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[18.144.7.244]) by smtp.gmail.com with ESMTPSA id y2-20020aa793c2000000b0052d27ccea39sm3986012pff.19.2022.08.05.20.32.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Aug 2022 20:32:38 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Ian Rogers , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Leo Yan Subject: [PATCH v2] perf test: Introduce script for data symbol testing Date: Sat, 6 Aug 2022 11:32:34 +0800 Message-Id: <20220806033234.121781-1-leo.yan@linaro.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 v1: - Removed "killall" since the test has no child process (Ian); - Used "char" instead of "long" in the buf structure. tools/perf/tests/shell/test_data_symbol.sh | 92 ++++++++++++++++++++++ 1 file changed, 92 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..d007513ecfbe --- /dev/null +++ b/tools/perf/tests/shell/test_data_symbol.sh @@ -0,0 +1,92 @@ +#!/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 "$(command -v cc)" ]; then + echo "skip: no compiler, install gcc" + exit 2 +fi + +TEST_PROGRAM_SOURCE=3D$(mktemp /tmp/__perf_test.program.XXXXX.c) +TEST_PROGRAM=3D$(mktemp /tmp/__perf_test.program.XXXXX) +PERF_DATA=3D$(mktemp /tmp/__perf_test.perf.data.XXXXX) + +check_result() { + # The memory report format is as below: + # 99.92% ... [.] buf1+0x38 ... + result=3D$(perf mem report -i ${PERF_DATA} --stdio 2>&1 | egrep "buf1" | \ + awk '{ for (i =3D 1; i <=3D NF; i++) { if ($i ~ /^buf1/) { print $i; bre= ak; } } }') + + # Testing is failed if has no any sample for "buf1" + [ -z "$result" ] && return 1 + + while IFS=3D 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 [ "$line" !=3D "buf1+0x0" ] && [ "$line" !=3D "buf1+0x38" ]; then + return 1 + fi + done <<< "$result" + + return 0 +} + +cleanup_files() +{ + echo "Cleaning up files..." + rm -f ${PERF_DATA} + rm -f ${TEST_PROGRAM_SOURCE} + rm -f ${TEST_PROGRAM} +} + +trap cleanup_files exit term int + +# compile test program +cat << EOF > $TEST_PROGRAM_SOURCE +#include +#include +#include + +typedef struct _buf { + char data1; + char reserved[55]; + char data2; +} buf __attribute__((aligned(64))); + +static buf buf1; + +int main() { + int i; + for (;;) { + buf1.data1++; + buf1.data2 +=3D buf1.data1; + } + return 0; +} +EOF + +echo "Compiling test program..." +cc $TEST_PROGRAM_SOURCE -o $TEST_PROGRAM || exit 1 + +echo "Recording workload..." +perf mem record --all-user -o ${PERF_DATA} -- $TEST_PROGRAM & +PERFPID=3D$! + +sleep 1 + +kill $PERFPID +wait $PERFPID + +check_result +exit $? --=20 2.25.1