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