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Vaidyanathan Srinivasan 100fdaee70 sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0 
Impact: change task balancing to save power more agressively

Add SD_BALANCE_NEWIDLE flag at MC level and CPU level
if sched_mc is set.  This helps power savings and
will not affect performance when sched_mc=0

Ingo and Mike Galbraith have optimised the SD flags by
removing SD_BALANCE_NEWIDLE at MC and CPU level.  This
helps performance but hurts power savings since this
slows down task consolidation by reducing the number
of times load_balance is run.

    sched: fine-tune SD_MC_INIT
        commit 1480098470
        Author: Mike Galbraith <efault@gmx.de>
        Date:   Fri Nov 7 15:26:50 2008 +0100

    sched: re-tune balancing -- revert
        commit 9fcd18c9e6
        Author: Ingo Molnar <mingo@elte.hu>
        Date:   Wed Nov 5 16:52:08 2008 +0100

This patch selectively enables SD_BALANCE_NEWIDLE flag
only when sched_mc is set to 1 or 2.  This helps power savings
by task consolidation and also does not hurt performance at
sched_mc=0 where all power saving optimisations are turned off.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-19 09:21:55 +01:00
..
acpi ACPICA: disable _BIF warning 2008-11-27 02:17:30 -05:00
asm-arm
asm-frv
asm-generic Merge ../linux-2.6-x86 2008-12-13 21:55:51 +10:30
asm-h8300
asm-m32r Merge ../linux-2.6-x86 2008-12-13 21:55:51 +10:30
asm-m68k proc: move /proc/hardware to m68k-specific code 2008-10-23 14:24:03 +04:00
asm-mn10300 MN10300: Fix __put_user_asm8() 2008-12-10 13:34:33 -08:00
asm-xtensa Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6 2008-10-23 09:16:56 -07:00
crypto
drm drm: move drm vblank initialization/cleanup to driver load/unload 2008-11-25 09:49:03 +10:00
keys
linux sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0 2008-12-19 09:21:55 +01:00
math-emu math-emu: Fix thinko in _FP_DIV 2008-10-22 22:09:59 -07:00
media V4L/DVB (9335): videobuf: split unregister bus creating self-contained frontend de-allocator 2008-10-21 14:32:08 -02:00
mtd
net net: Fix soft lockups/OOM issues w/ unix garbage collector 2008-11-26 15:32:27 -08:00
pcmcia
rdma
rxrpc
scsi [SCSI] fc_transport: fix old bug on bitflag definitions 2008-11-21 17:30:53 +09:00
sound Merge branches 'topic/fix/misc' and 'topic/fix/hda' into for-linus 2008-11-10 17:58:46 +01:00
trace tracing/fastboot: include missing headers 2008-12-12 09:26:13 +01:00
video Revert "radeonfb: accelerate imageblit and other improvements" 2008-12-10 16:53:32 -08:00
xen
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