OVM build in sequences :
OVM provides built-in three build in sequences. In addition to user-defined sequences. All of them are derived from ovm_sequence. Default_sequence in ovm is ovm_random_sequence. ovm_exhaustive_sequence randomly cycles through the whole sequence associative array without selecting a duplicate.
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index
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Name
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Description
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[0]
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ovm_random_sequence
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executes a random number of sequences (does not call itself)
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[1]
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ovm_exhaustive_sequence
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executes each sequence until all are done (except random and simple)
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[2]
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ovm_simple_sequence
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executes a single data transaction
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If we want to run any user defined custom sequence we need to set the ovm_default_sequence property of the sequence to the sequence we want to run. something like this in your ovm_test
- set_config_string("mem_tb_inst0.m_env0.m_sequencer", "default_sequence", "mem_write_read_bitflip_seq");
if you dont set or change the default sequence in your testcase by default it will run the ovm_random_sequence.
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