| Current File : //lib/modules/6.8.0-60-generic/build/tools/perf/tests/shell/lib/coresight.sh |
# SPDX-License-Identifier: GPL-2.0
# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
# This is sourced from a driver script so no need for #!/bin... etc. at the
# top - the assumption below is that it runs as part of sourcing after the
# test sets up some basic env vars to say what it is.
# This currently works with ETMv4 / ETF not any other packet types at thi
# point. This will need changes if that changes.
# perf record options for the perf tests to use
PERFRECMEM="-m ,16M"
PERFRECOPT="$PERFRECMEM -e cs_etm//u"
TOOLS=$(dirname $0)
DIR="$TOOLS/$TEST"
BIN="$DIR/$TEST"
# If the test tool/binary does not exist and is executable then skip the test
if ! test -x "$BIN"; then exit 2; fi
# If CoreSight is not available, skip the test
perf list cs_etm | grep -q cs_etm || exit 2
DATD="."
# If the data dir env is set then make the data dir use that instead of ./
if test -n "$PERF_TEST_CORESIGHT_DATADIR"; then
DATD="$PERF_TEST_CORESIGHT_DATADIR";
fi
# If the stat dir env is set then make the data dir use that instead of ./
STATD="."
if test -n "$PERF_TEST_CORESIGHT_STATDIR"; then
STATD="$PERF_TEST_CORESIGHT_STATDIR";
fi
# Called if the test fails - error code 1
err() {
echo "$1"
exit 1
}
# Check that some statistics from our perf
check_val_min() {
STATF="$4"
if test "$2" -lt "$3"; then
echo ", FAILED" >> "$STATF"
err "Sanity check number of $1 is too low ($2 < $3)"
fi
}
perf_dump_aux_verify() {
# Some basic checking that the AUX chunk contains some sensible data
# to see that we are recording something and at least a minimum
# amount of it. We should almost always see Fn packets in just about
# anything but certainly we will see some trace info and async
# packets
DUMP="$DATD/perf-tmp-aux-dump.txt"
perf report --stdio --dump -i "$1" | \
grep -o -e I_ATOM_F -e I_ASYNC -e I_TRACE_INFO > "$DUMP"
# Simply count how many of these packets we find to see that we are
# producing a reasonable amount of data - exact checks are not sane
# as this is a lossy process where we may lose some blocks and the
# compiler may produce different code depending on the compiler and
# optimization options, so this is rough just to see if we're
# either missing almost all the data or all of it
ATOM_FX_NUM=$(grep -c I_ATOM_F "$DUMP")
ASYNC_NUM=$(grep -c I_ASYNC "$DUMP")
TRACE_INFO_NUM=$(grep -c I_TRACE_INFO "$DUMP")
rm -f "$DUMP"
# Arguments provide minimums for a pass
CHECK_FX_MIN="$2"
CHECK_ASYNC_MIN="$3"
CHECK_TRACE_INFO_MIN="$4"
# Write out statistics, so over time you can track results to see if
# there is a pattern - for example we have less "noisy" results that
# produce more consistent amounts of data each run, to see if over
# time any techinques to minimize data loss are having an effect or
# not
STATF="$STATD/stats-$TEST-$DATV.csv"
if ! test -f "$STATF"; then
echo "ATOM Fx Count, Minimum, ASYNC Count, Minimum, TRACE INFO Count, Minimum" > "$STATF"
fi
echo -n "$ATOM_FX_NUM, $CHECK_FX_MIN, $ASYNC_NUM, $CHECK_ASYNC_MIN, $TRACE_INFO_NUM, $CHECK_TRACE_INFO_MIN" >> "$STATF"
# Actually check to see if we passed or failed.
check_val_min "ATOM_FX" "$ATOM_FX_NUM" "$CHECK_FX_MIN" "$STATF"
check_val_min "ASYNC" "$ASYNC_NUM" "$CHECK_ASYNC_MIN" "$STATF"
check_val_min "TRACE_INFO" "$TRACE_INFO_NUM" "$CHECK_TRACE_INFO_MIN" "$STATF"
echo ", Ok" >> "$STATF"
}
perf_dump_aux_tid_verify() {
# Specifically crafted test will produce a list of Tread ID's to
# stdout that need to be checked to see that they have had trace
# info collected in AUX blocks in the perf data. This will go
# through all the TID's that are listed as CID=0xabcdef and see
# that all the Thread IDs the test tool reports are in the perf
# data AUX chunks
# The TID test tools will print a TID per stdout line that are being
# tested
TIDS=$(cat "$2")
# Scan the perf report to find the TIDs that are actually CID in hex
# and build a list of the ones found
FOUND_TIDS=$(perf report --stdio --dump -i "$1" | \
grep -o "CID=0x[0-9a-z]\+" | sed 's/CID=//g' | \
uniq | sort | uniq)
# No CID=xxx found - maybe your kernel is reporting these as
# VMID=xxx so look there
if test -z "$FOUND_TIDS"; then
FOUND_TIDS=$(perf report --stdio --dump -i "$1" | \
grep -o "VMID=0x[0-9a-z]\+" | sed 's/VMID=//g' | \
uniq | sort | uniq)
fi
# Iterate over the list of TIDs that the test says it has and find
# them in the TIDs found in the perf report
MISSING=""
for TID2 in $TIDS; do
FOUND=""
for TIDHEX in $FOUND_TIDS; do
TID=$(printf "%i" $TIDHEX)
if test "$TID" -eq "$TID2"; then
FOUND="y"
break
fi
done
if test -z "$FOUND"; then
MISSING="$MISSING $TID"
fi
done
if test -n "$MISSING"; then
err "Thread IDs $MISSING not found in perf AUX data"
fi
}