Re: [microblaze-uclinux] kernel profiling

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Jim,

Jim Van Vorst wrote:
> Has anyone gotten kernel profiling running with 2.6?  It looks like 
> oprofile is available in uclinux but for !microblaze.  I tried 
> readprofile but got something useless.  I could compile with -pg but 
> then I'd have to write the enter/exit support.  But I figure someone has 
> already done this.

In the 2.4 kernel, the older style kernel profiling and readprofile work 
fine.

I haven't tried them in 2.6, and to be honest am not sure how they 
interplay with oprofile, which profiles libs and apps as well as the kernel.

oprofile on no-mmu is a bit of a pain, the kernel hooks are straight 
forward but there's a bunch of userspace utils for reading the profile 
buffers, and displaying/interpreting the info, that have to be hacked on 
to work without an MMU.

I'll have a bit of a dig and see what I can find.  Regular readprofile 
shouldn't be too hard to get going, oprofile is a bit more involved.

Regards,

John
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