On Sat, 9 Apr 2011 13:34:43 +0300 Blue Swirl <blauwirbel@xxxxxxxxx> wrote: > On Sat, Apr 9, 2011 at 2:25 AM, Luiz Capitulino <lcapitulino@xxxxxxxxxx> wrote: > > Hi there, > > > > Summary: > > > > - PXE boot in qemu.git (HEAD f124a41) is quite slow, more than 5 minutes. Got > > the problem with e1000, virtio and rtl8139. However, pcnet *works* (it's > > as fast as qemu-kvm.git) > > > > - PXE boot in qemu-kvm.git (HEAD df85c051) is fast, less than a minute. Tried > > with e1000, virtio and rtl8139 (I don't remember if I tried with pcnet) > > > > I tried with qemu.git v0.13.0 in order to check if this was a regression, but > > I got the same problem... > > > > Then I inspected qemu-kvm.git under the assumption that it could have a fix > > that wasn't commited to qemu.git. Found this: > > > > - commit 0836b77f0f65d56d08bdeffbac25cd6d78267dc9 which is merge, works > > > > - commit cc015e9a5dde2f03f123357fa060acbdfcd570a4 does not work (it's slow) > > > > I tried a bisect, but it brakes due to gcc4 vs. gcc3 changes. Then I inspected > > commits manually, and found out that commit 64d7e9a4 doesn't work, which makes > > me think that the fix could be in the conflict resolution of 0836b77f, which > > makes me remember that I'm late for diner, so my conclusions at this point are > > not reliable :) > > > > Ideas? > > What is the test case? It's an external PXE server, command-line is: qemu -boot n -enable-kvm -net nic,model=virtio -net tap,ifname=vnet0,script= > I tried PXE booting a 10M file with and without > KVM and the results are pretty much the same with pcnet and e1000. > time qemu -monitor stdio -boot n -net nic,model=e1000 -net > user,tftp=.,bootfile=10M -net dump,file=foo -enable-kvm > time qemu -monitor stdio -boot n -net nic,model=pcnet -net > user,tftp=.,bootfile=10M -net dump,file=foo -enable-kvm > time qemu -monitor stdio -boot n -net nic,model=e1000 -net > user,tftp=.,bootfile=10M -net dump,file=foo > time qemu -monitor stdio -boot n -net nic,model=pcnet -net > user,tftp=.,bootfile=10M -net dump,file=foo > > All times are ~10s. Yeah, you're using the internal tftp server. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
