Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH REPOST] [2/3] SCHED: Mark all frequently used sysctls __read_mostly | Date | Sat, 15 Nov 2008 14:38:01 +0100 (CET) |
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There are more optimizations possible here, but that's for another patch.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- kernel/sched.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
Index: linux-2.6.28-rc4-test/kernel/sched.c =================================================================== --- linux-2.6.28-rc4-test.orig/kernel/sched.c 2008-11-12 12:32:52.000000000 +0100 +++ linux-2.6.28-rc4-test/kernel/sched.c 2008-11-12 12:52:52.000000000 +0100 @@ -686,7 +686,7 @@ #define SCHED_FEAT(name, enabled) \ (1UL << __SCHED_FEAT_##name) * enabled | -const_debug unsigned int sysctl_sched_features = +const_debug unsigned int sysctl_sched_features __read_mostly = #include "sched_features.h" 0; @@ -809,26 +809,26 @@ * Number of tasks to iterate in a single balance run. * Limited because this is done with IRQs disabled. */ -const_debug unsigned int sysctl_sched_nr_migrate = 32; +const_debug unsigned int sysctl_sched_nr_migrate __read_mostly = 32; /* * ratelimit for updating the group shares. * default: 0.25ms */ -unsigned int sysctl_sched_shares_ratelimit = 250000; +unsigned int sysctl_sched_shares_ratelimit __read_mostly = 250000; /* * Inject some fuzzyness into changing the per-cpu group shares * this avoids remote rq-locks at the expense of fairness. * default: 4 */ -unsigned int sysctl_sched_shares_thresh = 4; +unsigned int sysctl_sched_shares_thresh __read_mostly = 4; /* * period over which we measure -rt task cpu usage in us. * default: 1s */ -unsigned int sysctl_sched_rt_period = 1000000; +unsigned int sysctl_sched_rt_period __read_mostly = 1000000; static __read_mostly int scheduler_running;
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