spectre mc simulation : how to gain disk space (option save=selected/none...) but keeping the post-processing possible.

 Hello,

I would like to reduce the disk area needed for a spectre simulation (example of a monte-carlo (transient) run 842 (cf. below)).

Command launched : spectre input.scs +log mc_log_file.log

Inside the input.scs, I can, indeed, decide to save or not some selected data => saveOptions options save=selected subcktprobelvl=2

If I do that, I can do my post-processing exports (example : export out_b_sensed=oceanEval("value(v(\"out_b\" ?result \"tran\") 2e-08)")), however, it takes much disk area than with the save=none option : 456 kBytes vs 216 kBytes

If I decide to put save=none, I reduce the disk area but, the post-processing is impossible =>

Error found by spectre during Monte Carlo analysis `mc1'.

    ERROR (SPECTRE-8003): mc1_subckts: Error evaluating ocean expression `saout_b_sensed=value(v("saout_b" ?result "tran") 2e-08)'.

Do we have a way to reduce the disk area with keeping the possibility to do the post-processing ?

Summary below :

1/ with (inside the input.scs) : saveOptions options save=selected subcktprobelvl=2

The biggest file is : 

249916 Jul 25 12:31 input.raw/mc1_tran.tran  => size of 250 kBytes

...> du -sh ../842/

456K    ../842/

...> du -sh ./*

4.0K    ./cp_input.scs

0       ./du

356K    ./input.raw

4.0K    ./input.scs

4.0K    ./input.scs~

12K     ./mc_log_file.log

52K     ./monteCarlo

92K     ./pp238496.out

4.0K    ./spectre.fc

4.0K    ./spectre.ic

...> ls -lrt input.raw/*

504 Jul 25 12:31 input.raw/mc1.mcparam

249916 Jul 25 12:31 input.raw/mc1_tran.tran

5376 Jul 25 12:31 input.raw/mc1_finalTimeOP.info

684 Jul 25 12:31 input.raw/mc1_modelParameter.info

13152 Jul 25 12:31 input.raw/mc1_element.info

1484 Jul 25 12:31 input.raw/mc1_outputParameter.info

4647 Jul 25 12:31 input.raw/mc1_designParamVals.info

5264 Jul 25 12:31 input.raw/mc1_primitives.info.primitives

523 Jul 25 12:31 input.raw/mc1_subckts.info.subckts

1156 Jul 25 12:31 input.raw/logFile.tmp

2140 Jul 25 12:31 input.raw/mc1_tran.montecarlo

2148 Jul 25 12:31 input.raw/mc1_finalTimeOP.montecarlo

2152 Jul 25 12:31 input.raw/mc1_modelParameter.montecarlo

2144 Jul 25 12:31 input.raw/mc1_element.montecarlo

2152 Jul 25 12:31 input.raw/mc1_outputParameter.montecarlo

2152 Jul 25 12:31 input.raw/mc1_designParamVals.montecarlo

2148 Jul 25 12:31 input.raw/mc1_primitives.montecarlo

2144 Jul 25 12:31 input.raw/mc1_subckts.montecarlo

3275 Jul 25 12:31 input.raw/logFile

382 Jul 25 12:31 input.raw/artil.log

2/ with : saveOptions options save=none subcktprobelvl=2

...> du -sh ../842/

216K    ../842/

...> du -sh ./*

4.0K    ./cp_input.scs

116K    ./input.raw

4.0K    ./input.scs

4.0K    ./input.scs~

12K     ./mc_log_file.log

52K     ./monteCarlo

12K     ./pp238496.out

4.0K    ./spectre.fc

4.0K    ./spectre.ic

...> ls -lrt input.raw/

504 Jul 25 12:02 mc1.mcparam

12348 Jul 25 12:02 mc1_tran.tran

2468 Jul 25 12:02 mc1_finalTimeOP.info

684 Jul 25 12:02 mc1_modelParameter.info

13152 Jul 25 12:02 mc1_element.info

1484 Jul 25 12:02 mc1_outputParameter.info

4647 Jul 25 12:02 mc1_designParamVals.info

5212 Jul 25 12:02 mc1_primitives.info.primitives

523 Jul 25 12:02 mc1_subckts.info.subckts

1156 Jul 25 12:02 logFile.tmp

2140 Jul 25 12:02 mc1_tran.montecarlo

2148 Jul 25 12:02 mc1_finalTimeOP.montecarlo

2152 Jul 25 12:02 mc1_modelParameter.montecarlo

2144 Jul 25 12:02 mc1_element.montecarlo

2152 Jul 25 12:02 mc1_outputParameter.montecarlo

2152 Jul 25 12:02 mc1_designParamVals.montecarlo

2148 Jul 25 12:02 mc1_primitives.montecarlo

2144 Jul 25 12:02 mc1_subckts.montecarlo

3275 Jul 25 12:02 logFile

1331 Jul 25 12:02 artil.log

input.scs (extract) :

simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=70  tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5  digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output"  checklimitdest=psf

mc1 montecarlo numruns=1 seed=12345 variations=mismatch sampling=standard  donominal=no scalarfile="../monteCarlo/mcdata" savemismatchparams=yes  mismatchparamfile="../monteCarlo/mismatchparam" mismatchscalarfile="../monteCarlo/mismatchdata"  savefamilyplots=no savedatainseparatedir=yes  firstrun=842 {

tran tran stop=20n write="spectre.ic" writefinal="spectre.fc"  annotate=status maxiters=5

finalTimeOP info what=oppoint where=rawfile

modelParameter info what=models where=rawfile

element info what=inst where=rawfile

outputParameter info what=output where=rawfile

designParamVals info what=parameters where=rawfile

primitives info what=primitives where=rawfile

subckts info what=subckts  where=rawfile

export out_b_sensed=oceanEval("value(v(\"out_b\" ?result \"tran\") 2e-08)")

...

}

mcOptions options genmcdep=yes

saveOptions options save=none subcktprobelvl=2

log :

Error found by spectre during Monte Carlo analysis `mc1'.

    ERROR (SPECTRE-8003): mc1_subckts: Error evaluating ocean expression `out_b_sensed=value(v("out_b" ?result "tran") 2e-08)'.