Messages in this thread Patch in this message | | | Subject | sched: context tracking demolishes pipe-test | From | Mike Galbraith <> | Date | Sun, 30 Jun 2013 09:57:36 +0200 |
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taskset -c 3 pipe-test 1
switch-rate 3.10.0-master 426.4 KHz 3.10.0-masterx 591.8 Khz 1.387 (591=notgood, 426=omfg)
3.10.0-master 3.10.0-masterx 7.13% [k] __schedule 9.58% [k] __schedule ! 6.02% [.] __read_nocancel 8.25% [k] system_call ! 5.82% [.] __write_nocancel 5.34% [k] _raw_spin_lock_irqsave ! 4.28% [k] system_call 4.26% [k] pipe_read ! 4.13% [k] user_exit 3.53% [k] copy_user_generic_string 3.64% [k] _raw_spin_lock_irqsave 3.52% [k] native_sched_clock 3.37% [k] pipe_read 3.43% [k] __switch_to 2.72% [k] copy_user_generic_string 3.21% [.] main 2.60% [.] main 2.96% [k] mutex_lock 2.59% [k] native_sched_clock 2.89% [k] mutex_unlock 2.47% [k] __switch_to 2.86% [k] sched_clock_local 2.10% [k] mutex_unlock 2.63% [.] __read_nocancel 2.08% [k] sched_clock_local 2.47% [k] pipe_write 2.05% [k] mutex_lock 2.37% [k] _raw_spin_unlock_irqrestore 1.91% [k] pipe_write 1.96% [.] __write_nocancel 1.89% [k] user_enter 1.62% [k] vfs_write 1.72% [k] _raw_spin_unlock_irqrestore 1.54% [k] do_sync_write 1.51% [k] rcu_eqs_enter_common.isra.47 1.52% [k] fget_light 1.41% [k] rcu_eqs_exit_common.isra.45 1.48% [k] fsnotify 1.30% [k] tracesys 1.39% [k] dequeue_task_fair 1.23% [k] fsnotify 1.39% [k] update_curr 1.23% [k] int_check_syscall_exit_worka 1.37% [k] do_sync_read 1.20% [k] fget_light 1.33% [.] __GI___libc_write 1.16% [k] vfs_write 1.29% [k] try_to_wake_up 1.05% [k] syscall_trace_enter 1.09% [k] _raw_spin_lock_irq 1.04% [k] do_sync_write 1.08% [k] pipe_iov_copy_from_user 1.03% [k] context_tracking_task_switch 1.05% [k] finish_task_switch 0.99% [k] update_curr 1.04% [k] prepare_to_wait
marge:/usr/local/src/kernel/linux-3.x.git # diff -up config.horrible config.not-as-bad --- config.horrible 2013-06-30 08:38:47.785258079 +0200 +++ config.not-as-bad 2013-06-30 08:33:08.246761153 +0200 @@ -48,7 +48,7 @@ CONFIG_BUILDTIME_EXTABLE_SORT=y # CONFIG_INIT_ENV_ARG_LIMIT=32 CONFIG_CROSS_COMPILE="" -CONFIG_LOCALVERSION="-master" +CONFIG_LOCALVERSION="-masterx" # CONFIG_LOCALVERSION_AUTO is not set CONFIG_HAVE_KERNEL_GZIP=y CONFIG_HAVE_KERNEL_BZIP2=y @@ -126,7 +126,7 @@ CONFIG_TREE_RCU=y CONFIG_RCU_STALL_COMMON=y CONFIG_CONTEXT_TRACKING=y CONFIG_RCU_USER_QS=y -CONFIG_CONTEXT_TRACKING_FORCE=y +# CONFIG_CONTEXT_TRACKING_FORCE is not set CONFIG_RCU_FANOUT=64 CONFIG_RCU_FANOUT_LEAF=16 # CONFIG_RCU_FANOUT_EXACT is not set marge:/usr/local/src/kernel/linux-3.x.git # grep NO_HZ .config CONFIG_NO_HZ_COMMON=y CONFIG_NO_HZ_IDLE=y # CONFIG_NO_HZ_FULL is not set CONFIG_NO_HZ=y # CONFIG_RCU_FAST_NO_HZ is not set
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