Re: [PATCH v3 2/2] powerpc: Uprobes port to powerpc

[Srikar Dronamraju <srikar@linux.vnet.ibm.com>]

* Ananth N Mavinakayanahalli <ananth@in.ibm.com> [2012-07-26 10:50:29]:

> From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
> 
> This is the port of uprobes to powerpc. Usage is similar to x86.
> 
> [root@xxxx ~]# ./bin/perf probe -x /lib64/libc.so.6 malloc
> Added new event:
>   probe_libc:malloc    (on 0xb4860)
> 
> You can now use it in all perf tools, such as:
> 
> 	perf record -e probe_libc:malloc -aR sleep 1
> 
> [root@xxxx ~]# ./bin/perf record -e probe_libc:malloc -aR sleep 20
> [ perf record: Woken up 22 times to write data ]
> [ perf record: Captured and wrote 5.843 MB perf.data (~255302 samples) ]
> [root@xxxx ~]# ./bin/perf report --stdio
> ...
> 
> # Samples: 83K of event 'probe_libc:malloc'
> # Event count (approx.): 83484
> #
> # Overhead       Command  Shared Object      Symbol
> # ........  ............  .............  ..........
> #
>     69.05%           tar  libc-2.12.so   [.] malloc
>     28.57%            rm  libc-2.12.so   [.] malloc
>      1.32%  avahi-daemon  libc-2.12.so   [.] malloc
>      0.58%          bash  libc-2.12.so   [.] malloc
>      0.28%          sshd  libc-2.12.so   [.] malloc
>      0.08%    irqbalance  libc-2.12.so   [.] malloc
>      0.05%         bzip2  libc-2.12.so   [.] malloc
>      0.04%         sleep  libc-2.12.so   [.] malloc
>      0.03%    multipathd  libc-2.12.so   [.] malloc
>      0.01%      sendmail  libc-2.12.so   [.] malloc
>      0.01%     automount  libc-2.12.so   [.] malloc
> 
> Patch applies on the current master branch of Linus' tree (bdc0077af).
> The trap_nr addition patch is a prereq.
> 
> Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>

Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>