What distribution is good for verification seeds?

[luoyanghero]

The richer verification seeds, the wider random configs, and the more fully verified.
For example, the seed range is 1--10000, and 1000 seeds are generated. What distribution is good for the 1000 seeds?

 

[dave_59]

For a good tool, the seed should not matter. Seeds 0-999 would produce an equivalent distribution. However the seeds for $random in Verilog which is standardized across all simulation tools is known to generate poor distributions.

A better option is using a random number generator that incorporates the system time to generate the seeds. That way you are more likely to use all 10000 seeds eventually. SystemVerilog simulators can do this automatically for you when using $urandom.