How to list all virtual machines created using qemu-system-x86_64?

I am using qemu-system-x86_64 to boot virtual machines on kvm running on Ubuntu 12.04 64-bit desktop. I have a few VM's that are currently running. I want to get the list of all VM's booted using qemu-system-x86_64 on this host machine, how do I get this list?

Specifications:

• qemu-system-x86_64 version 1.0

• linux 3.2.0-60-generic

P.S.: Just as a side note, I am aware of virsh -c qemu:///system list which would list all VMs booted using virsh. However, this does not seem to give the list of VMs booted using qemu-system-x86_64, it would be great if virsh command could list the VMs booted using qemu-system-x86_64.

Each VM started with qemu-system-x86_64 corresponds to a process on the host machine. This means that a list of qemu-system-x86_64 processes corresponds to the list of VMs that are currently running on the host.

ps -ef | grep qemu-system-x86_64

This will list all the qemu-system-x86_64 processes, their pids and the parameters used to start the VM.

Here is a solution for some more advanced nice view (see source below):

This one shows all wemu-systems, not only the x86_64 ones.

Cutton Eye@QEMU:~$ ps -ef | awk -e '/qemu/ && !/awk/' | sed -e 's/[^/]*//' -e 's/ -/\n\t-/g'

/18   00:00:17 qemu-system-x86_64
  -enable-kvm
  -hda MyDrive.img
  -m 1G
  -…

Sean Swehla has created this awesome regex