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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-03-18 13:27:33 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-18 13:28:12 +0100 |
| commit | f55d63854e426e95d7858c2662c2353262a5af70 (patch) | |
| tree | 626d95bcb9ae76c66641bb26cdd99235929958ca /arch | |
| parent | [S390] __div64_31 broken for CONFIG_MARCH_G5 (diff) | |
| download | linux-dev-f55d63854e426e95d7858c2662c2353262a5af70.tar.xz linux-dev-f55d63854e426e95d7858c2662c2353262a5af70.zip | |
[S390] topology: define SD_MC_INIT to fix performance regression
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/topology.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h index c93eb50e1d09..c979c3b56ab0 100644 --- a/arch/s390/include/asm/topology.h +++ b/arch/s390/include/asm/topology.h @@ -30,6 +30,8 @@ static inline void s390_init_cpu_topology(void) }; #endif +#define SD_MC_INIT SD_CPU_INIT + #include <asm-generic/topology.h> #endif /* _ASM_S390_TOPOLOGY_H */ |