Re: BUG: perf error on syscalls for powerpc64.

On 2015年07月17日 09:51, Sukadev Bhattiprolu wrote:

Zumeng Chen [zumeng.chen@gmail.com] wrote:
| 3. What I have seen in 3.14.x kernel,
| ======================
| And so far, no more difference to 4.x kernel from me about this part if
| I'm right.
|
| *) With 1028ccf5
|
| perf list|grep -i syscall got me nothing.
|
|
| *) Without 1028ccf5
| root@localhost:~# perf list|grep -i syscall
|    syscalls:sys_enter_socket                          [Tracepoint event]
|    syscalls:sys_exit_socket                           [Tracepoint event]
|    syscalls:sys_enter_socketpair                      [Tracepoint event]
|    syscalls:sys_exit_socketpair                       [Tracepoint event]
|    syscalls:sys_enter_bind                            [Tracepoint event]
|    syscalls:sys_exit_bind                             [Tracepoint event]
|    syscalls:sys_enter_listen                          [Tracepoint event]
|    syscalls:sys_exit_listen                           [Tracepoint event]
|    ... ...

Are you seeing this on big-endian or little-endian system?

Big one.

IIRC, I saw the opposite behavior on an LE system a few months ago.
i.e. without 1028ccf5, 'perf listf|grep syscall' failed.

I wonder if this has anything to do with the bug.

Cheers,
Zumeng

Applying 1028ccf5, seemed to fix it.

Sukadev