Re: [patch v5 06/15] sched: log the cpu utilization at rq
From: Alex Shi
Date: Wed Feb 20 2013 - 20:35:33 EST
On 02/20/2013 11:20 PM, Peter Zijlstra wrote:
> On Wed, 2013-02-20 at 22:33 +0800, Alex Shi wrote:
>>> There's generally a better value than 100 when using computers..
>>> how 100 is 64+32+4.
>> I didn't find a good example for this. and no idea of your suggestion,
>> would you like to explain a bit more?
> Basically what you're doing ends up being fixed point math, using 100 as
> unit is inefficient, pick a power-of-2 and everything reduces to
> So use 128 or 1024 or whatever and you don't need mult and div
> instructions to represent [0,1]
got it. will reconsider this.
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