ns3-dctcp.sh: add comment

experiments/pyexps/ns3-dctcp.sh

 #!/bin/bash
 
+##### build dctcp-modes.cc example in ns-3
+##### cp cp examples/tcp/dctcp-modes.cc scratch/dctcp-modes.cc
+##### ./waf
+
+##### ./ns3-dctcp.sh [num_core] 
+
+
 EHSIM_BASE="$(readlink -f $(dirname ${BASH_SOURCE[0]})/../..)"
 NS3_BASE="$EHSIM_BASE/ns-3"
+OUTDIR_BASE="$EHSIM_BASE/experiments/pyexps"
 
 cd $NS3_BASE
-mtu=1500
 k_start=0
-k_end=199680
-#k_end=0
+#k_end=199680
+k_end=0
 k_step=8320
+#mtus="1500 4000 9000"
+mtus="1500"
 cores=$1
 
 echo $cores
@@ -16,13 +25,15 @@ echo $cores
 proc=0
 pids=""
 
-for k in $(seq $k_start $k_step $k_end)
+#for k in $(seq $k_start $k_step $k_end)
+for m in $mtus
 do
     #echo $k
-    for m in 1500 4000 9000 # MTU size
+    #for m in 1500 4000 9000 # MTU size
+    for k in $(seq $k_start $k_step $k_end)
     do
-        echo "K: $k  MtU: $m"
-        ./cosim-dctcp-run.sh $k $m &
+        echo "MtU: $m  K: $k  "
+        ./cosim-dctcp-run.sh $k $m 
         pid=$!
         pids="$pids $pid"
         proc=$(($proc + 1))
@@ -38,11 +49,6 @@ do
     done
 done
 
-for p in $pids; do
-    wait $p
-done
-
-
 
 cleanup() {
     echo Cleaning up