topic Re: S32k144 PiL perf evaluation in Model-Based Design Toolbox (MBDT)

S32k144 PiL perf evaluation

liu_madeon — Thu, 18 Jun 2020 08:47:24 GMT

Hi talent,

I have the PiL result and try to evaluate Algorithm performance on S32K144,

and my s32k is default pil initialize

how do i know the mcu usage base on tick unit.

Thank you

Sincerely,

constantinrazva — Thu, 18 Jun 2020 09:58:18 GMT

Those are profiler ticks that are shown and that means 40MHz clock frequency.

Kind regards,

Razvan.

liu_madeon — Thu, 18 Jun 2020 10:14:00 GMT

thank you for your reply asap,

I try to calculate base on this method to know the CPU usage , is work or have any suggestion?

because I got the incredible tiny usage on my module,

0.000798925%(computing usage) = 31957(total function ticks)/40MHz

I try another way to test performance by lauterbach debug tool simple base profilling and got the average usage about 4%

I dont know why such big difference, so I push this question on community and find some probably reason

Thank you

Sincerely,

constantinrazva — Tue, 23 Jun 2020 16:45:43 GMT

Sorry for the detailed answer - please take a look at this thread: https://community.nxp.com/thread/535738#comment-1330768 where I propose a way in which you can approximate the CPU load.

Kind regards,

Razvan.