clock_gettime not working on iMX8M?

xianju_wang — Tue, 25 Jun 2019 19:53:12 GMT

I am using iMX8M Quad EVK. I am trying to use clock_gettime() to calculate how much time myfunction runs on Cortex-M4. But stop.tv_nsec and start.tv_nsec both are zero.

clock_gettime(CLOCK_REALTIME, &start);

myfunction(s1, b_fb, y);

clock_gettime(CLOCK_REALTIME, &stop);

printf("%ld\n", stop.tv_nsec);
printf("%ld\n", start.tv_nsec);

Thanks.

Xianju

Re: clock_gettime not working on iMX8M?

jimmychan — Thu, 27 Jun 2019 07:55:54 GMT

this may help you

c - What is the proper way to use clock_gettime()? - Stack Overflow

i.MX ProcessorsのトピックRe: clock_gettime not working on iMX8M?

clock_gettime not working on iMX8M?

Re: clock_gettime not working on iMX8M?