Checked the entropy in an ARV4518pw (Lantiq Danube) running Attitude Adjustment
and the available
entropy was, more or less, between 300-400.
Found this link (http://vafer.org/blog/20071219173915/), so plugged a pendrive
and thanks to the
dwg-otg generated interrupts the entropy_avail increased a lot.
Pendrive plugged:
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 3971/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 3970/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 3970/4096
Unplugging the pendrive:
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 189/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 130/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 133/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 137/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 143/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 147/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 150/4096
root@OpenWrt:~# echo " Entropy:" $(cat
/proc/sys/kernel/random/entropy_avail)/$(cat
/proc/sys/kernel/random/poolsize)
Entropy: 155/4096
Interrupt sources:
root@OpenWrt:~# cat /proc/interrupts
CPU0
2: 0 MIPS cascade
3: 0 MIPS cascade
4: 0 MIPS cascade
5: 0 MIPS cascade
6: 0 MIPS cascade
7: 19860002 MIPS timer
30: 9485340 icu ath
62: 1265320007 icu dwc_otg, dwc_otg_hcd:usb1
73: 614766 icu eth_tx
78: 989711 icu eth_rx
112: 133 icu asc_tx
113: 0 icu asc_rx
114: 0 icu asc_err
126: 0 icu gptu
127: 0 icu gptu
128: 0 icu gptu
129: 0 icu gptu
130: 0 icu gptu
131: 0 icu gptu
ERR: 0
For some purposes maybe this is a serious problem.
Hope this information could be helpful.
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