sched: more agressive idle balancing

the Linux scheduler is starving a number of workloads. So default
to more agressive idle-balancing. This hurts lmbench context-switching
numbers (which was the main reason we sucked at idle-balancing for
such a long time) but the lmbench numbers are fine once the system is
minimally utilized.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/linux/topology.h b/include/linux/topology.h
index a9d1f04..da6c39b 100644 (file)
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -98,7 +98,7 @@
        .cache_nice_tries       = 0,                    \
        .busy_idx               = 0,                    \
        .idle_idx               = 0,                    \
-       .newidle_idx            = 1,                    \
+       .newidle_idx            = 0,                    \
        .wake_idx               = 0,                    \
        .forkexec_idx           = 0,                    \
        .flags                  = SD_LOAD_BALANCE       \
@@ -128,14 +128,15 @@
        .imbalance_pct          = 125,                  \
        .cache_nice_tries       = 1,                    \
        .busy_idx               = 2,                    \
-       .idle_idx               = 1,                    \
-       .newidle_idx            = 2,                    \
+       .idle_idx               = 0,                    \
+       .newidle_idx            = 0,                    \
        .wake_idx               = 1,                    \
        .forkexec_idx           = 1,                    \
        .flags                  = SD_LOAD_BALANCE       \
                                | SD_BALANCE_NEWIDLE    \
                                | SD_BALANCE_EXEC       \
                                | SD_WAKE_AFFINE        \
+                               | SD_WAKE_IDLE          \
                                | SD_SHARE_PKG_RESOURCES\
                                | BALANCE_FOR_MC_POWER, \
        .last_balance           = jiffies,              \
@@ -158,14 +159,15 @@
        .imbalance_pct          = 125,                  \
        .cache_nice_tries       = 1,                    \
        .busy_idx               = 2,                    \
-       .idle_idx               = 1,                    \
-       .newidle_idx            = 2,                    \
+       .idle_idx               = 0,                    \
+       .newidle_idx            = 0,                    \
        .wake_idx               = 1,                    \
        .forkexec_idx           = 1,                    \
        .flags                  = SD_LOAD_BALANCE       \
                                | SD_BALANCE_NEWIDLE    \
                                | SD_BALANCE_EXEC       \
                                | SD_WAKE_AFFINE        \
+                               | SD_WAKE_IDLE          \
                                | BALANCE_FOR_PKG_POWER,\
        .last_balance           = jiffies,              \
        .balance_interval       = 1,                    \