imx6ul hrtimer problem

wayneshih — Fri, 04 Dec 2020 05:42:51 GMT

Hi,

I'm using imx6ulevk YOCTO sumo linux kernel L4.14.98-2.3.1.

I'm testing the minimum timing of hrtimer in imx6ul. My testing is just enable the hrtimer for a period (e.g 5 ms) and each period we toggle the gpio result.

I found that the minimum timer is only 96 micro seconds even though I set the timing to 50 micro second. It's quite slow.

In my application, I want at least 10 micro seconds timer.

Anyone have the idea?

Re: imx6ul hrtimer problem

igorpadykov — Fri, 04 Dec 2020 06:53:27 GMT

Hi wayneshih

reason for that may be large software overheads as linux is running many tasks

concurrently. One can try to achieve better resolution with M4 SDK (look at gpt_timer.c, epit.c)

SDK2.2_iMX6UL_WIN

Best regards
igor

topic imx6ul hrtimer problem in i.MX Processors

imx6ul hrtimer problem

Re: imx6ul hrtimer problem

SDK2.2_iMX6UL_WIN