confusion in processor settings

[Maher Khalil]

Hello
I have confusion in processor settings
my actual server have 1 socket with 16 cores
in VM can I put sockets to 2 which is higher that the actual server sockets
so can do like this in VM
sockets = 2
cores = 2
so vCPU = 4
CPU LIMIT = 0.4
CPU UNITS = 1024
OR WILL BE PROBLEM LIKE LOADS OR ANYTHING ELSE?

 

[dcsapak]

you can do it, but why would you want to? it depends very much on the guest and workload if this has an impact on performance.
recommended is to use the same layout the host hast. 1 host socket -> 1 socket for the vm

CPU LIMIT = 0.4

this means that you limit the total cpu consumption of the vm to 40% of one core, is that really what you want?

 

[Maher Khalil]

0.4 of host core or guest core

 

[dcsapak]

0.4 of host core or guest core

what do you mean ?

if you set 'cpulimit' of a vm to 0.4, that vm can only ever use 40% of a single core in total (not per core)

 

[Maher Khalil]

Thank you got it