2x Xeon E5620 . 16 Cores altogether. /proc/cpuinfo shows cache is only @ 4096kb
According to intel this should have 12MB of "smart cache". Doing searched for E5620 and CPUinfo shows the correct number:
cache size : 12288 KB
However mine shows this:
processor : 15
v endor_id : GenuineIntel
cpu family : 6
model : 44
model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz
stepping : 2
microcode : 0x1
cpu MHz : 2400.104
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 11
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx
bogomips : 4800.20
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
this is under a KVM kernel as a baremetal guest.
lscpu shows this:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 16
On-line CPU(s) list: 0-15
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 16
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 44
Stepping: 2
CPU MHz: 2400.104
BogoMIPS: 4800.20
Hypervisor vendor: KVM
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 4096K
NUMA node0 CPU(s): 0-15
KVM seems to be stealing some cpu cache. why is this?
.