Messages in this thread Patch in this message | | | Date | Wed, 18 Mar 2009 13:48:31 +0100 | From | Martin Schwidefsky <> | Subject | [patch 2/6] topology: define SD_MC_INIT to fix performance regression |
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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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