CI Tests: Instead of waiting for a random event/hit, trigger one via ping

tests/Regression/netdev-receive/runtest.sh

@@ -29,16 +29,14 @@
 . /usr/share/beakerlib/beakerlib.sh || exit 1
 
 PACKAGE="systemtap"
-TMPFILE=$(mktemp)
 
 rlJournalStart
     rlPhaseStartTest
-        # Here we rely on that netdev.receive gets hit immediately without us explicitly triggering it.
-	# Not all rhel-7 stap versions have -T already, so we use -E instead.
-        rlRun "stap -o $TMPFILE -ve 'probe netdev.receive{log(\"HIT\") exit()}' -E 'probe timer.s(30) {log(\"TIMEOUT\") exit()}'"
+        rlRun "TMPFILE=$(mktemp)"
+        rlRun "stap -o $TMPFILE -ve 'probe netdev.receive{log(\"HIT\") exit()}' -c 'ping -c1 localhost'"
         rlRun "cat $TMPFILE"
         rlRun "grep HIT $TMPFILE"
-        rlRun "grep TIMEOUT $TMPFILE" 1
+        rlRun "rm $TMPFILE"
     rlPhaseEnd
 rlJournalPrintText
 rlJournalEnd