LTTng logger (CTF)

This commit introduces LTTng logging mechanism which is an open source
tracing tool.

URL: https://lttng.org/

cmake_targets/build_oai

@@ -124,6 +124,8 @@ Options:
 --disable-cpu-affinity
    Disables CPU Affinity between UHD/TX/RX Threads (Valid only when deadline scheduler is disabled). By defaulT, CPU Affinity is enabled when not using deadline scheduler. It is enabled only with >2 CPUs. For eNB, CPU_0-> Device library (UHD), CPU_1->TX Threads, CPU_2...CPU_MAX->Rx Threads. For UE, CPU_0->Device Library(UHD), CPU_1..CPU_MAX -> All the UE threads
 --enable-cpu-affinity
+--enable-LTTNG
+   Enable LTTNG log. While lttng is enabled, T-Tracer will be disabled
 --disable-T-Tracer
    Disables the T tracer.
 --disable-hardware-dependency
@@ -353,6 +355,11 @@ function main() {
            BUILD_DOXYGEN=1
            echo_info "Will build doxygen support"
            shift;;     
+       --enable-LTTNG)
+            CMAKE_CMD="$CMAKE_CMD -DENABLE_LTTNG=ON -DT_TRACER=OFF"
+            echo_info "Enable LTTNG tracer"
+            USE_LTTNG=1
+            shift 1;;
        --disable-T-Tracer)
             CMAKE_CMD="$CMAKE_CMD -DT_TRACER=False"
             echo_info "Disabling the T tracer"
@@ -454,6 +461,10 @@ function main() {
   if [ "$INSTALL_EXTERNAL" = "1" ] ; then
     echo_info "Installing packages"
     check_install_oai_software
+    if [ "$USE_LTTNG" = "1" ] ; then
+      echo_info "installing LTTng"
+      install_lttng $1
+    fi
     if [ "$HW" == "OAI_USRP" ] ; then
       echo_info "installing packages for USRP support"
       check_install_usrp_uhd_driver

cmake_targets/tools/build_helper

@@ -704,6 +704,97 @@ install_simde_from_source(){
     $SUDO \cp -rv ../simde /usr/include
 }
 
+install_lttng() {
+    if [[ "$OS_DISTRO" != "ubuntu" ]]; then
+      echo_info "LTTng is supported only for ubuntu at the moment."
+      echo_info $distribution
+      return
+    fi
+
+    set +e
+    $SUDO apt-add-repository ppa:lttng/stable-2.13 -y && apt-get update
+    $SUDO apt-get install -y lttng-tools lttng-modules-dkms liblttng-ust-dev
+    if [[ $? > 0 ]]; then
+      echo "Failed to install LTTng using apt. Installing from source"
+      install_lttng_deps
+      install_lttng_from_source
+    fi
+    set -e
+}
+
+install_lttng_deps() {
+  echo "installing dependencies of LTTng"
+  $SUDO apt-get install uuid-dev libxml2-dev -y
+}
+
+install_lttng_from_source() {
+    echo "installing LTTng from source"
+    install_popt_1_18_from_source
+    install_userspace_rcu
+    install_lttng_ust_2_13_from_source
+    install_lttng_tools_2_13_from_source
+}
+
+install_popt_1_18_from_source() {
+  $SUDO $INSTALLER -y install wget
+  echo_info "\nInstalling popt_1_18."
+  cd $(mktemp -d) &&
+  wget http://ftp.rpm.org/popt/releases/popt-1.x/popt-1.18.tar.gz
+  tar -xf popt-1.18.tar.gz && cd popt-1.18
+  ./configure && make -j16 && $SUDO make install
+}
+
+install_userspace_rcu() {
+    echo_info "\nInstalling U-RCU from source."
+    cd /tmp
+    $SUDO rm -rf /tmp/urcu
+    git clone https://github.com/urcu/userspace-rcu.git /tmp/urcu
+    cd /tmp/urcu
+    git checkout stable-0.12
+    ./bootstrap && ./configure && make
+    $SUDO make install
+    $SUDO ldconfig
+}
+
+
+install_lttng_modules_2_13_from_source() {
+    $SUDO $INSTALLER -y install wget
+    echo_info "\nInstalling LTTng Modules."
+    cd $(mktemp -d) &&
+    wget https://lttng.org/files/lttng-modules/lttng-modules-latest-2.13.tar.bz2 &&
+    tar -xf lttng-modules-latest-2.13.tar.bz2 &&
+    cd lttng-modules-2.13.* &&
+    make &&
+    $SUDO make modules_install &&
+    $SUDO depmod -a
+}
+
+install_lttng_ust_2_13_from_source() {
+    $SUDO $INSTALLER -y install wget
+    echo_info "\nInstalling LTTng UST."
+    cd $(mktemp -d) &&
+    wget https://lttng.org/files/lttng-ust/lttng-ust-latest-2.13.tar.bz2 &&
+    tar -xf lttng-ust-latest-2.13.tar.bz2 &&
+    cd lttng-ust-2.13.* &&
+    ./configure --disable-numa &&
+    make &&
+    $SUDO make install &&
+    $SUDO ldconfig
+}
+
+install_lttng_tools_2_13_from_source() {
+    $SUDO $INSTALLER -y install wget
+    echo_info "\nInstalling LTTng Tools."
+    cd $(mktemp -d) &&
+    wget https://lttng.org/files/lttng-tools/lttng-tools-latest-2.13.tar.bz2 &&
+    tar -xf lttng-tools-latest-2.13.tar.bz2 &&
+    cd lttng-tools-2.13.* &&
+    ./configure &&
+    make &&
+    $SUDO make install &&
+    $SUDO ldconfig
+}
+
 #################################################
 # 2. compile
 ################################################