Add iperf2 demo

.github/workflows/demo_test.yml

@@ -707,6 +707,31 @@ jobs:
       run: docker exec ${{ github.job }} bash -c "cd /root/occlum/demos/python/flask;
             curl --cacert flask.crt -X GET https://localhost:4996/customer/1"
 
+  iperf2_test:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v1
+      with:
+        submodules: true
+
+    - uses: ./.github/workflows/composite_action/sim
+      with:
+        container-name: ${{ github.job }}
+        build-envs: 'OCCLUM_RELEASE_BUILD=1'
+
+    - name: Build iperf2
+      run: docker exec ${{ github.job }} bash -c "cd /root/occlum/demos/iperf2; SGX_MODE=SIM ./build.sh"
+
+    - name: Start iperf2 server
+      run: docker exec ${{ github.job }} bash -c "cd /root/occlum/demos/iperf2/occlum_server;
+            occlum run /bin/iperf -s -p 6888 &"
+
+    - name: Start iperf2 client
+      run: |
+        sleep ${{ 5 }};
+        docker exec ${{ github.job }} bash -c "cd /root/occlum/demos/iperf2/occlum_client;
+            occlum run /bin/iperf -c 127.0.0.1 -p 6888 -P 16"
+
   Linux_LTP_test:
     runs-on: ubuntu-20.04
     steps:

demos/iperf2/README.md

@@ -0,0 +1,28 @@
+# Run iperf2 on Occlum
+
+[`Iperf2`](https://sourceforge.net/projects/iperf2/) is a popular tool for measuring Internet bandwidth performance. 
+
+### Build 
+```
+./build.sh
+```
+
+If everything goes well, it generates two occlum instances.
+```
+occlum_server
+occlum_client
+```
+
+### Run the test
+
+* Start the iperf2 server
+```
+cd occlum_server
+occlum run /bin/iperf -s -p 6888
+```
+
+* Start the iperf2 client with 16 threads
+```
+cd occlum_client
+occlum run /bin/iperf -c 127.0.0.1 -p 6888 -P 16
+```

demos/iperf2/build.sh

@@ -0,0 +1,38 @@
+#! /bin/bash
+set -e
+
+script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}"  )" >/dev/null 2>&1 && pwd )"
+
+export IPERF_INSTALL_DIR=${script_dir}/iperf2-install
+
+function dl_and_build_iperf()
+{
+    rm -rf iperf2-*
+    rm -rf ${IPERF_INSTALL_DIR}
+    mkdir -p ${IPERF_INSTALL_DIR}
+    git clone https://git.code.sf.net/p/iperf2/code iperf2-code
+    pushd iperf2-code
+    ./configure
+    make install exec_prefix=${IPERF_INSTALL_DIR}
+    popd
+}
+
+function build_occlum_instance()
+{
+    name=$1
+    rm -rf ${name}
+    occlum new ${name}
+    pushd ${name}
+    copy_bom -f ../iperf2.yaml --root image --include-dir /opt/occlum/etc/template
+
+    new_json="$(jq '.resource_limits.user_space_size = "1000MB" |
+                .resource_limits.max_num_of_threads = 64 ' Occlum.json)" && \
+    echo "${new_json}" > Occlum.json
+
+    occlum build
+    popd
+}
+
+dl_and_build_iperf
+build_occlum_instance occlum_server
+build_occlum_instance occlum_client

demos/iperf2/iperf2.yaml

@@ -0,0 +1,9 @@
+includes:
+  - base.yaml
+# bash
+targets:
+  # copy iperf
+  - target: /bin
+    copy:
+      - files:
+        - ${IPERF_INSTALL_DIR}/bin/iperf