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Subject[patch/s390 34/46] topology: define SD_MC_INIT to fix performance regression
From: Heiko Carstens <heiko.carstens@de.ibm.com>

The default values for SD_MC_INIT cause an additional cpu usage of up
to 40% on some network benchmarks compared to the plain SD_CPU_INIT
values. So just define SD_MC_INIT to SD_CPU_INIT.
More tuning needs to be done.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/include/asm/topology.h | 2 ++
1 file changed, 2 insertions(+)
Index: quilt-2.6/arch/s390/include/asm/topology.h
===================================================================
--- quilt-2.6.orig/arch/s390/include/asm/topology.h
+++ quilt-2.6/arch/s390/include/asm/topology.h
@@ -30,6 +30,8 @@ static inline void s390_init_cpu_topolog
};
#endif

+#define SD_MC_INIT SD_CPU_INIT
+
#include <asm-generic/topology.h>

#endif /* _ASM_S390_TOPOLOGY_H */
--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.



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