Re: callgraph of kernel

[Maynard J. <may...@us...>]

On 09/15/2010 8:10 AM, C K Kashyap wrote:
> Hi All,
>
> I was attempting to generate the callgraph of kernel routines but I
What oprofile version are you using and what's your architecture and processor 
type?  Callgraph is not supported on all architectures.  Some examples where it 
*is* supported are: x86, ppc64, and ARM.

-Maynard
> noticed that kernel output for kernel functions are always  limited as
> follows
>
> -------------------------------------------------------------------------------
> 943       0.0555  libc-2.5.so              times
>    943      100.000  libc-2.5.so              times [self]
> -------------------------------------------------------------------------------
> 689       0.0405  vmlinux                  bad_to_user
>    689      100.000  vmlinux                  bad_to_user [self]
> -------------------------------------------------------------------------------
>
>
> The user land functions however show both callers and callees. My
> opcontrol --status is as follows -
> Daemon not running
> Separate options: library kernel
> vmlinux file: /usr/lib/debug/lib/modules/2.6.18-128.el5debug/vmlinux
> Image filter: /home/ckk/work/oprofile/a.out
> Call-graph depth: 100
>
>
>
>
>