Update perf stats, and workaround connection establishment delay with F-Stack

autorun.sh

@@ -54,6 +54,10 @@ case "$(uname -r)" in
 
         MIN_THREADS=2 run_memcached_conn_scan --caladan
         MIN_THREADS=2 run_memcached_qps_scan --caladan
+
+        # Extra experiments for Caladan
+        run_exp -e memcached_conn_scan --caladan -t 4
+        run_exp -e memcached_conn_scan --caladan -t 6
         ;;
     *)
         echo "Unsupported kernel"

experiments/memcached.shared.sh

@@ -66,6 +66,7 @@ memcached_pre_start() {
 
     if [ "$FSTACK" == "true" ]; then
         MEMCACHED="$MEMCACHED_FSTACK"
+        PERF_EXTRA_ARGS="-D 15000" # Account for S-Stack connection establishment delay
     elif [ "$CALADAN" == "true" ]; then
         MEMCACHED="$MEMCACHED_CALADAN"
         MEMCACHED_ARGS="$MEMCACHED_ARGS $CALADAN_CONFIG -p 11211"

experiments/perf.shared.sh

 perf_stat_start() {
-    $PERF stat -C 0-$((THREADS - 1)) -e LLC-load-misses:u,LLC-load-misses:k,LLC-loads:u,LLC-loads:k,LLC-store-misses:u,LLC-store-misses:k,LLC-stores:u,LLC-stores:k,task-clock,cycles:u,cycles:k,instructions:u,instructions:k -o "$DATA_OUT/stat_$1$EXP_AUX_SUFFIX.txt" &
+    $PERF stat $PERF_EXTRA_ARGS -C 0-$((THREADS - 1)) -e LLC-load-misses:u,LLC-load-misses:k,LLC-loads:u,LLC-loads:k,LLC-store-misses:u,LLC-store-misses:k,LLC-stores:u,LLC-stores:k,task-clock,cycles:u,cycles:k,instructions:u,instructions:k -o "$DATA_OUT/stat_$1$EXP_AUX_SUFFIX.txt" &
     PERF_STAT_PID=$!
 }