PowerEdge T610 - Sees Only 16 "CPUs"

Gentlemen,


            My client has three stations "PowerEdge T610" with 2 processors E5630 (in bios) (Windows E5649). My XenServer (Bare Metal Hypervisor) sees only 16 "CPUs". These 2 processors have 4 cores each and 8 threads for each core.

            The problem is that XenServer sees only 16 "CPUs" when he should see 2x4x8 (CPUsxCoresxThreads) 64 "CPUs". Namely, 32 "CPUs" for each processor.

            I've Recently upgraded this bios. What could be wrong? This is a limitation of Linux? What can I do for this my client?


Thanks!