The error occurs and is not leaving a coredump file on the diagnostic partition. I already confirmed that the diagnostic partition is configured as noted on
I opened a support ticket with the HP VMware support team using my support contract with HP Part Number UQ629E - < US $ 300 for 1 year
The solution is to upgrade to ESXi 5.0 Update 2 or later (as PCC is disabled by default).
I did a force upgrade using the HP customized ESXi 5.5 ISO mounted via ILO.
Below is the reply from HP VMware support
I checked the logs for the PSOD on PCPU locked up failed to ack TLB
The Failed to ack TLB Invalidate may be caused by either a hardware or a software issue.
Description - Physical CPUs fail when trying to clear memory page tables
Some HP servers experience a situation where the PCC (Processor Clocking Control or Collaborative Power Control) communication between the VMware ESXi kernel (VMkernel) and the server BIOS does not function correctly.
HP ProLiant G5, G6, G7, or Gen8-series server that includes PCC (Processor Clocking Control or Collaborative Power Control)
As a result, one or more PCPUs may remain in SMM (System Management Mode) for many seconds. When the VMkernel notices a PCPU is not available for an extended period of time, a purple diagnostic screen occurs.
This issue has been resolved as of ESXi 5.0 Update 2 as PCC is disabled by default
To work around this issue in versions prior to ESXi 5.0 U2, disable PCC manually.
To disable PCC:
Connect to the ESXi host using the vSphere Client.
Click the Configuration tab.
In the Software menu, click Advanced Settings.
Deselect the vmkernel.boot.usePCC option.
Restart the host for the change to take effect.
Kindly let us know
Harish Kumar G
Technical Solutions Engineer - VMware
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