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| author | Ingo Molnar <mingo@kernel.org> | 2013-08-14 17:58:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-08-14 17:58:56 +0200 |
| commit | 6f1d657668ac3041b65265d3653d7e9172a0d603 (patch) | |
| tree | 6e837c683783708637cc4caf9de759166c7469b7 /arch/s390/include | |
| parent | Linux 3.11-rc5 (diff) | |
| parent | nohz: Optimize full dynticks's sched hooks with static keys (diff) | |
| download | linux-6f1d657668ac3041b65265d3653d7e9172a0d603.tar.xz linux-6f1d657668ac3041b65265d3653d7e9172a0d603.zip | |
Merge branch 'timers/nohz-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz
Pull nohz improvements from Frederic Weisbecker:
" It mostly contains fixes and full dynticks off-case optimizations. I believe that
distros want to enable this feature so it seems important to optimize the case
where the "nohz_full=" parameter is empty. ie: I'm trying to remove any performance
regression that comes with NO_HZ_FULL=y when the feature is not used.
This patchset improves the current situation a lot (off-case appears to be around 11% faster
with hackbench, although I guess it may vary depending on the configuration but it should be
significantly faster in any case) now there is still some work to do: I can still observe a
remaining loss of 1.6% throughput seen with hackbench compared to CONFIG_NO_HZ_FULL=n. "
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/cputime.h | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/vtime.h | 7 |
2 files changed, 7 insertions, 3 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h index d2ff41370c0c..f65bd3634519 100644 --- a/arch/s390/include/asm/cputime.h +++ b/arch/s390/include/asm/cputime.h @@ -13,9 +13,6 @@ #include <asm/div64.h> -#define __ARCH_HAS_VTIME_ACCOUNT -#define __ARCH_HAS_VTIME_TASK_SWITCH - /* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */ typedef unsigned long long __nocast cputime_t; diff --git a/arch/s390/include/asm/vtime.h b/arch/s390/include/asm/vtime.h new file mode 100644 index 000000000000..af9896c53eb3 --- /dev/null +++ b/arch/s390/include/asm/vtime.h @@ -0,0 +1,7 @@ +#ifndef _S390_VTIME_H +#define _S390_VTIME_H + +#define __ARCH_HAS_VTIME_ACCOUNT +#define __ARCH_HAS_VTIME_TASK_SWITCH + +#endif /* _S390_VTIME_H */ |