Re: setup problems

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

Jerome wrote:
> On Thu, 19 May 2005, Philippe Elie wrote:
> 
> 
>>On Thu, 19 May 2005 at 13:27 +0000, Jerome wrote:
>>
>>
>>>Hi,
>>>In trying to set up Oprofile, I get the following error:
>>>
>>>[root@la-opt1 oprofile-0.8.2]# opcontrol --vmlinux=/boot/vmlinux-`uname -r`
>>>FATAL: Module oprofile not found.
>>>FATAL: Module oprofile not found.
>>>Kernel doesn't support oprofile
>>>[root@la-opt1 oprofile-0.8.2]#
>>>
>>>Is there something I may have done wrong in the installation? When
>>>configuring and installing Oprofile, I didn't get any errors. My system is
>>>as follows:
>>>
>>>[root@la-opt1 oprofile-0.8.2]# uname -a
>>>Linux la-opt1 2.6.11.7 #1 SMP Wed Apr 20 15:18:49 PDT 2005 x86_64 x86_64
>>>x86_64 GNU/Linux
>>>[root@la-opt1 oprofile-0.8.2]#
>>>
>>>And I had CONFIG_X86_IO_APIC=y in my kernel configuration file (that
>>>was used to compile my current kernel).
>>>
>>>Why would I be getting "Kernel doesn't support oprofile" error? Is there a
>>>an Oprofile module I need to explicity load? Thanks
>>
>>The module should be loaded automatically, for 2.6 kernel (is it a 2.6 ?)
>>you need to enable CONFIG_PROFILING=y and CONFIG_OPROFILE=m when building
>>your kernel.
>>
>>Some recent kernel disable io-apic at runtime, you need perhaps to
>>explicitely enable it at boot with lapic kernel parameter if I remember
>>correctly.
>>
> 
> 
> Thanks Philippe. I am using a 2.6 kernel, but didn't realise I had to
> check CONFIG_PROFILING and CONFIG_OPROFILE. Does it matter whether or not
> CONFIG_OPROFILE is in the kernel (=y) or is a module (=m, as you specified
> above)?
> 
> jerome

Select module (=m). The opcontrol script doesn't deal well with oprofile 
compiled into the kernel.

-will