Probabilistic distribution across simulator calls

SystemVerilog
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1

Consider that we have a random variable in a class with a given distribution. We know that across N number of randomize() calls, a simulator is expected to yield the probabilistic distribution as described by the constraint. However, what happens if we do ONE randomize() call per-run and measure distribution across N runs with random seeds? Is there any guarantee at all that the distribution will be honored?


class dist_class;
  rand int m_var;  
  constraint dist_c { m_var dist { [0:9] := 10 }; }                 
endclass

I know that my question may be simulator-specific and simulator-seed dependent. For the purposes of this question, let us at least assume that across N runs, the simulator SV seed is uniformly distributed across the whole range of seeds.

2

In reply to ukhanna:

Yes, assuming there are no other constraint on the variable, generating a random number multiple times in the same test will have effectively the same distribution as generating one random number in multiple tests.