RE: Sched.c ??

Greg Smart (GSmart@tennyson.com.au)
Wed, 19 May 1999 16:23:26 +1000

hi,
the decay function can be modified by changing the
numbers. e.g. if you changed prev->avg_slice*1 to prev->avg_slice*2
then you would have to change the denominator to 3, and
that would slow the attack/decay rate of the function.

You would expect these values to be defined in constants, but
I guess no-one ever plays around with them, so they stay as
they are.

cheers
Greg

> -----Original Message-----
> From: Mofeed Shahin [SMTP:shahin@labf.org]
> Sent: Wednesday, May 19, 1999 12:31 AM
> To: linux-kernel@vger.rutgers.edu
> Subject: Sched.c ??
>
>
> At line 810 of sched.c in 2.3.3 there is the following line :
>
> prev->avg_slice = (this_slice*1 + prev->avg_slice*1)/2;
>
> My question is, why multiply by 1 ?
> ie what is the difference between the following two :
>
> prev->avg_slice = (this_slice*1 + prev->avg_slice*1)/2;
> prev->avg_slice = (this_slice + prev->avg_slice)/2;
>
>
> Cheers Mof.
>
>
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