[sheepdog] [PATCH 00/10] refine tracer

[Liu Yuan]

On Thu, Aug 08, 2013 at 12:48:58AM +0900, MORITA Kazutaka wrote:
> From: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
> 
> The current tracer has the following problems:
> 
>  - We cannot use the tracer with debug build.
>  - GDB doesn't print a line number if we link tracer.ld.
>  - We cannot trace the function which were not called before starting
>    tracer.
>  - There are some race conditions.
> 
> This series fixes these problem.
> 
> This series is a bit big, but helps us lot to debug codes and find a
> bottleneck.  In addition, it doesn't hurt the sheep core codes at all.
> I'd like to include this series in the 0.7.0 release if possible.

I think we need refine the 'collie debug' too:

1 simplify it as 'collie trace [command]'
2 support
  - collie trace enable <thread_checker|loop_checker|graph|all>
  - collie trace disable <thread_checker|loop_checker|graph|all>
  - collie trace status # list current enabled tracer for now
  - collie trace cat # output of tracers if any

When we optimize and stablize the tracer as good enough, then we can enable
some tracers by default.

Thanks
Yuan