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#!/bin/bash
# Test data symbol
# SPDX-License-Identifier: GPL-2.0
# Leo Yan <leo.yan@linaro.org>, 2022
skip_if_no_mem_event() {
perf mem record -e list 2>&1 | egrep -q 'available' && return 0
return 2
}
skip_if_no_mem_event || exit 2
# skip if there's no compiler
if ! [ -x "$(command -v cc)" ]; then
echo "skip: no compiler, install gcc"
exit 2
fi
TEST_PROGRAM=$(mktemp /tmp/__perf_test.program.XXXXX)
PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
check_result() {
# The memory report format is as below:
# 99.92% ... [.] buf1+0x38
result=$(perf mem report -i ${PERF_DATA} -s symbol_daddr -q 2>&1 |
awk '/buf1/ { print $4 }')
# Testing is failed if has no any sample for "buf1"
[ -z "$result" ] && return 1
while IFS= read -r line; do
# The "data1" and "data2" fields in structure "buf1" have
# offset "0x0" and "0x38", returns failure if detect any
# other offset value.
if [ "$line" != "buf1+0x0" ] && [ "$line" != "buf1+0x38" ]; then
return 1
fi
done <<< "$result"
return 0
}
cleanup_files()
{
echo "Cleaning up files..."
rm -f ${PERF_DATA}
rm -f ${TEST_PROGRAM}
}
trap cleanup_files exit term int
# compile test program
echo "Compiling test program..."
cat << EOF | cc -o ${TEST_PROGRAM} -x c -
typedef struct _buf {
char data1;
char reserved[55];
char data2;
} buf __attribute__((aligned(64)));
static buf buf1;
int main(void) {
for (;;) {
buf1.data1++;
buf1.data2 += buf1.data1;
}
return 0;
}
EOF
echo "Recording workload..."
# perf mem/c2c internally uses IBS PMU on AMD CPU which doesn't support
# user/kernel filtering and per-process monitoring, spin program on
# specific CPU and test in per-CPU mode.
is_amd=$(egrep -c 'vendor_id.*AuthenticAMD' /proc/cpuinfo)
if (($is_amd >= 1)); then
perf mem record -o ${PERF_DATA} -C 0 -- taskset -c 0 $TEST_PROGRAM &
else
perf mem record --all-user -o ${PERF_DATA} -- $TEST_PROGRAM &
fi
PERFPID=$!
sleep 1
kill $PERFPID
wait $PERFPID
check_result
exit $?
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