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From:   Ian Rogers <irogers@google.com>
Date:   Wed, 20 Oct 2021 08:51:04 -0700
Message-ID: <CAP-5=fVCqisvy8-Obx9TA3Zgi_BJdefYr-g4LCsuy1KKb2xtBQ@mail.gmail.com>
Subject: Re: [PATCH v2 00/22] Start aligning perf test with kunit style
To:     Jiri Olsa <jolsa@redhat.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Jin Yao <yao.jin@linux.intel.com>,
        John Garry <john.garry@huawei.com>,
        "Paul A . Clarke" <pc@us.ibm.com>,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
        Brendan Higgins <brendanhiggins@google.com>,
        Daniel Latypov <dlatypov@google.com>,
        David Gow <davidgow@google.com>, eranian@google.com
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On Wed, Oct 20, 2021 at 5:14 AM Jiri Olsa <jolsa@redhat.com> wrote:
>
> On Wed, Oct 13, 2021 at 10:45:42AM -0700, Ian Rogers wrote:
> > Perf test uses its own structs and code layout that differs from kunit
> > that was more recently introduced to the kernel. Besides consistency,
> > it is hoped that moving in the direction of kunit style will enable
> > reuse of infrastructure like test output formatting for continuous
> > testing systems. For example:
> > https://lore.kernel.org/linux-kselftest/CA+GJov6tdjvY9x12JsJT14qn6c7NVi=
JxqaJk+r-K1YJzPggFDQ@mail.gmail.com/
> >
> > The motivation for this restructuring comes from wanting to be able to
> > tag tests with a size:
> > https://lore.kernel.org/linux-perf-users/CAP-5=3DfWmGyuqFKc-EMP3rbmTkjZ=
3MS+YSajGZfeRMc38HS82gw@mail.gmail.com/
> > To have more exhaustive and slower running tests.  This isn't
> > something kunit currently supports, nor is the execution of python and
> > shell tests, but it seems sensible to work on an approach with kunit
> > rather to invent a new wheel inside of perf.
> >
> > These initial patches are just refactoring the main test suite
> > definitions to be in a more kunit style. Kunit isn't depended upon, it
> > is hoped that this can be done in later patches for the sake of
> > consistency.
> >
> > v2. Gets to a point of the perf test test suite/case structs being
> >     close facsimiles of the kunit ones. It also addresses feedback on
> >     the v1 RFC, in particular from Jiri Olsa <jolsa@redhat.com>.
>
> hi,
> when I compile with DEBUG=3D1 it's ok, but with just make:
>
> [root@krava perf]# ./perf test
> Segmentation fault (core dumped)
> [root@krava perf]# gdb ./perf
> GNU gdb (GDB) Fedora 10.2-4.fc33
> Copyright (C) 2021 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.h=
tml>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> Type "show copying" and "show warranty" for details.
> This GDB was configured as "x86_64-redhat-linux-gnu".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <https://www.gnu.org/software/gdb/bugs/>.
> Find the GDB manual and other documentation resources online at:
>     <http://www.gnu.org/software/gdb/documentation/>.
>
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from ./perf...
> (gdb) r test
> Starting program: /home/jolsa/kernel/linux-perf/tools/perf/perf test
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
>
> Program received signal SIGSEGV, Segmentation fault.
> __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
> 96              VPCMPEQ (%rdi), %ymm0, %ymm1
> Missing separate debuginfos, use: dnf debuginfo-install bzip2-libs-1.0.8-=
4.fc33.x86_64 cyrus-sasl-lib-2.1.27-6.fc33.x86_64 elfutils-debuginfod-clien=
t-0.185-2.fc33.x86_64 elfutils-libelf-0.185-2.fc33.x86_64 elfutils-libs-0.1=
85-2.fc33.x86_64 keyutils-libs-1.6.1-1.fc33.x86_64 krb5-libs-1.18.2-31.fc33=
.x86_64 libbabeltrace-1.5.8-3.fc33.x86_64 libbrotli-1.0.9-3.fc33.x86_64 lib=
cap-2.48-2.fc33.x86_64 libcom_err-1.45.6-4.fc33.x86_64 libgcc-10.3.1-1.fc33=
.x86_64 libidn2-2.3.2-1.fc33.x86_64 libnghttp2-1.43.0-1.fc33.x86_64 libpsl-=
0.21.1-2.fc33.x86_64 libselinux-3.1-2.fc33.x86_64 libssh-0.9.6-1.fc33.x86_6=
4 libunistring-0.9.10-9.fc33.x86_64 libunwind-1.4.0-4.fc33.x86_64 libuuid-2=
.36.1-1.fc33.x86_64 libxcrypt-4.4.26-2.fc33.x86_64 numactl-libs-2.0.14-1.fc=
33.x86_64 openldap-2.4.50-5.fc33.x86_64 openssl-libs-1.1.1l-2.fc33.x86_64 p=
cre-8.44-2.fc33.x86_64 perl-libs-5.32.1-471.fc33.x86_64 popt-1.18-2.fc33.x8=
6_64 python2.7-2.7.18-15.fc33.x86_64 slang-2.3.2-8.fc33.x86_64 xz-libs-5.2.=
5-4.fc33.x86_64 zlib-1.2.11-23.fc33.x86_64
> (gdb) bt
> #0  __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
> #1  0x00000000004a3848 in __cmd_test (skiplist=3D0x0, argv=3D0x7fffffffd6=
c0, argc=3D0) at tests/builtin-test.c:150
> #2  cmd_test (argc=3D0, argv=3D0x7fffffffd6c0) at tests/builtin-test.c:62=
8
> #3  0x00000000004cc47b in run_builtin (p=3Dp@entry=3D0xa7cda8 <commands+5=
52>, argc=3Dargc@entry=3D1, argv=3Dargv@entry=3D0x7fffffffd6c0) at perf.c:3=
13
> #4  0x00000000004397ae in handle_internal_command (argv=3D0x7fffffffd6c0,=
 argc=3D1) at perf.c:365
> #5  run_argv (argv=3D<synthetic pointer>, argcp=3D<synthetic pointer>) at=
 perf.c:409
> #6  main (argc=3D1, argv=3D0x7fffffffd6c0) at perf.c:539
> (gdb)

Thanks, I'll take a look.

> also during the metric test (in make DEBUG=3D1 build) it runs the
> perf bench synthesize and it takes forever ;-)
>
>   89: perf all metrics test
>
> that might be another patchset I haven't checked,
> but I thought we already agreed not to do that ;-)

The PMU test was merged, and that may be the very slow running one.
The metric tests run with /bin/true, but if they get "not counted" in
the output they try again with perf bench. It generally runs in
O(seconds) for me, but maybe it is slower on a loaded machine. There
may be some middle sized thing between "perf bench" and true that
gives us enough counts for the tests.

Thanks,
Ian

> jirka
>
> >
> > v1. Built/tested on x86.
> >
> > Ian Rogers (22):
> >   perf test: Use macro for "suite" declarations
> >   perf test: Use macro for "suite" definitions
> >   perf test: Make each test/suite its own struct.
> >   perf test: Move each test suite struct to its test
> >   perf test: Rename struct test to test_suite
> >   perf test: Add helper functions for abstraction.
> >   perf test: Add test case struct.
> >   perf test: Add skip reason to test case.
> >   perf test: Convert pfm tests to use test cases.
> >   perf test: Convert pmu event tests to test cases.
> >   perf test: Convert watch point tests to test cases.
> >   perf test: Convert clang tests to test cases.
> >   perf test: Convert bpf tests to test cases.
> >   perf test: Convert llvm tests to test cases.
> >   perf test: Remove now unused subtest helpers
> >   perf test: bp tests use test case
> >   perf test: Convert time to tsc test to test case.
> >   perf test: Remove non test case style support.
> >   perf test: BP tests, remove is_supported use
> >   perf test: TSC test, remove is_supported use
> >   perf test: Remove is_supported function
> >   perf test: Remove skip_if_fail
> >
> >  tools/perf/arch/arm/include/arch-tests.h      |   2 +-
> >  tools/perf/arch/arm/tests/arch-tests.c        |  18 +-
> >  tools/perf/arch/arm/tests/vectors-page.c      |   2 +-
> >  tools/perf/arch/arm64/include/arch-tests.h    |   2 +-
> >  tools/perf/arch/arm64/tests/arch-tests.c      |  11 +-
> >  tools/perf/arch/powerpc/include/arch-tests.h  |   2 +-
> >  tools/perf/arch/powerpc/tests/arch-tests.c    |  12 +-
> >  tools/perf/arch/x86/include/arch-tests.h      |  14 +-
> >  tools/perf/arch/x86/tests/arch-tests.c        |  46 +-
> >  tools/perf/arch/x86/tests/bp-modify.c         |   2 +-
> >  tools/perf/arch/x86/tests/insn-x86.c          |   2 +-
> >  tools/perf/arch/x86/tests/intel-cqm.c         |   2 +-
> >  .../x86/tests/intel-pt-pkt-decoder-test.c     |   2 +-
> >  tools/perf/arch/x86/tests/rdpmc.c             |   2 +-
> >  tools/perf/arch/x86/tests/sample-parsing.c    |   2 +-
> >  tools/perf/tests/api-io.c                     |   6 +-
> >  tools/perf/tests/attr.c                       |   4 +-
> >  tools/perf/tests/backward-ring-buffer.c       |   4 +-
> >  tools/perf/tests/bitmap.c                     |   4 +-
> >  tools/perf/tests/bp_account.c                 |  36 +-
> >  tools/perf/tests/bp_signal.c                  |  34 +-
> >  tools/perf/tests/bp_signal_overflow.c         |   9 +-
> >  tools/perf/tests/bpf.c                        |  69 ++-
> >  tools/perf/tests/builtin-test.c               | 578 ++++++------------
> >  tools/perf/tests/clang.c                      |  54 +-
> >  tools/perf/tests/code-reading.c               |   4 +-
> >  tools/perf/tests/cpumap.c                     |  10 +-
> >  tools/perf/tests/demangle-java-test.c         |   4 +-
> >  tools/perf/tests/demangle-ocaml-test.c        |   4 +-
> >  tools/perf/tests/dlfilter-test.c              |   4 +-
> >  tools/perf/tests/dso-data.c                   |  10 +-
> >  tools/perf/tests/dwarf-unwind.c               |   5 +-
> >  tools/perf/tests/event-times.c                |   4 +-
> >  tools/perf/tests/event_update.c               |   4 +-
> >  tools/perf/tests/evsel-roundtrip-name.c       |   5 +-
> >  tools/perf/tests/evsel-tp-sched.c             |   5 +-
> >  tools/perf/tests/expand-cgroup.c              |   6 +-
> >  tools/perf/tests/expr.c                       |   4 +-
> >  tools/perf/tests/fdarray.c                    |   7 +-
> >  tools/perf/tests/genelf.c                     |   6 +-
> >  tools/perf/tests/hists_cumulate.c             |   4 +-
> >  tools/perf/tests/hists_filter.c               |   4 +-
> >  tools/perf/tests/hists_link.c                 |   4 +-
> >  tools/perf/tests/hists_output.c               |   4 +-
> >  tools/perf/tests/is_printable_array.c         |   4 +-
> >  tools/perf/tests/keep-tracking.c              |   4 +-
> >  tools/perf/tests/kmod-path.c                  |   4 +-
> >  tools/perf/tests/llvm.c                       |  74 ++-
> >  tools/perf/tests/maps.c                       |   4 +-
> >  tools/perf/tests/mem.c                        |   4 +-
> >  tools/perf/tests/mem2node.c                   |   4 +-
> >  tools/perf/tests/mmap-basic.c                 |   4 +-
> >  tools/perf/tests/mmap-thread-lookup.c         |   4 +-
> >  tools/perf/tests/openat-syscall-all-cpus.c    |   5 +-
> >  tools/perf/tests/openat-syscall-tp-fields.c   |   5 +-
> >  tools/perf/tests/openat-syscall.c             |   5 +-
> >  tools/perf/tests/parse-events.c               |   4 +-
> >  tools/perf/tests/parse-metric.c               |   4 +-
> >  tools/perf/tests/parse-no-sample-id-all.c     |   5 +-
> >  tools/perf/tests/pe-file-parsing.c            |   6 +-
> >  tools/perf/tests/perf-hooks.c                 |   4 +-
> >  tools/perf/tests/perf-record.c                |   4 +-
> >  tools/perf/tests/perf-time-to-tsc.c           |  30 +-
> >  tools/perf/tests/pfm.c                        |  63 +-
> >  tools/perf/tests/pmu-events.c                 |  73 +--
> >  tools/perf/tests/pmu.c                        |   4 +-
> >  tools/perf/tests/python-use.c                 |   4 +-
> >  tools/perf/tests/sample-parsing.c             |   4 +-
> >  tools/perf/tests/sdt.c                        |   6 +-
> >  tools/perf/tests/stat.c                       |  11 +-
> >  tools/perf/tests/sw-clock.c                   |   4 +-
> >  tools/perf/tests/switch-tracking.c            |   4 +-
> >  tools/perf/tests/task-exit.c                  |   4 +-
> >  tools/perf/tests/tests.h                      | 238 ++++----
> >  tools/perf/tests/thread-map.c                 |  10 +-
> >  tools/perf/tests/thread-maps-share.c          |   4 +-
> >  tools/perf/tests/time-utils-test.c            |   4 +-
> >  tools/perf/tests/topology.c                   |   4 +-
> >  tools/perf/tests/unit_number__scnprintf.c     |   4 +-
> >  tools/perf/tests/vmlinux-kallsyms.c           |   5 +-
> >  tools/perf/tests/wp.c                         | 122 +---
> >  tools/perf/util/c++/clang-c.h                 |   8 +-
> >  tools/perf/util/c++/clang-test.cpp            |   6 +-
> >  83 files changed, 811 insertions(+), 966 deletions(-)
> >
> > --
> > 2.33.0.882.g93a45727a2-goog
> >
>