# Samples: 35051 # # Overhead Command Shared Object Symbol # ........ ....... ....................... ...... # 15.06% dd [kernel] [k] __copy_to_user_ll 13.82% dd [kernel] [k] __make_request 7.13% dd [kernel] [k] get_page_from_freelist 4.60% dd [kernel] [k] scsi_dispatch_cmd 4.44% dd [kernel] [k] block_read_full_page 3.46% dd [kernel] [k] generic_make_request 3.41% dd [kernel] [k] scsi_request_fn 2.50% dd [kernel] [k] kmem_cache_alloc 2.01% dd [kernel] [k] blkdev_get_block 1.66% dd [kernel] [k] get_request 1.63% dd [kernel] [k] generic_file_aio_read 1.63% dd [kernel] [k] __alloc_pages_nodemask 1.60% dd [kernel] [k] add_to_page_cache_locked 1.41% dd [kernel] [k] __do_page_cache_readahead 1.31% dd [kernel] [k] file_read_actor 1.17% dd [kernel] [k] submit_bh 1.03% dd [kernel] [k] blk_end_bidi_request 0.97% dd [kernel] [k] bio_alloc_bioset 0.88% dd [kernel] [k] __rcu_read_unlock 0.85% dd [kernel] [k] T.1339 0.84% perf [kernel] [k] generic_file_buffered_write 0.84% dd [kernel] [k] zone_watermark_ok 0.83% dd [kernel] [k] find_get_page 0.81% dd [kernel] [k] put_page 0.75% dd [kernel] [k] ata_sff_interrupt 0.72% dd [kernel] [k] ____pagevec_lru_add 0.72% dd [kernel] [k] alloc_page_buffers 0.63% dd [kernel] [k] submit_bio 0.63% dd [kernel] [k] schedule 0.63% dd [kernel] [k] blk_queue_bounce 0.57% dd [kernel] [k] create_empty_buffers 0.54% perf [kernel] [k] __generic_file_aio_write 0.53% dd [kernel] [k] __lru_cache_add 0.53% dd [kernel] [k] alloc_buffer_head 0.53% dd [kernel] [k] next_zones_zonelist 0.49% dd [kernel] [k] mempool_alloc 0.48% dd [kernel] [k] add_to_page_cache_lru 0.39% dd [kernel] [k] bio_init 0.39% dd [kernel] [k] handle_IRQ_event 0.35% dd [kernel] [k] radix_tree_preload 0.34% dd [kernel] [k] radix_tree_lookup 0.31% perf [kernel] [k] generic_file_aio_write 0.31% perf [kernel] [k] nobh_write_end 0.30% dd [kernel] [k] __rcu_read_lock 0.30% dd [kernel] [k] __do_softirq 0.29% dd [kernel] [k] radix_tree_lookup_slot 0.28% perf [kernel] [k] iov_iter_advance 0.28% dd [kernel] [k] __blk_recalc_rq_segments 0.28% dd [kernel] [k] cfq_set_request 0.26% perf [kernel] [k] __jfs_getxattr 0.26% perf [kernel] [k] iov_iter_copy_from_user_atomic 0.25% perf [kernel] [k] getnstimeofday 0.25% perf [kernel] [k] nobh_write_begin 0.25% dd [kernel] [k] do_page_fault 0.24% perf [kernel] [k] sysenter_past_esp 0.24% perf [kernel] [k] do_sync_write 0.23% dd [kernel] [k] rcu_sched_qs 0.23% dd [kernel] [k] bio_put 0.22% dd [kernel] [k] unmap_vmas 0.22% dd [kernel] [k] _cond_resched 0.22% perf [kernel] [k] vfs_write 0.22% dd [kernel] [k] mempool_alloc_slab 0.21% dd [kernel] [k] mark_page_accessed 0.20% dd [kernel] [k] req_bio_endio 0.19% perf [kernel] [k] sys_write 0.19% dd [kernel] [k] blk_rq_init 0.19% perf [kernel] [k] rw_verify_area 0.19% perf [kernel] [k] acpi_pm_read 0.19% perf [kernel] [k] find_get_page 0.19% dd [kernel] [k] blk_update_request 0.17% perf [kernel] [k] generic_segment_checks 0.17% dd [kernel] [k] preempt_schedule 0.17% perf [kernel] [k] __copy_from_user_ll_nozero 0.17% perf [kernel] [k] jfs_write_begin 0.17% dd [kernel] [k] free_hot_cold_page 0.17% dd [kernel] [k] bio_alloc 0.16% perf [kernel] [k] copy_to_user 0.15% dd [kernel] [k] blkdev_readpage 0.15% dd [kernel] [k] set_bh_page 0.15% dd [kernel] [k] ehci_watchdog [ehci_hcd] 0.14% perf [kernel] [k] T.1339 0.14% perf [kernel] [k] sys_gettimeofday 0.14% perf [kernel] [k] ea_get 0.13% dd [kernel] [k] handle_mm_fault 0.12% dd [kernel] [k] get_io_context 0.11% perf [kernel] [k] fget_light 0.11% perf [kernel] [k] grab_cache_page_write_begin 0.11% perf [kernel] [k] balance_dirty_pages_ratelimited_nr 0.11% perf [kernel] [k] iov_iter_fault_in_readable 0.11% perf [kernel] [k] __set_page_dirty_buffers 0.10% perf [kernel] [k] __mark_inode_dirty 0.10% perf [kernel] [k] fsnotify 0.10% perf [kernel] [k] jfs_getxattr 0.10% perf [kernel] [k] vsnprintf 0.10% dd [kernel] [k] end_buffer_async_read 0.10% perf [kernel] [k] inotify_dentry_parent_queue_event 0.09% perf [kernel] [k] put_page 0.09% perf [kernel] [k] kfree 0.09% dd [kernel] [k] mix_pool_bytes_extract 0.09% perf [vdso] [.] 0x000000ffffe424 0.09% perf [kernel] [k] inotify_inode_queue_event 0.09% perf [kernel] [k] number 0.09% perf [kernel] [k] scsi_dispatch_cmd 0.09% dd [kernel] [k] init_request_from_bio 0.09% dd [kernel] [k] scsi_init_cmd_errh 0.08% perf [kernel] [k] schedule 0.08% dd [kernel] [k] kmem_cache_free 0.08% perf [kernel] [k] should_remove_suid 0.08% dd [kernel] [k] blk_rq_bio_prep 0.07% dd [kernel] [k] do_mpage_readpage 0.07% perf [kernel] [k] unlock_page 0.07% perf [kernel] [k] find_lock_page 0.07% perf [kernel] [k] __rcu_read_unlock 0.07% perf [kernel] [k] generic_write_sync 0.07% perf [kernel] [k] dbAlloc 0.07% perf [kernel] [k] extAlloc 0.07% perf [kernel] [k] file_update_time 0.07% perf [kernel] [k] radix_tree_lookup_slot 0.07% dd [kernel] [k] current_io_context 0.06% perf [kernel] [k] do_gettimeofday 0.06% perf [kernel] [k] xtSearch 0.06% perf /home/cloos/bin/perf [.] __cmd_record 0.06% dd [kernel] [k] get_pageblock_flags_group 0.06% dd [kernel] [k] bio_endio 0.06% perf [kernel] [k] file_remove_suid 0.06% perf [kernel] [k] mark_page_accessed 0.06% perf [kernel] [k] __set_page_dirty 0.06% perf [kernel] [k] cap_inode_need_killpriv 0.06% perf [kernel] [k] format_decode 0.06% dd [kernel] [k] release_pages 0.06% dd [kernel] [k] cfq_cic_lookup 0.06% dd [kernel] [k] mdio_ctrl_hw 0.05% dd [kernel] [k] kref_put 0.05% perf [kernel] [k] ea_release 0.05% dd [kernel] [k] __do_fault 0.05% dd [kernel] [k] blk_recount_segments 0.05% perf [kernel] [k] jfs_dirty_inode 0.05% perf [kernel] [k] xtLookup 0.05% perf [kernel] [k] dbAllocBits 0.05% perf [kernel] [k] mutex_lock 0.05% perf [kernel] [k] __wake_up_bit 0.05% perf [kernel] [k] current_kernel_time 0.04% perf [kernel] [k] current_fs_time 0.04% perf [kernel] [k] copy_page_range 0.04% perf [kernel] [k] strncmp 0.04% dd [kernel] [k] hrtimer_peek_ahead_timers 0.04% perf [kernel] [k] dbAllocNext 0.04% dd [kernel] [k] vm_normal_page 0.04% dd [kernel] [k] get_request_wait 0.04% perf [kernel] [k] get_page_from_freelist 0.04% perf [kernel] [k] __fsnotify_parent 0.04% perf [kernel] [k] strlen 0.04% perf [kernel] [k] _cond_resched 0.04% dd [kernel] [k] __wake_up 0.04% dd [kernel] [k] ondemand_readahead 0.04% dd [kernel] [k] bio_phys_segments 0.04% dd [kernel] [k] bio_fs_destructor 0.04% dd [kernel] [k] cfq_idle_slice_timer 0.03% perf [kernel] [k] security_inode_need_killpriv 0.03% perf [kernel] [k] scsi_request_fn 0.03% dd [kernel] [k] end_bio_bh_io_sync 0.03% perf [kernel] [k] __wake_up 0.03% perf [kernel] [k] timespec_trunc 0.03% perf [kernel] [k] set_page_dirty 0.03% perf [kernel] [k] kmem_cache_alloc 0.03% perf [kernel] [k] extHint 0.03% perf [kernel] [k] cap_file_permission 0.03% dd [kernel] [k] __queue_work 0.03% dd [kernel] [k] down_read_trylock 0.03% dd [kernel] [k] filemap_fault 0.03% dd [kernel] [k] page_cache_async_readahead 0.03% dd [kernel] [k] xtSearch 0.03% dd [kernel] [k] sha_transform 0.03% perf [kernel] [k] down_read 0.03% perf [kernel] [k] do_page_fault 0.03% dd [kernel] [k] unlock_page 0.03% dd [kernel] [k] free_hot_page 0.03% dd [kernel] [k] find_vma 0.03% dd [kernel] [k] generic_unplug_device 0.03% dd [kernel] [k] blk_done_softirq 0.03% dd [kernel] [k] scsi_finish_command 0.03% dd [kernel] [k] scsi_put_command 0.03% perf [kernel] [k] mutex_unlock 0.03% dd [kernel] [k] elv_set_request 0.02% perf [kernel] [k] sysenter_do_call 0.02% perf [kernel] [k] __rcu_read_lock 0.02% perf [kernel] [k] xtExtend 0.02% dd [kernel] [k] test_clear_page_writeback 0.02% dd [kernel] [k] blk_run_queue 0.02% dd [kernel] [k] __scsi_put_command 0.02% dd [kernel] [k] scsi_decide_disposition 0.02% dd [kernel] [k] scsi_run_queue 0.02% perf [kernel] [k] up_read 0.02% perf [kernel] [k] __alloc_pages_nodemask 0.02% perf [kernel] [k] __do_fault 0.02% perf [kernel] [k] jfs_get_block 0.02% perf [kernel] [k] security_file_permission 0.02% perf [kernel] [k] blk_end_bidi_request 0.02% dd [kernel] [k] __wake_up_bit 0.02% dd [kernel] [k] page_add_new_anon_rmap 0.02% perf [kernel] [k] handle_IRQ_event 0.02% perf [kernel] [k] handle_mm_fault 0.02% perf [kernel] [k] kmem_cache_free 0.02% perf [kernel] [k] mnt_clone_write 0.02% perf [kernel] [k] seq_printf 0.02% perf [kernel] [k] spin_unlock 0.02% perf [kernel] [k] txLock 0.02% perf [kernel] [k] strchr 0.02% perf [kernel] [k] ehci_watchdog [ehci_hcd] 0.02% dd [kernel] [k] up_read 0.02% dd [kernel] [k] rcu_process_gp_end 0.02% dd [kernel] [k] mempool_free 0.02% dd [kernel] [k] ra_submit 0.02% dd [kernel] [k] page_remove_rmap 0.02% dd [kernel] [k] anon_vma_prepare 0.02% dd [kernel] [k] __bio_add_page 0.02% dd [kernel] [k] bio_free 0.02% dd [kernel] [k] kobject_put 0.02% dd [kernel] [k] scsi_device_unbusy 0.02% dd [kernel] [k] scsi_io_completion 0.02% dd [kernel] [k] sd_done 0.01% perf [kernel] [k] rcu_sched_qs 0.01% perf [kernel] [k] do_sys_poll 0.01% perf [kernel] [k] free_buffer_head 0.01% perf [kernel] [k] __find_get_block_slow 0.01% perf [kernel] [k] dbSplit 0.01% perf /lib/libc-2.11.so [.] __GI___gettimeofday_internal 0.01% dd [kernel] [k] run_timer_softirq 0.01% dd [kernel] [k] page_evictable 0.01% dd [kernel] [k] free_page_and_swap_cache 0.01% dd [kernel] [k] kmem_cache_alloc_notrace 0.01% dd [kernel] [k] end_buffer_async_write 0.01% dd [kernel] [k] bio_add_page 0.01% dd [kernel] [k] blk_unplug 0.01% dd [kernel] [k] blk_update_bidi_request 0.01% dd [kernel] [k] put_device 0.01% dd [kernel] [k] __scsi_release_buffers 0.01% perf [kernel] [k] __hrtimer_start_range_ns 0.01% perf [kernel] [k] add_to_page_cache_lru 0.01% perf [kernel] [k] ____pagevec_lru_add 0.01% perf [kernel] [k] mnt_drop_write 0.01% perf [kernel] [k] ata_sff_interrupt 0.01% dd [kernel] [k] lru_cache_add_lru 0.01% dd [kernel] [k] mmap_region 0.01% dd [kernel] [k] mpage_readpages 0.01% dd [kernel] [k] __sg_free_table 0.01% dd [kernel] [k] add_timer_randomness 0.01% dd [kernel] [k] scsi_softirq_done 0.01% dd b713846f [.] 0x000000b713846f 0.01% perf [kernel] [k] up_write 0.01% perf [kernel] [k] add_to_page_cache_locked 0.01% perf [kernel] [k] read_cache_page 0.01% perf [kernel] [k] vm_normal_page 0.01% perf [kernel] [k] do_wp_page 0.01% perf [kernel] [k] anon_vma_link 0.01% perf [kernel] [k] prepend 0.01% perf [kernel] [k] d_path 0.01% perf [kernel] [k] mangle_path 0.01% perf [kernel] [k] show_map_vma 0.01% perf [kernel] [k] dbAllocDmap 0.01% perf [kernel] [k] __get_metapage 0.01% dd [kernel] [k] try_to_wake_up 0.01% dd [kernel] [k] __rcu_process_callbacks 0.01% dd [kernel] [k] __lock_page_killable 0.01% dd [kernel] [k] mempool_free_slab 0.01% dd [kernel] [k] shrink_page_list 0.01% dd [kernel] [k] unlink_file_vma 0.01% dd [kernel] [k] page_referenced 0.01% dd [kernel] [k] jfs_get_block 0.01% dd [kernel] [k] dtSearch 0.01% dd [kernel] [k] metapage_readpage 0.01% dd [kernel] [k] cap_file_permission 0.01% dd [kernel] [k] blk_backing_dev_unplug 0.01% dd [kernel] [k] disk_map_sector_rcu 0.01% dd [kernel] [k] kobject_get 0.01% dd [kernel] [k] strnlen_user 0.01% dd [kernel] [k] copy_to_user 0.01% dd [kernel] [k] credit_entropy_bits 0.01% dd [kernel] [k] scsi_log_send 0.01% dd [kernel] [k] scsi_pool_free_command 0.01% dd [kernel] [k] scsi_sg_free 0.01% dd [kernel] [k] preempt_schedule_irq 0.01% perf [kernel] [k] pgd_alloc 0.01% perf [kernel] [k] copy_process 0.01% perf [kernel] [k] __do_softirq 0.01% perf [kernel] [k] ktime_get_ts 0.01% perf [kernel] [k] perf_poll 0.01% perf [kernel] [k] perf_mmap_fault 0.01% perf [kernel] [k] do_read_cache_page 0.01% perf [kernel] [k] read_cache_page_async 0.01% perf [kernel] [k] activate_page 0.01% perf [kernel] [k] vma_prio_tree_add 0.01% perf [kernel] [k] next_zones_zonelist 0.01% perf [kernel] [k] find_vma 0.01% perf [kernel] [k] __d_path 0.01% perf [kernel] [k] alloc_page_buffers 0.01% perf [kernel] [k] bio_endio 0.01% perf [kernel] [k] dbAdjTree 0.01% perf [kernel] [k] txBeginAnon 0.01% perf [kernel] [k] blk_update_request 0.01% perf [kernel] [k] blk_done_softirq 0.01% perf [kernel] [k] cfq_idle_slice_timer 0.01% perf [kernel] [k] radix_tree_preload 0.01% perf [kernel] [k] string 0.01% perf [kernel] [k] preempt_schedule 0.01% perf [kernel] [k] schedule_hrtimeout_range 0.01% perf [kernel] [k] down_write 0.01% perf /lib/libpthread-2.11.so [.] __libc_write 0.01% dd [kernel] [k] sysenter_past_esp 0.01% dd [kernel] [k] queue_work 0.01% dd [kernel] [k] prepare_to_wait_exclusive 0.01% dd [kernel] [k] ktime_get_ts 0.01% dd [kernel] [k] __call_rcu 0.01% dd [kernel] [k] rcu_process_callbacks 0.01% dd [kernel] [k] shrink_inactive_list 0.01% dd [kernel] [k] remove_vma 0.01% dd [kernel] [k] do_sync_read 0.01% dd [kernel] [k] rw_verify_area 0.01% dd [kernel] [k] file_free_rcu 0.01% dd [kernel] [k] __follow_mount 0.01% dd [kernel] [k] do_lookup 0.01% dd [kernel] [k] link_path_walk 0.01% dd [kernel] [k] load_elf_binary 0.01% dd [kernel] [k] prio_tree_next 0.01% dd [kernel] [k] scsi_handle_queue_ramp_up 0.01% dd /lib/ld-2.11.so [.] _dl_setup_hash 0.00% perf [kernel] [k] task_nice 0.00% perf [kernel] [k] wake_up_new_task 0.00% perf [kernel] [k] dup_mm 0.00% perf [kernel] [k] free_uid 0.00% perf [kernel] [k] find_task_by_pid_ns 0.00% perf [kernel] [k] remove_wait_queue 0.00% perf [kernel] [k] __rcu_process_callbacks 0.00% perf [kernel] [k] __lru_cache_add 0.00% perf [kernel] [k] arch_get_unmapped_area_topdown 0.00% perf [kernel] [k] inode_add_bytes 0.00% perf [kernel] [k] path_init 0.00% perf [kernel] [k] do_lookup 0.00% perf [kernel] [k] poll_schedule_timeout 0.00% perf [kernel] [k] __d_free 0.00% perf [kernel] [k] mnt_want_write_file 0.00% perf [kernel] [k] set_bh_page 0.00% perf [kernel] [k] alloc_buffer_head 0.00% perf [kernel] [k] end_buffer_async_read 0.00% perf [kernel] [k] end_buffer_async_write 0.00% perf [kernel] [k] unmap_underlying_metadata 0.00% perf [kernel] [k] m_start 0.00% perf [kernel] [k] proc_pid_status 0.00% perf [kernel] [k] release_metapage 0.00% perf [kernel] [k] req_bio_endio 0.00% perf [kernel] [k] __blk_recalc_rq_segments 0.00% perf [kernel] [k] _atomic_dec_and_lock 0.00% perf [kernel] [k] rb_insert_color 0.00% perf [kernel] [k] put_dec_trunc 0.00% perf [kernel] [k] put_dec 0.00% perf [kernel] [k] strncpy 0.00% perf [kernel] [k] credit_entropy_bits 0.00% perf [kernel] [k] scsi_decide_disposition 0.00% perf [kernel] [k] scsi_softirq_done 0.00% perf /lib/libc-2.11.so [.] _IO_getline_internal 0.00% perf /lib/ld-2.11.so [.] check_match.8476 0.00% perf /lib/ld-2.11.so [.] do_lookup_x 0.00% perf /home/cloos/bin/perf [.] pid_synthesize_mmap_samples 0.00% dd [kernel] [k] destroy_context 0.00% dd [kernel] [k] ___pte_free_tlb 0.00% dd [kernel] [k] set_normalized_timespec 0.00% dd [kernel] [k] prepare_exec_creds 0.00% dd [kernel] [k] do_futex 0.00% dd [kernel] [k] rcu_bh_qs 0.00% dd [kernel] [k] check_for_new_grace_period 0.00% dd [kernel] [k] generic_segment_checks 0.00% dd [kernel] [k] sync_page 0.00% dd [kernel] [k] do_read_cache_page 0.00% dd [kernel] [k] read_cache_page_async 0.00% dd [kernel] [k] wakeup_kswapd 0.00% dd [kernel] [k] vma_prio_tree_remove 0.00% dd [kernel] [k] free_pgd_range 0.00% dd [kernel] [k] follow_page 0.00% dd [kernel] [k] do_wp_page 0.00% dd [kernel] [k] find_mergeable_anon_vma 0.00% dd [kernel] [k] insert_vm_struct 0.00% dd [kernel] [k] vma_adjust 0.00% dd [kernel] [k] do_mmap_pgoff 0.00% dd [kernel] [k] sys_mmap_pgoff 0.00% dd [kernel] [k] page_add_file_rmap 0.00% dd [kernel] [k] kfree 0.00% dd [kernel] [k] __kmalloc 0.00% dd [kernel] [k] do_sys_open 0.00% dd [kernel] [k] vfs_read 0.00% dd [kernel] [k] sys_read 0.00% dd [kernel] [k] fget 0.00% dd [kernel] [k] __fput 0.00% dd [kernel] [k] copy_strings 0.00% dd [kernel] [k] kernel_read 0.00% dd [kernel] [k] check_unsafe_exec 0.00% dd [kernel] [k] getname 0.00% dd [kernel] [k] do_follow_link 0.00% dd [kernel] [k] do_filp_open 0.00% dd [kernel] [k] prepend 0.00% dd [kernel] [k] d_rehash 0.00% dd [kernel] [k] __d_lookup 0.00% dd [kernel] [k] dput 0.00% dd [kernel] [k] alloc_fd 0.00% dd [kernel] [k] mntput_no_expire 0.00% dd [kernel] [k] block_sync_page 0.00% dd [kernel] [k] bd_acquire 0.00% dd [kernel] [k] mpage_end_io_read 0.00% dd [kernel] [k] locks_remove_flock 0.00% dd [kernel] [k] __get_metapage 0.00% dd [kernel] [k] security_inode_permission 0.00% dd [kernel] [k] security_vm_enough_memory 0.00% dd [kernel] [k] blk_end_request 0.00% dd [kernel] [k] prio_tree_replace 0.00% dd [kernel] [k] __rb_rotate_left 0.00% dd [kernel] [k] rb_insert_color 0.00% dd [kernel] [k] strrchr 0.00% dd [kernel] [k] __get_user_4 0.00% dd [kernel] [k] strlen 0.00% dd [kernel] [k] _copy_from_user 0.00% dd [kernel] [k] half_md4_transform 0.00% dd [kernel] [k] ioread8 0.00% dd [kernel] [k] write_null 0.00% dd [kernel] [k] account 0.00% dd [kernel] [k] get_device 0.00% dd [kernel] [k] scsi_next_command 0.00% dd [kernel] [k] e100_exec_cmd 0.00% dd [kernel] [k] acpi_pm_read 0.00% dd [kernel] [k] __wait_on_bit_lock 0.00% dd [kernel] [k] down_read 0.00% dd [kernel] [k] syscall_call 0.00% dd [kernel] [k] error_code 0.00% dd /lib/libc-2.11.so [.] 0x00000000021f5e 0.00% dd /lib/libc-2.11.so [.] _nl_load_locale_from_archive 0.00% dd /lib/libc-2.11.so [.] _IO_vfprintf_internal 0.00% dd /lib/libc-2.11.so [.] buffered_vfprintf 0.00% dd /lib/libc-2.11.so [.] _int_malloc 0.00% dd /lib/libc-2.11.so [.] index 0.00% dd /lib/libc-2.11.so [.] __GI_strstr 0.00% dd /lib/libc-2.11.so [.] __GI___libc_write 0.00% dd /lib/libc-2.11.so [.] __GI___register_atfork 0.00% dd /lib/libc-2.11.so [.] _dl_addr 0.00% dd /lib/ld-2.11.so [.] _dl_relocate_object 0.00% dd /lib/ld-2.11.so [.] call_init 0.00% dd /lib/ld-2.11.so [.] _dl_check_map_versions 0.00% dd /lib/ld-2.11.so [.] _dl_discover_osversion 0.00% dd /lib/ld-2.11.so [.] __mmap 0.00% dd /lib/ld-2.11.so [.] strcmp # # (For a higher level overview, try: perf report --sort comm,dso) #