sched: Disable wakeup balancing

Sysbench thinks SD_BALANCE_WAKE is too agressive and kbuild doesn't
really mind too much, SD_BALANCE_NEWIDLE picks up most of the
slack.

On a dual socket, quad core, dual thread nehalem system:

sysbench (--num_threads=16):

 SD_BALANCE_WAKE-: 13982 tx/s
 SD_BALANCE_WAKE+: 15688 tx/s

kbuild (-j16):

 SD_BALANCE_WAKE-: 47.648295846  seconds time elapsed   ( +-   0.312% )
 SD_BALANCE_WAKE+: 47.608607360  seconds time elapsed   ( +-   0.026% )

(same within noise)

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 2 deletions

diff --git a/arch/ia64/include/asm/topology.h b/arch/ia64/include/asm/topology.h
index 569b9dafc78c..d0141fbf51d0 100644
--- a/arch/ia64/include/asm/topology.h
+++ b/arch/ia64/include/asm/topology.h
@@ -68,7 +68,6 @@ void build_cpu_to_node_map(void);
                                 | SD_BALANCE_NEWIDLE    \
                                 | SD_BALANCE_EXEC       \
                                 | SD_BALANCE_FORK       \
-                                | SD_BALANCE_WAKE       \
                                 | SD_WAKE_AFFINE,       \
         .last_balance           = jiffies,              \
         .balance_interval       = 1,                    \
@@ -94,7 +93,6 @@ void build_cpu_to_node_map(void);
                                 | SD_BALANCE_NEWIDLE    \
                                 | SD_BALANCE_EXEC       \
                                 | SD_BALANCE_FORK       \
-                                | SD_BALANCE_WAKE       \
                                 | SD_SERIALIZE,         \
         .last_balance           = jiffies,              \
         .balance_interval       = 64,                   \