[Sound-open-firmware] [PATCH] [RFC]platform: calculate the percentage of cpu cycle

[zhigangw]

On 2018年06月22日 18:13, Liam Girdwood wrote:
> On Fri, 2018-06-22 at 16:46 +0800, zhigangw wrote:
>>> Liam
>> I want to estimate the CPU usage.
>> How to estimate this with the verbose trace.
>> Do you have any idea?
> The pipeline work can be timed by looking at the pipeline schedule start and
> finish trace messages and the time delta between them.
>
> e.g. consider a pipeline with a 1ms scheduling tick that takes 200uS to run from
> start to finish. The pipeline CPU utilisation is 20%
>
> Liam
Hmm, this way would not take the scheduler period into account.
And using the timestamp, I am not sure  whether it is accurate than 
using the CCOUNT register.
I will give another RFC later. please check it.
Thanks
~Zhigang