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@@ -21,6 +21,7 @@ Dieharder is by far the most extensive blackbox test suite. However, it is orig
Generally the best approach to use `dieharder` is to first generate an output file, e.g. `random.out` to run the tests on, so `dieharder` can apply all its individual tests to the same data. For a standard test, at least about 14 GB worth of data are needed; more if one of the tests needing large amounts of data returns a suspect result and `dieharder` re-tries the same test with more data.
The command line options I (bs) personally use are `dieharder -g 201 -f random.out -s 1 -Y 1 -k 2 -a`:
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* `-g 201 -f random.out`: Don't use a compiled-in pseudo RNG but the file `random.out` as input.
* `-s 1`: Rewind the input after every test. Without this, successive tests use successive parts of the input file.
* `-Y 1`: Keep testing until a definite (in probabilistic terms:-) test result is obtained.
@@ -28,6 +29,7 @@ The command line options I (bs) personally use are `dieharder -g 201 -f random.o
* `-a`: Run all tests.
Additionally, these may be useful for more targeted testing:
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* `-m <n>`: Multiply the `psamples` value by `n`; good for getting even more reliable results, at the expense of the additional data needed.
* `-d <test name/number>`: Perform a specific test.
* `-l`: List all available tests by name and number.
@@ -56,8 +58,10 @@ They generally work on blocks of 20000 bits.
### Usage
The `rngtest` program reads data from its standard input and by default returns a statistics overview when it reaches EOF. This can be changed with these two options (among others):
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* `-c <n>`: Stop running after `n` blocks.
* `-b <n>:` Give intermediate results every `n` blocks.
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Use at least one of these when running on a pipe or device...
### Interpretation of Results