On Wed, 2014-07-30 at 07:23 -0700, Paul E. McKenney wrote:
> So the delta accounting is much of the pain. Hmmm...
(overhead picture was incomplete, just fixing that...)
executive summary:
nohz_full=NA cpu=3 604.2 KHz 1.000
nohz_full=3, cpu=3 303.5 KHz .502
nohz_full=3, cpu=2 460.4 KHz .761
boring details:
nohz_full=NA, pipe-test cpu=3 nohz_full=3, pipe-test cpu=3
nohz_full=3, pipe-test cpu=2
10.45% __schedule 8.74% native_sched_clock
9.22% __schedule
10.03% system_call 5.63% __schedule
5.29% system_call
4.86% _raw_spin_lock_irqsave 4.75% _raw_spin_lock
4.79% context_tracking_user_exit
4.51% __switch_to 4.35% reschedule_interrupt
3.81% _raw_spin_lock_irqsave
4.31% copy_user_generic_string 3.91% _raw_spin_unlock_irqrestore
3.57% __switch_to
3.50% pipe_read 3.35% system_call
3.45% copy_user_generic_string
3.02% pipe_write 2.73% context_tracking_user_exit
2.90% context_tracking_user_enter
2.76% mutex_lock 2.30% _raw_spin_lock_irqsave
2.86% pipe_read
2.30% native_sched_clock 2.08% context_tracking_user_enter
2.33% mutex_lock
2.27% copy_page_to_iter_iovec 1.94% __switch_to
2.14% pipe_write
2.16% mutex_unlock 1.88% copy_user_generic_string
1.89% copy_page_to_iter_iovec
2.15% _raw_spin_unlock_irqrestore 1.80% account_system_time
1.88% tracesys
1.86% copy_page_from_iter_iovec 1.77%
rcu_eqs_enter_common.isra.42 1.78% native_sched_clock
1.85% vfs_write 1.60% pipe_read
1.70% mutex_unlock
1.67% new_sync_read 1.58% pipe_write
1.68% _raw_spin_unlock_irqrestore
1.61% new_sync_write 1.39% mutex_lock
1.67% int_check_syscall_exit_work
1.49% vfs_read 1.37% enqueue_task_fair
1.54% __context_tracking_task_switch
1.47% fsnotify 1.25% rcu_eqs_exit_common.isra.43
1.39% copy_page_from_iter_iovec
1.43% __fget_light 1.14% get_vtime_delta
1.38% new_sync_read
1.36% enqueue_task_fair 1.11% flat_send_IPI_mask
1.38% __tick_nohz_task_switch
1.28% finish_task_switch 1.07% tracesys
1.37% syscall_trace_leave
1.26% dequeue_task_fair 1.03% dequeue_task_fair
1.35% vfs_write
1.25% __sb_start_write 1.01% copy_page_to_iter_iovec
1.34% new_sync_write
1.22% _raw_spin_lock_irq 1.01% int_check_syscall_exit_work
1.31% int_ret_from_sys_call
1.20% try_to_wake_up 0.97% vfs_write
1.30% enqueue_task_fair
1.16% update_curr 0.94%
__context_tracking_task_switch 1.23% fsnotify
1.05% __fsnotify_parent 0.93% mutex_unlock
1.22% finish_task_switch
1.03% pick_next_task_fair 0.88% copy_page_from_iter_iovec
1.14% vfs_read
1.02% sys_write 0.87% new_sync_write
1.12% _raw_spin_lock_irq
1.01% sys_read 0.86% __fget_light
1.08% dequeue_task_fair
1.00% __wake_up_sync_key 0.85% __sb_start_write
1.06% sys_read
0.93% __wake_up_common 0.85% int_ret_from_sys_call
1.04% int_with_check
0.92% copy_page_to_iter 0.83% syscall_trace_leave
1.02% update_curr
0.90% check_preempt_wakeup 0.78% new_sync_read
0.99% syscall_trace_enter
0.90% __srcu_read_lock 0.78% account_user_time
0.96% __fget_light
0.89% put_prev_task_fair 0.76% update_curr
0.93% __sb_start_write
0.88% copy_page_from_iter 0.74% fsnotify
0.89% copy_page_to_iter
0.82% __sb_end_write 0.73% try_to_wake_up
0.87% try_to_wake_up
0.76% __percpu_counter_add 0.71% finish_task_switch
0.86% check_preempt_wakeup
0.74% prepare_to_wait 0.70% _raw_spin_lock_irq
0.86% sys_write
0.72% touch_atime 0.69% __wake_up_sync_key
0.83% __fsnotify_parent
0.71% pipe_wait 0.69% __tick_nohz_task_switch
0.81% __wake_up_sync_key
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
