4 files changed, 204 insertions, 0 deletions
diff --git a/tools/tracing/rtla/tests/engine.sh b/tools/tracing/rtla/tests/engine.sh
new file mode 100644
index 000000000000..f2616a8e4179
--- /dev/null
+++ b/tools/tracing/rtla/tests/engine.sh
@@ -0,0 +1,117 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+test_begin() {
+	# Count tests to allow the test harness to double-check if all were
+	# included correctly.
+	ctr=0
+	[ -z "$RTLA" ] && RTLA="./rtla"
+	[ -n "$TEST_COUNT" ] && echo "1..$TEST_COUNT"
+}
+
+reset_osnoise() {
+	# Reset osnoise options to default and remove any dangling instances created
+	# by improperly exited rtla runs.
+	pushd /sys/kernel/tracing || return 1
+
+	# Remove dangling instances created by previous rtla run
+	echo 0 > tracing_thresh
+	cd instances
+	for i in osnoise_top osnoise_hist timerlat_top timerlat_hist
+	do
+		[ ! -d "$i" ] && continue
+		rmdir "$i"
+	done
+
+	# Reset options to default
+	# Note: those are copied from the default values of osnoise_data
+	# in kernel/trace/trace_osnoise.c
+	cd ../osnoise
+	echo all > cpus
+	echo DEFAULTS > options
+	echo 1000000 > period_us
+	echo 0 > print_stack
+	echo 1000000 > runtime_us
+	echo 0 > stop_tracing_total_us
+	echo 0 > stop_tracing_us
+	echo 1000 > timerlat_period_us
+
+	popd
+}
+
+check() {
+	expected_exitcode=${3:-0}
+	# Simple check: run rtla with given arguments and test exit code.
+	# If TEST_COUNT is set, run the test. Otherwise, just count.
+	ctr=$(($ctr + 1))
+	if [ -n "$TEST_COUNT" ]
+	then
+		# Reset osnoise options before running test.
+		[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise
+		# Run rtla; in case of failure, include its output as comment
+		# in the test results.
+		result=$(stdbuf -oL $TIMEOUT "$RTLA" $2 2>&1); exitcode=$?
+		if [ $exitcode -eq $expected_exitcode ]
+		then
+			echo "ok $ctr - $1"
+		else
+			echo "not ok $ctr - $1"
+			# Add rtla output and exit code as comments in case of failure
+			echo "$result" | col -b | while read line; do echo "# $line"; done
+			printf "#\n# exit code %s\n" $exitcode
+		fi
+	fi
+}
+
+check_with_osnoise_options() {
+	# Do the same as "check", but with pre-set osnoise options.
+	# Note: rtla should reset the osnoise options, this is used to test
+	# if it indeed does so.
+	# Save original arguments
+	arg1=$1
+	arg2=$2
+	arg3=$3
+
+	# Apply osnoise options (if not dry run)
+	if [ -n "$TEST_COUNT" ]
+	then
+		[ "$NO_RESET_OSNOISE" == 1 ] || reset_osnoise
+		shift
+		shift
+		while shift
+		do
+			[ "$1" == "" ] && continue
+			option=$(echo $1 | cut -d '=' -f 1)
+			value=$(echo $1 | cut -d '=' -f 2)
+			echo "option: $option, value: $value"
+			echo "$value" > "/sys/kernel/tracing/osnoise/$option" || return 1
+		done
+	fi
+
+	NO_RESET_OSNOISE=1 check "$arg1" "$arg2" "$arg3"
+}
+
+set_timeout() {
+	TIMEOUT="timeout -v -k 15s $1"
+}
+
+unset_timeout() {
+	unset TIMEOUT
+}
+
+set_no_reset_osnoise() {
+	NO_RESET_OSNOISE=1
+}
+
+unset_no_reset_osnoise() {
+	unset NO_RESET_OSNOISE
+}
+
+test_end() {
+	# If running without TEST_COUNT, tests are not actually run, just
+	# counted. In that case, re-run the test with the correct count.
+	[ -z "$TEST_COUNT" ] && TEST_COUNT=$ctr exec bash $0 || true
+}
+
+# Avoid any environmental discrepancies
+export LC_ALL=C
+unset_timeout
diff --git a/tools/tracing/rtla/tests/hwnoise.t b/tools/tracing/rtla/tests/hwnoise.t
new file mode 100644
index 000000000000..5f71401a139e
--- /dev/null
+++ b/tools/tracing/rtla/tests/hwnoise.t
@@ -0,0 +1,21 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+source tests/engine.sh
+test_begin
+
+set_timeout 2m
+
+check "verify help page" \
+	"hwnoise --help"
+check "detect noise higher than one microsecond" \
+	"hwnoise -c 0 -T 1 -d 5s -q"
+check "set the automatic trace mode" \
+	"hwnoise -a 5 -d 30s" 2
+check "set scheduling param to the osnoise tracer threads" \
+	"hwnoise -P F:1 -c 0 -r 900000 -d 1M -q"
+check "stop the trace if a single sample is higher than 1 us" \
+	"hwnoise -s 1 -T 1 -t -d 30s" 2
+check "enable a trace event trigger" \
+	"hwnoise -t -e osnoise:irq_noise trigger=\"hist:key=desc,duration:sort=desc,duration:vals=hitcount\" -d 1m"
+
+test_end
diff --git a/tools/tracing/rtla/tests/osnoise.t b/tools/tracing/rtla/tests/osnoise.t
new file mode 100644
index 000000000000..44908fc01abf
--- /dev/null
+++ b/tools/tracing/rtla/tests/osnoise.t
@@ -0,0 +1,25 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+source tests/engine.sh
+test_begin
+
+set_timeout 2m
+
+check "verify help page" \
+	"osnoise --help"
+check "verify the --priority/-P param" \
+	"osnoise top -P F:1 -c 0 -r 900000 -d 1M -q"
+check "verify the --stop/-s param" \
+	"osnoise top -s 30 -T 1 -t" 2
+check "verify the  --trace param" \
+	"osnoise hist -s 30 -T 1 -t" 2
+check "verify the --entries/-E param" \
+	"osnoise hist -P F:1 -c 0 -r 900000 -d 1M -b 10 -E 25"
+
+# Test setting default period by putting an absurdly high period
+# and stopping on threshold.
+# If default period is not set, this will time out.
+check_with_osnoise_options "apply default period" \
+	"osnoise hist -s 1" 2 period_us=600000000
+
+test_end
diff --git a/tools/tracing/rtla/tests/timerlat.t b/tools/tracing/rtla/tests/timerlat.t
new file mode 100644
index 000000000000..579c12a85e8f
--- /dev/null
+++ b/tools/tracing/rtla/tests/timerlat.t
@@ -0,0 +1,41 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+source tests/engine.sh
+test_begin
+
+set_timeout 2m
+timerlat_sample_event='/sys/kernel/tracing/events/osnoise/timerlat_sample'
+
+if ldd $RTLA | grep libbpf >/dev/null && [ -d "$timerlat_sample_event" ]
+then
+	# rtla build with BPF and system supports BPF mode
+	no_bpf_options='0 1'
+else
+	no_bpf_options='1'
+fi
+
+# Do every test with and without BPF
+for option in $no_bpf_options
+do
+export RTLA_NO_BPF=$option
+check "verify help page" \
+	"timerlat --help"
+check "verify -s/--stack" \
+	"timerlat top -s 3 -T 10 -t" 2
+check "verify -P/--priority" \
+	"timerlat top -P F:1 -c 0 -d 1M -q"
+check "test in nanoseconds" \
+	"timerlat top -i 2 -c 0 -n -d 30s" 2
+check "set the automatic trace mode" \
+	"timerlat top -a 5 --dump-tasks" 2
+check "print the auto-analysis if hits the stop tracing condition" \
+	"timerlat top --aa-only 5" 2
+check "disable auto-analysis" \
+	"timerlat top -s 3 -T 10 -t --no-aa" 2
+check "verify -c/--cpus" \
+	"timerlat hist -c 0 -d 30s"
+check "hist test in nanoseconds" \
+	"timerlat hist -i 2 -c 0 -n -d 30s" 2
+done
+
+test_end