User guide

21-37
OpenVera Native Testbench
Runtime Options
-cg_coverage_control
The coverage_control() system task (see the OpenVera LRM:
Native Testbench for description of this task), coupled with the
-cg_coverage_control runtime argument, provides a
single-point mechanism for enabling/disabling the coverage
collection for all coverage groups or a particular coverage group.
Syntax:
-cg_coverage_control=value
The values for -cg_coverage_control are 0 and 1. A value
of “0” disables coverage collection, and a value of “1” enables
coverage collection.
For an example, see “Controlling Coverage Collection Globally”
on page 21-51.
+ntb_cache_dir
Specifies the directory location of the cache that VCS-NTB
maintains as an internal disk cache for randomization:
% simv +ntb_cache_dir=/u/myself/tmp_cache...
This cache improves performance and reduces memory use by
reusing randomization problem data from previous runs. The
default cache is called “.__solver_cache__” in the current
working directory.
You can remove the contents of the cache at any time, except
when VCS is running.