Message-ID: <CA+icZUU_ew7pzWJJZLbj1xsU6MQTPrj8tkFfDhNdTDRQfGUBMQ@mail.gmail.com>
Date:   Sun, 29 Jan 2023 10:58:45 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        Ian Rogers <irogers@...gle.com>
Cc:     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>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        llvm@...ts.linux.dev, Ben Hutchings <benh@...ian.org>
Subject: [6.1.7][6.2-rc5] perf all metrics test: FAILED!

[ CC LLVM linux folks + Ben from Debian kernel team ]

Hi,

I am playing with LLVM version 16.0.0-rc1 which was released yesterday and PERF.

After building my selfmade LLVM toolchain, I built perf and run some
perf tests here on my Intel SandyBridge CPU (details see below).

perf all metrics test: FAILED!

...with both Debian's perf version 6.1.7 and my selfmade version 6.2-rc5.

Just noticed:

Couldn't bump rlimit(MEMLOCK), failures may take place when creating
BPF maps, etc

Run the below tests with `sudo` - made this go away - still FAILED.

But maybe I am missing to activate some sysfs/debug or whatever other stuff?

Last perf version which was OK:

~/bin/perf -v
perf version 6.0.0

echo "linux-perf: Adjust limited access to performance monitoring and
observability operations"
echo 0 | sudo tee /proc/sys/kernel/kptr_restrict
/proc/sys/kernel/perf_event_paranoid
0

~/bin/perf test 10 86 92 93 94 95
10: PMU events                                                      :
10.1: PMU event table sanity                                        : Ok
10.2: PMU event map aliases                                         : Ok
10.3: Parsing of PMU event table metrics                            : Ok
10.4: Parsing of PMU event table metrics with fake PMUs             : Ok
86: perf record tests                                               : Ok
92: perf stat tests                                                 : Ok
93: perf all metricgroups test                                      : Ok
94: perf all metrics test                                           : Ok
95: perf all PMU test                                               : Ok

echo 1 | sudo tee /proc/sys/kernel/kptr_restrict
/proc/sys/kernel/perf_event_paranoid
echo "linux-perf: Reset limited access to performance monitoring and
observability operations"

If you need further information, please let me know.

Thanks.

Regards,
-Sedat-

P.S. Instructions

[ REPRODUCER ]

LLVM_MVER="16"

# Debian LLVM
##LLVM_TOOLCHAIN_PATH="/usr/lib/llvm-${LLVM_MVER}/bin"
# Selfmade LLVM
LLVM_TOOLCHAIN_PATH="/opt/llvm/bin"
if [ -d ${LLVM_TOOLCHAIN_PATH} ]; then
   export PATH="${LLVM_TOOLCHAIN_PATH}:${PATH}"
fi

PYTHON_VER="3.11"
MAKE="make"
MAKE_OPTS="V=1 -j1 HOSTCC=clang-$LLVM_MVER HOSTLD=ld.lld
HOSTAR=llvm-ar CC=clang-$LLVM_MVER LD=ld.lld AR=llvm-ar
STRIP=llvm-strip"

echo "LLVM MVER ........ $LLVM_MVER"
echo "Path settings .... $PATH"
echo "Python version ... $PYTHON_VER"
echo "make line ........ $MAKE $MAKE_OPTS"

LANG=C LC_ALL=C make -C tools/perf clean 2>&1 | tee ../make-log_perf-clean.txt

LANG=C LC_ALL=C $MAKE $MAKE_OPTS -C tools/perf
PYTHON=python${PYTHON_VER} install-bin 2>&1 | tee
../make-log_perf-install_bin_python${PYTHON_VER}_llvm${LLVM_MVER}.txt


[ TESTS ]

[ TESTS - START ]

echo 0 | sudo tee /proc/sys/kernel/kptr_restrict
/proc/sys/kernel/perf_event_paranoid

[ TESTS - DEBIAN ]

/usr/bin/perf -v
perf version 6.1.7

/usr/bin/perf test 10 92 98 99 100 101

 10: PMU events                                                      :
 10.1: PMU event table sanity                                        : Ok
 10.2: PMU event map aliases                                         : Ok
 10.3: Parsing of PMU event table metrics                            : Ok
 10.4: Parsing of PMU event table metrics with fake PMUs             : Ok
 92: perf record tests                                               : Ok
 98: perf stat tests                                                 : Ok
 99: perf all metricgroups test                                      : Ok
100: perf all metrics test                                           : FAILED!
101: perf all PMU test                                               : Ok

[ TESTS - DILEKS ]

~/bin/perf -v
perf version 6.2.0-rc5

~/bin/perf test 7 87 93 94 95 96

  7: PMU events                                                      :
  7.1: PMU event table sanity                                        : Ok
  7.2: PMU event map aliases                                         : Ok
  7.3: Parsing of PMU event table metrics                            : Ok
  7.4: Parsing of PMU event table metrics with fake PMUs             : Ok
 87: perf record tests                                               : Ok
 93: perf stat tests                                                 : Ok
 94: perf all metricgroups test                                      : Ok
 95: perf all metrics test                                           : FAILED!
 96: perf all PMU test                                               : Ok

[ TESTS - FAILED ]

/usr/bin/perf test --verbose 100 2>&1 | tee
perf-test-verbose-100-perf-all-metrics-test_debian-perf-6-1-7.txt

~/bin/perf test --verbose 95 2>&1 | tee
perf-test-verbose-95-perf-all-metrics-test_dileks-perf-6-2-rc5.txt

[ TESTS - STOP ]

echo 1 | sudo tee /proc/sys/kernel/kptr_restrict
/proc/sys/kernel/perf_event_paranoid

- EOT -

View attachment "debian-perf-6-1-7_test-verbose-100-perf-all-metrics-test.txt" of type "text/plain" (3732 bytes)

View attachment "dileks-perf-6-2-rc5-test-verbose-95-perf-all-metrics-test.txt" of type "text/plain" (3816 bytes)

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