Monte-Carlo examples using new features: command 'mc_source',

variable 'sim_status' etc.

examples/Monte_Carlo/MC_2_control.sp

@@ -6,7 +6,7 @@
 *
 .control
   save buf                     $ we just need output vector buf, save memory by more than 10x
-  let mc_runs = 100            $ number of runs for monte carlo
+  let mc_runs = 10             $ number of runs for monte carlo
   let run = 1                  $ number of the actual run
 
 * Where to find the circuit netlist file MC_2_circ.sp
@@ -22,7 +22,11 @@
     reset
     set run ="$&run"              $ create a variable from the vector
     set rndseed = $run            $ set the rnd seed value to the loop index
-    source MC_2_circ.sp           $ load the circuit, including model data
+    if run = 1
+       source MC_2_circ.sp        $ load the circuit once from file, including model data
+    else
+       mc_source                  $ re-load the circuit from internal storage
+    end
     tran 15p 200n 0
     write mc_ring{$run}.out buf   $ write each sim output to its own rawfile
     linearize buf                 $ lienarize buf to allow fft

examples/Monte_Carlo/MC_ring.sp

@@ -95,11 +95,22 @@ cout  buf ss 0.2pF
 * close to 8192, which would yield varying number of line length and thus scale for fft.
 *
 * We have to figure out what to do if a single simulation will not converge.
-* Is there a variable which may be set if there is no convergence?
-* Then we might skip this run and continue with a new run. It does not exist for now.
-* So we have to rely on the robustness of the following steps not leading
-* to a seg fault if the tran data are missing.
+* There is the variable 'sim_status' which is set to 1 if the simulation
+* fails with ’xx simulation(s) aborted’, e.g. because of non-convergence.
+* Then we might skip this run and continue with a new run.
 *
+    echo Simulation status $sim_status
+    let simstat = $sim_status
+    if simstat = 1
+      if run = mc_runs
+        echo go to end
+      else
+        echo go to next run
+      end
+      destroy $curplot
+      goto next
+    end
+
     set run ="$&run"              $ create a variable from the vector
     set mc_runs ="$&mc_runs"      $ create a variable from the vector
     echo simulation run no. $run of $mc_runs
@@ -136,6 +147,8 @@ cout  buf ss 0.2pF
     let maxffts[{$run}]={$dt}.fft_max
     let halfffts[{$run}]={$dt}.fft_40
     let run = run + 1
+    label next
+    reset
   end
 ***** plotting **********************************************************
   setplot $plot_out