. The following is the command >> > line >> > used to start up the qemu vm. >> > >> > qemu-system-x86_64 -hda disk1.qcow -m 1G -smp 4 -enable-kvm -netdev >> > tap,id=tap0,ifname=tap0,script=tap-config.sh -device e1000,netdev=tap0 >> > >> > Call me naive here, but is this kind of network performance expected? >> > The >> > guest OS is unusable. >> > >> > -- Julio H. Morimoto >> > -- j...@juliohm.com.br > >
