Editing Test Day:2010-04-08 Virtualization VirtioSerial

= VirtioSerial Testing= 
<pre>
Test matrix:
Guest (i386 & x86_64): 
Linux – RHEL6
Windows 


virtio console ( virtio serial, vmchannel... ) 
  a simple device for data input and out 

Virtio architecture [1]: 

front end : 
  linux   : kernel >=  2.6.32-13.el6 
  windows : need driver 
backend  :
  qemu-kvm >= 0.12.1.2-2.12.el6 
Virtio-serial is just the transport protocol that will enable such applications to be written.It has two parts: 
  (a) device emulation in qemu that presents a virtio-pci device to the guest and 
  (b) a guest driver that presents a char device interface to userspace applications. 

How it work : 
  guest : 
     install front end driver 
  qemu cli : 
     -device virtio-serial-pci,id=virtio-serial0,max_ports=16,vectors=4,bus=pci.0,addr=0x4    
             ^driver                             ~~~~~~~~~~~~~~~~~~~~~~ 
                                                 device option 
     -chardev pty,id=channel0                                                                 
              
     -device virtserialport,chardev=channel0,name=org.linux-kvm.port.0,bus=virtio-serial0.0   
             ^driver                                                   ^ride on bus 

  check device information from QEMU command line : 
     (QEMU) info qtree 
     (QEMU) info pci 
  check device information from guest : 
     #lspci 
     #/sys/class/virtio-ports/*/name 
  
To Be Test : 
Basic functional testing [3] 
 - Amit's test suite from http://fedorapeople.org/gitweb?p=amitshah/public_git/test-virtserial.git 
 - Spawn a virtioconsole, Work on the console 
 - Spawn multiple virtioconsoles 
 - Transfer files from the host to the guest (and vice-versa) over virtio-serial ports 
 - Try all of the above at the same time 
 - Try the above with different guest smp options 
 - Hot-plug / Hot-unplug 
Using the qemu monitor, ports can be hot-plugged as well as unplugged: 
(qemu) device_add virtserialport,name=port.0,id=port0 
(qemu) device_del port0 

Survive basic guest operation 
 - live migration 
 - offline migration 
 - guest reboot/shutdown/kdump 
 - guest s3/s4  
Dynamic add/remove 
 - remove/load guest driver 
 - add/remove device from qemu command 
     device add  and survive reboot 
     device delete and survive reboot 
     create MAX number of ports ( default max=31) 
     add existed device 
     remove unexisted device 
Performance 
  - X MB/s 

TBD : 
test window front driver with spice.
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