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authorNick Piggin <nickpiggin@yahoo.com.au>2005-11-16 23:37:53 +1100
committerPaul Mackerras <paulus@samba.org>2005-11-17 16:52:18 +1100
commit5cfccd7f132432dd4705444a44b51d12ef88a85f (patch)
tree9f95ebe7465c302eef9680be44048f3f11b97ed1 /include/asm-powerpc
parent0db169f9703115bab09eda5d89a8f6937a7bf98e (diff)
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[PATCH] powerpc: Fix database regression due to scheduler changes
PowerPC's NUMA domain doesn't currently set up some of the newer sched-domains parameters. Brian Twichell <tbrian@us.ibm.com> discovered and diagnosed a 1.5% OLTP database regression on a 4 core POWER5 system that was due to the use of NUMA scheduling on ppc64. This patch applies some saneish values to the parameters, in line with other architectures. This solves the regression. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/topology.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-powerpc/topology.h b/include/asm-powerpc/topology.h
index 015d287..0e8c20c 100644
--- a/include/asm-powerpc/topology.h
+++ b/include/asm-powerpc/topology.h
@@ -41,6 +41,10 @@ static inline int node_to_first_cpu(int node)
.cache_hot_time = (10*1000000), \
.cache_nice_tries = 1, \
.per_cpu_gain = 100, \
+ .busy_idx = 3, \
+ .idle_id = 1, \
+ .newidle_idx = 2, \
+ .wake_idx = 1, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_EXEC \
| SD_BALANCE_NEWIDLE \