vCMP host physical memory is 0

I don't have any vCMP unit to test this, but maybe tmm is not running in the host when you are running vCMP.

This command will give you the tmm total memory:

tmsh show sys tmm-info global

This one will give you the linux system and each tmm.

tmsh show sys memory

Also, read these solutions, because in thread mode is different how you see the memory.

https://support.f5.com/kb/en-us/solutions/public/14000/300/sol14358.html

https://support.f5.com/kb/en-us/solutions/public/15000/000/sol15003.html