How to measure the write intensity of a media in Linux?

Question

linux

Good time!
How could one quantify how busy the flash card writing interface is? or throughput, but real, not hypothetical?
My program writes data to a file at a fairly high speed (about 8 megabytes per second). But the recording is done on a microcomputer and the speed there is much lower than on a large PC. I'm trying to figure out if my program can't handle the data flow or the file can't be written as fast as it needs to be.
Thanks everyone!

Answer 1

user$ dd if=/dev/zero of=/home/cubie/test bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 10.2675 s, 10.2 MB/s

Answer 2

regular top see what is loaded by us or wa

Answer 3

Disk performance