215 lines · bash
1#!/bin/sh2# Check Arm CoreSight trace data recording and synthesized samples3 4# Uses the 'perf record' to record trace data with Arm CoreSight sinks;5# then verify if there have any branch samples and instruction samples6# are generated by CoreSight with 'perf script' and 'perf report'7# commands.8 9# SPDX-License-Identifier: GPL-2.010# Leo Yan <leo.yan@linaro.org>, 202011 12glb_err=013 14skip_if_no_cs_etm_event() {15 perf list | grep -q 'cs_etm//' && return 016 17 # cs_etm event doesn't exist18 return 219}20 21skip_if_no_cs_etm_event || exit 222 23perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)24file=$(mktemp /tmp/temporary_file.XXXXX)25 26cleanup_files()27{28 rm -f ${perfdata}29 rm -f ${file}30 rm -f "${perfdata}.old"31 trap - EXIT TERM INT32 exit $glb_err33}34 35trap cleanup_files EXIT TERM INT36 37record_touch_file() {38 echo "Recording trace (only user mode) with path: CPU$2 => $1"39 rm -f $file40 perf record -o ${perfdata} -e cs_etm/@$1/u --per-thread \41 -- taskset -c $2 touch $file > /dev/null 2>&142}43 44perf_script_branch_samples() {45 echo "Looking at perf.data file for dumping branch samples:"46 47 # Below is an example of the branch samples dumping:48 # touch 6512 1 branches:u: ffffb220824c strcmp+0xc (/lib/aarch64-linux-gnu/ld-2.27.so)49 # touch 6512 1 branches:u: ffffb22082e0 strcmp+0xa0 (/lib/aarch64-linux-gnu/ld-2.27.so)50 # touch 6512 1 branches:u: ffffb2208320 strcmp+0xe0 (/lib/aarch64-linux-gnu/ld-2.27.so)51 perf script -F,-time -i ${perfdata} 2>&1 | \52 grep -E " +$1 +[0-9]+ .* +branches:(.*:)? +" > /dev/null 2>&153}54 55perf_report_branch_samples() {56 echo "Looking at perf.data file for reporting branch samples:"57 58 # Below is an example of the branch samples reporting:59 # 73.04% 73.04% touch libc-2.27.so [.] _dl_addr60 # 7.71% 7.71% touch libc-2.27.so [.] getenv61 # 2.59% 2.59% touch ld-2.27.so [.] strcmp62 perf report --stdio -i ${perfdata} 2>&1 | \63 grep -E " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 " > /dev/null 2>&164}65 66perf_report_instruction_samples() {67 echo "Looking at perf.data file for instruction samples:"68 69 # Below is an example of the instruction samples reporting:70 # 68.12% touch libc-2.27.so [.] _dl_addr71 # 5.80% touch libc-2.27.so [.] getenv72 # 4.35% touch ld-2.27.so [.] _dl_fixup73 perf report --itrace=i20i --stdio -i ${perfdata} 2>&1 | \74 grep -E " +[0-9]+\.[0-9]+% +$1" > /dev/null 2>&175}76 77arm_cs_report() {78 if [ $2 != 0 ]; then79 echo "$1: FAIL"80 glb_err=$281 else82 echo "$1: PASS"83 fi84}85 86is_device_sink() {87 # If the node of "enable_sink" is existed under the device path, this88 # means the device is a sink device. Need to exclude 'tpiu' since it89 # cannot support perf PMU.90 echo "$1" | grep -E -q -v "tpiu"91 92 if [ $? -eq 0 ] && [ -e "$1/enable_sink" ]; then93 94 pmu_dev="/sys/bus/event_source/devices/cs_etm/sinks/$2"95 96 # Warn if the device is not supported by PMU97 if ! [ -f $pmu_dev ]; then98 echo "PMU doesn't support $pmu_dev"99 fi100 101 return 0102 fi103 104 # Otherwise, it's not a sink device105 return 1106}107 108arm_cs_iterate_devices() {109 for dev in $1/connections/out\:*; do110 111 # Skip testing if it's not a directory112 ! [ -d $dev ] && continue;113 114 # Read out its symbol link file name115 path=`readlink -f $dev`116 117 # Extract device name from path, e.g.118 # path = '/sys/devices/platform/20010000.etf/tmc_etf0'119 # `> device_name = 'tmc_etf0'120 device_name=$(basename $path)121 122 if is_device_sink $path $device_name; then123 124 record_touch_file $device_name $2 &&125 perf_script_branch_samples touch &&126 perf_report_branch_samples touch &&127 perf_report_instruction_samples touch128 129 err=$?130 arm_cs_report "CoreSight path testing (CPU$2 -> $device_name)" $err131 fi132 133 arm_cs_iterate_devices $dev $2134 done135}136 137arm_cs_etm_traverse_path_test() {138 # Iterate for every ETM device139 for dev in /sys/bus/event_source/devices/cs_etm/cpu*; do140 # Canonicalize the path141 dev=`readlink -f $dev`142 143 # Find the ETM device belonging to which CPU144 cpu=`cat $dev/cpu`145 146 # Use depth-first search (DFS) to iterate outputs147 arm_cs_iterate_devices $dev $cpu148 done149}150 151arm_cs_etm_system_wide_test() {152 echo "Recording trace with system wide mode"153 perf record -o ${perfdata} -e cs_etm// -a -- ls > /dev/null 2>&1154 155 # System-wide mode should include perf samples so test for that156 # instead of ls157 perf_script_branch_samples perf &&158 perf_report_branch_samples perf &&159 perf_report_instruction_samples perf160 161 err=$?162 arm_cs_report "CoreSight system wide testing" $err163}164 165arm_cs_etm_snapshot_test() {166 echo "Recording trace with snapshot mode"167 perf record -o ${perfdata} -e cs_etm// -S \168 -- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 &169 PERFPID=$!170 171 # Wait for perf program172 sleep 1173 174 # Send signal to snapshot trace data175 kill -USR2 $PERFPID176 177 # Stop perf program178 kill $PERFPID179 wait $PERFPID180 181 perf_script_branch_samples dd &&182 perf_report_branch_samples dd &&183 perf_report_instruction_samples dd184 185 err=$?186 arm_cs_report "CoreSight snapshot testing" $err187}188 189arm_cs_etm_basic_test() {190 echo "Recording trace with '$*'"191 perf record -o ${perfdata} "$@" -m,8M -- ls > /dev/null 2>&1192 193 perf_script_branch_samples ls &&194 perf_report_branch_samples ls &&195 perf_report_instruction_samples ls196 197 err=$?198 arm_cs_report "CoreSight basic testing with '$*'" $err199}200 201arm_cs_etm_traverse_path_test202arm_cs_etm_system_wide_test203arm_cs_etm_snapshot_test204 205# Test all combinations of per-thread, system-wide and normal mode with206# and without timestamps207arm_cs_etm_basic_test -e cs_etm/timestamp=0/ --per-thread208arm_cs_etm_basic_test -e cs_etm/timestamp=1/ --per-thread209arm_cs_etm_basic_test -e cs_etm/timestamp=0/ -a210arm_cs_etm_basic_test -e cs_etm/timestamp=1/ -a211arm_cs_etm_basic_test -e cs_etm/timestamp=0/212arm_cs_etm_basic_test -e cs_etm/timestamp=1/213 214exit $glb_err215