swrng -dd -fn STDOUT -nb 12000000000 | rngtest
rngtest 5
Copyright (c) 2004 by Henrique de Moraes Holschuh
This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

rngtest: starting FIPS tests...
rngtest: entropy source drained
rngtest: bits received from input: 96000000000
rngtest: FIPS 140-2 successes: 4796227
rngtest: FIPS 140-2 failures: 3772
rngtest: FIPS 140-2(2001-10-10) Monobit: 494
rngtest: FIPS 140-2(2001-10-10) Poker: 455
rngtest: FIPS 140-2(2001-10-10) Runs: 1453
rngtest: FIPS 140-2(2001-10-10) Long run: 1395
rngtest: FIPS 140-2(2001-10-10) Continuous run: 0
rngtest: input channel speed: (min=9.687; avg=574.973; max=19073.486)Mibits/s
rngtest: FIPS tests speed: (min=39.736; avg=219.043; max=241.437)Mibits/s
rngtest: Program run time: 577610829 microseconds