IBM System X3850 Disable Processor Power Management

In order to work around the issue processor power management has to be disabled in system UEFI and vSphere Client.
To change power policies using server UEFI settings:

1. Turn on the server.
   Note: If necessary, connect a keyboard, monitor, and mouse to the console breakout cable and connect the console breakout cable to the compute node.
2. When the prompt ‘Press <F1> Setup’ is displayed, press F1 and enter UEFI setup. Follow the instructions on the screen.
3. Select System Settings –> Operating Modes and set it to ‘Custom Mode’ as shown in ‘Custom Mode’ figure, then set UEFI settings as follows:
   

   Choose Operating Mode <Custom> Memory Speed <Max Performance> Memory Power Management <Disabled> Proc Performance States <Disabled> C1 Enhanced Mode <Disabled> QPI Link Frequency <Max Performance> QPI Link Disable <Enable All Links> Turbo Mode <Enable> CPU C-States <Disable> Power/Performance Bias <Platform Controlled> Platform Controlled Type <Maximum Performance> Uncore Frequency Scaling <Disable>

4. Press Escape key 3 times, and Save Settings.
5. Exit Setup and restart the server so that UEFI changes take effect.

Next, change power policies using the vSphere Client:

1. Select the host from the inventory and click the Manage tab and then the Settings tab as shown in ‘Power Management view from the vSphere Web Client’ figure.
   
2. In the left pane under Hardware, select Power Management.
3. Click Edit on the right side of the screen.
4. The Edit Power Policy Settings dialog box appears as shown in ‘Power policy settings’ figure.
   
5. Choose ‘High performance’ and confirm selection by pressing ‘OK’ radio button.