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sched: more agressive idle balancing

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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>
This commit is contained in:
Ingo Molnar
2007-07-09 18:52:01 +02:00
parent 0fec171cdb
commit 9c4801cebc
1 changed files with 7 additions and 5 deletions
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12
include/linux/topology.h
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@@ -98,7 +98,7 @@
.cache_nice_tries = 0, \ .cache_nice_tries = 0, \
.busy_idx = 0, \ .busy_idx = 0, \
.idle_idx = 0, \ .idle_idx = 0, \
.newidle_idx = 1, \ .newidle_idx = 0, \
.wake_idx = 0, \ .wake_idx = 0, \
.forkexec_idx = 0, \ .forkexec_idx = 0, \
.flags = SD_LOAD_BALANCE \ .flags = SD_LOAD_BALANCE \
@@ -128,14 +128,15 @@
.imbalance_pct = 125, \ .imbalance_pct = 125, \
.cache_nice_tries = 1, \ .cache_nice_tries = 1, \
.busy_idx = 2, \ .busy_idx = 2, \
.idle_idx = 1, \ .idle_idx = 0, \
.newidle_idx = 2, \ .newidle_idx = 0, \
.wake_idx = 1, \ .wake_idx = 1, \
.forkexec_idx = 1, \ .forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \ .flags = SD_LOAD_BALANCE \
| SD_BALANCE_NEWIDLE \ | SD_BALANCE_NEWIDLE \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_WAKE_AFFINE \ | SD_WAKE_AFFINE \
| SD_WAKE_IDLE \
| SD_SHARE_PKG_RESOURCES\ | SD_SHARE_PKG_RESOURCES\
| BALANCE_FOR_MC_POWER, \ | BALANCE_FOR_MC_POWER, \
.last_balance = jiffies, \ .last_balance = jiffies, \
@@ -158,14 +159,15 @@
.imbalance_pct = 125, \ .imbalance_pct = 125, \
.cache_nice_tries = 1, \ .cache_nice_tries = 1, \
.busy_idx = 2, \ .busy_idx = 2, \
.idle_idx = 1, \ .idle_idx = 0, \
.newidle_idx = 2, \ .newidle_idx = 0, \
.wake_idx = 1, \ .wake_idx = 1, \
.forkexec_idx = 1, \ .forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \ .flags = SD_LOAD_BALANCE \
| SD_BALANCE_NEWIDLE \ | SD_BALANCE_NEWIDLE \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_WAKE_AFFINE \ | SD_WAKE_AFFINE \
| SD_WAKE_IDLE \
| BALANCE_FOR_PKG_POWER,\ | BALANCE_FOR_PKG_POWER,\
.last_balance = jiffies, \ .last_balance = jiffies, \
.balance_interval = 1, \ .balance_interval = 1, \