Re: FTRACE: regression in 31-rc7

[Gregory Haskins <gregory.haskins@gmail.com>]

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Steven Rostedt wrote:
> On Thu, 27 Aug 2009, Gregory Haskins wrote:
> 
>> Hi Steve,
>>
>> Steven Rostedt wrote:
>> instrumented for some reason.
>>> Hmm, so you think something with the modules broke? I can test that out 
>>> here.
>> Thats my (admittedly fairly ignorant) theory based on the limited data
>> samples I have in front of me. :)
>>
>> If I get a chance later, I will try to do something more scientific, or
>> at least a bisect.
> 
> I just did this:

Sorry, was away from the computer for a while...

In light of these reports, I suspect this may either be some kind of
operator error, or a bad build or something.  I will retry -rc7 with a
clean build later and see if it still reproduces.  Until then, apologies
for the noise.

Kind Regards,
-Greg

> 
>  # uname -r
> 2.6.31-rc7
>  # echo :mod:ext3 > set_ftrace_filter
>  # echo function_graph > current_tracer
>  # cat trace
> # tracer: function_graph
> #
> # CPU  DURATION                  FUNCTION CALLS
> # |     |   |                     |   |   |   |
>  1)   6.928 us    |  ext3_permission();
>  1)   1.234 us    |  ext3_permission();
>  ------------------------------------------
>  1)  gdm-bin-3477  =>   pcscd-2951  
>  ------------------------------------------
> 
>  1)   1.306 us    |  ext3_permission();
>  1)   1.314 us    |  ext3_permission();
>  1)   1.244 us    |  ext3_permission();
>  1)   1.364 us    |  ext3_permission();
>  1)   1.251 us    |  ext3_permission();
>  1)   1.473 us    |  ext3_permission();
>  1)   1.306 us    |  ext3_permission();
>  1)   1.401 us    |  ext3_permission();
>  1)   1.243 us    |  ext3_permission();
>  1)   1.301 us    |  ext3_permission();
>  1)   1.439 us    |  ext3_permission();
>  1)   1.239 us    |  ext3_permission();
>  1)   1.331 us    |  ext3_permission();
>  1)   1.423 us    |  ext3_permission();
>  1)   1.243 us    |  ext3_permission();
>  1)   1.321 us    |  ext3_permission();
>  ------------------------------------------
>  1)   pcscd-2951   =>  gdm-bin-3477 
>  ------------------------------------------
> 
>  1)   2.567 us    |  ext3_permission();
>  1)   1.139 us    |  ext3_permission();
>  1)   2.329 us    |  ext3_permission();
>  1)   1.246 us    |  ext3_permission();
>  1)   1.321 us    |  ext3_permission();
>  1)   0.989 us    |  ext3_permission();
>  1)   1.261 us    |  ext3_permission();
>  1)   1.209 us    |  ext3_permission();
>  1)   1.221 us    |  ext3_permission();
>  1)   0.968 us    |  ext3_permission();
>  1)   2.319 us    |  ext3_permission();
>  1)   1.221 us    |  ext3_permission();
>  1)   2.199 us    |  ext3_permission();
>  1)   1.269 us    |  ext3_permission();
>  ------------------------------------------
>  1)  gdm-bin-3477  =>   bash-3198   
>  ------------------------------------------
> 
>  1)   2.852 us    |  ext3_permission();
>  1)               |  ext3_readdir() {
>  1)   1.249 us    |    free_rb_tree_fname();
>  1)               |    ext3_htree_fill_tree() {
>  1)               |      htree_dirblock_to_tree() {
>  1)               |        ext3_bread() {
>  1)               |          ext3_getblk() {
>  1)               |            ext3_get_blocks_handle() {
>  1)   1.046 us    |              ext3_block_to_path();
> 
> 
> This is with the latest Linus git:
> 
> commit 1e23502cc57cef33455ac7cb9111e3c6d991a894
> Merge: e99b1f2... 3161e45...
> Author: Linus Torvalds <torvalds@linux-foundation.org>
> Date:   Wed Aug 26 20:54:48 2009 -0700
> 
> -- Steve
> 



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