Help to get opannotate working with jdb

HI there,

 

I run into a problem where I think jdb module is not working correctly with

opannotate. Here is my script to genereate the report files:

 

ln -s /lib/modules/`uname -r`/kernel ko.l

opreport -l -p ko.l/. > opreport.log

opreport -l > opreport-summary.log

opannotate --source -d /usr/src/linux -p ko.l/. > opannotate.log

 

where in opreport.log, I saw a jdb function journal_dirty_data which

uses 0.18% CPU, but in opannotate.log, function “journal_dirty_data”

is not listed at all. When I run the above script, I did get the following

warnings:

 

warning: could not check that the binary file /lib/modules/2.6.9-34.ELsmp/kernel/fs/jbd/jbd.ko has not been modified since the profile was taken. Results may be inaccurate.

warning: /jbd could not be found.

 

I am not sure if that will explain what I missed here. BTW, I started oprofile as following:

 

opcontrol --reset

opcontrol --start --vmlinux=/usr/src/linux/vmlinux

 

I am trying to understand the breakdown of time consumptions within a function. If there is

other ways than opannotate to achieve this, Please let me know. I really appreciate your

help.

 

Thanks,

--

John Liang

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