Proliant processors

[Salami]

Hi all,

I would like to clarify something. We got a Proliant DL380 g4 which runs RHEL 64bits with a processor Intel(R) Xeon(TM) CPU 3.40GHz
A cat /proc/cpuinfo gives:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.40GHz
physical id : 0
siblings : 2
runqueue : 0
stepping : 3
cpu MHz : 3400.272
cache size : 2048 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm ferr syscall lm sse3 monit or ds-cpl gv3 cnxt-id
bogomips : 6789.52
clflush size : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.40GHz
physical id : 3
siblings : 2
runqueue : 1
stepping : 3
cpu MHz : 3400.272
cache size : 2048 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm ferr syscall lm sse3 monit or ds-cpl gv3 cnxt-id
bogomips : 6789.52
clflush size : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.40GHz
physical id : 0
siblings : 2
runqueue : 0
stepping : 3
cpu MHz : 3400.272
cache size : 2048 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm ferr syscall lm sse3 monit or ds-cpl gv3 cnxt-id
bogomips : 6789.52
clflush size : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.40GHz
physical id : 3
siblings : 2
runqueue : 1
stepping : 3
cpu MHz : 3400.272
cache size : 2048 KB
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm ferr syscall lm sse3 monit or ds-cpl gv3 cnxt-id
bogomips : 6789.52
clflush size : 64
address sizes : 36 bits physical, 48 bits virtual
power management:


So it looks according to address sizes : 36 bits physical, 48 bits virtual that the proc is 32 bits. How come to we run 64 bits system on a 32 bits proc?

Thanks for you eexplanations.

[Marek Nelec · Accepted solution]

Hi
They are not truly 64-bit processors. They use Intel EM64T extensions (now called Intel 64 Architecture). More info here:
http://www.intel.com/technology/intel64/index.htm

[Salami]

Ok but can i retrieve with a tool or somewhere the capability of the processor?

[Rich Amick]

The capability of the processor is in the lm flag - lm stands for large memory (64-bit memory addressability.

[Rich Amick]

The capability of the processor is in the lm flag - lm stands for large memory (64-bit memory addressability).