#!/bin/bash# Test data symbol (exclusive) # SPDX-License-Identifier: GPL-2.0# Leo Yan <leo.yan@linaro.org>, 2022 shelldir=$(dirname "$0") # shellcheck source=lib/perf_has_symbol.sh. "${shelldir}"/lib/perf_has_symbol.sh skip_if_no_mem_event() {	perf mem record -e list 2>&1 | grep -E -q 'available' && return 0	return 2} skip_if_no_mem_event || exit 2 skip_test_missing_symbol workload_datasym_buf1 TEST_PROGRAM="perf test -w datasym"PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)ERR_FILE=$(mktemp /tmp/__perf_test.stderr.XXXXX) check_result() {	# The memory report format is as below:	#    99.92%  ...  [.] workload_datasym_buf1+0x38	result=$(perf mem report -i ${PERF_DATA} -s symbol_daddr -q 2>&1 |		 awk '/workload_datasym_buf1/ { print $4 }') 	# Testing is failed if has no any sample for "workload_datasym_buf1"	[ -z "$result" ] && return 1 	while IFS= read -r line; do		# The "data1" and "data2" fields in structure		# "workload_datasym_buf1" have offset "0x0" and "0x38", returns		# failure if detect any other offset value.		if [ "$line" != "workload_datasym_buf1+0x0" ] && \		   [ "$line" != "workload_datasym_buf1+0x38" ]; then			return 1		fi	done <<< "$result" 	return 0} cleanup_files(){	echo "Cleaning up files..."	rm -f ${PERF_DATA}} trap cleanup_files exit term int echo "Recording workload..." is_amd=$(grep -E -c 'vendor_id.*AuthenticAMD' /proc/cpuinfo)if (($is_amd >= 1)); then	mem_events="$(perf mem record -v -e list 2>&1)"	if ! [[ "$mem_events" =~ ^mem\-ldst.*ibs_op/(.*)/.*available ]]; then		echo "ERROR: mem-ldst event is not matching"		exit 1	fi 	# --ldlat on AMD:	# o Zen4 and earlier uarch does not support ldlat	# o Even on supported platforms, it's disabled (--ldlat=0) by default.	ldlat=${BASH_REMATCH[1]}	if [[ -n $ldlat ]]; then		if ! [[ "$ldlat" =~ ldlat=0 ]]; then			echo "ERROR: ldlat not initialized to 0?"			exit 1		fi 		mem_events="$(perf mem record -v --ldlat=150 -e list 2>&1)"		if ! [[ "$mem_events" =~ ^mem-ldst.*ibs_op/ldlat=150/.*available ]]; then			echo "ERROR: --ldlat not honored?"			exit 1		fi	fi 	# perf mem/c2c internally uses IBS PMU on AMD CPU which doesn't	# support user/kernel filtering and per-process monitoring on older	# kernels, spin program on specific CPU and test in per-CPU mode.	perf mem record -vvv -o ${PERF_DATA} -C 0 -- taskset -c 0 $TEST_PROGRAM 2>"${ERR_FILE}"else	perf mem record -vvv --all-user -o ${PERF_DATA} -- $TEST_PROGRAM 2>"${ERR_FILE}"fi check_resultexit $?