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| author | Ingo Molnar <mingo@elte.hu> | 2006-01-30 20:24:38 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-31 10:23:31 -0800 |
| commit | 70b4d63e98fd93fb9742708a54f872cba24e0fea (patch) | |
| tree | 016df3fe69c8ca9240d489f846b69674b8746a2d /kernel | |
| parent | 7fcdf327bedfe9cc418af49429d0fc0e48d98de9 (diff) | |
| download | linux-70b4d63e98fd93fb9742708a54f872cba24e0fea.tar.gz linux-70b4d63e98fd93fb9742708a54f872cba24e0fea.tar.bz2 linux-70b4d63e98fd93fb9742708a54f872cba24e0fea.zip | |
[PATCH] Fix boot-time slowdown for measure_migration_cost
This reduces the amount of time the migration cost calculations cost
during bootup. Based on numbers by Tony Luck <tony.luck@intel.com>.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 3ee2ae45125f..ec7fd9cee306 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -5141,7 +5141,7 @@ static void init_sched_build_groups(struct sched_group groups[], cpumask_t span, #define SEARCH_SCOPE 2 #define MIN_CACHE_SIZE (64*1024U) #define DEFAULT_CACHE_SIZE (5*1024*1024U) -#define ITERATIONS 2 +#define ITERATIONS 1 #define SIZE_THRESH 130 #define COST_THRESH 130 @@ -5480,9 +5480,9 @@ static unsigned long long measure_migration_cost(int cpu1, int cpu2) break; } /* - * Increase the cachesize in 5% steps: + * Increase the cachesize in 10% steps: */ - size = size * 20 / 19; + size = size * 10 / 9; } if (migration_debug) |