[PATCH] sched: altix tuning

From: Nick Piggin <nickpiggin@yahoo.com.au>

From: John Hawkes

The following brings up performance on a 64-way Altix.  This system being on
the smaller end of the scale should also be applicable to other NUMA systems.

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4db7c5bee5c5c6d11d925d256a19c3ce9f57c5c3..640fa201457ba21e22cf6c7e40af98e0b60286d2 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -631,7 +631,7 @@ struct sched_domain {
        .groups                 = NULL,                 \
        .min_interval           = 8,                    \
        .max_interval           = 256*fls(num_online_cpus()),\
-       .busy_factor            = 8,                    \
+       .busy_factor            = 32,                   \
        .imbalance_pct          = 125,                  \
        .cache_hot_time         = (10*1000000),         \
        .cache_nice_tries       = 1,                    \