Cadence recordvars with Synopsys VCS?

[Carl W.]

I've been unsuccessful in getting Cadence's recordvars PLI
to work with Synopsys VCS, possibly because I'm doing a very large
gate sim in VCS and recordvars apparently tries to allocate memory
for every node in the sim, not just the ones I want to output. I'm
using the "depth=1" option on the top level module, which isn't
that many nets, but it fails with a message about running out of
memory with 'new'.

What's the best way to create a compressed dumpfile similar
to Cadence's SST2 format in VCS?

Thanks,
Carl

 

[Petter Gustad]

"Carl W." <NoEmail@hp.com> writes:

I've been unsuccessful in getting Cadence's recordvars PLI
to work with Synopsys VCS, possibly because I'm doing a very large
gate sim in VCS and recordvars apparently tries to allocate memory
for every node in the sim, not just the ones I want to output. I'm
using the "depth=1" option on the top level module, which isn't
that many nets, but it fails with a message about running out of
memory with 'new'.

What's the best way to create a compressed dumpfile similar
to Cadence's SST2 format in VCS?

I have never noticed that it allocates memory for all nets (have you
got this confirmed from Cadence?), but I guess "very large" is
probably bigger than most of my gate level sims. This is what I
usually do:

$recordsetup("design=testbench","version=1","run=1","compress");
$recordvars("depth=1",testbench.top.core.whatever);

Petter
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