diff --git a/roles/infra/README.md b/roles/infra/README.md
index ea18645..7f8215a 100644
--- a/roles/infra/README.md
+++ b/roles/infra/README.md
@@ -21,6 +21,9 @@ Role Variables
 | `os_image_size`                      | `str`  | `20G`              |                     | The size to which one-deploy will **try** to adjust the OS image. |
 | `memory_KiB`                         | `str`  | `2097152`          |                     | Memory amount to be set in XML in Libvirt.                        |
 | `vcpu_static`                        | `str`  | `1`                |                     | VCPU amount to be set in XML in Libvirt.                          |
+| `cputune_shares_base`                | `int`  | `200`              |                     | Base value used to compute PWS (assuming CGv2).                   |
+| `cputune_shares_max`                 | `int`  | `10000`            |                     | PWS value cap (assuming CGv2).                                    |
+| `cputune_shares`                     | `int`  | computed           |                     | The proportional weighted share (PWS) for the domain.             |
 | `vnc_max_port`                       | `str`  | `65535`            |                     | Upper limit for VNC ports to start counting-down from.            |
 | `passthrough_fs`                     | `list` | `[]`               | (check below)       | Shared HV filesystems to attach to the Front-end VMs.             |
 |                                      |        |                    |                     |                                                                   |
diff --git a/roles/infra/defaults/main.yml b/roles/infra/defaults/main.yml
index d6df348..0d7ac64 100644
--- a/roles/infra/defaults/main.yml
+++ b/roles/infra/defaults/main.yml
@@ -8,3 +8,6 @@ vnc_max_port: 65535
 infra_bridge: br0
 infra_bridge_type: bridge
 passthrough_fs: []
+cputune_shares_base: 200 # twice the OpenNebula's default (for CGv2)
+cputune_shares_max: 10000
+cputune_shares: "{{ ((vcpu_static | int) * (cputune_shares_base | int)) | round(0, 'ceil') }}"
diff --git a/roles/infra/templates/frontend.xml.jinja b/roles/infra/templates/frontend.xml.jinja
index 31ac150..82cc9b4 100644
--- a/roles/infra/templates/frontend.xml.jinja
+++ b/roles/infra/templates/frontend.xml.jinja
@@ -5,6 +5,9 @@
   <memory unit='KiB'>{{ memory_KiB }}</memory>
   <vcpu placement='static'>{{ vcpu_static }}</vcpu>
   <cpu mode='host-passthrough' check='none' migratable='on'/>
+  <cputune>
+    <shares>{{ (cputune_shares if (cputune_shares | int) < (cputune_shares_max | int) else cputune_shares_max) | int }}</shares>
+  </cputune>
 
   <resource>
     <partition>/machine</partition>