Samples: 903K of event 'cycles', 4000 Hz, Event count (approx.): 13090341403 lost: 0/0 drop: 0/0
Overhead  Shared Object        Symbol
   6.54%  mysqld               [.] ut_delay
   3.04%  libpthread-2.27.so   [.] __pthread_mutex_cond_lock
   2.50%  libpthread-2.27.so   [.] __pthread_mutex_lock
   2.07%  [kernel]             [k] do_syscall_64
   1.96%  [kernel]             [k] psi_task_change
   0.99%  mysqld               [.] LinuxAIOHandler::find_completed_slot
   0.98%  [kernel]             [k] entry_SYSCALL_64
   0.95%  mysqld               [.] mtr_t::Command::add_dirty_blocks_to_flush_list
   0.95%  [kernel]             [k] syscall_return_via_sysret
   0.91%  mysqld               [.] Adaptive_flush::set_flush_target_by_lsn
   0.88%  mysqld               [.] TrxUndoRsegsIterator::set_next
   0.84%  mysqld               [.] Buf_fetch<Buf_fetch_normal>::single_page
   0.82%  [kernel]             [k] _raw_spin_lock
   0.76%  mysqld               [.] mlog_write_ulint
   0.75%  [kernel]             [k] visit_groups_merge
   0.63%  [kernel]             [k] native_queued_spin_lock_slowpath
   0.62%  mysqld               [.] buf_page_get_gen
   0.60%  [kernel]             [k] _raw_spin_lock_irqsave
   0.57%  libc-2.27.so         [.] malloc
   0.56%  [kernel]             [k] update_load_avg
   0.56%  [kernel]             [k] ext4_es_lookup_extent
   0.55%  mysqld               [.] PolicyMutex<TTASEventMutex<GenericPolicy> >::enter
   0.51%  [kernel]             [k] gup_pgd_range
   0.50%  mysqld               [.] 0x000000000266ddf7
   0.50%  mysqld               [.] Buf_fetch<Buf_fetch_normal>::lookup
   0.50%  mysqld               [.] PolicyMutex<TTASEventMutex<GenericPolicy> >::exit
   0.48%  [kernel]             [k] perf_event_update_userpage
   0.47%  mysqld               [.] page_simple_validate_new
   0.46%  mysqld               [.] log_buffer_reserve
   0.46%  [kernel]             [k] do_blockdev_direct_IO
   0.46%  mysqld               [.] 0x000000000261db20
   0.45%  [kernel]             [k] ahci_scr_read
   0.44%  [kernel]             [k] ahci_handle_port_interrupt
   0.44%  [kernel]             [k] update_curr
   0.44%  [kernel]             [k] switch_fpu_return
   0.42%  [kernel]             [k] __schedule
   0.41%  libc-2.27.so         [.] cfree
   0.41%  [kernel]             [k] native_sched_clock
   0.41%  mysqld               [.] 0x000000000266ddc9
   0.40%  [kernel]             [k] ahci_single_level_irq_intr
   0.40%  mysqld               [.] log_buffer_write
   0.39%  [kernel]             [k] try_to_wake_up
   0.38%  mysqld               [.] 0x000000000266e011
   0.38%  mysqld               [.] rw_lock_x_lock_func
   0.37%  mysqld               [.] Buf_fetch_normal::get
   0.37%  mysqld               [.] buf_page_t::was_stale
   0.37%  [kernel]             [k] __update_load_avg_cfs_rq
   0.36%  [kernel]             [k] available_idle_cpu
   0.36%  [kernel]             [k] record_times
   0.35%  libpthread-2.27.so   [.] __pthread_mutex_unlock
   0.34%  [kernel]             [k] ahci_handle_port_intr
   0.33%  [kernel]             [k] update_cfs_group
   0.32%  mysqld               [.] 0x00000000025d4eab
   0.32%  mysqld               [.] 0x00000000025d42e7
   0.32%  [kernel]             [k] select_idle_sibling
   0.31%  [kernel]             [k] select_task_rq_fair
   0.31%  libpthread-2.27.so   [.] pthread_cond_wait@@GLIBC_2.3.2
For a higher level overview, try: perf top --sort comm,dso