signaltest: Add background command

Start a background process to create load on the system while running
the test.

Signed-off-by: Daniel Wagner <wagi@monom.org>

2 files changed, 12 insertions, 4 deletions

diff --git a/automated/linux/signaltest/signaltest.sh b/automated/linux/signaltest/signaltest.sh
index 41b6181..1ac2e0c 100755
--- a/automated/linux/signaltest/signaltest.sh
+++ b/automated/linux/signaltest/signaltest.sh
@@ -12,18 +12,20 @@ PRIORITY="98"
 THREADS="2"
 MAX_LATENCY="100"
 DURATION="1m"
+BACKGROUND_CMD=""
 
 usage() {
-    echo "Usage: $0 [-r runtime] [-p priority] [-t threads] [-m latency]" 1>&2
+    echo "Usage: $0 [-r runtime] [-p priority] [-t threads] [-m latency] [-w background_cmd]" 1>&2
     exit 1
 }
 
-while getopts ":p:t:D:m:" opt; do
+while getopts ":p:t:D:m:w:" opt; do
     case "${opt}" in
         p) PRIORITY="${OPTARG}" ;;
         t) THREADS="${OPTARG}" ;;
 	D) DURATION="${OPTARG}" ;;
 	m) MAX_LATENCY="${OPTARG}" ;;
+	w) BACKGROUND_CMD="${OPTARG}" ;;
         *) usage ;;
     esac
 done
@@ -32,15 +34,19 @@ done
 create_out_dir "${OUTPUT}"
 
 # Run signaltest.
-if ! binary=$(which signaltest); then
+if ! binary=$(command -v signaltest); then
     detect_abi
     # shellcheck disable=SC2154
     binary="./bin/${abi}/signaltest"
 fi
 
+background_process_start bgcmd --cmd "${BACKGROUND_CMD}"
+
 "${binary}" -D "${DURATION}" -m -p "${PRIORITY}" -t "${THREADS}" \
     | tee "${LOGFILE}"
 
+background_process_stop bgcmd
+
 # Parse test log.
 ../../lib/parse_rt_tests_results.py signaltest "${LOGFILE}" "${MAX_LATENCY}" \
     | tee -a "${RESULT_FILE}"
diff --git a/automated/linux/signaltest/signaltest.yaml b/automated/linux/signaltest/signaltest.yaml
index 06b1205..f93bc1a 100644
--- a/automated/linux/signaltest/signaltest.yaml
+++ b/automated/linux/signaltest/signaltest.yaml
@@ -34,9 +34,11 @@ params:
     # Maximal accepted latency in us
     # This value is device/kernel specific and needs to be set in the job!
     MAX_LATENCY: "100"
+    # Background workload to be run during the meassurement
+    BACKGROUND_CMD: ""
 
 run:
     steps:
         - cd ./automated/linux/signaltest
-        - ./signaltest.sh -D "${DURATION}" -p "${PRIORITY}" -t "${THREADS}" -m "${MAX_LATENCY}"
+        - ./signaltest.sh -D "${DURATION}" -p "${PRIORITY}" -t "${THREADS}" -m "${MAX_LATENCY}" -w "${BACKGROUND_CMD}"
         - ../../utils/send-to-lava.sh ./output/result.txt