taskq_dispatch by tq_name

gistfile1.txt

# /apps/perf-tools/bin/kprobe -s 'p:taskq_dispatch +0(+16(%di)):string' | head -20
taskq_dispatch [spl]
Tracing kprobe taskq_dispatch. Ctrl-C to end.
           <...>-68258 [007] d... 1242008.371281: taskq_dispatch: (taskq_dispatch+0x0/0x170 [spl]) arg1="metaslab_group_taskq"
           <...>-68258 [007] d... 1242008.371289: <stack trace>
 => vdev_sync_done
 => spa_sync
 => txg_sync_thread
 => thread_generic_wrapper
 => kthread
 => ret_from_fork
           <...>-68258 [007] d... 1242008.371295: taskq_dispatch: (taskq_dispatch+0x0/0x170 [spl]) arg1="metaslab_group_taskq"
           <...>-68258 [007] d... 1242008.371297: <stack trace>
 => vdev_sync_done
 => spa_sync
 => txg_sync_thread
 => thread_generic_wrapper
 => kthread
 => ret_from_fork
           <...>-68258 [007] d... 1242008.371303: taskq_dispatch: (taskq_dispatch+0x0/0x170 [spl]) arg1="metaslab_group_taskq"
           <...>-68258 [007] d... 1242008.371305: <stack trace>


...

# /apps/perf-tools/bin/kprobe -s 'p:taskq_dispatch +0(+16(%di)):string' | head -20
taskq_dispatch [spl]
Tracing kprobe taskq_dispatch. Ctrl-C to end.
             zfs-18477 [003] d... 1156000.179000: taskq_dispatch: (taskq_dispatch+0x0/0x170 [spl]) arg1=""
             zfs-18477 [003] d... 1156000.179014: <stack trace>
 => dump_bytes
 => backup_cb
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_dnode
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp
 => traverse_visitbp