Resguardo inicial

linux-7.2.3/tools/perf/tests/shell/coresight/concurrent_threads.sh

@@ -0,0 +1,45 @@
+#!/bin/bash -e
+# CoreSight concurrent threads (exclusive)
+
+# SPDX-License-Identifier: GPL-2.0
+
+# If CoreSight is not available, skip the test
+perf list pmu | grep -q cs_etm || exit 2
+
+tmpdir=$(mktemp -d /tmp/__perf_test.coresight_concurrent_threads.XXXXX)
+
+cleanup() {
+	rm -rf "${tmpdir}"
+	trap - EXIT TERM INT
+}
+
+trap_cleanup() {
+	cleanup
+	exit 1
+}
+trap trap_cleanup EXIT TERM INT
+
+cf="$tmpdir/ctl"
+af="$tmpdir/ack"
+mkfifo "$cf" "$af"
+
+nthreads=10
+
+# Timestamps off to reduce trace size, start disabled and use the control FIFO
+# to only record the workload and not startup.
+perf record -o "$tmpdir/data" -e cs_etm/timestamp=0/u -D -1 --control fifo:"$cf","$af" \
+	-- perf test --record-ctl fifo:"$cf","$af" -w named_threads $nthreads 1 > /dev/null 2>&1
+
+perf script -i "$tmpdir/data" > "$tmpdir/script" 2>/dev/null
+
+# Check all threads were traced and they have the correct thread name and symbol
+for i in $(seq 1 $nthreads); do
+	if ! grep -q "thread${i} .* named_threads_thread${i}" "$tmpdir/script"; then
+		echo "Error: thread${i} missing" >&2
+		cleanup
+		exit 1
+	fi
+done
+
+cleanup
+exit 0

linux-7.2.3/tools/perf/tests/shell/coresight/context_switch_thread.sh

@@ -0,0 +1,69 @@
+#!/bin/bash -e
+# CoreSight context switch thread attribution (exclusive)
+
+# SPDX-License-Identifier: GPL-2.0
+
+# If CoreSight is not available, skip the test
+perf list pmu | grep -q cs_etm || exit 2
+
+if [ "$(id -u)" != 0 ]; then
+	# Requires root for "-C 0" in record command
+	echo "[Skip] No root permission"
+	exit 2
+fi
+
+tmpdir=$(mktemp -d /tmp/__perf_test.coresight_context_switch.XXXXX)
+
+cleanup() {
+	rm -rf "${tmpdir}"
+	trap - EXIT TERM INT
+}
+
+trap_cleanup() {
+	cleanup
+	exit 1
+}
+trap trap_cleanup EXIT TERM INT
+
+check_samples() {
+	owner_samples=$(grep -c "proc1.*context_switch_loop_proc1" "$tmpdir/script" || true)
+	next_samples=$(grep -c "proc2.*context_switch_loop_proc2" "$tmpdir/script" || true)
+
+	if [ "$owner_samples" -eq 0 ] || [ "$next_samples" -eq 0 ]; then
+		echo "No samples found"
+		cleanup
+		exit 1
+	fi
+
+	if grep "proc2.*context_switch_loop_proc1" "$tmpdir/script"; then
+		echo "Thread1 symbol was attributed to proc2"
+		cleanup
+		exit 1
+	fi
+
+	if grep "proc1.*context_switch_loop_proc2" "$tmpdir/script"; then
+		echo "Thread2 symbol was attributed to proc1"
+		cleanup
+		exit 1
+	fi
+}
+
+cf="$tmpdir/ctl"
+af="$tmpdir/ack"
+mkfifo "$cf" "$af"
+
+# Pin to one CPU so the two threads alternate running but record into the same
+# trace buffer. Start disabled and use the control FIFO to only record the
+# workload and not startup.
+perf record -o "$tmpdir/data" -e cs_etm/timestamp=0/u -C 0 -D -1 --control fifo:"$cf","$af" -- \
+	taskset --cpu-list 0 perf test --record-ctl fifo:"$cf","$af" \
+	-w context_switch_loop > /dev/null 2>&1
+
+# Test both instruction and branch sample generation modes.
+perf script -i "$tmpdir/data" --itrace=i4 -F comm,pid,tid,ip,sym > "$tmpdir/script" 2>/dev/null
+check_samples
+perf script -i "$tmpdir/data" --itrace=b -F comm,pid,tid,ip,sym > "$tmpdir/script" 2>/dev/null
+check_samples
+
+cleanup
+exit 0

linux-7.2.3/tools/perf/tests/shell/coresight/deterministic.sh

@@ -0,0 +1,72 @@
+#!/bin/bash -e
+# CoreSight deterministic workload decode (exclusive)
+
+# SPDX-License-Identifier: GPL-2.0
+
+# If CoreSight is not available, skip the test
+perf list pmu | grep -q cs_etm || exit 2
+
+tmpdir=$(mktemp -d /tmp/__perf_test.coresight_deterministic.XXXXX)
+
+cleanup() {
+	rm -rf "${tmpdir}"
+	trap - EXIT TERM INT
+}
+
+trap_cleanup() {
+	cleanup
+	exit 1
+}
+trap trap_cleanup EXIT TERM INT
+
+cf="$tmpdir/ctl"
+af="$tmpdir/ack"
+mkfifo "$cf" "$af"
+
+# Start disabled and use the control FIFO to only record the workload and not
+# startup.
+perf record -o "$tmpdir/data" -e cs_etm//u -D -1 --control fifo:"$cf","$af" -- \
+	perf test --record-ctl fifo:"$cf","$af" -w deterministic > /dev/null 2>&1
+
+perf script -i "$tmpdir/data" --itrace=i1i -F ip,srcline | \
+	grep "deterministic.c" | uniq > "$tmpdir/script" 2>/dev/null
+
+
+# Remove brace lines and call sites as they may not be hit or may have
+# extra hits after returning, depending on the compiler.
+sed -i \
+  -e '/deterministic.c:8$/d' \
+  -e '/deterministic.c:12$/d' \
+  -e '/deterministic.c:15$/d' \
+  -e '/deterministic.c:19$/d' \
+  -e '/deterministic.c:23$/d' \
+  -e '/deterministic.c:28$/d' \
+  -e '/deterministic.c:34$/d' \
+  -e '/deterministic.c:36$/d' \
+  -e '/deterministic.c:37$/d' \
+  "$tmpdir/script"
+
+cat > "$tmpdir/expected" << EOF
+  deterministic.c:24
+  deterministic.c:25
+  deterministic.c:26
+  deterministic.c:9
+  deterministic.c:10
+  deterministic.c:11
+  deterministic.c:30
+  deterministic.c:31
+  deterministic.c:32
+  deterministic.c:16
+  deterministic.c:17
+  deterministic.c:18
+EOF
+
+if ! diff -q "$tmpdir/script" "$tmpdir/expected"; then
+	echo "FAIL: line numbers don't match expected: "
+	head -n 100 "$tmpdir/script"
+	cleanup
+	exit 1
+fi
+
+cleanup
+exit 0

linux-7.2.3/tools/perf/tests/shell/coresight/raw_dump_stress.sh

@@ -0,0 +1,65 @@
+#!/bin/bash -e
+# CoreSight raw dump stress (exclusive)
+
+# SPDX-License-Identifier: GPL-2.0
+
+if [ "$(id -u)" != 0 ]; then
+	# Requires root for larger buffer size
+	echo "[Skip] No root permission"
+	exit 2
+fi
+
+# If CoreSight is not available, skip the test
+perf list pmu | grep -q cs_etm || exit 2
+
+tmpdir=$(mktemp -d /tmp/__perf_test.coresight_raw_dump_stress.XXXXX)
+
+cleanup() {
+	rm -r "${tmpdir}"
+	trap - EXIT TERM INT
+}
+
+trap_cleanup() {
+	cleanup
+	exit 1
+}
+trap trap_cleanup EXIT TERM INT
+
+# Use exit snapshot to record 2M of trace to make about 80MB of raw dump data.
+echo "Recording..."
+perf record -e cs_etm/timestamp=0/u -m,2M -Se -o "$tmpdir/data" -- \
+	perf test -w brstack 20000 > /dev/null 2>&1
+
+# Test raw dump runs to completion but don't decode because that's too slow for
+# a test
+echo "Dumping raw trace..."
+perf report --dump-raw-trace -i "$tmpdir/data" 2>/dev/null > "$tmpdir/rawdump"
+
+# Get the size and offset of the first AUXTRACE buffer and the index of the last
+# packet in the raw dump.
+read -r size offset last_idx <<< "$(awk '
+	found && /PERF_RECORD_/ { exit }
+	/PERF_RECORD_AUXTRACE / { found = 1; size = $7; offset = $9; next }
+	found && /Idx:/ { last_idx = $1; gsub(/Idx:|;/, "", last_idx) }
+	END { if (last_idx) print size, offset, last_idx }
+' "$tmpdir/rawdump")"
+
+# The last Idx minus start offset should equal the size of the buffer if
+# everything was dumped. Allow 48 bytes difference to cover 3 frames: current
+# frame length, a partial frame and a final empty one, all of which aren't
+# dumped.
+#
+# TODO: for a single snapshot, offset should always be zero. However, we
+# currently output AUX records in snapshot mode when we shouldn't, which
+# increments the offset. Allow for that until it's fixed so we can test raw
+# dumping.
+decode_size=$((1 + last_idx - offset))
+if [ "$decode_size" -gt "$((size - 48))" ] && [ "$decode_size" -le "$((size))" ]; then
+	echo "PASS: AUXTRACE buffer length matches dumped packet index"
+	cleanup
+	exit 0
+fi
+
+echo "FAIL: AUXTRACE buffer length mismatch: size=$size offset=$offset last_idx=$last_idx decode_size=$decode_size"
+cleanup
+exit 1

linux-7.2.3/tools/perf/tests/shell/coresight/test_arm_coresight.sh

@@ -0,0 +1,257 @@
+#!/bin/bash
+# Check Arm CoreSight trace data recording and synthesized samples (exclusive)
+
+# Uses the 'perf record' to record trace data with Arm CoreSight sinks;
+# then verify if there have any branch samples and instruction samples
+# are generated by CoreSight with 'perf script' and 'perf report'
+# commands.
+
+# SPDX-License-Identifier: GPL-2.0
+# Leo Yan <leo.yan@linaro.org>, 2020
+
+glb_err=0
+
+skip_if_no_cs_etm_event() {
+	perf list pmu | grep -q 'cs_etm//' && return 0
+
+	# cs_etm event doesn't exist
+	return 2
+}
+
+skip_if_no_cs_etm_event || exit 2
+
+if [ "$(id -u)" != 0 ]; then
+	# Requires root for -C and system wide tests
+	echo "[Skip] No root permission"
+	exit 2
+fi
+
+perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+file=$(mktemp /tmp/temporary_file.XXXXX)
+
+cleanup_files()
+{
+	rm -f ${perfdata}
+	rm -f ${file}
+	rm -f "${perfdata}.old"
+	trap - EXIT TERM INT
+	exit $glb_err
+}
+
+trap cleanup_files EXIT TERM INT
+
+record_touch_file() {
+	echo "Recording trace (only user mode) with path: CPU$2 => $1"
+	rm -f $file
+	perf record -o ${perfdata} -e cs_etm/@$1/u --per-thread \
+		-- taskset -c $2 touch $file > /dev/null 2>&1
+}
+
+perf_script_branch_samples() {
+	echo "Looking at perf.data file for dumping branch samples:"
+
+	# Below is an example of the branch samples dumping:
+	#   touch  6512          1         branches:u:      ffffb220824c strcmp+0xc (/lib/aarch64-linux-gnu/ld-2.27.so)
+	#   touch  6512          1         branches:u:      ffffb22082e0 strcmp+0xa0 (/lib/aarch64-linux-gnu/ld-2.27.so)
+	#   touch  6512          1         branches:u:      ffffb2208320 strcmp+0xe0 (/lib/aarch64-linux-gnu/ld-2.27.so)
+	perf script -F,-time -i ${perfdata} 2>&1 | \
+		grep -E " +$1 +[0-9]+ .* +branches:(.*:)? +" > /dev/null 2>&1
+}
+
+perf_report_instruction_samples() {
+	echo "Looking at perf.data file for instruction samples:"
+
+	# Below is an example of the instruction samples reporting:
+	#   68.12%  touch    libc-2.27.so   [.] _dl_addr
+	#    5.80%  touch    libc-2.27.so   [.] getenv
+	#    4.35%  touch    ld-2.27.so     [.] _dl_fixup
+	perf report --itrace=i20i --stdio -i ${perfdata} 2>&1 | \
+		grep -E " +[0-9]+\.[0-9]+% +$1" > /dev/null 2>&1
+}
+
+arm_cs_report() {
+	if [ $2 != 0 ]; then
+		echo "$1: FAIL"
+		glb_err=$2
+	else
+		echo "$1: PASS"
+	fi
+}
+
+is_device_sink() {
+	# If the node of "enable_sink" is existed under the device path, this
+	# means the device is a sink device.  Need to exclude 'tpiu' since it
+	# cannot support perf PMU.
+	echo "$1" | grep -E -q -v "tpiu"
+
+	if [ $? -eq 0 ] && [ -e "$1/enable_sink" ]; then
+
+		pmu_dev="/sys/bus/event_source/devices/cs_etm/sinks/$2"
+
+		# Warn if the device is not supported by PMU
+		if ! [ -f $pmu_dev ]; then
+			echo "PMU doesn't support $pmu_dev"
+		fi
+
+		return 0
+	fi
+
+	# Otherwise, it's not a sink device
+	return 1
+}
+
+arm_cs_iterate_devices() {
+	for dev in $1/connections/out\:*; do
+
+		# Skip testing if it's not a directory
+		! [ -d $dev ] && continue;
+
+		# Read out its symbol link file name
+		path=`readlink -f $dev`
+
+		# Extract device name from path, e.g.
+		#   path = '/sys/devices/platform/20010000.etf/tmc_etf0'
+		#     `> device_name = 'tmc_etf0'
+		device_name=$(basename $path)
+
+		if is_device_sink $path $device_name; then
+
+			record_touch_file $device_name $2 &&
+			perf_script_branch_samples touch &&
+			perf_report_instruction_samples touch
+
+			err=$?
+			arm_cs_report "CoreSight path testing (CPU$2 -> $device_name)" $err
+		fi
+
+		arm_cs_iterate_devices $dev $2
+	done
+}
+
+arm_cs_etm_traverse_path_test() {
+	# Iterate for every ETM device
+	for dev in /sys/bus/event_source/devices/cs_etm/cpu*; do
+		# Canonicalize the path
+		dev=`readlink -f $dev`
+
+		# Find the ETM device belonging to which CPU
+		cpu=`cat $dev/cpu`
+
+		# Use depth-first search (DFS) to iterate outputs
+		arm_cs_iterate_devices $dev $cpu
+	done
+}
+
+arm_cs_etm_system_wide_test() {
+	echo "Recording trace with system wide mode"
+	perf record -o ${perfdata} -e cs_etm// -a -- ls > /dev/null 2>&1
+
+	# System-wide mode should include perf samples so test for that
+	# instead of ls
+	perf_script_branch_samples perf
+
+	err=$?
+	arm_cs_report "CoreSight system wide testing" $err
+}
+
+arm_cs_etm_snapshot_test() {
+	echo "Recording trace with snapshot mode"
+	perf record -o ${perfdata} -e cs_etm// -S -m,128K \
+		-- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 &
+	PERFPID=$!
+
+	# Wait for perf program
+	sleep 1
+
+	# Send signal to snapshot trace data
+	kill -USR2 $PERFPID
+
+	# Stop perf program
+	kill $PERFPID
+	wait $PERFPID
+
+	perf_script_branch_samples dd &&
+	perf_report_instruction_samples dd
+
+	err=$?
+	arm_cs_report "CoreSight snapshot testing" $err
+}
+
+arm_cs_etm_basic_test() {
+	echo "Recording trace with '$*'"
+	perf record -o ${perfdata} "$@" -- true > /dev/null 2>&1
+
+	perf_script_branch_samples true
+
+	err=$?
+	arm_cs_report "CoreSight basic testing with '$*'" $err
+}
+
+arm_cs_etm_test_cpu_list() {
+	echo "Testing sparse CPU list: $1"
+	perf record -o ${perfdata} -e cs_etm//u -C $1 \
+		-- taskset --cpu-list $1 true > /dev/null 2>&1
+	perf_script_branch_samples true
+	err=$?
+	arm_cs_report "CoreSight sparse CPUs with '$*'" $err
+}
+
+arm_cs_etm_sparse_cpus_test() {
+	# Iterate for every ETM device
+	cpus=()
+	for dev in /sys/bus/event_source/devices/cs_etm/cpu*; do
+		# Canonicalize the path
+		dev=`readlink -f $dev`
+
+		# Find the ETM device belonging to which CPU
+		cpus+=("$(cat $dev/cpu)")
+	done
+
+	mapfile -t cpus < <(printf '%s\n' "${cpus[@]}" | sort -n)
+	total=${#cpus[@]}
+
+	# Need more than 1 to test
+	if [ $total -le 1 ]; then
+		return 0
+	fi
+
+	half=$((total / 2))
+
+	# First half
+	first_half=$(IFS=,; echo "${cpus[*]:0:$half}")
+	arm_cs_etm_test_cpu_list $first_half
+
+	# Second half
+	second_half=$(IFS=,; echo "${cpus[*]:$half}")
+	arm_cs_etm_test_cpu_list $second_half
+
+	# Odd list is the same as halves unless >= 4 CPUs
+	if [ $total -lt 4 ]; then
+		return 0
+	fi
+
+	# Odd indices
+	odd_cpus=()
+	for ((i=1; i<total; i+=2)); do
+		odd_cpus+=("${cpus[$i]}")
+	done
+	odd_list=$(IFS=,; echo "${odd_cpus[*]}")
+	arm_cs_etm_test_cpu_list $odd_list
+}
+
+arm_cs_etm_traverse_path_test
+arm_cs_etm_system_wide_test
+arm_cs_etm_snapshot_test
+
+# Test all combinations of per-thread, system-wide and normal mode with
+# and without timestamps
+arm_cs_etm_basic_test -e cs_etm/timestamp=0/u --per-thread
+arm_cs_etm_basic_test -e cs_etm/timestamp=1/u --per-thread
+arm_cs_etm_basic_test -e cs_etm/timestamp=0/u -a
+arm_cs_etm_basic_test -e cs_etm/timestamp=1/u -a
+arm_cs_etm_basic_test -e cs_etm/timestamp=0/u
+arm_cs_etm_basic_test -e cs_etm/timestamp=1/u
+
+arm_cs_etm_sparse_cpus_test
+
+exit $glb_err

linux-7.2.3/tools/perf/tests/shell/coresight/test_arm_coresight_disasm.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+# Check Arm CoreSight disassembly script completes without errors (exclusive)
+# SPDX-License-Identifier: GPL-2.0
+
+# The disassembly script reconstructs ranges of instructions and gives these to objdump to
+# decode. objdump doesn't like ranges that go backwards, but these are a good indication
+# that decoding has gone wrong either in OpenCSD, Perf or in the range reconstruction in
+# the script. Test all 3 parts are working correctly by running the script.
+
+skip_if_no_cs_etm_event() {
+	perf list pmu | grep -q 'cs_etm//' && return 0
+
+	# cs_etm event doesn't exist
+	return 2
+}
+
+skip_if_no_cs_etm_event || exit 2
+
+# Assume an error unless we reach the very end
+set -e
+glb_err=1
+
+perfdata_dir=$(mktemp -d /tmp/__perf_test.perf.data.XXXXX)
+perfdata=${perfdata_dir}/perf.data
+file=$(mktemp /tmp/temporary_file.XXXXX)
+# Relative path works whether it's installed or running from repo
+script_path=$(dirname "$0")/../../../scripts/python/arm-cs-trace-disasm.py
+
+cleanup_files()
+{
+	set +e
+	rm -rf ${perfdata_dir}
+	rm -f ${file}
+	trap - EXIT TERM INT
+	exit $glb_err
+}
+
+trap cleanup_files EXIT TERM INT
+
+# Ranges start and end on branches, so check for some likely branch instructions
+branch_search='[[:space:]](bl|b(\.(eq|ne|cs|cc|mi|pl|vs|vc|hi|ls|ge|lt|gt|le|al))?|br|blr|ret|cbz|cbnz|tbz|tbnz|svc|eret)([[:space:]]|$)'
+
+## Test kernel ##
+if [ "$(id -u)" == 0 ] && [ -e /proc/kcore ]; then
+	echo "Testing kernel disassembly"
+	perf record -o ${perfdata} -e cs_etm//k --kcore -Se -m,64K -- touch $file > /dev/null 2>&1
+	perf script -i ${perfdata} -s python:${script_path} -- \
+		-d --stop-sample=2 -k ${perfdata}/kcore_dir/kcore 2> /dev/null > ${file}
+	grep -q -E ${branch_search} ${file}
+	echo "Found kernel branches"
+else
+	# Root and kcore are required for correct kernel decode due to runtime code patching
+	echo "No root or kcore, skipping kernel test"
+fi
+
+## Test user ##
+echo "Testing userspace disassembly"
+perf record -o ${perfdata} -e cs_etm//u -Se -m,64K -- touch $file > /dev/null 2>&1
+perf script -i ${perfdata} -s python:${script_path} -- \
+	-d --stop-sample=2 2> /dev/null > ${file}
+grep -q -E ${branch_search} ${file}
+echo "Found userspace branches"
+
+glb_err=0