only one CPU working

Hi all

 

I have Dual Xeon Server install with FC5,

Fedora Core release 5 (Bordeaux)

 

 and upgrade to latest

 

Linux nayer 2.6.20-1.2316.fc5 #1 SMP Fri Apr 27 19:19:10 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux

 

but when i checking with intrupts i see only one CPU working

what is the cause of this problem.

 

more /proc/interrupts
           CPU0       CPU1       CPU2       CPU3
  0:    9503856          0          0          0   IO-APIC-edge      timer
  1:         62          0          0          0   IO-APIC-edge      i8042
  6:          3          0          0          0   IO-APIC-edge      floppy
  7:          0          0          0          0   IO-APIC-edge      parport0
  8:    9689942          0          0          0   IO-APIC-edge      rtc
  9:          1          0          0          0   IO-APIC-fasteoi   acpi
 12:        112          0          0          0   IO-APIC-edge      i8042
 16:    3128931          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb1, uhci_hcd:usb5, eth0
 18:          0          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
 19:          0          0          0          0   IO-APIC-fasteoi   uhci_hcd:usb2
 23:          0          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb3
 25:     246456          0          0          0   IO-APIC-fasteoi   ioc0
 26:         46          0          0          0   IO-APIC-fasteoi   ioc1
 50:    6879019          0          0          0   IO-APIC-fasteoi   eth1
NMI:          0          0          0          0
LOC:    9502617    9502546    9502474    9502402
ERR:          0
 

 

other than CPU0, rest all 0

 

is this normal ?

 

any suggestions

 

ram