$TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT --sync-after-first-event ${file_sync_after_first} >/dev/null 2>&1
while [ ! -f "${file_sync_after_first}" ]; do
$TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT --sync-after-first-event ${file_sync_after_first} >/dev/null 2>&1
while [ ! -f "${file_sync_after_first}" ]; do