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PaulLab3
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24vCPU on SLES 11 SP3 VM - slow performance, high %LAT_C

Hello!

I have HP Blade with 2 x 12 core Intel e5-2695v2 @ 2,4GHz and 512GB RAM. (vsphere 5.5 U3)

On this host I have SLES 11 SP3 based VM with 24 vCPU (24 x 1 core configuration) and 256GB vRAM.

When vCPUs going on 100% while stress, pCPU using only 1,6GHz.

ESXTOP CPU shows %USED 1700% and %LAT_C 700%.

ESXTOP MEM shows that this VM working on one NUMA node.

SLES numactl shows one numa.

There is no other VMs on this host.

IMO it looks like 2vCPU working on 1pCPU.

Please tell me why ?

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PaulLab3
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Only thing I can do was set vCPU config as 2 socket x 12 cores.

Now all CPUs working at 2,4GHz.

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PaulLab3
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Only thing I can do was set vCPU config as 2 socket x 12 cores.

Now all CPUs working at 2,4GHz.

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