研究性能测试工具之systemtap入门之latencytap脚本应用（三）

Latencytap.stp脚本支持多少种的延迟原因

$ cat /usr/share/latencytop/latencytop.trans

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1 vfs_read Reading from file

1 vfs_write Writing to file

1 __mark_inode_dirty Marking inode dirty

1 vfs_readdir Reading directory content

1 vfs_unlink Unlinking file

1 blocking_notifier_call_chain Blocking notifier

1 lock_super Superblock lock contention

1 vfs_create Creating a file

1 KAS_ScheduleTimeout Binary AMD driver delay

1 firegl_lock_device Binary AMD driver delay

#

2 __bread Synchronous buffer read

2 do_generic_mapping_read Reading file data

2 sock_sendmsg Sending data over socket

2 do_sys_open Opening file

2 do_sys_poll Waiting for event (poll)

2 core_sys_select Waiting for event (select)

2 proc_reg_read Reading from /proc file

2 __pollwait Waiting for event (poll)

2 sys_fcntl FCNTL system call

2 scsi_error_handler SCSI error handler

2 proc_root_readdir Reading /proc directory

2 ksoftirqd Waking ksoftirqd

2 worker_thread .

2 do_unlinkat Unlinking file

2 __wait_on_buffer Waiting for buffer IO to complete

2 pdflush pdflush() kernel thread

2 kjournald kjournald() kernel thread

2 blkdev_ioctl block device IOCTL

2 kauditd_thread kernel audit daemon

2 tty_ioctl TTY IOCTL

2 __filemap_fdatawrite_range fdatasync system call

2 do_sync_write synchronous write

2 kthreadd kthreadd kernel thread

2 usb_port_resume Waking up USB device

2 usb_autoresume_device Waking up USB device

2 kswapd kswapd() kernel thread

2 md_thread Raid resync kernel thread

2 i915_wait_request Waiting for GPU command to complete

2 request_module Loading a kernel module

#

3 tty_wait_until_sent Waiting for TTY to finish sending

3 pipe_read Reading from a pipe

3 pipe_write Writing to a pipe

3 pipe_wait Waiting for pipe data

3 read_block_bitmap Reading EXT3 block bitmaps

3 scsi_execute_req Executing raw SCSI command

3 sys_wait4 Waiting for a process to die

3 sr_media_change Checking for media change

3 sr_do_ioctl SCSI cdrom ioctl

3 sd_ioctl SCSI disk ioctl

3 sr_cd_check Checking CDROM media present

3 ext3_read_inode Reading EXT3 inode

3 htree_dirblock_to_tree Reading EXT3 directory htree

3 ext3_readdir Reading EXT3 directory

3 ext3_bread Synchronous EXT3 read

3 ext3_free_branches Unlinking file on EXT3

3 ext3_get_branch Reading EXT3 indirect blocks

3 ext3_find_entry EXT3: Looking for file

3 __ext3_get_inode_loc Reading EXT3 inode

3 ext3_delete_inode EXT3 deleting inode

3 sync_page Writing a page to disk

3 tty_poll Waiting for TTY data

3 tty_read Waiting for TTY input

3 tty_write Writing data to TTY

3 update_atime Updating inode atime

3 page_cache_sync_readahead Pagecache sync readahead

3 do_fork Fork() system call

3 sys_mkdirat Creating directory

3 lookup_create Creating file

3 inet_sendmsg Sending TCP/IP data

3 tcp_recvmsg Receiving TCP/IP data

3 link_path_walk Following symlink

3 path_walk Walking directory tree

3 sys_getdents Reading directory content

3 unix_stream_recvmsg Waiting for data on unix socket

3 ext3_mkdir EXT3: Creating a directory

3 journal_get_write_access EXT3: Waiting for journal access

3 synchronize_rcu Waiting for RCU

3 input_close_device Closing input device

3 mousedev_close_device Closing mouse device

3 mousedev_release Closing mouse device

3 mousedev_open Opening mouse device

3 kmsg_read Reading from dmesg

3 sys_futex Userspace lock contention

3 do_futex Userspace lock contention

3 vt_waitactive vt_waitactive IOCTL

3 acquire_console_sem Waiting for console access

3 filp_close Closing a file

3 sync_inode (f)syncing an inode to disk

3 ata_exec_internal_sg Executing internal ATA command

3 writeback_inodes Writing back inodes

3 ext3_orphan_add EXT3 adding orphan

3 ext3_mark_inode_dirty EXT3 marking inode dirty

3 ext3_unlink EXT3 unlinking file

3 ext3_create EXT3 Creating a file

3 log_do_checkpoint EXT3 journal checkpoint

3 generic_delete_inode Deleting an inode

3 proc_delete_inode Removing /proc file

3 do_truncate Truncating file

3 sys_execve Executing a program

3 journal_commit_transaction EXT3: committing transaction

3 __stop_machine_run Freezing the kernel (for module load)

3 sys_munmap unmapping memory

3 sys_mmap mmaping memory

3 sync_buffer Writing buffer to disk (synchronous)

3 inotify_inode_queue_event Inotify event

3 proc_lookup Looking up /proc file

3 generic_make_request Creating block layer request

3 get_request_wait Creating block layer request

3 alloc_page_vma Allocating a VMA

#3 __d_lookup Looking up a dentry

3 blkdev_direct_IO Direct block device IO

3 sys_mprotect mprotect() system call

3 shrink_icache_memory reducing inode cache memory footprint

3 vfs_stat_fd stat() operation

3 cdrom_open opening cdrom device

3 sys_epoll_wait Waiting for event (epoll)

3 sync_sb_inodes Syncing inodes

3 tcp_connect TCP/IP connect

3 ata_scsi_ioctl ATA/SCSI disk ioctl

3 do_rmdir Removing directory

3 vfs_rmdir Removing directory

3 sys_flock flock() on a file

3 usbdev_open opening USB device

3 lock_kernel Big Kernel Lock contention

3 blk_execute_rq Submitting block IO

3 scsi_cmd_ioctl SCSI ioctl command

3 acpi_ec_transaction ACPI hardware access

3 journal_get_undo_access Waiting for EXT3 journal undo operation

3 i915_irq_wait Waiting for GPU interrupt

3 i915_gem_throttle_ioctl Throttling GPU while waiting for commands

#

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5 do_page_fault Page fault

5 handle_mm_fault Page fault

5 filemap_fault Page fault

5 sync_filesystems Syncing filesystem

5 sys_nanosleep Application requested delay

5 sys_pause Application requested delay

5 evdev_read Reading keyboard/mouse input

5 do_fsync fsync() on a file (type ‘F’ for details)

5 __log_wait_for_space Waiting for EXT3 journal space