1# SPDX-License-Identifier: GPL-2.0 2# Carsten Haitzler <carsten.haitzler@arm.com>, 2021 3 4# This is sourced from a driver script so no need for #!/bin... etc. at the 5# top - the assumption below is that it runs as part of sourcing after the 6# test sets up some basic env vars to say what it is. 7 8# This currently works with ETMv4 / ETF not any other packet types at thi 9# point. This will need changes if that changes. 10 11# perf record options for the perf tests to use 12PERFRECMEM="-m ,16M" 13PERFRECOPT="$PERFRECMEM -e cs_etm//u" 14 15TOOLS=$(dirname $0) 16DIR="$TOOLS/$TEST" 17BIN="$DIR/$TEST" 18# If the test tool/binary does not exist and is executable then skip the test 19if ! test -x "$BIN"; then exit 2; fi 20# If CoreSight is not available, skip the test 21perf list cs_etm | grep -q cs_etm || exit 2 22DATD="." 23# If the data dir env is set then make the data dir use that instead of ./ 24if test -n "$PERF_TEST_CORESIGHT_DATADIR"; then 25 DATD="$PERF_TEST_CORESIGHT_DATADIR"; 26fi 27# If the stat dir env is set then make the data dir use that instead of ./ 28STATD="." 29if test -n "$PERF_TEST_CORESIGHT_STATDIR"; then 30 STATD="$PERF_TEST_CORESIGHT_STATDIR"; 31fi 32 33# Called if the test fails - error code 1 34err() { 35 echo "$1" 36 exit 1 37} 38 39# Check that some statistics from our perf 40check_val_min() { 41 STATF="$4" 42 if test "$2" -lt "$3"; then 43 echo ", FAILED" >> "$STATF" 44 err "Sanity check number of $1 is too low ($2 < $3)" 45 fi 46} 47 48perf_dump_aux_verify() { 49 # Some basic checking that the AUX chunk contains some sensible data 50 # to see that we are recording something and at least a minimum 51 # amount of it. We should almost always see Fn packets in just about 52 # anything but certainly we will see some trace info and async 53 # packets 54 DUMP="$DATD/perf-tmp-aux-dump.txt" 55 perf report --stdio --dump -i "$1" | \ 56 grep -o -e I_ATOM_F -e I_ASYNC -e I_TRACE_INFO > "$DUMP" 57 # Simply count how many of these packets we find to see that we are 58 # producing a reasonable amount of data - exact checks are not sane 59 # as this is a lossy process where we may lose some blocks and the 60 # compiler may produce different code depending on the compiler and 61 # optimization options, so this is rough just to see if we're 62 # either missing almost all the data or all of it 63 ATOM_FX_NUM=$(grep -c I_ATOM_F "$DUMP") 64 ASYNC_NUM=$(grep -c I_ASYNC "$DUMP") 65 TRACE_INFO_NUM=$(grep -c I_TRACE_INFO "$DUMP") 66 rm -f "$DUMP" 67 68 # Arguments provide minimums for a pass 69 CHECK_FX_MIN="$2" 70 CHECK_ASYNC_MIN="$3" 71 CHECK_TRACE_INFO_MIN="$4" 72 73 # Write out statistics, so over time you can track results to see if 74 # there is a pattern - for example we have less "noisy" results that 75 # produce more consistent amounts of data each run, to see if over 76 # time any techinques to minimize data loss are having an effect or 77 # not 78 STATF="$STATD/stats-$TEST-$DATV.csv" 79 if ! test -f "$STATF"; then 80 echo "ATOM Fx Count, Minimum, ASYNC Count, Minimum, TRACE INFO Count, Minimum" > "$STATF" 81 fi 82 echo -n "$ATOM_FX_NUM, $CHECK_FX_MIN, $ASYNC_NUM, $CHECK_ASYNC_MIN, $TRACE_INFO_NUM, $CHECK_TRACE_INFO_MIN" >> "$STATF" 83 84 # Actually check to see if we passed or failed. 85 check_val_min "ATOM_FX" "$ATOM_FX_NUM" "$CHECK_FX_MIN" "$STATF" 86 check_val_min "ASYNC" "$ASYNC_NUM" "$CHECK_ASYNC_MIN" "$STATF" 87 check_val_min "TRACE_INFO" "$TRACE_INFO_NUM" "$CHECK_TRACE_INFO_MIN" "$STATF" 88 echo ", Ok" >> "$STATF" 89} 90 91perf_dump_aux_tid_verify() { 92 # Specifically crafted test will produce a list of Tread ID's to 93 # stdout that need to be checked to see that they have had trace 94 # info collected in AUX blocks in the perf data. This will go 95 # through all the TID's that are listed as CID=0xabcdef and see 96 # that all the Thread IDs the test tool reports are in the perf 97 # data AUX chunks 98 99 # The TID test tools will print a TID per stdout line that are being 100 # tested 101 TIDS=$(cat "$2") 102 # Scan the perf report to find the TIDs that are actually CID in hex 103 # and build a list of the ones found 104 FOUND_TIDS=$(perf report --stdio --dump -i "$1" | \ 105 grep -o "CID=0x[0-9a-z]\+" | sed 's/CID=//g' | \ 106 uniq | sort | uniq) 107 # No CID=xxx found - maybe your kernel is reporting these as 108 # VMID=xxx so look there 109 if test -z "$FOUND_TIDS"; then 110 FOUND_TIDS=$(perf report --stdio --dump -i "$1" | \ 111 grep -o "VMID=0x[0-9a-z]\+" | sed 's/VMID=//g' | \ 112 uniq | sort | uniq) 113 fi 114 115 # Iterate over the list of TIDs that the test says it has and find 116 # them in the TIDs found in the perf report 117 MISSING="" 118 for TID2 in $TIDS; do 119 FOUND="" 120 for TIDHEX in $FOUND_TIDS; do 121 TID=$(printf "%i" $TIDHEX) 122 if test "$TID" -eq "$TID2"; then 123 FOUND="y" 124 break 125 fi 126 done 127 if test -z "$FOUND"; then 128 MISSING="$MISSING $TID" 129 fi 130 done 131 if test -n "$MISSING"; then 132 err "Thread IDs $MISSING not found in perf AUX data" 133 fi 134} 135