Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
sched: fine-tune SD_MC_INIT
Tune SD_MC_INIT the same way as SD_CPU_INIT:
unset SD_BALANCE_NEWIDLE, and set SD_WAKE_BALANCE.
This improves vmark by 5%:
vmark 132102 125968 125497 messages/sec avg 127855.66 .984
vmark 139404 131719 131272 messages/sec avg 134131.66 1.033
Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
# *DOCUMENTATION*
authored by Mike Galbraith and committed by Ingo Molnar 14800984 ca3273f9
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include/linux/topology.h
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include/linux/topology.h
···
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.wake_idx = 1, \
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.forkexec_idx = 1, \
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.flags = SD_LOAD_BALANCE \
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-
| SD_BALANCE_NEWIDLE \
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| SD_BALANCE_FORK \
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| SD_BALANCE_EXEC \
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| SD_WAKE_AFFINE \
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+
| SD_WAKE_BALANCE \
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| SD_SHARE_PKG_RESOURCES\
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| BALANCE_FOR_MC_POWER, \
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.last_balance = jiffies, \