how to improve entropy value ? base on imx8mq yocto

[chenfeng2016]

hello.

   we have a qestion  need your help

   we test on the imx8mq with Linux 4.14.78_1.0.0 release(yocot),  the entropy value is low, by cat /proc/sys/kernel/random/entropy_avail

   we want to improve the value (for exsample to 2000), how to do ? 

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

22

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

23

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

23

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

23

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

24

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

25

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

25

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

43

root@imx8mqevk:~# cat /proc/sys/kernel/random/entropy_avail 

44

thanks 

feng

[igorpadykov]

Hi feng

one can try rng-tools

https://www.howtoforge.com/helping-the-random-number-generator-to-gain-enough-entropy-with-rng-tools... 

Best regards
igor
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[chenfeng2016]

Hello. igor

  thanks you very much.

  The web link you provided is the debian system for rng-tools.

  The imx8mq run the yocto system , how to do for rng-tool and the  entropy_avail vavlue ?

Best regards

 Feng

[igorpadykov]

https://git.yoctoproject.org/cgit.cgi/poky/plain/meta/recipes-support/rng-tools/rng-tools_6.9.bb 

Best regards
igor

[chenfeng2016]

Hello igor,

  The entropy_avail vavlue can be changed to 3000, according to your instructions

thanks

Feng