[benchmark] Do three runs

bin/run-benchmark.sh

@@ -2,16 +2,17 @@
 
 set -x
 
-if [ $# -ne 2 ]; then
-    echo "$0 host ip"
+if [ $# -ne 3 ]; then
+    echo "$0 prefix host ip"
     echo "host and ip of the iperf server"
 fi
 
+prefix=$1; shift
 host=$1; shift
 port=$1; shift
 
 flags="-c ${host} -p $port -O 10 -t 190"
-fbase="iperf"
+fbase="iperf-${prefix}"
 
 if echo $host | grep -q ':'; then
     flags="$flags -6"
@@ -25,10 +26,11 @@ do_benchmark()
 {
     full_flags="$@"
     iperf3_flags=$(echo $full_flags | sed 's/ //g')
-    filename="${fbase}-${iperf3_flags}"
-
-    iperf3 $full_flags | tee "${filename}"
 
+    for run in 1 2 3; do
+        filename="${fbase}${iperf3_flags}-run${run}"
+        iperf3 $full_flags | tee "${filename}"
+    done
 }
 
 for p in 1 10 20 50; do