linux-kernel - Re: [PATCH v2 2/2] perf test: Introduce script for java symbol testing

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Date:   Tue, 20 Sep 2022 14:47:05 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Leo Yan <leo.yan@...aro.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-perf-users <linux-perf-users@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v2 2/2] perf test: Introduce script for java symbol testing

Hi Leo,

On Sat, Sep 17, 2022 at 8:15 PM Leo Yan <leo.yan@...aro.org> wrote:
>
> This commit introduces a script for testing java symbols.
>
> The test records java program, inject samples with JIT samples, check
> specific JIT symbols in the report, the test will pass only when these
> two symbols are detected.
>
> Suggested-by: Ian Rogers <irogers@...gle.com>
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  tools/perf/tests/shell/test_java_symbol.sh | 69 ++++++++++++++++++++++
>  1 file changed, 69 insertions(+)
>  create mode 100755 tools/perf/tests/shell/test_java_symbol.sh
>
> diff --git a/tools/perf/tests/shell/test_java_symbol.sh b/tools/perf/tests/shell/test_java_symbol.sh
> new file mode 100755
> index 000000000000..d96fea405ea9
> --- /dev/null
> +++ b/tools/perf/tests/shell/test_java_symbol.sh
> @@ -0,0 +1,69 @@
> +#!/bin/bash
> +# Test java symbol
> +
> +# SPDX-License-Identifier: GPL-2.0
> +# Leo Yan <leo.yan@...aro.org>, 2022
> +
> +PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
> +PERF_INJ_DATA=$(mktemp /tmp/__perf_test.perf.data.inj.XXXXX)
> +
> +cleanup_files()
> +{
> +       echo "Cleaning up files..."
> +       rm -f ${PERF_DATA}
> +       rm -f ${PERF_INJ_DATA}
> +}
> +
> +trap cleanup_files exit term int
> +
> +if [ -e "$PWD/tools/perf/libperf-jvmti.so" ]; then
> +       LIBJVMTI=$PWD/tools/perf/libperf-jvmti.so
> +elif [ -e "$PWD/libperf-jvmti.so" ]; then
> +       LIBJVMTI=$PWD/libperf-jvmti.so
> +elif [ -e "$PREFIX/lib64/libperf-jvmti.so" ]; then
> +       LIBJVMTI=$PREFIX/lib64/libperf-jvmti.so
> +elif [ -e "$PREFIX/lib/libperf-jvmti.so" ]; then
> +       LIBJVMTI=$PREFIX/lib/libperf-jvmti.so
> +if [ -e "/usr/lib/linux-tools-$(uname -a | awk '{ print $3 }' | sed -r 's/-generic//')/libperf-jvmti.so" ]; then

s/if/elif/ ?

> +       LIBJVMTI=/usr/lib/linux-tools-$(uname -a | awk '{ print $3 }' | sed -r 's/-generic//')/libperf-jvmti.so
> +else
> +       echo "Fail to find libperf-jvmti.so"
> +       # JVMTI is a build option, skip the test if fail to find lib
> +       exit 2
> +fi
> +
> +cat <<EOF | perf record -k 1 -o $PERF_DATA jshell -s -J-agentpath:$LIBJVMTI

Wouldn't it check if jshell is available first?

Thanks,
Namhyung


> +int fib(int x) {
> +       return x > 1 ? fib(x - 2) + fib(x - 1) : 1;
> +}
> +
> +int q = 0;
> +
> +for (int i = 0; i < 10; i++)
> +       q += fib(i);
> +
> +System.out.println(q);
> +EOF
> +
> +if [ $? -ne 0 ]; then
> +       echo "Fail to record for java program"
> +       exit 1
> +fi
> +
> +if ! perf inject -i $PERF_DATA -o $PERF_INJ_DATA -j; then
> +       echo "Fail to inject samples"
> +       exit 1
> +fi
> +
> +# Below is an example of the instruction samples reporting:
> +#   8.18%  jshell           jitted-50116-29.so    [.] Interpreter
> +#   0.75%  Thread-1         jitted-83602-1670.so  [.] jdk.internal.jimage.BasicImageReader.getString(int)
> +perf report --stdio -i ${PERF_INJ_DATA} 2>&1 | \
> +       egrep " +[0-9]+\.[0-9]+% .* (Interpreter|jdk\.internal).*" > /dev/null 2>&1
> +
> +if [ $? -ne 0 ]; then
> +       echo "Fail to find java symbols"
> +       exit 1
> +fi
> +
> +exit 0
> --
> 2.34.1
>