On 02/18/2014 12:52 PM, Michael wang wrote: > On 02/17/2014 09:55 AM, Alex Shi wrote: >> 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. >> >> V2, >> 1, This version do some tuning on load bias of target load, to maximum match >> current code logical. >> 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. > > Tested on 12-cpu-x86 box with tip/master, ebizzy and hackbench > works fine, show little improvements for each time's testing.
Thanks a lot for your data! > > > BTW, I got panic while rebooting, but should not caused by > this patch set, will recheck and post the report later. > I reviewed my patch again. Also didn't find suspicious line for the following rcu stall. Will wait for your report. :) > -- Thanks Alex -- 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/