Enabling SSSE3 for Linux-Based Sensors

In order to guarantee the performance of your virtual modular sensors, you must ensure that SSSE3 is enabled for their processors. Refer to the procedure below.

Virtual modular sensors installed on Linux hosts must have SSSE3 enabled for their processors in order to operate correctly.
SSSE3 is typically supported/enabled for most vCPUs, but may not be for certain legacy AMD vCPUs. See below for instructions on enabling SSSE3.

To enable SSSE3 for a virtual machine:

1. Start the virtual shell (virsh)

2. Type the following command to edit the virtual machine's settings:

   edit <virtual_machine_name>

3. Locate the <cpu> section. It should appear similar to the following:

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   <cpu mode='custom' match='exact' check='partial'>
   
       <model fallback='allow'>SandyBridge</model>
   
   ......
   
    </cpu>

4. Add the following line to the <cpu> section:

   <feature policy='require' name='ssse3'/>

   When you are done, the <cpu> section should appear similar to the following:

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   <cpu mode='custom' match='exact' check='partial'>
   
       <model fallback='allow'>SandyBridge</model>
   
       <feature policy='require' name='ssse3'/>
   
   ...........
   
     </cpu>

5. Save changes to the virtual machine and exist virsh.

6. Run the following command:

   virsh define /etc/libvirt/qemu/<virtual_machine_name>.xml

   Each virtual machine has a configuration .xml file. Typically, these files are stored under /etc/libvirt/qemu, but the location may be different for your system.

7. Stop and start the virtual machine in virsh.