Re: [RFC][PATCH 13/16] sched: Add core wide task selection and scheduling.

[Ingo Molnar]

* Subhra Mazumdar <subhra.mazumdar@xxxxxxxxxx> wrote:

> I see similar improvement with this patch as removing the condition I
> earlier mentioned. So that's not needed. I also included the patch for the
> priority fix. For 2 DB instances, HT disabling stands at -22% for 32 users
> (from earlier emails).
> 
> 
> 1 DB instance
> 
> users  baseline   %idle    core_sched %idle
> 16     1          84       -4.9% 84
> 24     1          76       -6.7% 75
> 32     1          69       -2.4% 69
> 
> 2 DB instance
> 
> users  baseline   %idle    core_sched %idle
> 16     1          66       -19.5% 69
> 24     1          54       -9.8% 57
> 32     1          42       -27.2%        48

So HT disabling slows down the 2DB instance by -22%, while core-sched 
slows it down by -27.2%?

Would it be possible to see all the results in two larger tables (1 DB 
instance and 2 DB instance) so that we can compare the performance of the 
3 kernel variants with each other:

 - "vanilla +HT": Hyperthreading enabled,  vanilla scheduler
 - "vanilla -HT": Hyperthreading disabled, vanilla scheduler
 - "core_sched":  Hyperthreading enabled,  core-scheduling enabled

?

Thanks,

	Ingo