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[211.75.219.199]) by smtp.gmail.com with ESMTPSA id i15-20020a63584f000000b004393c5a8006sm1453127pgm.75.2022.10.06.03.10.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Oct 2022 03:10:49 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Namhyung Kim , Ravi Bangoria , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Leo Yan Subject: [PATCH v5] perf test: Introduce script for data symbol testing Date: Thu, 6 Oct 2022 18:10:39 +0800 Message-Id: <20221006101039.47870-1-leo.yan@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org This commit introduces a shell script for data symbol testing. The testing is designed a data structure with 64-byte alignment, it has two fields "data1" and "data2", and other fields are reserved. Using "perf mem" command, we can record and report memory samples for a self-contained workload with 1 second duration. If have no any memory sample for the data structure "buf1", it reports failure; and by checking the offset in structure "buf1", if any memory accessing is not for "data1" and "data2" fields, it means wrong data symbol parsing and returns failure. Signed-off-by: Leo Yan --- Changes from v4: - Remove the redundant argument "--" before CPU list (Namhyung). This patch is dependent on the fixing: https://lore.kernel.org/lkml/20221004200211.1444521-1-namhyung@kernel.org/ Changes from v3: - Add specific testing chunk for AMD CPUs (Ravi). tools/perf/tests/shell/test_data_symbol.sh | 93 ++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100755 tools/perf/tests/shell/test_data_symbol.sh diff --git a/tools/perf/tests/shell/test_data_symbol.sh b/tools/perf/tests/shell/test_data_symbol.sh new file mode 100755 index 000000000000..cd6eb54d235d --- /dev/null +++ b/tools/perf/tests/shell/test_data_symbol.sh @@ -0,0 +1,93 @@ +#!/bin/bash +# Test data symbol + +# SPDX-License-Identifier: GPL-2.0 +# Leo Yan , 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 $? -- 2.34.1