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Subject[PATCH] sched: CPU_THRESHOLD
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Hi,

Next patch provides a CPU_THRESHOLD; makes sense since we also have a NODE_THRESHOLD as tuning knob.


Frank.


sched.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)


diff -Nru a/kernel/sched.c b/kernel/sched.c
--- a/kernel/sched.c Fri Aug 22 14:20:23 2003
+++ b/kernel/sched.c Fri Aug 22 14:20:23 2003
@@ -76,6 +76,7 @@
#define MAX_SLEEP_AVG (10*HZ)
#define STARVATION_LIMIT (10*HZ)
#define NODE_THRESHOLD 125
+#define CPU_THRESHOLD 75

/*
* If a task is 'interactive' then we reinsert it in the active
@@ -963,10 +964,9 @@
if (likely(!busiest))
goto out;

- *imbalance = (max_load - nr_running) / 2;
+ *imbalance = (max_load - nr_running) >> 1;

- /* It needs an at least ~25% imbalance to trigger balancing. */
- if (!idle && (*imbalance < (max_load + 3)/4)) {
+ if (!idle && (*imbalance*100 < nr_running*CPU_THRESHOLD)) {
busiest = NULL;
goto out;
}


-
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