Messages in this thread | | | Date | Tue, 18 Feb 2014 14:03:35 +0800 | From | Alex Shi <> | Subject | Re: [PATCH v2 0/11] remove cpu_load in rq |
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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
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