1#!/bin/bash 2# Test data symbol 3 4# SPDX-License-Identifier: GPL-2.0 5# Leo Yan <leo.yan@linaro.org>, 2022 6 7skip_if_no_mem_event() { 8 perf mem record -e list 2>&1 | egrep -q 'available' && return 0 9 return 2 10} 11 12skip_if_no_mem_event || exit 2 13 14# skip if there's no compiler 15if ! [ -x "$(command -v cc)" ]; then 16 echo "skip: no compiler, install gcc" 17 exit 2 18fi 19 20TEST_PROGRAM=$(mktemp /tmp/__perf_test.program.XXXXX) 21PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX) 22 23check_result() { 24 # The memory report format is as below: 25 # 99.92% ... [.] buf1+0x38 26 result=$(perf mem report -i ${PERF_DATA} -s symbol_daddr -q 2>&1 | 27 awk '/buf1/ { print $4 }') 28 29 # Testing is failed if has no any sample for "buf1" 30 [ -z "$result" ] && return 1 31 32 while IFS= read -r line; do 33 # The "data1" and "data2" fields in structure "buf1" have 34 # offset "0x0" and "0x38", returns failure if detect any 35 # other offset value. 36 if [ "$line" != "buf1+0x0" ] && [ "$line" != "buf1+0x38" ]; then 37 return 1 38 fi 39 done <<< "$result" 40 41 return 0 42} 43 44cleanup_files() 45{ 46 echo "Cleaning up files..." 47 rm -f ${PERF_DATA} 48 rm -f ${TEST_PROGRAM} 49} 50 51trap cleanup_files exit term int 52 53# compile test program 54echo "Compiling test program..." 55cat << EOF | cc -o ${TEST_PROGRAM} -x c - 56typedef struct _buf { 57 char data1; 58 char reserved[55]; 59 char data2; 60} buf __attribute__((aligned(64))); 61 62static buf buf1; 63 64int main(void) { 65 for (;;) { 66 buf1.data1++; 67 buf1.data2 += buf1.data1; 68 } 69 return 0; 70} 71EOF 72 73echo "Recording workload..." 74 75# perf mem/c2c internally uses IBS PMU on AMD CPU which doesn't support 76# user/kernel filtering and per-process monitoring, spin program on 77# specific CPU and test in per-CPU mode. 78is_amd=$(egrep -c 'vendor_id.*AuthenticAMD' /proc/cpuinfo) 79if (($is_amd >= 1)); then 80 perf mem record -o ${PERF_DATA} -C 0 -- taskset -c 0 $TEST_PROGRAM & 81else 82 perf mem record --all-user -o ${PERF_DATA} -- $TEST_PROGRAM & 83fi 84 85PERFPID=$! 86 87sleep 1 88 89kill $PERFPID 90wait $PERFPID 91 92check_result 93exit $? 94