Re: [RFC PATCH v2] sched: Limit idle_balance()

[Jason Low]

On Sun, 2013-07-21 at 23:02 +0530, Preeti U Murthy wrote:
> Hi Json,
> 
> With V2 of your patch here are the results for the ebizzy run on
> 3.11-rc1 + patch on  a 1 socket, 16 core powerpc machine. Each ebizzy
> run was for 30 seconds.
> 
> Number_of_threads         %improvement_with_patch
>     4                        8.63
>     8                        1.29
>     12                       9.98
>     16                      20.46
> 
> Let me know if you want me to profile any of these runs for specific
> statistics.

Hi Preeti,

Other numbers that would be interesting to know are the % improvements
when N = 20. That is when I'm getting the bigger performance boosts on
some of the AIM7 workloads.

Would you like to re-run ebizzy with v2 of my patch except replacing
this line of code:
	if (idle_duration / 10 < (sd->avg_idle_balance_cost + cost))
with this line of code:
	if (idle_duration / 20 < (sd->avg_idle_balance_cost + cost))

Thanks a lot,
Jason

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