x86_64 interrupts handled by CPU0 only

Will Dinkel (wdinkel@atipa.com)
07 May 2003 12:02:34 -0500


Are all interrupts supposed to be handled by CPU0 on x86_64, or is
something amiss? I'm getting the following on Mandrake Corporate Server
2.1:

---
[root@lab180 root]# uname -r -v -m -o
2.4.19-31mdksmp #1 SMP Thu Apr 17 09:34:46 EDT 2003 x86_64 GNU/Linux
[root@lab180 root]# cat /proc/interrupts
           CPU0       CPU1
  0:     447602          0    IO-APIC-edge  timer
  1:        424          0    IO-APIC-edge  keyboard
  2:          0          0          XT-PIC  cascade
 12:        851          0    IO-APIC-edge  PS/2 Mouse
 14:      25038          1    IO-APIC-edge  ide0
 15:       4930          1    IO-APIC-edge  ide1
 19:          0          0   IO-APIC-level  usb-ohci, usb-ohci
 24:     105196          0   IO-APIC-level  ioc0, eth0
 25:         46          0   IO-APIC-level  ioc1
NMI:       2235       3808
LOC:     447494     447555
ERR:          0
MIS:          0
---

I see this behavior on systems using either the MSI or Tyan dual-opteron boards. I also see it on RedHat's preview x86_64 distribution (kernel version 2.4.20-9.2).

I'm still trying to get 2.5.69 to boot correctly, so I don't have results there yet. On RedHat it hangs after "Booting the kernel..." (and yes, I have CONFIG_VT, and CONFIG_VT_CONSOLE on). Any ideas?

System info:

---
[root@lab180 root]# cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 5
model name      : AMD Opteron(TM) 64 Processor 242
stepping        : 0
cpu MHz         : 1594.727
cache size      : 1024 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov
pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow
bogomips        : 3178.49
TLB size        : 1088 4K pages
clflush size    : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts ttp

processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 5 model name : AMD Opteron(TM) 64 Processor 242 stepping : 0 cpu MHz : 1594.727 cache size : 1024 KB fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow bogomips : 3185.04 TLB size : 1088 4K pages clflush size : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp

[root@lab180 root]# lspcidrake unknown : Advanced Micro Devices|AMD-8111 PCI unknown : Advanced Micro Devices|AMD-8111 LPC unknown : Advanced Micro Devices|AMD-8111 IDE unknown : Advanced Micro Devices|AMD-8111 ACPI unknown : Advanced Micro Devices|AMD-8131 PCI-X Bridge unknown : Advanced Micro Devices|AMD-8131 PCI-X APIC unknown : Advanced Micro Devices|AMD-8131 PCI-X Bridge unknown : Advanced Micro Devices|AMD-8131 PCI-X APIC unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge unknown : Advanced Micro Devices|K8 NorthBridge usb-ohci : Advanced Micro Devices|AMD-8111 USB usb-ohci : Advanced Micro Devices|AMD-8111 USB unknown : unknown (105a/3373/ffff/ffff) Card:ATI Mach64 Utah: ATI|Rage XL bcm5700 : Broadcom Corporation|BCM5704 CIOB-E 1000BaseTX bcm5700 : Broadcom Corporation|BCM5704 CIOB-E 1000BaseTX mptscsih : Symbios|53c1030 mptscsih : Symbios|53c1030 unknown : Virtual|Hub [] unknown : Virtual|Hub []

---

-- 
Will Dinkel <wdinkel@atipa.com>
Atipa Technologies

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