Perf output strange memory addresses

Question

I was using perf on a profiling work. But I got some problems:

1. a lot of weird output memory addresses
2. there is some addresses from user not translate to symbols

I compiled the problem with -fno-omit-frame-pointer ... and -g , but still got this problem.

Can anyone help to have a look? How to fix these two problems?

The perf output is:

 9.28%  gserver  gserver     [.] 0x000000000013bb20

 2.36%  gserver  libpthread-2.19.so  [.] pthread_mutex_lock
        |
        --- pthread_mutex_lock
           |
           |--28.31%-- 0x0
           |          |
           |          |--38.16%-- 0x3
           |          |
           |          |--37.72%-- 0x0
           |          |          |
           |          |          |--90.05%-- 0x25
           |          |          |          |
           |          |          |          |--53.41%-- 0x100000001
           |          |          |          |          std::_Sp_counted_ptr<Buffer*, (__gnu_cxx::_Lock_policy)2>::~_Sp_counted_ptr()
           |          |          |          |          0x1f0fc35de58948

Answer 1

It doesn't matter, because those are in library code, which you didn't build, and you can't fix.

You can see it's spending 2.63% of its time in a mutex_lock, meaning it's waiting for something.
That's insignificant.

I assume you're looking for significant stuff. I use this technique .