Samples: 18M of event 'cycles', 4000 Hz, Event count (approx.): 43742721967 lost: 0/0 drop: 0/5
Overhead  Shared Object       Symbol
  29.35%  mysqld              [.] ut_delay
   5.14%  mysqld              [.] ut_crc32_hw
   2.76%  [kernel]            [k] do_syscall_64
   2.10%  mysqld              [.] buf_page_get_gen
   1.89%  [kernel]            [k] psi_task_change
   1.48%  mysqld              [.] LinuxAIOHandler::find_completed_slot
   1.36%  [kernel]            [k] syscall_return_via_sysret
   1.32%  [kernel]            [k] entry_SYSCALL_64
   0.91%  [kernel]            [k] try_to_wake_up
   0.88%  [kernel]            [k] ext4_es_lookup_extent
   0.85%  [kernel]            [k] _raw_spin_lock
   0.82%  [kernel]            [k] gup_pgd_range
   0.82%  libc-2.27.so        [.] cfree                                                                                                                                                                                                         0.81%  mysqld              [.] TrxUndoRsegsIterator::set_next
   0.67%  [kernel]            [k] do_blockdev_direct_IO
   0.59%  [kernel]            [k] _raw_spin_lock_irqsave
   0.59%  mysqld              [.] que_run_threads
   0.53%  [kernel]            [k] native_queued_spin_lock_slowpath
   0.52%  mysqld              [.] buf_flush_page_cleaner_coordinator
   0.52%  libc-2.27.so        [.] 0x000000000018ee6d
   0.50%  [kernel]            [k] __schedule
   0.49%  mysqld              [.] srv_worker_thread
   0.49%  [kernel]            [k] ahci_scr_read                                                                                                                                                                                                 0.47%  mysqld              [.] trx_purge
   0.46%  [kernel]            [k] ahci_handle_port_interrupt
   0.45%  [kernel]            [k] update_load_avg                                                                                                                                                                                               0.44%  [kernel]            [k] switch_fpu_return
   0.44%  mysqld              [.] mtr_t::Command::release_all                                                                                                                                                                                   0.43%  libc-2.27.so        [.] malloc                                                                                                                                                                                                        0.43%  [kernel]            [k] ahci_single_level_irq_intr
   0.43%  libpthread-2.27.so  [.] __pthread_mutex_lock                                                                                                                                                                                          0.42%  [kernel]            [k] native_sched_clock
   0.42%  [kernel]            [k] update_curr
   0.39%  [kernel]            [k] record_times
   0.39%  mysqld              [.] mtr_t::Command::release_blocks                                                                                                                                                                                0.39%  mysqld              [.] rw_lock_x_lock_func
   0.38%  [kernel]            [k] ahci_handle_port_intr
   0.38%  mysqld              [.] std::__adjust_heap<__gnu_cxx::__normal_iterator<TrxUndoRsegs*, std::vector<TrxUndoRsegs, ut_allocator<TrxUndoRsegs> > >, long, TrxUndoRsegs, __gnu_cxx::__ops::_Iter_comp_iter<TrxUndoRsegs> >
   0.37%  [kernel]            [k] perf_event_update_userpage
   0.36%  [kernel]            [k] __update_load_avg_cfs_rq
   0.35%  mysqld              [.] mlog_write_ulint                                                                                                                                                                                              0.35%  [kernel]            [k] pick_next_task_fair                                                                                                                                                                                           0.33%  [kernel]            [k] __audit_syscall_exit
   0.32%  [kernel]            [k] __update_load_avg_se                                                                                                                                                                                          0.32%  mysqld              [.] AIO::reserve_slot                                                                                                                                                                                             0.32%  mysqld              [.] buf_flush_do_batch
   0.31%  mysqld              [.] std::vector<trx_rseg_t*, ut_allocator<trx_rseg_t*> >::operator=
   0.31%  mysqld              [.] buf_flush_init_for_writing                                                                                                                                                                                    0.31%  libpthread-2.27.so  [.] __pthread_mutex_unlock
   0.31%  libpthread-2.27.so  [.] pthread_cond_wait@@GLIBC_2.3.2
   0.29%  mysqld              [.] buf_flush_remove
   0.29%  [kernel]            [k] available_idle_cpu
   0.28%  mysqld              [.] AIOHandler::post_io_processing
   0.27%  [kernel]            [k] enqueue_task_fair                                                                                                                                                                                             0.27%  mysqld              [.] 0x000000000123158d
   0.27%  mysqld              [.] LinuxAIOHandler::collect                                                                                                                                                                                      0.27%  [kernel]            [k] native_write_msr
For a higher level overview, try: perf top --sort comm,dso