Ejecutamos

mdb -k 

y luego los comandos

::swrand_stats
::rnd_stats

# mdb -k
Loading modules: [ unix genunix specfs dtrace mac cpu.generic uppc pcplusmp zvpsm scsi_vhci zfs ip hook neti arp usba kssl sockfs lofs random idm cpc crypto fcip fctl 
fcp ufs logindmux nsmb ptm sppp ipc ]
> 

> ::swrand_stats  
Software-based entropy generator statistics:
     980 bytes of entropy estimate
  835040 bits of entropy added to the raw pool
   51700 bytes of full entropy added to the pool
   50706 bytes of full entropy extracted from the pool
      16 bytes added to the pool by consumers
   50706 bytes entropy received by the consumers
> ::rnd_stats
Random number device statistics:
   19966 bytes generated for /dev/random
    3280 bytes read from /dev/random cache
 3159196 bytes generated for /dev/urandom
>