add ns-3 dctcp experiment run script

experiments/pyexps/ns3-dctcp.sh

+#!/bin/bash
+
+EHSIM_BASE="$(readlink -f $(dirname ${BASH_SOURCE[0]})/../..)"
+NS3_BASE="$EHSIM_BASE/ns-3"
+
+cd $NS3_BASE
+mtu=1500
+k_start=0
+k_end=199680
+#k_end=0
+k_step=8320
+cores=$1
+
+echo $cores
+
+proc=0
+pids=""
+
+for k in $(seq $k_start $k_step $k_end)
+do
+    #echo $k
+    for m in 1500 4000 9000 # MTU size
+    do
+        echo "K: $k  MtU: $m"
+        ./cosim-dctcp-run.sh $k $m &
+        pid=$!
+        pids="$pids $pid"
+        proc=$(($proc + 1))
+        
+        if [ $proc -eq $cores ]; then
+            for p in $pids; do
+                wait $p
+            done
+            proc=0
+            pids=""
+
+        fi
+    done
+done
+
+for p in $pids; do
+    wait $p
+done
+
+
+
+cleanup() {
+    echo Cleaning up
+    for p in $pids ; do
+        kill $p &>/dev/null
+    done
+
+    sleep 1
+    for p in $pids ; do
+        kill -KILL $p &>/dev/null
+    done
+
+}
+
+sighandler() {
+    echo "Caught Interrupt, aborting...."
+    cleanup
+    exit 1
+}
+
+trap "sighandler" SIGINT