[Qemu-devel] [Bug 1173490] [NEW] virtio net adapter driver with kvm slow on winxp

[shn]

Public bug reported:

# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.1 LTS
Release:        12.04
Codename:       precise

#virsh version 
Compiled against library: libvirt 1.0.4
Using library: libvirt 1.0.4
Using API: QEMU 1.0.4
Running hypervisor: QEMU 1.2.0

windows xp clean install with spice-guest-tools-0.52.exe from
  
http://spice-space.org/download/windows/spice-guest-tools/spice-guest-tools-0.52.exe

it comes very slow , and the Interrupts process got very high cpu usage(above 
60%).
when i switch the net adapter from virtio to default(rtl8139) ,it works well.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1173490

Title:
  virtio net adapter driver with kvm slow on winxp

Status in QEMU:
  New

Bug description:
  # lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 12.04.1 LTS
  Release:        12.04
  Codename:       precise

  #virsh version 
  Compiled against library: libvirt 1.0.4
  Using library: libvirt 1.0.4
  Using API: QEMU 1.0.4
  Running hypervisor: QEMU 1.2.0

  windows xp clean install with spice-guest-tools-0.52.exe from
    
http://spice-space.org/download/windows/spice-guest-tools/spice-guest-tools-0.52.exe

  it comes very slow , and the Interrupts process got very high cpu usage(above 
60%).
  when i switch the net adapter from virtio to default(rtl8139) ,it works well.

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