# Samples: 15873 # # Overhead Command Shared Object Symbol # ........ ....... ....................... ...... # 40.32% dd [kernel] [k] __copy_from_user_ll_nozero 22.49% dd [kernel] [k] __clear_user 3.06% dd [kernel] [k] get_page_from_freelist 1.18% dd [kernel] [k] ext4_mark_iloc_dirty 1.13% dd [kernel] [k] __set_page_dirty 1.13% dd [kernel] [k] scsi_dispatch_cmd 0.93% dd [kernel] [k] __block_prepare_write 0.93% dd [kernel] [k] scsi_request_fn 0.81% dd [kernel] [k] kmem_cache_alloc 0.80% dd [kernel] [k] __ext4_get_inode_loc 0.64% dd [kernel] [k] ext4_da_get_block_prep 0.62% dd [kernel] [k] ext4_da_write_end 0.62% dd [kernel] [k] jbd2_journal_stop 0.57% dd [kernel] [k] add_to_page_cache_locked 0.49% dd [kernel] [k] create_empty_buffers 0.47% dd [kernel] [k] ext4_ext_calc_metadata_amount 0.46% dd [kernel] [k] ext4_da_write_begin 0.45% dd [kernel] [k] iov_iter_fault_in_readable 0.45% dd [kernel] [k] start_this_handle 0.43% perf [kernel] [k] generic_file_buffered_write 0.41% dd [kernel] [k] __find_get_block 0.36% dd [kernel] [k] __wake_up_bit 0.34% dd [kernel] [k] __alloc_pages_nodemask 0.34% dd [kernel] [k] __block_commit_write 0.32% dd [kernel] [k] generic_file_buffered_write 0.32% dd [kernel] [k] jbd2_journal_start 0.32% dd [kernel] [k] radix_tree_lookup_slot 0.30% dd [kernel] [k] ext4_get_blocks 0.29% perf [kernel] [k] number 0.28% perf [kernel] [k] vsnprintf 0.28% dd [kernel] [k] do_get_write_access 0.28% dd [kernel] [k] blk_end_bidi_request 0.27% dd [kernel] [k] __mark_inode_dirty 0.26% perf [kernel] [k] __generic_file_aio_write 0.24% dd [kernel] [k] ext4_ext_get_blocks 0.23% perf [kernel] [k] nobh_write_begin 0.23% perf [kernel] [k] __copy_from_user_ll_nozero 0.23% dd [kernel] [k] generic_write_end 0.23% dd [kernel] [k] ext4_journal_start_sb 0.23% dd [kernel] [k] jbd2_journal_add_journal_head 0.22% dd [kernel] [k] find_get_page 0.22% dd [kernel] [k] kmem_cache_free 0.22% dd [kernel] [k] ata_sff_interrupt 0.21% dd [kernel] [k] mark_page_accessed 0.21% dd [kernel] [k] __ext4_journal_stop 0.21% dd [kernel] [k] T.1339 0.21% dd [kernel] [k] handle_mm_fault 0.20% dd [kernel] [k] ____pagevec_lru_add 0.20% perf [kernel] [k] extAlloc 0.20% perf [kernel] [k] format_decode 0.20% dd [kernel] [k] alloc_page_buffers 0.19% dd [kernel] [k] unlock_page 0.18% perf [kernel] [k] T.1339 0.17% perf [kernel] [k] nobh_write_end 0.17% dd [kernel] [k] block_write_end 0.17% dd [kernel] [k] read_zero 0.16% perf [kernel] [k] scsi_dispatch_cmd 0.16% dd [kernel] [k] __wake_up 0.16% dd [kernel] [k] wake_up_bit 0.16% dd [kernel] [k] balance_dirty_pages_ratelimited_nr 0.16% dd [kernel] [k] __lru_cache_add 0.16% perf [kernel] [k] dbAlloc 0.16% dd [kernel] [k] mark_buffer_dirty 0.16% dd [kernel] [k] __find_get_block_slow 0.15% perf [kernel] [k] do_page_fault 0.15% dd [kernel] [k] add_to_page_cache_lru 0.15% dd [kernel] [k] grab_cache_page_write_begin 0.15% dd [kernel] [k] ext4_dirty_inode 0.14% perf [kernel] [k] __jfs_getxattr 0.14% perf [kernel] [k] find_get_page 0.14% perf [kernel] [k] generic_file_aio_write 0.14% perf [kernel] [k] get_page_from_freelist 0.13% dd [kernel] [k] __rcu_read_unlock 0.13% dd [kernel] [k] iov_iter_copy_from_user_atomic 0.13% dd [kernel] [k] ext4_has_free_blocks 0.13% dd [kernel] [k] ext4_inode_table 0.13% perf [kernel] [k] vfs_write 0.13% perf [kernel] [k] __mark_inode_dirty 0.12% perf [kernel] [k] iov_iter_fault_in_readable 0.12% perf [kernel] [k] copy_page_range 0.12% dd [kernel] [k] __rcu_process_callbacks 0.11% perf [kernel] [k] do_sync_write 0.11% dd [kernel] [k] put_page 0.11% dd [kernel] [k] ext4_claim_free_blocks 0.11% dd [kernel] [k] ext4_mark_inode_dirty 0.11% perf [kernel] [k] sysenter_past_esp 0.11% perf [kernel] [k] iov_iter_advance 0.11% dd [kernel] [k] up_read 0.11% dd [kernel] [k] rcu_process_gp_end 0.11% dd [kernel] [k] ext4_get_group_desc 0.11% dd [kernel] [k] ext4_get_inode_flags 0.11% dd [kernel] [k] __ext4_journal_get_write_access 0.11% dd [kernel] [k] jbd2_journal_dirty_metadata 0.10% perf [kernel] [k] getnstimeofday 0.10% perf [kernel] [k] iov_iter_copy_from_user_atomic 0.10% perf [kernel] [k] rw_verify_area 0.10% perf [kernel] [k] jfs_write_begin 0.10% perf [kernel] [k] acpi_pm_read 0.10% dd [kernel] [k] check_for_new_grace_period 0.09% perf [kernel] [k] __set_page_dirty 0.09% perf [kernel] [k] xtSearch 0.09% dd [kernel] [k] ext4_reserve_inode_write 0.09% dd [kernel] [k] blk_update_request 0.09% dd [kernel] [k] down_read 0.09% dd [kernel] [k] do_page_fault 0.09% dd [kernel] [k] ehci_watchdog [ehci_hcd] 0.09% dd [kernel] [k] __do_softirq 0.09% dd [kernel] [k] __rcu_read_lock 0.09% dd [kernel] [k] iov_iter_advance 0.09% dd [kernel] [k] find_lock_page 0.09% dd [kernel] [k] zone_watermark_ok 0.09% dd [kernel] [k] next_zones_zonelist 0.08% perf [vdso] [.] 0x000000ffffe424 0.08% perf [kernel] [k] __do_fault 0.08% perf [kernel] [k] scsi_request_fn 0.08% dd [kernel] [k] test_clear_page_writeback 0.08% dd [kernel] [k] block_write_begin 0.08% dd [kernel] [k] jbd2_journal_get_write_access 0.08% perf [kernel] [k] generic_segment_checks 0.08% perf [kernel] [k] mark_page_accessed 0.08% perf [kernel] [k] ea_get 0.07% perf [kernel] [k] sys_gettimeofday 0.07% perf [kernel] [k] __rcu_read_unlock 0.07% perf [kernel] [k] grab_cache_page_write_begin 0.07% perf [kernel] [k] __set_page_dirty_buffers 0.07% perf [kernel] [k] xtLookup 0.07% perf [kernel] [k] dbAllocBits 0.07% perf [kernel] [k] dbAllocNext 0.07% dd [kernel] [k] handle_IRQ_event 0.07% dd [kernel] [k] unmap_vmas 0.07% dd [kernel] [k] set_bh_page 0.07% dd [kernel] [k] end_buffer_async_write 0.07% dd [kernel] [k] radix_tree_preload 0.06% perf [kernel] [k] file_update_time 0.06% perf [kernel] [k] __get_metapage 0.06% dd [kernel] [k] release_pages 0.06% dd [kernel] [k] __getblk 0.06% perf [kernel] [k] balance_dirty_pages_ratelimited_nr 0.06% perf [kernel] [k] sys_write 0.06% perf [kernel] [k] inotify_dentry_parent_queue_event 0.06% dd [kernel] [k] down_read_trylock 0.06% dd [kernel] [k] alloc_buffer_head 0.06% dd [kernel] [k] jbd2_journal_cancel_revoke 0.06% dd [kernel] [k] mix_pool_bytes_extract 0.05% perf [kernel] [k] file_remove_suid 0.05% perf [kernel] [k] __alloc_pages_nodemask 0.05% perf [kernel] [k] put_page 0.05% perf [kernel] [k] kfree 0.05% perf [kernel] [k] jfs_get_block 0.05% perf [kernel] [k] xtExtend 0.05% perf [kernel] [k] radix_tree_lookup_slot 0.05% perf [kernel] [k] copy_to_user 0.05% dd [kernel] [k] __page_cache_alloc 0.05% dd [kernel] [k] __jbd2_log_space_left 0.05% dd [kernel] [k] scsi_init_cmd_errh 0.04% perf [kernel] [k] find_lock_page 0.04% perf [kernel] [k] do_wp_page 0.04% perf [kernel] [k] fget_light 0.04% perf [kernel] [k] fsnotify 0.04% perf [kernel] [k] extHint 0.04% perf [kernel] [k] strchr 0.04% perf [kernel] [k] schedule 0.04% dd [kernel] [k] __ext4_handle_dirty_metadata 0.04% dd [kernel] [k] spin_unlock 0.04% dd [kernel] [k] jbd2_journal_put_journal_head 0.04% dd [kernel] [k] scsi_finish_command 0.04% dd [kernel] [k] _cond_resched 0.04% perf [kernel] [k] set_page_dirty 0.04% perf [kernel] [k] handle_mm_fault 0.04% perf [kernel] [k] kmem_cache_alloc 0.04% perf [kernel] [k] seq_printf 0.04% perf [kernel] [k] generic_write_sync 0.04% perf [kernel] [k] jfs_dirty_inode 0.04% perf /home/cloos/bin/perf [.] __cmd_record 0.04% dd [kernel] [k] free_hot_cold_page 0.04% dd [kernel] [k] mdio_ctrl_hw 0.03% perf [kernel] [k] should_remove_suid 0.03% perf [kernel] [k] add_to_page_cache_locked 0.03% perf [kernel] [k] test_clear_page_writeback 0.03% perf [kernel] [k] kmem_cache_free 0.03% perf [kernel] [k] prepend 0.03% perf [kernel] [k] inotify_inode_queue_event 0.03% perf [kernel] [k] dbAllocDmap 0.03% perf [kernel] [k] ea_release 0.03% perf [kernel] [k] mutex_lock 0.03% dd [kernel] [k] kmem_cache_alloc_notrace 0.03% dd [kernel] [k] add_timer_randomness 0.03% dd [kernel] [k] scsi_put_command 0.03% dd [kernel] [k] scsi_run_queue 0.03% perf [kernel] [k] __do_softirq 0.03% perf [kernel] [k] __wake_up_bit 0.03% perf [kernel] [k] current_kernel_time 0.03% perf [kernel] [k] do_gettimeofday 0.03% perf [kernel] [k] __rcu_read_lock 0.03% perf [kernel] [k] zone_watermark_ok 0.03% perf [kernel] [k] ____pagevec_lru_add 0.03% perf [kernel] [k] __lru_cache_add 0.03% perf [kernel] [k] find_vma 0.03% perf [kernel] [k] inode_add_bytes 0.03% perf [kernel] [k] __fsnotify_parent 0.03% perf [kernel] [k] dbAdjTree 0.03% perf [kernel] [k] spin_unlock 0.03% perf [kernel] [k] security_inode_need_killpriv 0.03% perf [kernel] [k] radix_tree_preload 0.03% perf [kernel] [k] down_read 0.03% dd [kernel] [k] find_vma 0.03% dd [kernel] [k] unmap_underlying_metadata 0.03% dd [kernel] [k] scsi_handle_queue_ramp_up 0.03% dd [kernel] [k] scsi_softirq_done 0.02% perf [kernel] [k] __wake_up 0.02% perf [kernel] [k] up_read 0.02% perf [kernel] [k] perf_mmap_fault 0.02% perf [kernel] [k] unlock_page 0.02% perf [kernel] [k] vm_normal_page 0.02% perf [kernel] [k] mnt_clone_write 0.02% perf [kernel] [k] alloc_page_buffers 0.02% perf [kernel] [k] jfs_getxattr 0.02% perf [kernel] [k] cap_file_permission 0.02% perf [kernel] [k] blk_end_bidi_request 0.02% perf [kernel] [k] __make_request 0.02% perf [kernel] [k] _atomic_dec_and_lock 0.02% perf [kernel] [k] put_dec 0.02% perf [kernel] [k] strncmp 0.02% perf [kernel] [k] strlen 0.02% perf [kernel] [k] mutex_unlock 0.02% perf /home/cloos/bin/perf [.] pid_synthesize_mmap_samples 0.02% dd [kernel] [k] __do_fault 0.02% dd [kernel] [k] page_add_new_anon_rmap 0.02% dd [kernel] [k] end_bio_bh_io_sync 0.02% dd [kernel] [k] ext4_get_inode_loc 0.02% dd [kernel] [k] req_bio_endio 0.02% dd [kernel] [k] blk_update_bidi_request 0.02% dd [kernel] [k] __make_request 0.02% dd [kernel] [k] blk_done_softirq 0.02% dd [kernel] [k] disk_map_sector_rcu 0.02% dd [kernel] [k] kobject_get 0.02% dd [kernel] [k] scsi_io_completion 0.01% perf [kernel] [k] timespec_trunc 0.01% perf [kernel] [k] current_fs_time 0.01% perf [kernel] [k] hrtimer_try_to_cancel 0.01% perf [kernel] [k] rcu_sched_qs 0.01% perf [kernel] [k] __page_cache_alloc 0.01% perf [kernel] [k] add_to_page_cache_lru 0.01% perf [kernel] [k] read_cache_page_async 0.01% perf [kernel] [k] filemap_fault 0.01% perf [kernel] [k] poll_freewait 0.01% perf [kernel] [k] __d_path 0.01% perf [kernel] [k] mangle_path 0.01% perf [kernel] [k] __find_get_block_slow 0.01% perf [kernel] [k] unmap_underlying_metadata 0.01% perf [kernel] [k] show_map_vma 0.01% perf [kernel] [k] dbSplit 0.01% perf [kernel] [k] txLock 0.01% perf [kernel] [k] cap_inode_need_killpriv 0.01% perf [kernel] [k] put_dec_trunc 0.01% perf [kernel] [k] scsi_pool_free_command 0.01% perf [kernel] [k] ata_sff_interrupt 0.01% perf [kernel] [k] _cond_resched 0.01% perf [kernel] [k] preempt_schedule 0.01% perf [kernel] [k] ehci_watchdog [ehci_hcd] 0.01% dd [kernel] [k] try_to_wake_up 0.01% dd [kernel] [k] mempool_free 0.01% dd [kernel] [k] get_pageblock_flags_group 0.01% dd [kernel] [k] page_evictable 0.01% dd [kernel] [k] vm_normal_page 0.01% dd [kernel] [k] do_mmap_pgoff 0.01% dd [kernel] [k] fget_light 0.01% dd [kernel] [k] file_update_time 0.01% dd [kernel] [k] mnt_want_write_file 0.01% dd [kernel] [k] __brelse 0.01% dd [kernel] [k] unlock_buffer 0.01% dd [kernel] [k] bio_free 0.01% dd [kernel] [k] kobject_put 0.01% dd [kernel] [k] kref_get 0.01% dd [kernel] [k] credit_entropy_bits 0.01% dd [kernel] [k] __scsi_release_buffers 0.01% dd [kernel] [k] scsi_device_unbusy 0.01% dd [kernel] [k] yenta_interrupt 0.01% dd [kernel] [k] netif_receive_skb 0.01% dd /lib/libc-2.11.so [.] __GI___printf_fp 0.01% dd /lib/libc-2.11.so [.] _dl_addr 0.01% dd /lib/ld-2.11.so [.] _dl_lookup_symbol_x 0.01% dd /bin/dd [.] dd_copy 0.01% dd 804fa9d [.] 0x0000000804fa9d 0.01% perf [kernel] [k] sysenter_do_call 0.01% perf [kernel] [k] dup_mm 0.01% perf [kernel] [k] get_pid_task 0.01% perf [kernel] [k] down_read_trylock 0.01% perf [kernel] [k] module_put 0.01% perf [kernel] [k] do_read_cache_page 0.01% perf [kernel] [k] page_evictable 0.01% perf [kernel] [k] next_zones_zonelist 0.01% perf [kernel] [k] lock_page 0.01% perf [kernel] [k] __vma_link_rb 0.01% perf [kernel] [k] __vm_enough_memory 0.01% perf [kernel] [k] __anon_vma_link 0.01% perf [kernel] [k] page_add_file_rmap 0.01% perf [kernel] [k] page_remove_rmap 0.01% perf [kernel] [k] anon_vma_unlink 0.01% perf [kernel] [k] kmem_cache_alloc_notrace 0.01% perf [kernel] [k] do_sys_open 0.01% perf [kernel] [k] sys_read 0.01% perf [kernel] [k] generic_fillattr 0.01% perf [kernel] [k] acl_permission_check 0.01% perf [kernel] [k] path_walk 0.01% perf [kernel] [k] do_sys_poll 0.01% perf [kernel] [k] d_path 0.01% perf [kernel] [k] __d_lookup 0.01% perf [kernel] [k] dput 0.01% perf [kernel] [k] dup_fd 0.01% perf [kernel] [k] mnt_drop_write 0.01% perf [kernel] [k] mnt_want_write_file 0.01% perf [kernel] [k] free_buffer_head 0.01% perf [kernel] [k] bio_put 0.01% perf [kernel] [k] m_next 0.01% perf [kernel] [k] show_map 0.01% perf [kernel] [k] m_start 0.01% perf [kernel] [k] proc_lookup_de 0.01% perf [kernel] [k] proc_pid_status 0.01% perf [kernel] [k] release_metapage 0.01% perf [kernel] [k] txBeginAnon 0.01% perf [kernel] [k] security_file_permission 0.01% perf [kernel] [k] security_inode_getattr 0.01% perf [kernel] [k] cap_task_to_inode 0.01% perf [kernel] [k] blk_update_request 0.01% perf [kernel] [k] get_request_wait 0.01% perf [kernel] [k] rb_insert_color 0.01% perf [kernel] [k] string 0.01% perf [kernel] [k] strnlen 0.01% perf [kernel] [k] mix_pool_bytes_extract 0.01% perf [kernel] [k] scsi_handle_queue_ramp_up 0.01% perf [kernel] [k] scsi_decide_disposition 0.01% perf [kernel] [k] scsi_init_cmd_errh 0.01% perf [kernel] [k] scsi_io_completion 0.01% perf /lib/libpthread-2.11.so [.] __libc_write 0.01% perf /lib/libc-2.11.so [.] _IO_getline_internal 0.01% perf /lib/libc-2.11.so [.] _IO_default_xsputn_internal 0.01% perf /lib/libc-2.11.so [.] __GI___gettimeofday_internal 0.01% dd [kernel] [k] do_group_exit 0.01% dd [kernel] [k] __queue_work 0.01% dd [kernel] [k] prepare_creds 0.01% dd [kernel] [k] commit_creds 0.01% dd [kernel] [k] rcu_bh_qs 0.01% dd [kernel] [k] __generic_file_aio_write 0.01% dd [kernel] [k] do_wp_page 0.01% dd [kernel] [k] __vm_enough_memory 0.01% dd [kernel] [k] vma_adjust 0.01% dd [kernel] [k] spin_unlock 0.01% dd [kernel] [k] anon_vma_prepare 0.01% dd [kernel] [k] rw_verify_area 0.01% dd [kernel] [k] file_free_rcu 0.01% dd [kernel] [k] __fput 0.01% dd [kernel] [k] path_get 0.01% dd [kernel] [k] __d_lookup 0.01% dd [kernel] [k] submit_bh 0.01% dd [kernel] [k] bio_put 0.01% dd [kernel] [k] bio_fs_destructor 0.01% dd [kernel] [k] fsnotify 0.01% dd [kernel] [k] inotify_inode_queue_event 0.01% dd [kernel] [k] ext4_check_dir_entry 0.01% dd [kernel] [k] ext4_find_entry 0.01% dd [kernel] [k] dtSearch 0.01% dd [kernel] [k] cap_inode_need_killpriv 0.01% dd [kernel] [k] get_vfs_caps_from_disk 0.01% dd [kernel] [k] blk_end_request 0.01% dd [kernel] [k] blk_run_queue 0.01% dd [kernel] [k] kref_put 0.01% dd [kernel] [k] rb_insert_color 0.01% dd [kernel] [k] sha_transform 0.01% dd [kernel] [k] csum_partial 0.01% dd [kernel] [k] strnlen_user 0.01% dd [kernel] [k] _copy_from_user 0.01% dd [kernel] [k] __sg_free_table 0.01% dd [kernel] [k] add_disk_randomness 0.01% dd [kernel] [k] n_tty_write 0.01% dd [kernel] [k] get_device 0.01% dd [kernel] [k] scsi_log_completion 0.01% dd [kernel] [k] scsi_pool_free_command 0.01% dd [kernel] [k] scsi_decide_disposition 0.01% dd [kernel] [k] scsi_sg_free 0.01% dd [kernel] [k] __alloc_skb 0.01% dd [kernel] [k] tcp_v4_rcv 0.01% dd [kernel] [k] schedule 0.01% dd [kernel] [k] preempt_schedule 0.01% dd [kernel] [k] usb_hcd_irq [usbcore] 0.01% dd /lib/libc-2.11.so [.] __GI_getenv 0.01% dd /lib/libc-2.11.so [.] _IO_new_do_write 0.01% dd /lib/libc-2.11.so [.] __GI_strcmp 0.01% dd /lib/libc-2.11.so [.] __GI___libc_read 0.01% dd /lib/ld-2.11.so [.] security_init 0.01% dd /lib/ld-2.11.so [.] _dl_map_object 0.01% dd /lib/ld-2.11.so [.] do_lookup_x 0.01% dd /lib/ld-2.11.so [.] _dl_relocate_object 0.01% dd /lib/ld-2.11.so [.] 0x0000000000baa4 0.01% dd /lib/ld-2.11.so [.] _dl_fixup 0.01% dd /lib/ld-2.11.so [.] _dl_name_match_p 0.01% dd /bin/dd [.] print_stats 0.01% dd /bin/dd [.] iread # # (For a higher level overview, try: perf report --sort comm,dso) #