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ESXi 5.1U1 reporting power management as unknown after changing the BIOS setting to high performance mode

Posted on 2015-01-28
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Last Modified: 2015-01-28
Folks,

I'm running VMware ESXi 5.1 U1 on my HP Blade server BL 465cG7 and G8 in my enclosures and I'm confused and need some clarification as to why my ESXi power management profile has become unknown nad not supported as below:

After the changeThat was after the I've changed the Power management setting from the BIOS into “High Performance” mode followed by the server reboot

Before the changeThe above screenshot was taken before the BIOS power management profile changed.

Can anybody please clarify me ?

Thanks
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9 Comments
 
LVL 123
ID: 40575322
Were you using the HP OEM version of ESXi 5.1 ?
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Accepted Solution

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gheist earned 2000 total points
ID: 40576116
Yes, permanent high perfromance means vmware has no control over CPU. It is highly recommended by HP.

If you mention CPU model I might read performance best practices in front of you. Basically you need to allow to park cores to get turbo speed on remaining cores, and enable socket C6 to shut down unused extra CPUs.
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LVL 8

Author Comment

by:Senior IT System Engineer
ID: 40576137
Yes I'm using the HP VMware ESXi ISO for all the Blades.

The CPU model is AMD 6100 and 6300 series.
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Assisted Solution

by:gheist
gheist earned 2000 total points
ID: 40576382
Yes, they have turbo boost. Try to find C1 / c2 options to enable turbo boost
http://www.vmware.com/pdf/Perf_Best_Practices_vSphere5.1.pdf see page 16 and configure BIOS accordingly.
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LVL 8

Author Comment

by:Senior IT System Engineer
ID: 40576395
Ah I see so in the case below

HP iLO console (BIOS setting) set to HP Dynamic Power Savings Mode the ESXi hypervisor can control the power management hence it can show the power management setting as per below screenshot:

ESXI power
but when it is set to HP Static High Performance Mode the ESXi hypervisor cannot control it anymore hence showing the Properties as disabled:
Disabled
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LVL 62

Expert Comment

by:gheist
ID: 40576409
Yes, that is how it works.
Is there some problem with implementing vmware's best practices?
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LVL 8

Author Comment

by:Senior IT System Engineer
ID: 40576426
Well, the reason I'm implementing the HP static high performance from the previous dynamic power saving mode was because I've been told by the system integrator consultant to resolve the problem of TCP dropped packet and TCP packet retransmission which is occurring intermittently in high volume.
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LVL 62

Expert Comment

by:gheist
ID: 40576453
Your diagnostics are WRONG. How CPU speed can fix a software bug?
Please patch to 5.1U3 as 5.1U2 fixes the issue you have, and U3 fixes some more you dont want to revisit.
You have two eyes to read release notes.
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LVL 8

Author Comment

by:Senior IT System Engineer
ID: 40576473
yes, that does make sense.
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