diff options
| author | Nikhil Rao <ncrao@google.com> | 2011-05-18 17:09:39 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-20 12:16:50 (GMT) |
| commit | 1399fa7807a1a5998bbf147e80668e9950661dfa (patch) | |
| tree | dc4e1a97f50b8e7297c82f63e1ad2b15430b33d9 /include/linux/sched.h | |
| parent | f05998d4b80632f2cc00f108da503066ef5d38d5 (diff) | |
| download | linux-fsl-qoriq-1399fa7807a1a5998bbf147e80668e9950661dfa.tar.xz | |
sched: Introduce SCHED_POWER_SCALE to scale cpu_power calculations
SCHED_LOAD_SCALE is used to increase nice resolution and to
scale cpu_power calculations in the scheduler. This patch
introduces SCHED_POWER_SCALE and converts all uses of
SCHED_LOAD_SCALE for scaling cpu_power to use SCHED_POWER_SCALE
instead.
This is a preparatory patch for increasing the resolution of
SCHED_LOAD_SCALE, and there is no need to increase resolution
for cpu_power calculations.
Signed-off-by: Nikhil Rao <ncrao@google.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Nikunj A. Dadhania <nikunj@linux.vnet.ibm.com>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Stephan Barwolf <stephan.baerwolf@tu-ilmenau.de>
Cc: Mike Galbraith <efault@gmx.de>
Link: http://lkml.kernel.org/r/1305738580-9924-3-git-send-email-ncrao@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 12211e1..f2f44022 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -788,17 +788,20 @@ enum cpu_idle_type { }; /* - * sched-domains (multiprocessor balancing) declarations: - */ - -/* * Increase resolution of nice-level calculations: */ #define SCHED_LOAD_SHIFT 10 #define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT) -#define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE +/* + * Increase resolution of cpu_power calculations + */ +#define SCHED_POWER_SHIFT 10 +#define SCHED_POWER_SCALE (1L << SCHED_POWER_SHIFT) +/* + * sched-domains (multiprocessor balancing) declarations: + */ #ifdef CONFIG_SMP #define SD_LOAD_BALANCE 0x0001 /* Do load balancing on this domain. */ #define SD_BALANCE_NEWIDLE 0x0002 /* Balance when about to become idle */ |