Add initial support for Nginx

configs/nginx.sh

+NGINX=/opt/nginx/sbin/nginx
+NGINX_FSTACK=/opt/nginx_fstack/sbin/nginx
+NGINX_CLIENT=tilly02
+NGINX_HOST=192.168.199.1

experiments/nginx.shared.sh

+source "$EXP_ROOT/experiments/extra.shared.sh"
+
+load_config() {
+    source "$EXP_ROOT/configs/nginx.sh"
+}
+
+nginx_pre_start() {
+    load_config
+
+    if [ "$CALADAN" == "true" ]; then
+        echo "No Nginx port for Caladan :/"
+        exit 1
+    elif [ "$FSTACK" == "true" ]; then
+        NGINX="$NGINX_FSTACK"
+    fi
+
+    NGINX_TMP_PREFIX="$(mktemp -d -p /tmp)"
+    cp "$EXP_ROOT/nginx.conf" "$NGINX_TMP_PREFIX"
+    cp "$EXP_ROOT/f-stack.conf" "$NGINX_TMP_PREFIX"
+
+    sed -i "s/{threads}/$THREADS/g" "$NGINX_TMP_PREFIX/nginx.conf"
+    sed -i "s/lcore_mask=1/lcore_mask=0x$(printf '%x' $((2 ** THREADS - 1)))/g" "$NGINX_TMP_PREFIX/f-stack.conf"
+
+    if [ "$FSTACK" == "true" ]; then
+        sed -i "s/#{fstack_only}#//g" "$NGINX_TMP_PREFIX/nginx.conf"
+    fi
+
+    EXPERIMENT_NAME_EXT="t$THREADS"
+}
+
+nginx_start() {
+    pkill -INT nginx || true
+    echo "taskset -c $FIRST_CPU-$((FIRST_CPU + THREADS - 1 - THREAD_TAIL_OFFSET)) $NGINX -c \"$NGINX_TMP_PREFIX/nginx.conf\""
+    taskset -c $FIRST_CPU-$((FIRST_CPU + THREADS - 1 - THREAD_TAIL_OFFSET)) $NGINX -c "$NGINX_TMP_PREFIX/nginx.conf" &
+    NGINX_PID=$!
+    sleep 60
+}
+
+nginx_warmup() {
+    echo "Warming up Nginx..."
+    sudo -u $SSH_USER ssh $NGINX_CLIENT wrk --latency --timeout 1m --duration 1m --threads 8 -c 1000 http://$NGINX_HOST/plaintext
+}
+
+nginx_bench() {
+    echo "Benchmarking Nginx with $1 connections"
+    perf_stat_start "$1"
+    sudo -u $SSH_USER ssh $NGINX_CLIENT wrk --latency --timeout 1m --duration 1m --threads 8 -c $1 http://$NGINX_HOST/plaintext | tee "$DATA_OUT/$1.txt"
+    perf_stat_stop
+}
+
+nginx_stop() {
+    pkill -INT "$NGINX_PID" || true
+    rm -rf "$NGINX_TMP_PREFIX" || true
+}

experiments/nginx_single_run.sh

+source "$EXP_ROOT/experiments/nginx.shared.sh"
+
+pre_start() {
+    nginx_pre_start
+}
+
+run_exp() {
+    nginx_start
+    nginx_warmup
+    nginx_bench 10000
+    nginx_stop
+}
+
+post_start() {
+    nginx_stop
+}

nginx.conf

+user  root;
+worker_processes {threads};
+daemon off;
+
+#error_log  logs/error.log;
+#error_log  logs/error.log  notice;
+#error_log  logs/error.log  info;
+
+#pid        logs/nginx.pid;
+
+# path of f-stack configuration file
+#{fstack_only}# fstack_conf f-stack.conf;
+
+events {
+    worker_connections  102400;
+    #{fstack_only}# use kqueue;
+    multi_accept on;
+}
+
+
+http {
+    default_type  text/plain;
+
+    sendfile        off;
+
+    keepalive_timeout  65;
+
+    #gzip  on;
+
+    server {
+        listen       80 backlog=4096;
+        server_name  localhost default_server;
+
+        access_log off;
+        gzip off;
+        sendfile off;
+        tcp_nopush off;
+        tcp_nodelay off;
+
+        location /plaintext {
+            return 200 "Hello, world!";
+        }
+    }
+}