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Simulation doesn't run without AMAP folder

zaratustra

Hi,

I have two questions related to the same simulation.

Q1) I'm trying to run a simulation in a separate folder. I created the empty netlistFooter and netlistHeader files inside a netlist folder. The problem is that the simulator always ask for an AMAP folder. So I copied an AMAP folder from another design. I need to perform more than 2k simulations with 2k different netlists, so I can't manually create more than 2k schematics in Virtuoso. I understand that this is probably a syntax issue, but I can't see where in the netlist it is saying that is a schematic netlist.

When I copied the amap folder from another design it worked but I'm not sure if the results will be correct since the signals are mapped to a different design.

Q2) I inserted an exit() at the end of the ocean script because I have to quit ocean before performing another simulation. Ocean is saying "killed by user" and at the end saying that "fatal error ..." but the simulation is performed and the waveforms are saved. Is it expected?

I call ocean like this: "ocean -nograph -restore core.il"

Please find below one of the netlists and the ocean script.

Thank you,

Raphael

Fullscreen 4667.temp.txt Download 
########## netlist_file ##########
include "etc/corners.scs"

// Library name: Cell
// Cell name: NAND2
// View name: schematic

subckt NAND2 A B Z gnd gnds vdd vdds
M5 (net023 B net247 gnds) nmos w=199.0n l=22.0n as=(76n)*(199.0n)  \
         ad=(76n)*(199.0n) ps=2*((1)*(76n)+(199.0n))  pd=2*((1)*(76n)+(199.0n)) \
        nf=(1)*(1) sb=(76n) sd=114n ptwell=1 sca=-1 scb=-1 scc=-1 \
        pre_layout_local=-1 p_la=0 lpccnr=0 covpccnr=0 ngcon=1 wrxcnr=0 \
        nsig_delvto_uo1=0 nsig_delvto_uo2=0 soa=1 swshe=0 swrg=1 \
        mismatch=1 m=1 xpos=-1 ypos=-1 plorient=1 plsnf=0 pcpastrx_top=-1 \
        pcpastrx_bot=-1 mx=1 my=1 deltax=-1 deltay=-1
M2 (net247 A gnd gnds) nmos w=199.0n l=22.0n as=(76n)*(199.0n)  \
         ad=(76n)*(199.0n) ps=2*((1)*(76n)+(199.0n))  pd=2*((1)*(76n)+(199.0n)) \
        nf=(1)*(1) sb=(76n) sd=114n ptwell=1 sca=-1 scb=-1 scc=-1 \
        pre_layout_local=-1 p_la=0 lpccnr=0 covpccnr=0 ngcon=1 wrxcnr=0 \
        nsig_delvto_uo1=0 nsig_delvto_uo2=0 soa=1 swshe=0 swrg=1 \
        mismatch=1 m=1 xpos=-1 ypos=-1 plorient=1 plsnf=0 pcpastrx_top=-1 \
        pcpastrx_bot=-1 mx=1 my=1 deltax=-1 deltay=-1
M0 (Z net023 gnd gnds) nmos w=378.0n l=22.0n as=(76n)*(378.0n)  \
         ad=(76n)*(378.0n) ps=2*((1)*(76n)+(378.0n))  pd=2*((1)*(76n)+(378.0n)) \
        nf=(1)*(1) sb=76.0n sd=114n ptwell=0 par=1 sca=-1 scb=-1 scc=-1 \
        pre_layout_local=-1 p_la=0 lpccnr=0 covpccnr=0 ngcon=1 wrxcnr=0 \
        nsig_delvto_uo1=0 nsig_delvto_uo2=0 soa=1 swshe=0 swrg=1 \
        mismatch=1 m=1 xpos=-1 ypos=-1 plorient=1 plsnf=0 pcpastrx_top=-1 \
        pcpastrx_bot=-1 mx=1 my=1 deltax=-1 deltay=-1
M4 (net023 B vdd vdds) pmos w=242.0n l=22.0n as=(76n)*(242.0n)  \
         ad=(76n)*(242.0n) ps=2*((1)*(76n)+(242.0n))  pd=2*((1)*(76n)+(242.0n)) \
        nf=(1)*(1) sb=(76n) sd=114n ptwell=0 sca=-1 scb=-1 scc=-1 \
        pre_layout_local=-1 p_la=0 lpccnr=0 covpccnr=0 ngcon=1 wrxcnr=0 \
        nsig_delvto_uo1=0 nsig_delvto_uo2=0 soa=1 swshe=0 swrg=1 \
        mismatch=1 m=1 xpos=-1 ypos=-1 plorient=1 plsnf=0 pcpastrx_top=-1 \
        pcpastrx_bot=-1 mx=1 my=1 deltax=-1 deltay=-1
M3 (net023 A vdd vdds) pmos w=242.0n l=22.0n as=(76n)*(242.0n)  \
         ad=(76n)*(242.0n) ps=2*((1)*(76n)+(242.0n))  pd=2*((1)*(76n)+(242.0n)) \
        nf=(1)*(1) sb=(76n) sd=114n ptwell=0 sca=-1 scb=-1 scc=-1 \
        pre_layout_local=-1 p_la=0 lpccnr=0 covpccnr=0 ngcon=1 wrxcnr=0 \
        nsig_delvto_uo1=0 nsig_delvto_uo2=0 soa=1 swshe=0 swrg=1 \
        mismatch=1 m=1 xpos=-1 ypos=-1 plorient=1 plsnf=0 pcpastrx_top=-1 \
        pcpastrx_bot=-1 mx=1 my=1 deltax=-1 deltay=-1
M1 (Z net023 vdd vdds) pmos w=538.0n l=22.0n as=(76n)*(538.0n)  \
         ad=(76n)*(538.0n) ps=2*((1)*(76n)+(538.0n))  pd=2*((1)*(76n)+(538.0n)) \
        nf=(1)*(1) sb=76.0n sd=114n ptwell=0 par=1 sca=-1 scb=-1 scc=-1 \
        pre_layout_local=-1 p_la=0 lpccnr=0 covpccnr=0 ngcon=1 wrxcnr=0 \
        nsig_delvto_uo1=0 nsig_delvto_uo2=0 soa=1 swshe=0 swrg=1 \
        mismatch=1 m=1 xpos=-1 ypos=-1 plorient=1 plsnf=0 pcpastrx_top=-1 \
        pcpastrx_bot=-1 mx=1 my=1 deltax=-1 deltay=-1
ends NAND2
// End of subcircuit definition.

V0 (vdd! 0) vsource dc=1 type=dc
V1 (vdds! 0) vsource dc=1 type=dc
V2 (gnds! 0) vsource dc=0 type=dc
C0 (Z 0) capacitor c=1f
I0 (gnds! gnds! Z 0 gnds! vdd! vdds!) NAND2


########## core.il ##########
paths_file_folder = "etc/simulator_spectre/" 
electrical_simulation_path = "etc/simulations/" 
cell_name = "NAND2" 
modelFile_path = '("etc/corners.scs" "") 
path_psf = strcat(electrical_simulation_path cell_name "/spectre/schematic") 
path_netlist = strcat(electrical_simulation_path cell_name "/spectre/schematic/netlist/netlist") 
time_hit = 1.8e-08 
outputstart_electrical_sim = "1e-08" 
stop_electrical_sim = "3e-08" 
temperature = 25 
vdd_core = 1.0 
results_wvspt_folder = "etc/waveform/" 
load strcat(paths_file_folder "simulation_options.il") 
load strcat(paths_file_folder "run_simulation.il") 
exit() 


########## simulation_options.il ##########
simulator( 'spectre )
design(	 path_netlist )
resultsDir( path_psf )
modelFile( modelFile_path )
analysis('tran ?outputstart outputstart_electrical_sim ?stop stop_electrical_sim ?skipdc "yes")

envOption(
        'cmd64bit  t 
	'analysisOrder  list("tran") 
)
option( 'dochecklimit "no"
)

temp( temperature )

saveOption( ?simOutputFormat "psf" )
saveOption( 'currents "none" )
saveOption( 'save "selected") 


########## run_simulation.il ##########
run()

;Open results from psf
openResults(path_psf)

;Select transient results, only voltage in this case
all_signals_v = outputs(?result "tran" ?resultsDir path_psf)

;Save operations in the specified file
symmaryFile=outfile(strcat(results_wvspt_folder "all_signals_voltages") "w")

foreach(cell_name all_signals_v
  cell_voltage=value(v(cell_name ?result "tran") time_hit)
  when(cell_voltage
    fprintf(symmaryFile "%s %g \n" cell_name cell_voltage)
  )
)

close(symmaryFile)

Parents

  • I can't see why spectre would care about the amap directory (I'd be extremely surprised if it did). Maybe the OCEAN script would but even then I'd expect the outputs() function to return the unmapped names if there's no amap directory (that's certainly what it does when I tried it).

    So, which IC subversion are you using (you can use getVersion(t) to report that) and which spectre version? What exactly is the error you get?

    The issue with the "killed by user" and "fatal error" is not a problem - it's because in OCEAN by default it launches spectre in "interactive" mode which means that the simulator doesn't exit so that it can efficiently re-run if  you just change a desVar() and do run() again. If you call ocnCloseSession() before the call to exit() it will exit the simulator gracefully and prevent this message.

    Regards,

    Andrew.

Reply

  • I can't see why spectre would care about the amap directory (I'd be extremely surprised if it did). Maybe the OCEAN script would but even then I'd expect the outputs() function to return the unmapped names if there's no amap directory (that's certainly what it does when I tried it).

    So, which IC subversion are you using (you can use getVersion(t) to report that) and which spectre version? What exactly is the error you get?

    The issue with the "killed by user" and "fatal error" is not a problem - it's because in OCEAN by default it launches spectre in "interactive" mode which means that the simulator doesn't exit so that it can efficiently re-run if  you just change a desVar() and do run() again. If you call ocnCloseSession() before the call to exit() it will exit the simulator gracefully and prevent this message.

    Regards,

    Andrew.

Children
  • in reply to Andrew Beckett

    Hi Andrew,

    Thank you for your time. The ocnCloseSession() did the trick.

    Regarding Q1 Here is some additional information:

    Under Virtuoso CIW: getVersion(t) = "sub-version IC6.1.7-64b.500.15 "

    Spectre (R) Circuit Simulator - Version 18.1.0.077 64bit -- 1 Aug 2018

    I arrived today at work, closed everything (Virtuoso etc), removed all amap folders, added the ocnCloseSession() and now everything is running smoothly. I did absolutely nothing besides that and I can't repeat the amap folder error. So now is running without the amap folder. Maybe there was something in the environment because I did simulate before using Virtuoso (so using amap), by closing everything and sourcing the environment again solved the problem.

    Thank you for you support.

    Have a great day,

    Raphael

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