Bug 215729

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Description of problem:
On my system, any operation from opcontrol fails with "cpu_type 'unset' is not valid"

For example, running "opcontrol --init" as root just gives :
cpu_type 'unset' is not valid

I can check that the oprofile module is loaded :
$ /sbin/lsmod |grep oprofile
oprofile              144689  1

Those 2 lines appear in dmesg :
oprofile: using NMI interrupt.
SELinux: initialized (dev oprofilefs, type oprofilefs), uses genfs_contexts

The /dev/oprofile directory is populated :
$ ls -l /dev/oprofile/
total 0
drwxr-xr-x 1 root root 0 nov 15 14:52 0
drwxr-xr-x 1 root root 0 nov 15 14:52 1
-rw-r--r-- 1 root root 0 nov 15 14:52 backtrace_depth
-rw-r--r-- 1 root root 0 nov 15 14:52 buffer
-rw-r--r-- 1 root root 0 nov 15 14:52 buffer_size
-rw-r--r-- 1 root root 0 nov 15 14:52 buffer_watershed
-rw-r--r-- 1 root root 0 nov 15 14:52 cpu_buffer_size
-rw-r--r-- 1 root root 0 nov 15 14:52 cpu_type
-rw-rw-rw- 1 root root 0 nov 15 14:52 dump
-rw-r--r-- 1 root root 0 nov 15 14:52 enable
-rw-r--r-- 1 root root 0 nov 15 14:52 pointer_size
drwxr-xr-x 1 root root 0 nov 15 14:52 stats

But at least the content of /dev/oprofile/cpu_type is problematic : it's empty.

You can find the content of /proc/cpuinfo below.

Version-Release number of selected component (if applicable):
oprofile-0.9.1-8.1.1, kernel-2.6.18-1.2239.fc5

How reproducible:
Always


Steps to Reproduce:
1. opcontrol --init
2.
3.

Actual Results:
cpu_type 'unset' is not valid

The /dev/oprofile directory is populated but /dev/oprofile/cpu_type is an empty file

Expected Results:
/dev/oprofile/cpu_type should contain "i386/core2" or something like that

Additional info:
This is an double - double core from intel (so there's a total of 4 cores)

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            5150  @ 2.66GHz
stepping        : 6
cpu MHz         : 1998.000
cache size      : 4096 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5322.22
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            5150  @ 2.66GHz
stepping        : 6
cpu MHz         : 1998.000
cache size      : 4096 KB
physical id     : 3
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5319.28
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 2
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            5150  @ 2.66GHz
stepping        : 6
cpu MHz         : 1998.000
cache size      : 4096 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5319.33
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            5150  @ 2.66GHz
stepping        : 6
cpu MHz         : 1998.000
cache size      : 4096 KB
physical id     : 3
siblings        : 2
core id         : 1
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
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 syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5319.26
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management: