Re: Error message "cpu_type '(null)' is not valid" with APIC enabled

[William C. <wc...@nc...>]

Richard Hansen wrote:
> William Cohen wrote:
> 
>> I have certainly had oprofile using the Pentium M hardware counters on 
>> a 2.6 kernel. The machine is a IBM ThinkPad T41. Which kernel source 
>> are you using?
> 
> 
> I'm using Fedora's 2.6.8-1.521 kernel source plus .config with some 
> changes (added driver for my web camera, comment out the Latitude 
> blacklisting in arch/i386/kernel/dmi_scan.c, and config changes to turn 
> on APIC, OProfile, and the webcam driver).
> 
>> After doing a "opcontrol --init" what do you get for "cat 
>> /dev/oprofile/cpu_type"? In theory this should give "i386/p6_mobile".
> 
> 
> It does indeed say "i386/p6_mobile".  How interesting.  I didn't think 
> the module was loading (I thought the error was fatal).  Maybe it's the 
> daemon that's spitting out the errors.  I just tried opcontrol 
> --start-daemon and it doesn't seem to fire up the daemon.
> 
> I'm wondering:  Looks like the userland stuff is somewhat old (CVS 
> version around January 2004, not the official release from May 2004).  
> Maybe the errors are due to bugs in the userland stuff that have since 
> been fixed?  I wonder why the Fedora crew hasn't updated the RPM...  Is 
> there a newer RPM available somewhere?

I haven't run the fc2 version of oprofile on the p6 machine I have. it 
is mainly a RHEL3 machine with some 2.6 kernel. Which oprofile rpm are 
you using? oprofile-0.8-0.20040121.4?  There is a newer version in FC3, 
oprofile-0.8-20040511.12.src.rpm. You might try to build and use that 
one. If the problem is still there file a bug report on bugzilla.redhat.com.

-Will