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authorNikhil Rao <ncrao@google.com>2011-05-18 19:09:39 +0200
committerIngo Molnar <mingo@elte.hu>2011-05-20 14:16:50 +0200
commit1399fa7807a1a5998bbf147e80668e9950661dfa (patch)
treedc4e1a97f50b8e7297c82f63e1ad2b15430b33d9 /include
parentsched: Cleanup set_load_weight() (diff)
downloadlinux-1399fa7807a1a5998bbf147e80668e9950661dfa.tar.xz
linux-1399fa7807a1a5998bbf147e80668e9950661dfa.zip
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')
-rw-r--r--include/linux/sched.h13
1 files changed, 8 insertions, 5 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 12211e1666e2..f2f440221b70 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 */