perf test: Add more test cases for perf lock contention

Check callstack filter with two different aggregation mode.

$ sudo ./perf test -v contention
88: kernel lock contention analysis test :
--- start ---
test child forked, pid 83416
Testing perf lock record and perf lock contention
Testing perf lock contention --use-bpf
Testing perf lock record and perf lock contention at the same time
Testing perf lock contention --threads
Testing perf lock contention --lock-addr
Testing perf lock contention --type-filter (w/ spinlock)
Testing perf lock contention --lock-filter (w/ tasklist_lock)
Testing perf lock contention --callstack-filter (w/ unix_stream)
Testing perf lock contention --callstack-filter with task aggregation
test child finished with 0
---- end ----
kernel lock contention analysis test: Ok

Signed-off-by: Namhyung Kim <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Hao Luo <[e-mail]>
Cc: Ian Rogers <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Song Liu <[e-mail]>
Cc: [e-mail]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/tests/shell/lock_contention.sh

···
 	echo "Testing perf lock contention --type-filter (w/ spinlock)"
 	perf lock contention -i ${perfdata} -Y spinlock -q 2> ${result}
 	if [ $(grep -c -v spinlock "${result}") != "0" ]; then
-		echo "[Fail] Recorded should not have non-spinlocks:" $(cat "${result}")
+		echo "[Fail] Recorded result should not have non-spinlocks:" $(cat "${result}")
 		err=1
 		exit
 	fi
···
 
 	perf lock con -a -b -Y spinlock -q -- perf bench sched messaging > /dev/null 2> ${result}
 	if [ $(grep -c -v spinlock "${result}") != "0" ]; then
-		echo "[Fail] Recorded should not have non-spinlocks:" $(cat "${result}")
+		echo "[Fail] BPF result should not have non-spinlocks:" $(cat "${result}")
 		err=1
 		exit
 	fi
···
 	local type=$(head -1 "${result}" | awk '{ print $8 }' | sed -e 's/:.*//')
 
 	if [ $(grep -c -v "${type}" "${result}") != "0" ]; then
-		echo "[Fail] Recorded should not have non-${type} locks:" $(cat "${result}")
+		echo "[Fail] Recorded result should not have non-${type} locks:" $(cat "${result}")
 		err=1
 		exit
 	fi
···
 
 	perf lock con -a -b -L tasklist_lock -q -- perf bench sched messaging > /dev/null 2> ${result}
 	if [ $(grep -c -v "${type}" "${result}") != "0" ]; then
-		echo "[Fail] Recorded should not have non-${type} locks:" $(cat "${result}")
+		echo "[Fail] BPF result should not have non-${type} locks:" $(cat "${result}")
+		err=1
+		exit
+	fi
+}
+
+test_stack_filter()
+{
+	echo "Testing perf lock contention --callstack-filter (w/ unix_stream)"
+	perf lock contention -i ${perfdata} -v -q 2> ${result}
+	if [ $(grep -c unix_stream "${result}") == "0" ]; then
+		echo "[Skip] Could not find 'unix_stream'"
+		return
+	fi
+
+	perf lock contention -i ${perfdata} -E 1 -S unix_stream -q 2> ${result}
+	if [ $(cat "${result}" | wc -l) != "1" ]; then
+		echo "[Fail] Recorded result should have a lock from unix_stream:" $(cat "${result}")
+		err=1
+		exit
+	fi
+
+	if ! perf lock con -b true > /dev/null 2>&1 ; then
+		return
+	fi
+
+	perf lock con -a -b -S unix_stream -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result}
+	if [ $(cat "${result}" | wc -l) != "1" ]; then
+		echo "[Fail] BPF result should have a lock from unix_stream:" $(cat "${result}")
+		err=1
+		exit
+	fi
+}
+
+test_aggr_task_stack_filter()
+{
+	echo "Testing perf lock contention --callstack-filter with task aggregation"
+	perf lock contention -i ${perfdata} -v -q 2> ${result}
+	if [ $(grep -c unix_stream "${result}") == "0" ]; then
+		echo "[Skip] Could not find 'unix_stream'"
+		return
+	fi
+
+	perf lock contention -i ${perfdata} -t -E 1 -S unix_stream -q 2> ${result}
+	if [ $(cat "${result}" | wc -l) != "1" ]; then
+		echo "[Fail] Recorded result should have a task from unix_stream:" $(cat "${result}")
+		err=1
+		exit
+	fi
+
+	if ! perf lock con -b true > /dev/null 2>&1 ; then
+		return
+	fi
+
+	perf lock con -a -b -t -S unix_stream -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result}
+	if [ $(cat "${result}" | wc -l) != "1" ]; then
+		echo "[Fail] BPF result should have a task from unix_stream:" $(cat "${result}")
 		err=1
 		exit
 	fi
···
 test_aggr_addr
 test_type_filter
 test_lock_filter
+test_stack_filter
+test_aggr_task_stack_filter
 
 exit ${err}