# Samples: 25313 # # Overhead Command Shared Object Symbol # ........ ....... ....................... ...... # 17.81% dd [kernel] [k] __copy_to_user_ll 12.23% dd [kernel] [k] do_mpage_readpage 9.82% dd [kernel] [k] get_page_from_freelist 3.43% dd [kernel] [k] __blk_recalc_rq_segments 3.37% dd [kernel] [k] generic_file_aio_read 3.37% dd [kernel] [k] __bio_add_page 3.34% dd [kernel] [k] add_to_page_cache_locked 2.82% dd [kernel] [k] file_read_actor 2.68% dd [kernel] [k] __alloc_pages_nodemask 1.96% dd [kernel] [k] scsi_request_fn 1.89% dd [kernel] [k] scsi_dispatch_cmd 1.83% dd [kernel] [k] __do_page_cache_readahead 1.76% dd [kernel] [k] find_get_page 1.59% dd [kernel] [k] ____pagevec_lru_add 1.55% dd [kernel] [k] put_page 1.46% dd [kernel] [k] __rcu_read_unlock 1.33% dd [kernel] [k] zone_watermark_ok 1.29% dd [kernel] [k] mpage_readpages 1.16% dd [kernel] [k] __lru_cache_add 1.01% dd [kernel] [k] bio_add_page 0.98% dd [kernel] [k] add_to_page_cache_lru 0.83% dd [kernel] [k] next_zones_zonelist 0.66% dd [kernel] [k] radix_tree_lookup_slot 0.66% dd [kernel] [k] radix_tree_preload 0.60% perf [kernel] [k] generic_file_buffered_write 0.56% dd [kernel] [k] __rcu_read_lock 0.56% dd [kernel] [k] blk_end_bidi_request 0.56% dd [kernel] [k] __make_request 0.51% dd [kernel] [k] radix_tree_lookup 0.49% dd [kernel] [k] get_request 0.42% perf [kernel] [k] __generic_file_aio_write 0.40% dd [kernel] [k] _cond_resched 0.39% dd [kernel] [k] unmap_vmas 0.39% dd [kernel] [k] do_page_fault 0.38% dd [kernel] [k] kmem_cache_alloc 0.36% dd [kernel] [k] schedule 0.32% dd [kernel] [k] handle_mm_fault 0.31% dd [kernel] [k] mark_page_accessed 0.29% perf [kernel] [k] T.1339 0.27% dd [kernel] [k] generic_make_request 0.26% dd [kernel] [k] mpage_end_io_read 0.25% perf [kernel] [k] find_get_page 0.25% dd [kernel] [k] T.1339 0.24% perf [kernel] [k] nobh_write_begin 0.22% perf [kernel] [k] xtSearch 0.22% dd [kernel] [k] free_hot_cold_page 0.22% dd [kernel] [k] ata_sff_interrupt 0.22% perf [kernel] [k] sysenter_past_esp 0.22% perf [kernel] [k] __jfs_getxattr 0.21% perf [kernel] [k] iov_iter_advance 0.21% perf [kernel] [k] vfs_write 0.20% perf [kernel] [k] nobh_write_end 0.20% dd [kernel] [k] ext4_get_blocks 0.19% perf [kernel] [k] iov_iter_copy_from_user_atomic 0.18% perf [kernel] [k] do_sync_write 0.18% perf [kernel] [k] generic_file_aio_write 0.17% dd [kernel] [k] ext4_ext_get_blocks 0.17% perf [kernel] [k] __copy_from_user_ll_nozero 0.16% perf [kernel] [k] extAlloc 0.15% perf [kernel] [k] dbAlloc 0.15% perf [kernel] [k] number 0.15% dd [kernel] [k] sha_transform 0.15% perf [kernel] [k] getnstimeofday 0.15% perf [kernel] [k] rw_verify_area 0.14% dd [kernel] [k] handle_IRQ_event 0.14% dd [kernel] [k] __do_softirq 0.13% perf [kernel] [k] sys_write 0.13% perf [kernel] [k] vsnprintf 0.13% dd [kernel] [k] ext4_data_block_valid 0.13% dd [kernel] [k] blk_rq_init 0.13% dd [kernel] [k] cfq_set_request 0.13% dd [kernel] [k] ehci_watchdog [ehci_hcd] 0.12% perf [kernel] [k] get_page_from_freelist 0.12% perf [kernel] [k] generic_segment_checks 0.12% dd [kernel] [k] __wake_up_bit 0.12% dd [kernel] [k] get_pageblock_flags_group 0.11% perf [kernel] [k] balance_dirty_pages_ratelimited_nr 0.11% perf [kernel] [k] jfs_write_begin 0.11% perf [kernel] [k] acpi_pm_read 0.11% dd [kernel] [k] bio_alloc_bioset 0.11% dd [kernel] [k] rcu_sched_qs 0.11% perf [kernel] [k] ea_get 0.10% perf [kernel] [k] __rcu_read_unlock 0.10% perf [kernel] [k] __set_page_dirty 0.10% dd [kernel] [k] __wake_up 0.09% perf [vdso] [.] 0x000000ffffe424 0.09% perf [kernel] [k] grab_cache_page_write_begin 0.09% perf [kernel] [k] fsnotify 0.09% perf [kernel] [k] __mark_inode_dirty 0.09% perf [kernel] [k] radix_tree_lookup_slot 0.09% dd [kernel] [k] ext4_get_block 0.09% dd [kernel] [k] blk_update_request 0.08% perf [kernel] [k] iov_iter_fault_in_readable 0.08% perf [kernel] [k] put_page 0.08% perf [kernel] [k] file_remove_suid 0.08% perf [kernel] [k] unlock_page 0.08% perf [kernel] [k] copy_page_range 0.08% perf [kernel] [k] schedule 0.08% perf [kernel] [k] copy_to_user 0.08% dd [kernel] [k] ondemand_readahead 0.08% dd [kernel] [k] release_pages 0.08% dd [kernel] [k] mix_pool_bytes_extract 0.07% perf [kernel] [k] mark_page_accessed 0.07% perf [kernel] [k] __get_metapage 0.07% perf [kernel] [k] format_decode 0.07% dd [kernel] [k] kref_put 0.07% perf [kernel] [k] generic_write_sync 0.07% perf [kernel] [k] xtLookup 0.07% perf [kernel] [k] ea_release 0.06% perf [kernel] [k] should_remove_suid 0.06% dd [kernel] [k] filemap_fault 0.06% dd [kernel] [k] anon_vma_prepare 0.06% dd [kernel] [k] mpage_alloc 0.06% perf [kernel] [k] sys_gettimeofday 0.06% perf [kernel] [k] __wake_up_bit 0.06% perf [kernel] [k] jfs_getxattr 0.06% perf [kernel] [k] find_lock_page 0.06% perf [kernel] [k] __set_page_dirty_buffers 0.06% dd [kernel] [k] up_read 0.06% dd [kernel] [k] free_page_and_swap_cache 0.05% perf [kernel] [k] __wake_up 0.05% perf [kernel] [k] current_fs_time 0.05% perf [kernel] [k] file_update_time 0.05% perf [kernel] [k] inotify_inode_queue_event 0.05% dd [kernel] [k] down_read_trylock 0.05% dd [kernel] [k] mempool_alloc 0.05% dd [kernel] [k] find_vma 0.05% dd [kernel] [k] kmem_cache_free 0.05% dd [kernel] [k] blk_rq_bio_prep 0.05% dd [kernel] [k] submit_bio 0.05% perf [kernel] [k] timespec_trunc 0.05% perf [kernel] [k] kfree 0.05% perf [kernel] [k] jfs_dirty_inode 0.05% perf [kernel] [k] strncmp 0.05% dd [kernel] [k] scsi_finish_command 0.05% dd [kernel] [k] preempt_schedule 0.04% perf [kernel] [k] do_gettimeofday 0.04% perf [kernel] [k] add_to_page_cache_locked 0.04% perf [kernel] [k] release_metapage 0.04% dd [kernel] [k] __do_fault 0.04% dd [kernel] [k] page_add_new_anon_rmap 0.04% dd [kernel] [k] blk_queue_bounce 0.04% dd [kernel] [k] init_request_from_bio 0.04% dd [kernel] [k] get_io_context 0.04% dd [kernel] [k] scsi_init_cmd_errh 0.04% perf [kernel] [k] fget_light 0.04% perf [kernel] [k] dbAllocBits 0.04% dd [kernel] [k] free_hot_page 0.04% dd [kernel] [k] ra_submit 0.04% dd [kernel] [k] vm_normal_page 0.04% dd [kernel] [k] bio_get_nr_vecs 0.04% dd [kernel] [k] bio_init 0.04% dd [kernel] [k] blk_done_softirq 0.04% perf [kernel] [k] current_kernel_time 0.04% perf [kernel] [k] inotify_dentry_parent_queue_event 0.04% perf [kernel] [k] xtExtend 0.04% perf [kernel] [k] extHint 0.04% perf [kernel] [k] strlen 0.04% perf [kernel] [k] do_page_fault 0.04% dd [kernel] [k] unlock_page 0.04% dd [kernel] [k] page_cache_async_readahead 0.04% dd [kernel] [k] down_read 0.03% perf [kernel] [k] perf_mmap_fault 0.03% perf [kernel] [k] mutex_unlock 0.03% perf /home/cloos/bin/perf [.] __cmd_record 0.03% dd [kernel] [k] generic_unplug_device 0.03% perf [kernel] [k] __rcu_read_lock 0.03% perf [kernel] [k] __do_fault 0.03% perf [kernel] [k] handle_mm_fault 0.03% perf [kernel] [k] kmem_cache_free 0.03% perf [kernel] [k] jfs_get_block 0.03% perf [kernel] [k] dbAllocDmap 0.03% perf [kernel] [k] cap_inode_need_killpriv 0.03% perf [kernel] [k] cap_file_permission 0.03% perf [kernel] [k] strchr 0.03% perf [kernel] [k] scsi_dispatch_cmd 0.03% perf [kernel] [k] mutex_lock 0.03% dd [kernel] [k] page_evictable 0.03% dd [kernel] [k] bio_fs_destructor 0.03% dd [kernel] [k] blk_unplug 0.03% dd [kernel] [k] get_request_wait 0.03% dd [kernel] [k] blk_recount_segments 0.03% dd [kernel] [k] __scsi_put_command 0.03% dd [kernel] [k] scsi_handle_queue_ramp_up 0.03% dd [kernel] [k] scsi_run_queue 0.02% perf [kernel] [k] do_read_cache_page 0.02% perf [kernel] [k] read_cache_page 0.02% perf [kernel] [k] ____pagevec_lru_add 0.02% perf [kernel] [k] dbAdjTree 0.02% perf [kernel] [k] dbAllocNext 0.02% perf [kernel] [k] _cond_resched 0.02% dd [kernel] [k] mempool_free 0.02% dd [kernel] [k] kobject_put 0.02% dd [kernel] [k] strnlen_user 0.02% dd [kernel] [k] sd_done 0.02% perf [kernel] [k] inode_add_bytes 0.02% perf [kernel] [k] mpage_end_io_read 0.02% perf [kernel] [k] __fsnotify_parent 0.02% perf [kernel] [k] txLock 0.02% perf [kernel] [k] down_read 0.02% perf [kernel] [k] ehci_watchdog [ehci_hcd] 0.02% dd [kernel] [k] put_pages_list 0.02% dd [kernel] [k] do_wp_page 0.02% dd [kernel] [k] bvec_alloc_bs 0.02% dd [kernel] [k] ext4_readpages 0.02% dd [kernel] [k] req_bio_endio 0.02% dd [kernel] [k] credit_entropy_bits 0.02% dd [kernel] [k] scsi_decide_disposition 0.02% dd [kernel] [k] scsi_softirq_done 0.02% dd /lib/ld-2.11.so [.] strcmp 0.02% perf [kernel] [k] up_read 0.02% perf [kernel] [k] up_write 0.02% perf [kernel] [k] rcu_sched_qs 0.02% perf [kernel] [k] perf_poll 0.02% perf [kernel] [k] zone_watermark_ok 0.02% perf [kernel] [k] __alloc_pages_nodemask 0.02% perf [kernel] [k] prepend 0.02% perf [kernel] [k] mnt_drop_write 0.02% perf [kernel] [k] mnt_clone_write 0.02% perf [kernel] [k] alloc_buffer_head 0.02% perf [kernel] [k] dbSplit 0.02% perf [kernel] [k] security_file_permission 0.02% dd [kernel] [k] __remove_shared_vm_struct 0.02% dd [kernel] [k] copy_strings 0.02% dd [kernel] [k] do_lookup 0.02% dd [kernel] [k] bio_phys_segments 0.02% dd [kernel] [k] mpage_bio_submit 0.02% dd [kernel] [k] blk_update_bidi_request 0.02% dd [kernel] [k] current_io_context 0.02% dd [kernel] [k] cfq_cic_lookup 0.02% dd [kernel] [k] add_timer_randomness 0.02% dd [kernel] [k] scsi_put_command 0.02% dd [kernel] [k] scsi_sg_free 0.02% dd [kernel] [k] scsi_device_unbusy 0.01% perf [kernel] [k] dup_mm 0.01% perf [kernel] [k] __do_softirq 0.01% perf [kernel] [k] down_read_trylock 0.01% perf [kernel] [k] read_cache_page_async 0.01% perf [kernel] [k] set_page_dirty 0.01% perf [kernel] [k] __set_page_dirty_nobuffers 0.01% perf [kernel] [k] do_wp_page 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] security_inode_need_killpriv 0.01% perf [kernel] [k] blk_end_bidi_request 0.01% perf [kernel] [k] ata_sff_interrupt 0.01% perf /lib/libc-2.11.so [.] __GI___gettimeofday_internal 0.01% dd [kernel] [k] run_timer_softirq 0.01% dd [kernel] [k] mempool_alloc_slab 0.01% dd [kernel] [k] mmap_region 0.01% dd [kernel] [k] page_remove_rmap 0.01% dd [kernel] [k] blk_run_queue 0.01% dd [kernel] [k] scsi_log_send 0.01% dd [kernel] [k] __scsi_release_buffers 0.01% dd [kernel] [k] scsi_io_completion 0.01% dd b7771cc4 [.] 0x000000b7771cc4 0.01% perf [kernel] [k] sysenter_do_call 0.01% perf [kernel] [k] timespec_add_safe 0.01% perf [kernel] [k] rcu_process_gp_end 0.01% perf [kernel] [k] wait_on_page_read 0.01% perf [kernel] [k] add_to_page_cache_lru 0.01% perf [kernel] [k] find_vma 0.01% perf [kernel] [k] __vma_link_rb 0.01% perf [kernel] [k] kmem_cache_alloc 0.01% perf [kernel] [k] __d_path 0.01% perf [kernel] [k] mnt_want_write_file 0.01% perf [kernel] [k] seq_printf 0.01% perf [kernel] [k] seq_read 0.01% perf [kernel] [k] bio_free 0.01% perf [kernel] [k] xtInsert 0.01% perf [kernel] [k] dbAllocCtl 0.01% perf [kernel] [k] cfq_idle_slice_timer 0.01% perf [kernel] [k] radix_tree_preload 0.01% perf [kernel] [k] credit_entropy_bits 0.01% perf [kernel] [k] mix_pool_bytes_extract 0.01% perf [kernel] [k] scsi_request_fn 0.01% perf /lib/libc-2.11.so [.] __libc_poll 0.01% dd [kernel] [k] sysenter_past_esp 0.01% dd [kernel] [k] test_ti_thread_flag 0.01% dd [kernel] [k] unshare_fd 0.01% dd [kernel] [k] up_write 0.01% dd [kernel] [k] rcu_process_gp_end 0.01% dd [kernel] [k] perf_output_copy 0.01% dd [kernel] [k] lru_cache_add_lru 0.01% dd [kernel] [k] vma_adjust 0.01% dd [kernel] [k] mprotect_fixup 0.01% dd [kernel] [k] path_get 0.01% dd [kernel] [k] __d_lookup 0.01% dd [kernel] [k] mntput_no_expire 0.01% dd [kernel] [k] bio_put 0.01% dd [kernel] [k] bio_free 0.01% dd [kernel] [k] load_elf_binary 0.01% dd [kernel] [k] elv_set_request 0.01% dd [kernel] [k] blk_end_request 0.01% dd [kernel] [k] kobject_get 0.01% dd [kernel] [k] kref_get 0.01% dd [kernel] [k] prio_tree_insert 0.01% dd [kernel] [k] rb_insert_color 0.01% dd [kernel] [k] _copy_from_user 0.01% dd [kernel] [k] __sg_free_table 0.01% dd [kernel] [k] do_output_char 0.01% dd [kernel] [k] put_device 0.01% dd [kernel] [k] scsi_log_completion 0.01% dd [kernel] [k] acpi_pm_read 0.01% dd [kernel] [k] error_code 0.01% dd /lib/libc-2.11.so [.] _dl_addr 0.01% dd /lib/ld-2.11.so [.] _dl_map_object_from_fd 0.01% dd /lib/ld-2.11.so [.] do_lookup_x 0.01% dd /lib/ld-2.11.so [.] ___fxstat64 0.01% dd /bin/dd [.] dd_copy 0.00% perf [kernel] [k] pte_alloc_one 0.00% perf [kernel] [k] get_gate_vma 0.00% perf [kernel] [k] lock_task_sighand 0.00% perf [kernel] [k] __queue_work 0.00% perf [kernel] [k] remove_wait_queue 0.00% perf [kernel] [k] __hrtimer_start_range_ns 0.00% perf [kernel] [k] hrtimer_peek_ahead_timers 0.00% perf [kernel] [k] hrtimer_cancel 0.00% perf [kernel] [k] filemap_fault 0.00% perf [kernel] [k] mempool_free 0.00% perf [kernel] [k] test_clear_page_writeback 0.00% perf [kernel] [k] __lru_cache_add 0.00% perf [kernel] [k] next_zones_zonelist 0.00% perf [kernel] [k] __vm_enough_memory 0.00% perf [kernel] [k] page_add_file_rmap 0.00% perf [kernel] [k] nameidata_to_filp 0.00% perf [kernel] [k] do_sys_open 0.00% perf [kernel] [k] generic_file_llseek 0.00% perf [kernel] [k] __d_instantiate 0.00% perf [kernel] [k] d_instantiate 0.00% perf [kernel] [k] d_path 0.00% perf [kernel] [k] free_buffer_head 0.00% perf [kernel] [k] alloc_page_buffers 0.00% perf [kernel] [k] xtSplitRoot 0.00% perf [kernel] [k] dbAllocDmapLev 0.00% perf [kernel] [k] txBeginAnon 0.00% perf [kernel] [k] security_vm_enough_memory_mm 0.00% perf [kernel] [k] blk_update_request 0.00% perf [kernel] [k] blk_run_queue 0.00% perf [kernel] [k] disk_map_sector_rcu 0.00% perf [kernel] [k] __rb_rotate_left 0.00% perf [kernel] [k] put_dec_trunc 0.00% perf [kernel] [k] bitmap_scnlistprintf 0.00% perf [kernel] [k] scsi_log_completion 0.00% perf [kernel] [k] __scsi_put_command 0.00% perf [kernel] [k] scsi_device_unbusy 0.00% perf [kernel] [k] scsi_softirq_done 0.00% perf [kernel] [k] down_write 0.00% perf /lib/libpthread-2.11.so [.] __libc_write 0.00% perf /lib/libpthread-2.11.so [.] __write_nocancel 0.00% perf /lib/libc-2.11.so [.] _IO_vfprintf_internal 0.00% perf /lib/ld-2.11.so [.] _dl_name_match_p 0.00% dd [kernel] [k] sysenter_do_call 0.00% dd [kernel] [k] sched_move_task 0.00% dd [kernel] [k] set_normalized_timespec 0.00% dd [kernel] [k] __queue_work 0.00% dd [kernel] [k] sys_clock_gettime 0.00% dd [kernel] [k] add_wait_queue 0.00% dd [kernel] [k] hrtimer_peek_ahead_timers 0.00% dd [kernel] [k] prepare_creds 0.00% dd [kernel] [k] module_put 0.00% dd [kernel] [k] __call_rcu 0.00% dd [kernel] [k] __rcu_process_callbacks 0.00% dd [kernel] [k] rcu_process_callbacks 0.00% dd [kernel] [k] perf_output_begin 0.00% dd [kernel] [k] __perf_event_mmap 0.00% dd [kernel] [k] mempool_free_slab 0.00% dd [kernel] [k] __free_pages 0.00% dd [kernel] [k] vma_prio_tree_remove 0.00% dd [kernel] [k] follow_page 0.00% dd [kernel] [k] vma_wants_writenotify 0.00% dd [kernel] [k] expand_downwards 0.00% dd [kernel] [k] __vm_enough_memory 0.00% dd [kernel] [k] unlink_file_vma 0.00% dd [kernel] [k] do_mmap_pgoff 0.00% dd [kernel] [k] page_add_file_rmap 0.00% dd [kernel] [k] anon_vma_unlink 0.00% dd [kernel] [k] do_sync_read 0.00% dd [kernel] [k] rw_verify_area 0.00% dd [kernel] [k] vfs_write 0.00% dd [kernel] [k] vfs_read 0.00% dd [kernel] [k] sys_write 0.00% dd [kernel] [k] fput 0.00% dd [kernel] [k] kernel_read 0.00% dd [kernel] [k] release_open_intent 0.00% dd [kernel] [k] path_put 0.00% dd [kernel] [k] link_path_walk 0.00% dd [kernel] [k] do_path_lookup 0.00% dd [kernel] [k] do_filp_open 0.00% dd [kernel] [k] __d_free 0.00% dd [kernel] [k] spin_unlock 0.00% dd [kernel] [k] touch_atime 0.00% dd [kernel] [k] block_sync_page 0.00% dd [kernel] [k] bio_endio 0.00% dd [kernel] [k] bio_alloc 0.00% dd [kernel] [k] fsnotify 0.00% dd [kernel] [k] inotify_inode_queue_event 0.00% dd [kernel] [k] locks_remove_flock 0.00% dd [kernel] [k] ext4_ext_drop_refs 0.00% dd [kernel] [k] ext4_ext_find_extent 0.00% dd [kernel] [k] security_file_permission 0.00% dd [kernel] [k] security_file_mmap 0.00% dd [kernel] [k] blk_backing_dev_unplug 0.00% dd [kernel] [k] disk_map_sector_rcu 0.00% dd [kernel] [k] cfq_idle_slice_timer 0.00% dd [kernel] [k] _atomic_dec_and_lock 0.00% dd [kernel] [k] radix_tree_next_hole 0.00% dd [kernel] [k] __rb_rotate_left 0.00% dd [kernel] [k] rb_erase 0.00% dd [kernel] [k] strrchr 0.00% dd [kernel] [k] half_md4_transform 0.00% dd [kernel] [k] write_null 0.00% dd [kernel] [k] add_disk_randomness 0.00% dd [kernel] [k] tty_flip_buffer_push 0.00% dd [kernel] [k] get_device 0.00% dd [kernel] [k] scsi_pool_free_command 0.00% dd [kernel] [k] scsi_next_command 0.00% dd /lib/libpthread-2.11.so [.] __pthread_rwlock_wrlock_internal 0.00% dd /lib/libc-2.11.so [.] __init_misc 0.00% dd /lib/ld-2.11.so [.] _dl_start 0.00% dd /lib/ld-2.11.so [.] version_check_doit 0.00% dd /lib/ld-2.11.so [.] _dl_cache_libcmp 0.00% dd /lib/ld-2.11.so [.] _dl_load_cache_lookup 0.00% dd /lib/ld-2.11.so [.] 0x0000000000bc59 0.00% dd /lib/ld-2.11.so [.] _dl_map_object_deps 0.00% dd /lib/ld-2.11.so [.] _dl_sysdep_start 0.00% dd /lib/ld-2.11.so [.] __mmap 0.00% dd /lib/ld-2.11.so [.] strlen # # (For a higher level overview, try: perf report --sort comm,dso) #