[Questions] How to run 'perf top' on ARM to profile kernel functions with modules loaded

[Kyungmin Park]

On Thu, Nov 11, 2010 at 4:52 PM, Ming Lei <tom.leiming at gmail.com> wrote:
> 2010/11/11 Ming Lei <tom.leiming at gmail.com>:
>> Hi,
>>
>> 'perf top' can't display any functions when modules are loaded on ARM.
>
> Sorry, should be can't display any kernel functions when modules are loaded
> on ARM.
>
> Also, when modules are loaded, 'perf report' can't display functions names,
> follows result of 'perf report':
>

Hi,

I tried to build the perf as static and build success on ARM. But
there's no display and no top results also.
How do you build the perf on ARM? any hints or clues?

Thank you,
Kyungmin Park
> root at beagleboard:~# perf report
> # Events: 4K cycles
> #
> # Overhead      Command      Shared Object                  Symbol
> # ........  ...........  .................  ......................
> #
>    97.36%      swapper  [musb_hdrc]        [k]  10466c4
>     2.19%         perf  [musb_hdrc]        [k]  10da070
>     0.09%  ksoftirqd/0  [musb_hdrc]        [k]  10db998
>     0.06%         perf  libc-2.9.so        [.] memchr
>     0.04%         perf  libc-2.9.so        [.]    663c0
>     0.02%         perf  perf               [.]     2e80
>     0.02%         perf  libc-2.9.so        [.] closedir
>     0.02%         perf  libc-2.9.so        [.] __read
>     0.02%  flush-179:0  [musb_hdrc]        [k]  10ff124
>     0.02%         perf  libc-2.9.so        [.] memset
>     0.02%         perf  libc-2.9.so        [.] __memcpy_chk
>     0.02%         perf  perf               [.] event__synthesize_comm
>     0.02%         perf           ffff0fc4  [.] ffff0fc4
>     0.02%         perf  perf               [.] hex2u64
>     0.02%         perf  libc-2.9.so        [.] _IO_vfprintf
>     0.02%         perf  libc-2.9.so        [.] fgets
>     0.02%         perf  libpthread-2.9.so  [.] flockfile
>     0.02%         perf  perf               [.] kallsyms__parse
>     0.02%         perf  libc-2.9.so        [.] _IO_getline_info
>
> Any suggestions or comments?
>
> thanks,
> --
> Lei Ming
>
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