Re: about Linux Module Profiling Tool

[Randy.Dunlap]

On Thu, 7 Oct 2004 06:23:43 -0700 (PDT) anil dahiya wrote:

| anil kumar : 
|  > If anyone have idea about linux module profiling
|  > tools>> >  
| 
| Neil :
|   > What kind of profiling do you want to do?
|   
| 
| Anil Kumar :
| 
| after booting system, I am loading my network device
| driver module in linux kernel .
| 
| I wanna to know how much time is taking by functions
| of my module at any time (i.e just after loading
| module or just after sending or receiving data etc).
| So I  can improve performance of my module by
| improving those function which taking maximum time or 
| cpu utilization.


Check out oprofile:
in kernel tree, Documentation/basic_profiling.txt (2.6.x)

Basic in-kernel profiling (older version, before oprofile)
does not work with loadable modules, just with in-kernel code.
You could use this if you build your driver in-kernel.

There are also some performance-counter patches, but
I don't know how to use them [if your h/w supports them].

-- 
~Randy
MOTD:  Always include version info.
(Again.  Sometimes I think ln -s /usr/src/linux/.config .signature)
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