Samples: 1M of event 'cycles', 4000 Hz, Event count (approx.): 34303591913 lost: 0/0 drop: 0/1
Overhead  Shared Object        Symbol
  19.87%  mysqld               [.] log_writer
   6.34%  mysqld               [.] log_advance_ready_for_write_lsn
   3.86%  [kernel]             [k] do_syscall_64
   2.92%  mysqld               [.] ut_delay
   1.73%  [kernel]             [k] syscall_return_via_sysret
   1.65%  [kernel]             [k] entry_SYSCALL_64
   1.54%  libpthread-2.31.so   [.] __pthread_mutex_lock
   1.21%  [kernel]             [k] psi_task_change
   0.98%  libpthread-2.31.so   [.] __pthread_mutex_cond_lock
   0.63%  mysqld               [.] LinuxAIOHandler::find_completed_slot
   0.58%  [kernel]             [k] _raw_spin_lock_irqsave
   0.57%  [kernel]             [k] start_this_handle
   0.54%  [kernel]             [k] copy_user_enhanced_fast_string
   0.47%  [kernel]             [k] _raw_spin_lock
   0.46%  mysqld               [.] log_update_buf_limit
   0.45%  [kernel]             [k] jbd2_journal_stop
   0.44%  mysqld               [.] Adaptive_flush::set_flush_target_by_lsn
   0.43%  [kernel]             [k] ext4_da_write_begin
   0.42%  [kernel]             [k] kmem_cache_alloc
   0.41%  [kernel]             [k] __fget
   0.39%  mysqld               [.] Fil_shard::do_redo_io
   0.38%  libpthread-2.31.so   [.] __pthread_mutex_unlock
   0.38%  [kernel]             [k] native_queued_spin_lock_slowpath
   0.37%  [kernel]             [k] visit_groups_merge
   0.36%  [kernel]             [k] update_load_avg
   0.36%  [kernel]             [k] kmem_cache_free
   0.36%  mysqld               [.] mtr_t::Command::add_dirty_blocks_to_flush_list
   0.34%  mysqld               [.] Buf_fetch<Buf_fetch_normal>::single_page
   0.34%  mysqld               [.] log_files_real_offset_for_lsn
   0.34%  mysqld               [.] TrxUndoRsegsIterator::set_next
   0.32%  mysqld               [.] Buf_fetch_normal::get
   0.32%  mysqld               [.] PolicyMutex<TTASEventMutex<GenericPolicy> >::exit
   0.31%  libc-2.31.so         [.] 0x000000000018ead1
   0.31%  [kernel]             [k] iov_iter_fault_in_readable
   0.31%  [kernel]             [k] xas_load
   0.31%  [kernel]             [k] _raw_read_lock
   0.31%  [kernel]             [k] __block_commit_write.isra.0
   0.31%  [kernel]             [k] ext4_file_write_iter
   0.31%  mysqld               [.] 0x00000000027085df
   0.30%  [kernel]             [k] switch_fpu_return
   0.30%  [kernel]             [k] ext4_es_lookup_extent
   0.30%  [kernel]             [k] ahci_scr_read
   0.30%  [kernel]             [k] __audit_syscall_exit
   0.29%  [kernel]             [k] common_file_perm
   0.29%  mysqld               [.] page_simple_validate_new
   0.28%  mysqld               [.] PolicyMutex<TTASEventMutex<GenericPolicy> >::enter
   0.28%  mysqld               [.] 0x0000000002865370
   0.27%  [kernel]             [k] ahci_handle_port_interrupt
   0.27%  [kernel]             [k] __sched_text_start
   0.27%  [kernel]             [k] ahci_single_level_irq_intr
   0.27%  libpthread-2.31.so   [.] __libc_pwrite64
   0.27%  [kernel]             [k] add_transaction_credits
   0.26%  libc-2.31.so         [.] malloc
   0.26%  mysqld               [.] mlog_write_ulint
   0.26%  [kernel]             [k] try_to_wake_up
   0.26%  [kernel]             [k] ext4_da_write_end
   0.25%  [kernel]             [k] find_get_entry
For a higher level overview, try: perf top --sort comm,dso