refactor: Replaced rt-tests installation from source with Debian package

Author: 2b-t

docker/Dockerfile

@@ -10,7 +10,6 @@ ARG DEBIAN_FRONTEND=noninteractive
 # Dependencies for latency plot
 RUN apt-get update && apt-get install -y \
     curl \
-    grep \
     build-essential \
     make \
     libnuma-dev \
@@ -23,19 +22,12 @@ RUN apt-get update && apt-get install -y \
     dialog \
     tmux
 
-# Fetch most recent version of rt-tests and mklatencyplot
-RUN cd ${WS_DIR} \
- && RT_TESTS=$(echo $(curl -Ls https://mirrors.edge.kernel.org/pub/linux/utils/rt-tests | grep -o -P '(?<=href\=\")(rt-tests-2.*)(?=.tar.xz\">)')) \
- && curl -SLO --fail https://mirrors.edge.kernel.org/pub/linux/utils/rt-tests/${RT_TESTS}.tar.xz \
- && tar -xf ${RT_TESTS}.tar.xz \
- && cd ${RT_TESTS} \
- && make \
- && make install \
- && cd .. \
- && rm -r ${RT_TESTS} \
- && rm ${RT_TESTS}.tar.xz \
+# Cyclictest and mklatencyplot
+RUN apt-get update && apt-get install -y \
+    rt-tests \
+ && cd ${WS_DIR} \
  && curl -SLO --fail https://www.osadl.org/uploads/media/mklatencyplot.bash \
-# && sed -i -E "s/(cores=).*/\1\$(nproc)/" ${WS_DIR}/mklatencyplot.bash \
+ && sed -i -E "s/(cores=).*/\1\$(nproc)/" mklatencyplot.bash \
  && chmod +x mklatencyplot.bash
 
 ARG DEBIAN_FRONTEND=dialog