The cpu_load decays on time according past cpu load of rq. The sched_avg also decays tasks' load on time. Now we has 2 kind decay for cpu_load. That is a kind of redundancy. And increase the system load by decay calculation. This patch try to remove the cpu_load decay.
There are 5 load_idx used for cpu_load in sched_domain. busy_idx and idle_idx are not zero usually, but newidle_idx, wake_idx and forkexec_idx are all zero on every arch. A shortcut to remove cpu_Load decay in the first patch. just one line patch for this change. V3, 1, correct the wake_affine bias. Thanks for Morten's reminder! 2, replace source_load by weighted_cpuload for better function name meaning. V2, 1, This version do some tuning on load bias of target load. 2, Got further to remove the cpu_load in rq. 3, Revert the patch 'Limit sd->*_idx range on sysctl' since no needs Any testing/comments are appreciated. This patch rebase on latest tip/master. The git tree for this patchset at: g...@github.com:alexshi/power-scheduling.git noload -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
