Samples: 1M of event 'cycles', 4000 Hz, Event count (approx.): 34471567542 lost: 0/0 drop: 0/0
Overhead  Shared Object        Symbol
   4.57%  [kernel]             [k] try_to_wake_up
   4.56%  mysqld               [.] log_writer
   4.10%  [kernel]             [k] do_syscall_64
   3.89%  mysqld               [.] ut_delay
   2.22%  [kernel]             [k] psi_task_change
   1.87%  [kernel]             [k] syscall_return_via_sysret
   1.80%  [kernel]             [k] entry_SYSCALL_64
   1.56%  mysqld               [.] log_advance_ready_for_write_lsn
   1.28%  [kernel]             [k] native_queued_spin_lock_slowpath
   0.94%  mysqld               [.] mtr_t::Command::add_dirty_blocks_to_flush_list
   0.94%  libpthread-2.27.so   [.] __pthread_mutex_lock
   0.75%  [kernel]             [k] _raw_spin_lock
   0.69%  mysqld               [.] mlog_write_ulint
   0.67%  mysqld               [.] TrxUndoRsegsIterator::set_next
   0.63%  [kernel]             [k] enqueue_task_fair
   0.62%  [kernel]             [k] record_times
   0.57%  mysqld               [.] Buf_fetch<Buf_fetch_normal>::single_page
   0.56%  [kernel]             [k] available_idle_cpu
   0.56%  [kernel]             [k] update_load_avg
   0.55%  [kernel]             [k] copy_user_enhanced_fast_string
   0.54%  mysqld               [.] LinuxAIOHandler::find_completed_slot
   0.54%  [kernel]             [k] _raw_spin_lock_irqsave
   0.53%  mysqld               [.] PolicyMutex<TTASEventMutex<GenericPolicy> >::enter
   0.53%  [kernel]             [k] update_curr
   0.51%  mysqld               [.] PolicyMutex<TTASEventMutex<GenericPolicy> >::exit
   0.51%  [kernel]             [k] futex_wake
   0.50%  [kernel]             [k] select_idle_sibling
   0.49%  mysqld               [.] log_buffer_reserve
   0.48%  mysqld               [.] buf_page_get_gen
   0.47%  libpthread-2.27.so   [.] pthread_cond_broadcast@@GLIBC_2.3.2
   0.43%  libpthread-2.27.so   [.] __pthread_mutex_unlock
   0.43%  mysqld               [.] Buf_fetch<Buf_fetch_normal>::lookup
   0.42%  mysqld               [.] log_buffer_write
   0.40%  [kernel]             [k] __update_load_avg_cfs_rq
   0.39%  [kernel]             [k] __fget
   0.39%  [kernel]             [k] native_sched_clock
   0.39%  mysqld               [.] Adaptive_flush::set_flush_target_by_lsn
   0.39%  [kernel]             [k] start_this_handle
   0.37%  [kernel]             [k] jbd2_journal_stop
   0.37%  [kernel]             [k] __update_load_avg_se
   0.36%  [kernel]             [k] xas_load
   0.36%  [kernel]             [k] __audit_syscall_exit
   0.35%  [kernel]             [k] kmem_cache_alloc
   0.35%  [kernel]             [k] ext4_da_write_begin
   0.35%  mysqld               [.] 0x00000000024d59e1
   0.35%  mysqld               [.] rw_lock_x_lock_func
   0.34%  [kernel]             [k] update_cfs_group
   0.33%  mysqld               [.] 0x000000000266ddc9
   0.33%  mysqld               [.] 0x000000000261db20
   0.33%  mysqld               [.] log_update_buf_limit
   0.33%  [kernel]             [k] visit_groups_merge
   0.32%  [kernel]             [k] update_rq_clock.part.82
   0.31%  mysqld               [.] 0x000000000266e011
   0.31%  [kernel]             [k] enqueue_entity
   0.30%  mysqld               [.] 0x000000000266ddf7
   0.30%  mysqld               [.] Buf_fetch_normal::get
   0.29%  mysqld               [.] 0x000000000261dad0
For a higher level overview, try: perf top --sort comm,dso