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References: <20220309122859.31487-1-carsten.haitzler@foss.arm.com>
 <20220309122859.31487-3-carsten.haitzler@foss.arm.com> <20220530162730.GA480245@p14s>
In-Reply-To: <20220530162730.GA480245@p14s>
From:   Mathieu Poirier <mathieu.poirier@linaro.org>
Date:   Mon, 30 May 2022 10:47:26 -0600
Message-ID: <CANLsYkx=QfvkM4H2JAAKNuEAZfqv3248woJUdPuDu5Y-4_ojig@mail.gmail.com>
Subject: Re: [PATCH 3/3] perf test: Add coresight tests to guage quality of
 data generated
To:     carsten.haitzler@foss.arm.com
Cc:     linux-kernel@vger.kernel.org, coresight@lists.linaro.org,
        suzuki.poulose@arm.com, mike.leach@linaro.org, leo.yan@linaro.org,
        linux-perf-users@vger.kernel.org, acme@kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Mon, 30 May 2022 at 10:27, Mathieu Poirier
<mathieu.poirier@linaro.org> wrote:
>
> On Wed, Mar 09, 2022 at 12:28:59PM +0000, carsten.haitzler@foss.arm.com wrote:
> > From: Carsten Haitzler <carsten.haitzler@arm.com>
> >
> > This adds a test harness and tests to run perf record and examine the
> > resuling output when coresight is enabled on arm64 and check the
> > resulting quality of the output as part of perf test. These tests use
> > various tools to produce output from perf record then measure some key
> > specific aspects of that data to see if the data exists at all and
> > contains key aspects such as measuring some data for every thread of
> > a test or produces sufficient data for large exeuction runs of a large
> > executable. etc.
> >
> > Signed-off-by: Carsten Haitzler <carsten.haitzler@arm.com>
> > ---
> >  MAINTAINERS                                   |   4 +
> >  tools/perf/.gitignore                         |   6 +-
> >  tools/perf/Documentation/arm-coresight.txt    | 140 ++++++++++++++++++
> >  tools/perf/Makefile.perf                      |  14 +-
> >  tools/perf/tests/shell/coresight/Makefile     |  30 ++++
> >  .../tests/shell/coresight/Makefile.miniconfig |  23 +++
> >  .../shell/coresight/asm_pure_loop/.gitignore  |   1 +
> >  .../shell/coresight/asm_pure_loop/Makefile    |  30 ++++
> >  .../coresight/asm_pure_loop/asm_pure_loop.S   |  28 ++++
> >  .../shell/coresight/memcpy_thread/.gitignore  |   1 +
> >  .../shell/coresight/memcpy_thread/Makefile    |  29 ++++
> >  .../coresight/memcpy_thread/memcpy_thread.c   |  79 ++++++++++
> >  .../shell/coresight/thread_loop/.gitignore    |   1 +
> >  .../shell/coresight/thread_loop/Makefile      |  29 ++++
> >  .../shell/coresight/thread_loop/thread_loop.c |  86 +++++++++++
> >  .../coresight/unroll_loop_thread/.gitignore   |   1 +
> >  .../coresight/unroll_loop_thread/Makefile     |  29 ++++
> >  .../unroll_loop_thread/unroll_loop_thread.c   |  74 +++++++++
> >  .../tests/shell/coresight_asm_pure_loop.sh    |  18 +++
> >  .../shell/coresight_memcpy_thread_16k_10.sh   |  18 +++
> >  .../coresight_thread_loop_check_tid_10.sh     |  19 +++
> >  .../coresight_thread_loop_check_tid_2.sh      |  19 +++
> >  .../shell/coresight_unroll_loop_thread_10.sh  |  18 +++
> >  tools/perf/tests/shell/lib/coresight.sh       | 130 ++++++++++++++++
> >  24 files changed, 823 insertions(+), 4 deletions(-)
>
> As Leo pointed out this is a big patch and hard to digest intellectually.
>
> >  create mode 100644 tools/perf/Documentation/arm-coresight.txt
> >  create mode 100644 tools/perf/tests/shell/coresight/Makefile
> >  create mode 100644 tools/perf/tests/shell/coresight/Makefile.miniconfig
> >  create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore
> >  create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/Makefile
> >  create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S
> >  create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/.gitignore
> >  create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/Makefile
> >  create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c
> >  create mode 100644 tools/perf/tests/shell/coresight/thread_loop/.gitignore
> >  create mode 100644 tools/perf/tests/shell/coresight/thread_loop/Makefile
> >  create mode 100644 tools/perf/tests/shell/coresight/thread_loop/thread_loop.c
> >  create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore
> >  create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile
> >  create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c
> >  create mode 100755 tools/perf/tests/shell/coresight_asm_pure_loop.sh
> >  create mode 100755 tools/perf/tests/shell/coresight_memcpy_thread_16k_10.sh
> >  create mode 100755 tools/perf/tests/shell/coresight_thread_loop_check_tid_10.sh
> >  create mode 100755 tools/perf/tests/shell/coresight_thread_loop_check_tid_2.sh
> >  create mode 100755 tools/perf/tests/shell/coresight_unroll_loop_thread_10.sh
> >  create mode 100644 tools/perf/tests/shell/lib/coresight.sh
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 673c7124ca82..18cc20609f2e 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -1918,10 +1918,14 @@ F:    drivers/hwtracing/coresight/*
> >  F:   include/dt-bindings/arm/coresight-cti-dt.h
> >  F:   include/linux/coresight*
> >  F:   samples/coresight/*
> > +F:   tools/perf/Documentation/arm-coresight.txt
> >  F:   tools/perf/arch/arm/util/auxtrace.c
> >  F:   tools/perf/arch/arm/util/cs-etm.c
> >  F:   tools/perf/arch/arm/util/cs-etm.h
> >  F:   tools/perf/arch/arm/util/pmu.c
> > +F:   tools/perf/tests/shell/coresight_*
> > +F:   tools/perf/tests/shell/tools/Makefile
> > +F:   tools/perf/tests/shell/tools/coresight/*
> >  F:   tools/perf/util/cs-etm-decoder/*
> >  F:   tools/perf/util/cs-etm.*
> >
> > diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
> > index 20b8ab984d5f..138c679ecacd 100644
> > --- a/tools/perf/.gitignore
> > +++ b/tools/perf/.gitignore
> > @@ -15,8 +15,9 @@ perf*.1
> >  perf*.xml
> >  perf*.html
> >  common-cmds.h
> > -perf.data
> > -perf.data.old
> > +perf*.data
> > +perf*.data.old
> > +stats-*.csv
> >  output.svg
> >  perf-archive
> >  perf-with-kcore
> > @@ -30,6 +31,7 @@ config.mak.autogen
> >  *-flex.*
> >  *.pyc
> >  *.pyo
> > +*.stdout
> >  .config-detected
> >  util/intel-pt-decoder/inat-tables.c
> >  arch/*/include/generated/
> > diff --git a/tools/perf/Documentation/arm-coresight.txt b/tools/perf/Documentation/arm-coresight.txt
> > new file mode 100644
> > index 000000000000..3a9e6c573c58
> > --- /dev/null
> > +++ b/tools/perf/Documentation/arm-coresight.txt
>
> I think it would be best to keep all the coresight documentation under the
> current coresight documentation repository[1].  That way all the information on
> coresight can be found in a central place.
>
> Some part of what is added by this patch is redundant with what is currently
> available in [1].  Other parts are tests specific and should be added under
> something like "coresight-perf-test.rst".
>
> Thanks,
> Mathieu
>
> [1]. Documentation/trace/coresight/
>

I forgot... Please add a proper cover letter for this patchset.

>
> > @@ -0,0 +1,140 @@
> > +Arm Coresight Support
> > +=====================
> > +
> > +Coresight is a feature of some Arm based processors that allows for
> > +debugging. One of the things it can do is trace every instruction
> > +executed and remotely expose that information in a hardware compressed
> > +stream. Perf is able to locally access that stream and store it to the
> > +output perf data files. This stream can then be later decoded to give the
> > +instructions that were traced for debugging or profiling purposes. You
> > +can log such data with a perf record command like:
> > +
> > +    perf record -e cs_etm//u testbinary
> > +
> > +This would run some test binary (testbinary) until it exits and record
> > +a perf.data trace file. That file would have AUX sections if coresight
> > +is working correctly. You can dump the content of this file as
> > +readable text with a command like:
> > +
> > +    perf report --stdio --dump -i perf.data
> > +
> > +You should find some sections of this file have AUX data blocks like:
> > +
> > +    0x1e78 [0x30]: PERF_RECORD_AUXTRACE size: 0x11dd0  offset: 0  ref: 0x1b614fc1061b0ad1  idx: 0  tid: 531230  cpu: -1
> > +
> > +    . ... CoreSight ETM Trace data: size 73168 bytes
> > +            Idx:0; ID:10;   I_ASYNC : Alignment Synchronisation.
> > +              Idx:12; ID:10;  I_TRACE_INFO : Trace Info.; INFO=0x0 { CC.0 }
> > +              Idx:17; ID:10;  I_ADDR_L_64IS0 : Address, Long, 64 bit, IS0.; Addr=0x0000000000000000;
> > +              Idx:26; ID:10;  I_TRACE_ON : Trace On.
> > +              Idx:27; ID:10;  I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000FFFFB6069140; Ctxt: AArch64,EL0, NS;
> > +              Idx:38; ID:10;  I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEEEEEEEEEEEEEE
> > +              Idx:39; ID:10;  I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEEEEEEEEEEEEEE
> > +              Idx:40; ID:10;  I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEEEEEEEEEEEEEE
> > +              Idx:41; ID:10;  I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEN
> > +              ...
> > +
> > +If you see these above, then your system is tracing coresight data
> > +correctly.
> > +
> > +To compile perf with coresight support in the perf directory do
> > +
> > +    make CORESIGHT=1
> > +
> > +This will compile the perf tool with coresight support as well as
> > +build some small test binaries for perf test. This requires you also
> > +be compiling for 64bit Arm (ARM64/aarch64). The tools run as part of
> > +perf coresight tracing are in tests/shell/tools/coresight.
> > +
> > +You will also want coresight support enabled in your kernel config.
> > +Ensure it is enabled with:
> > +
> > +    CONFIG_CORESIGHT=y
> > +
> > +There are various other coresight options you probably also want
> > +enabled like:
> > +
> > +    CONFIG_CORESIGHT_LINKS_AND_SINKS=y
> > +    CONFIG_CORESIGHT_LINK_AND_SINK_TMC=y
> > +    CONFIG_CORESIGHT_CATU=y
> > +    CONFIG_CORESIGHT_SINK_TPIU=y
> > +    CONFIG_CORESIGHT_SINK_ETBV10=y
> > +    CONFIG_CORESIGHT_SOURCE_ETM4X=y
> > +    CONFIG_CORESIGHT_STM=y
> > +    CONFIG_CORESIGHT_CPU_DEBUG=y
> > +    CONFIG_CORESIGHT_CTI=y
> > +    CONFIG_CORESIGHT_CTI_INTEGRATION_REGS=y
> > +
> > +Please refer to the kernel configuration help for more information.
> > +
> > +Perf test - Verify kernel and userspace perf coresight work
> > +===========================================================
> > +
> > +When you run perf test, it will do a lot of self tests. Some of those
> > +tests will cover Coresight (only if enabled and on ARM64). You
> > +generally would run perf test from the tools/perf directory in the
> > +kernel tree. Some tests will check some internal perf support like:
> > +
> > +    Check Arm CoreSight trace data recording and synthesized samples
> > +
> > +Some others will actually use perf record and some test binaries that
> > +are in tests/shell/tools/coresight and will collect traces to ensure a
> > +minimum level of functionality is met. The scripts that launch these
> > +tests are in tests/shell. These will all look like:
> > +
> > +    Coresight / Memcpy 1M 25 Threads
> > +    Coresight / Unroll Loop Thread 2
> > +    ...
> > +
> > +These perf record tests will not run if the tool binaries do not exist
> > +in tests/shell/tools/coresight/*/ and will be skipped. If you do not
> > +have coresight support in hardware then either do not build perf with
> > +coresight support or remove these binaries in order to not have these
> > +tests fail and have them skip instead.
> > +
> > +These tests will log historical results in the current working
> > +directory (e.g. tools/perf) and will be named stats-*.csv like:
> > +
> > +    stats-asm_pure_loop-out.csv
> > +    stats-bubble_sort-random.csv
> > +    ...
> > +
> > +These statistic files log some aspects of the AUX data sections in
> > +the perf data output counting some numbers of certain encodings (a
> > +good way to know that it's working in a very simple way). One problem
> > +with coresight is that given a large enough amount of data needing to
> > +be logged, some of it can be lost due to the processor not waking up
> > +in time to read out all the data from buffers etc.. You will notice
> > +that the amount of data collected can vary a lot per run of perf test.
> > +If you wish to see how this changes over time, simply run perf test
> > +multiple times and all these csv files will have more and more data
> > +appended to it that you can later examine, graph and otherwise use to
> > +figure out if things have become worse or better.
> > +
> > +Be aware that amny of these tests take quite a while to run, specifically
> > +in processing the perf data file and dumping contents to then examine what
> > +is inside.
> > +
> > +You can change where these csv logs are stored by setting the
> > +PERF_TEST_CORESIGHT_STATDIR environment variable before running perf
> > +test like:
> > +
> > +    export PERF_TEST_CORESIGHT_STATDIR=/var/tmp
> > +    perf test
> > +
> > +They will also store resulting perf output data in the current
> > +directory for later inspection like:
> > +
> > +    perf-memcpy-1m.data
> > +    perf-thread_loop-2th.data
> > +    ...
> > +
> > +You can alter where the perf data files are stored by setting the
> > +PERF_TEST_CORESIGHT_DATADIR environment variable such as:
> > +
> > +    PERF_TEST_CORESIGHT_DATADIR=/var/tmp
> > +    perf test
> > +
> > +You may wish to set these above environment variables if you which to
> > +keep the output of tests outside of the current working directory for
> > +longer term storage and examination.
> > diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> > index ac861e42c8f7..b97db83992e0 100644
> > --- a/tools/perf/Makefile.perf
> > +++ b/tools/perf/Makefile.perf
> > @@ -630,7 +630,15 @@ sync_file_range_tbls := $(srctree)/tools/perf/trace/beauty/sync_file_range.sh
> >  $(sync_file_range_arrays): $(linux_uapi_dir)/fs.h $(sync_file_range_tbls)
> >       $(Q)$(SHELL) '$(sync_file_range_tbls)' $(linux_uapi_dir) > $@
> >
> > -all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS)
> > +TESTS_CORESIGHT_DIR := $(srctree)/tools/perf/tests/shell/coresight
> > +
> > +tests-coresight-targets: FORCE
> > +     $(Q)$(MAKE) -C $(TESTS_CORESIGHT_DIR)
> > +
> > +tests-coresight-targets-clean:
> > +     $(Q)$(MAKE) -C $(TESTS_CORESIGHT_DIR) clean
> > +
> > +all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS) tests-coresight-targets
> >
> >  # Create python binding output directory if not already present
> >  _dummy := $(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python')
> > @@ -1020,6 +1028,7 @@ install-tests: all install-gtk
> >               $(INSTALL) tests/shell/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell'; \
> >               $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/lib'; \
> >               $(INSTALL) tests/shell/lib/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/lib'
> > +     $(Q)$(MAKE) -C tests/shell/coresight install-tests
> >
> >  install-bin: install-tools install-tests install-traceevent-plugins
> >
> > @@ -1088,7 +1097,7 @@ endif # BUILD_BPF_SKEL
> >  bpf-skel-clean:
> >       $(call QUIET_CLEAN, bpf-skel) $(RM) -r $(SKEL_TMP_OUT) $(SKELETONS)
> >
> > -clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean fixdep-clean python-clean bpf-skel-clean
> > +clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean fixdep-clean python-clean bpf-skel-clean tests-coresight-targets-clean
> >       $(call QUIET_CLEAN, core-objs)  $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(OUTPUT)perf-iostat $(LANG_BINDINGS)
> >       $(Q)find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
> >       $(Q)$(RM) $(OUTPUT).config-detected
> > @@ -1155,5 +1164,6 @@ FORCE:
> >  .PHONY: shell_compatibility_test please_set_SHELL_PATH_to_a_more_modern_shell
> >  .PHONY: $(GIT-HEAD-PHONY) TAGS tags cscope FORCE prepare
> >  .PHONY: libtraceevent_plugins archheaders
> > +.PHONY: $(TESTS_CORESIGHT_TARGETS)
> >
> >  endif # force_fixdep
> > diff --git a/tools/perf/tests/shell/coresight/Makefile b/tools/perf/tests/shell/coresight/Makefile
> > new file mode 100644
> > index 000000000000..dda99aeac158
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/Makefile
> > @@ -0,0 +1,30 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +include ../../../../../tools/scripts/Makefile.include
> > +include ../../../../../tools/scripts/Makefile.arch
> > +include ../../../../../tools/scripts/utilities.mak
> > +
> > +SUBDIRS = \
> > +     asm_pure_loop \
> > +     thread_loop \
> > +     memcpy_thread \
> > +     unroll_loop_thread
> > +
> > +all: $(SUBDIRS)
> > +$(SUBDIRS):
> > +     $(Q)$(MAKE) -C $@
> > +
> > +INSTALLDIRS = $(SUBDIRS:%=install-%)
> > +
> > +install-tests: $(INSTALLDIRS)
> > +$(INSTALLDIRS):
> > +     $(Q)$(MAKE) -C $(@:install-%=%) install-tests
> > +
> > +CLEANDIRS = $(SUBDIRS:%=clean-%)
> > +
> > +clean: $(CLEANDIRS)
> > +$(CLEANDIRS):
> > +     $(Q)$(MAKE) -C $(@:clean-%=%) clean >/dev/null
> > +
> > +.PHONY: all clean $(SUBDIRS) $(CLEANDIRS) $(INSTALLDIRS)
> > +
> > diff --git a/tools/perf/tests/shell/coresight/Makefile.miniconfig b/tools/perf/tests/shell/coresight/Makefile.miniconfig
> > new file mode 100644
> > index 000000000000..893c12685fed
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/Makefile.miniconfig
> > @@ -0,0 +1,23 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +ifndef DESTDIR
> > +prefix ?= $(HOME)
> > +endif
> > +
> > +DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
> > +perfexecdir = libexec/perf-core
> > +perfexec_instdir = $(perfexecdir)
> > +
> > +ifneq ($(filter /%,$(firstword $(perfexecdir))),)
> > +perfexec_instdir = $(perfexecdir)
> > +else
> > +perfexec_instdir = $(prefix)/$(perfexecdir)
> > +endif
> > +
> > +perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir))
> > +INSTALL = install
> > +
> > +include ../../../../../scripts/Makefile.include
> > +include ../../../../../scripts/Makefile.arch
> > +include ../../../../../scripts/utilities.mak
> > diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore b/tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore
> > new file mode 100644
> > index 000000000000..468673ac32e8
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore
> > @@ -0,0 +1 @@
> > +asm_pure_loop
> > diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop/Makefile b/tools/perf/tests/shell/coresight/asm_pure_loop/Makefile
> > new file mode 100644
> > index 000000000000..10c5a60cb71c
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/asm_pure_loop/Makefile
> > @@ -0,0 +1,30 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +include ../Makefile.miniconfig
> > +
> > +BIN=asm_pure_loop
> > +LIB=
> > +
> > +all: $(BIN)
> > +
> > +$(BIN): $(BIN).S
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(Q)$(CC) $(BIN).S -nostdlib -static -o $(BIN) $(LIB)
> > +endif
> > +endif
> > +
> > +install-tests: all
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(call QUIET_INSTALL, tests) \
> > +             $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)'; \
> > +             $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)/$(BIN)'
> > +endif
> > +endif
> > +
> > +clean:
> > +     $(Q)$(RM) -f $(BIN)
> > +
> > +.PHONY: all clean install-tests
> > diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S b/tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S
> > new file mode 100644
> > index 000000000000..75cf084a927d
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S
> > @@ -0,0 +1,28 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/* Tamas Zsoldos <tamas.zsoldos@arm.com>, 2021 */
> > +
> > +.globl _start
> > +_start:
> > +     mov     x0, 0x0000ffff
> > +     mov     x1, xzr
> > +loop:
> > +     nop
> > +     nop
> > +     cbnz    x1, noskip
> > +     nop
> > +     nop
> > +     adrp    x2, skip
> > +     add     x2, x2, :lo12:skip
> > +     br      x2
> > +     nop
> > +     nop
> > +noskip:
> > +     nop
> > +     nop
> > +skip:
> > +     sub     x0, x0, 1
> > +     cbnz    x0, loop
> > +
> > +     mov     x0, #0
> > +     mov     x8, #93 // __NR_exit syscall
> > +     svc     #0
> > diff --git a/tools/perf/tests/shell/coresight/memcpy_thread/.gitignore b/tools/perf/tests/shell/coresight/memcpy_thread/.gitignore
> > new file mode 100644
> > index 000000000000..f8217e56091e
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/memcpy_thread/.gitignore
> > @@ -0,0 +1 @@
> > +memcpy_thread
> > diff --git a/tools/perf/tests/shell/coresight/memcpy_thread/Makefile b/tools/perf/tests/shell/coresight/memcpy_thread/Makefile
> > new file mode 100644
> > index 000000000000..e2604cfae74b
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/memcpy_thread/Makefile
> > @@ -0,0 +1,29 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +include ../Makefile.miniconfig
> > +
> > +BIN=memcpy_thread
> > +LIB=-pthread
> > +
> > +all: $(BIN)
> > +
> > +$(BIN): $(BIN).c
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(Q)$(CC) $(BIN).c -o $(BIN) $(LIB)
> > +endif
> > +endif
> > +
> > +install-tests: all
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(call QUIET_INSTALL, tests) \
> > +             $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)'; \
> > +             $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)/$(BIN)'
> > +endif
> > +endif
> > +
> > +clean:
> > +     $(Q)$(RM) -f $(BIN)
> > +
> > +.PHONY: all clean install-tests
> > diff --git a/tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c b/tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c
> > new file mode 100644
> > index 000000000000..a7e169d1bf64
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c
> > @@ -0,0 +1,79 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <pthread.h>
> > +
> > +struct args {
> > +     unsigned long loops;
> > +     unsigned long size;
> > +     pthread_t th;
> > +     void *ret;
> > +};
> > +
> > +static void *thrfn(void *arg)
> > +{
> > +     struct args *a = arg;
> > +     unsigned long i, len = a->loops;
> > +     unsigned char *src, *dst;
> > +
> > +     src = malloc(a->size * 1024);
> > +     dst = malloc(a->size * 1024);
> > +     if ((!src) || (!dst)) {
> > +             printf("ERR: Can't allocate memory\n");
> > +             exit(1);
> > +     }
> > +     for (i = 0; i < len; i++)
> > +             memcpy(dst, src, a->size * 1024);
> > +}
> > +
> > +static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
> > +{
> > +     pthread_t t;
> > +     pthread_attr_t attr;
> > +
> > +     pthread_attr_init(&attr);
> > +     pthread_create(&t, &attr, fn, arg);
> > +     return t;
> > +}
> > +
> > +int main(int argc, char **argv)
> > +{
> > +     unsigned long i, len, size, thr;
> > +     pthread_t threads[256];
> > +     struct args args[256];
> > +     long long v;
> > +
> > +     if (argc < 4) {
> > +             printf("ERR: %s [copysize Kb] [numthreads] [numloops (hundreds)]\n", argv[0]);
> > +             exit(1);
> > +     }
> > +
> > +     v = atoll(argv[1]);
> > +     if ((v < 1) || (v > (1024 * 1024))) {
> > +             printf("ERR: max memory 1GB (1048576 KB)\n");
> > +             exit(1);
> > +     }
> > +     size = v;
> > +     thr = atol(argv[2]);
> > +     if ((thr < 1) || (thr > 256)) {
> > +             printf("ERR: threads 1-256\n");
> > +             exit(1);
> > +     }
> > +     v = atoll(argv[3]);
> > +     if ((v < 1) || (v > 40000000000ll)) {
> > +             printf("ERR: loops 1-40000000000 (hundreds)\n");
> > +             exit(1);
> > +     }
> > +     len = v * 100;
> > +     for (i = 0; i < thr; i++) {
> > +             args[i].loops = len;
> > +             args[i].size = size;
> > +             args[i].th = new_thr(thrfn, &(args[i]));
> > +     }
> > +     for (i = 0; i < thr; i++)
> > +             pthread_join(args[i].th, &(args[i].ret));
> > +     return 0;
> > +}
> > diff --git a/tools/perf/tests/shell/coresight/thread_loop/.gitignore b/tools/perf/tests/shell/coresight/thread_loop/.gitignore
> > new file mode 100644
> > index 000000000000..6d4c33eaa9e8
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/thread_loop/.gitignore
> > @@ -0,0 +1 @@
> > +thread_loop
> > diff --git a/tools/perf/tests/shell/coresight/thread_loop/Makefile b/tools/perf/tests/shell/coresight/thread_loop/Makefile
> > new file mode 100644
> > index 000000000000..424df4e8b0e6
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/thread_loop/Makefile
> > @@ -0,0 +1,29 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +include ../Makefile.miniconfig
> > +
> > +BIN=thread_loop
> > +LIB=-pthread
> > +
> > +all: $(BIN)
> > +
> > +$(BIN): $(BIN).c
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(Q)$(CC) $(BIN).c -o $(BIN) $(LIB)
> > +endif
> > +endif
> > +
> > +install-tests: all
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(call QUIET_INSTALL, tests) \
> > +             $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)'; \
> > +             $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)/$(BIN)'
> > +endif
> > +endif
> > +
> > +clean:
> > +     $(Q)$(RM) -f $(BIN)
> > +
> > +.PHONY: all clean install-tests
> > diff --git a/tools/perf/tests/shell/coresight/thread_loop/thread_loop.c b/tools/perf/tests/shell/coresight/thread_loop/thread_loop.c
> > new file mode 100644
> > index 000000000000..c0158fac7d0b
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/thread_loop/thread_loop.c
> > @@ -0,0 +1,86 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +// define this for gettid()
> > +#define _GNU_SOURCE
> > +
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <pthread.h>
> > +#include <sys/syscall.h>
> > +#ifndef SYS_gettid
> > +// gettid is 178 on arm64
> > +# define SYS_gettid 178
> > +#endif
> > +#define gettid() syscall(SYS_gettid)
> > +
> > +struct args {
> > +     unsigned int loops;
> > +     pthread_t th;
> > +     void *ret;
> > +};
> > +
> > +static void *thrfn(void *arg)
> > +{
> > +     struct args *a = arg;
> > +     int i = 0, len = a->loops;
> > +
> > +     if (getenv("SHOW_TID")) {
> > +             unsigned long long tid = gettid();
> > +
> > +             printf("%llu\n", tid);
> > +     }
> > +     asm volatile(
> > +             "loop:\n"
> > +             "add %[i], %[i], #1\n"
> > +             "cmp %[i], %[len]\n"
> > +             "blt loop\n"
> > +             : /* out */
> > +             : /* in */ [i] "r" (i), [len] "r" (len)
> > +             : /* clobber */
> > +     );
> > +     return (void *)(long)i;
> > +}
> > +
> > +static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
> > +{
> > +     pthread_t t;
> > +     pthread_attr_t attr;
> > +
> > +     pthread_attr_init(&attr);
> > +     pthread_create(&t, &attr, fn, arg);
> > +     return t;
> > +}
> > +
> > +int main(int argc, char **argv)
> > +{
> > +     unsigned int i, len, thr;
> > +     pthread_t threads[256];
> > +     struct args args[256];
> > +
> > +     if (argc < 3) {
> > +             printf("ERR: %s [numthreads] [numloops (millions)]\n", argv[0]);
> > +             exit(1);
> > +     }
> > +
> > +     thr = atoi(argv[1]);
> > +     if ((thr < 1) || (thr > 256)) {
> > +             printf("ERR: threads 1-256\n");
> > +             exit(1);
> > +     }
> > +     len = atoi(argv[2]);
> > +     if ((len < 1) || (len > 4000)) {
> > +             printf("ERR: max loops 4000 (millions)\n");
> > +             exit(1);
> > +     }
> > +     len *= 1000000;
> > +     for (i = 0; i < thr; i++) {
> > +             args[i].loops = len;
> > +             args[i].th = new_thr(thrfn, &(args[i]));
> > +     }
> > +     for (i = 0; i < thr; i++)
> > +             pthread_join(args[i].th, &(args[i].ret));
> > +     return 0;
> > +}
> > diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore b/tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore
> > new file mode 100644
> > index 000000000000..2cb4e996dbf3
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore
> > @@ -0,0 +1 @@
> > +unroll_loop_thread
> > diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile b/tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile
> > new file mode 100644
> > index 000000000000..45ab2be8be92
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile
> > @@ -0,0 +1,29 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +include ../Makefile.miniconfig
> > +
> > +BIN=unroll_loop_thread
> > +LIB=-pthread
> > +
> > +all: $(BIN)
> > +
> > +$(BIN): $(BIN).c
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(Q)$(CC) $(BIN).c -o $(BIN) $(LIB)
> > +endif
> > +endif
> > +
> > +install-tests: all
> > +ifdef CORESIGHT
> > +ifeq ($(ARCH),arm64)
> > +     $(call QUIET_INSTALL, tests) \
> > +             $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)'; \
> > +             $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/tools/$(BIN)/$(BIN)'
> > +endif
> > +endif
> > +
> > +clean:
> > +     $(Q)$(RM) -f $(BIN)
> > +
> > +.PHONY: all clean install-tests
> > diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c b/tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c
> > new file mode 100644
> > index 000000000000..cb9d22c7dfb9
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c
> > @@ -0,0 +1,74 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <pthread.h>
> > +
> > +struct args {
> > +     pthread_t th;
> > +     unsigned int in, out;
> > +     void *ret;
> > +};
> > +
> > +static void *thrfn(void *arg)
> > +{
> > +     struct args *a = arg;
> > +     unsigned int i, in = a->in;
> > +
> > +     for (i = 0; i < 10000; i++) {
> > +             asm volatile (
> > +// force an unroll of thia add instruction so we can test long runs of code
> > +#define SNIP1 "add %[in], %[in], #1\n"
> > +// 10
> > +#define SNIP2 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1
> > +// 100
> > +#define SNIP3 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2
> > +// 1000
> > +#define SNIP4 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3
> > +// 10000
> > +#define SNIP5 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4
> > +// 100000
> > +                     SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5
> > +                     : /* out */
> > +                     : /* in */ [in] "r" (in)
> > +                     : /* clobber */
> > +             );
> > +     }
> > +}
> > +
> > +static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
> > +{
> > +     pthread_t t;
> > +     pthread_attr_t attr;
> > +
> > +     pthread_attr_init(&attr);
> > +     pthread_create(&t, &attr, fn, arg);
> > +     return t;
> > +}
> > +
> > +int main(int argc, char **argv)
> > +{
> > +     unsigned int i, thr;
> > +     pthread_t threads[256];
> > +     struct args args[256];
> > +
> > +     if (argc < 2) {
> > +             printf("ERR: %s [numthreads]\n", argv[0]);
> > +             exit(1);
> > +     }
> > +
> > +     thr = atoi(argv[1]);
> > +     if ((thr > 256) || (thr < 1)) {
> > +             printf("ERR: threads 1-256\n");
> > +             exit(1);
> > +     }
> > +     for (i = 0; i < thr; i++) {
> > +             args[i].in = rand();
> > +             args[i].th = new_thr(thrfn, &(args[i]));
> > +     }
> > +     for (i = 0; i < thr; i++)
> > +             pthread_join(args[i].th, &(args[i].ret));
> > +     return 0;
> > +}
> > diff --git a/tools/perf/tests/shell/coresight_asm_pure_loop.sh b/tools/perf/tests/shell/coresight_asm_pure_loop.sh
> > new file mode 100755
> > index 000000000000..3f0dbefcad50
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight_asm_pure_loop.sh
> > @@ -0,0 +1,18 @@
> > +#!/bin/sh -e
> > +# Coresight / ASM Pure Loop
> > +
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +TEST="asm_pure_loop"
> > +. $(dirname $0)/lib/coresight.sh
> > +ARGS=""
> > +DATV="out"
> > +DATA="$DATD/perf-$TEST-$DATV.data"
> > +
> > +perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS
> > +
> > +perf_dump_aux_verify "$DATA" 10 10 10
> > +
> > +err=$?
> > +exit $err
> > diff --git a/tools/perf/tests/shell/coresight_memcpy_thread_16k_10.sh b/tools/perf/tests/shell/coresight_memcpy_thread_16k_10.sh
> > new file mode 100755
> > index 000000000000..8972af835016
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight_memcpy_thread_16k_10.sh
> > @@ -0,0 +1,18 @@
> > +#!/bin/sh -e
> > +# Coresight / Memcpy 16k 10 Threads
> > +
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +TEST="memcpy_thread"
> > +. $(dirname $0)/lib/coresight.sh
> > +ARGS="16 10 1"
> > +DATV="16k_10"
> > +DATA="$DATD/perf-$TEST-$DATV.data"
> > +
> > +perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS
> > +
> > +perf_dump_aux_verify "$DATA" 10 10 10
> > +
> > +err=$?
> > +exit $err
> > diff --git a/tools/perf/tests/shell/coresight_thread_loop_check_tid_10.sh b/tools/perf/tests/shell/coresight_thread_loop_check_tid_10.sh
> > new file mode 100755
> > index 000000000000..5b468901f89b
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight_thread_loop_check_tid_10.sh
> > @@ -0,0 +1,19 @@
> > +#!/bin/sh -e
> > +# Coresight / Thread Loop 10 Threads - Check TID
> > +
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +TEST="thread_loop"
> > +. $(dirname $0)/lib/coresight.sh
> > +ARGS="10 1"
> > +DATV="check-tid-10th"
> > +DATA="$DATD/perf-$TEST-$DATV.data"
> > +STDO="$DATD/perf-$TEST-$DATV.stdout"
> > +
> > +SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
> > +
> > +perf_dump_aux_tid_verify "$DATA" "$STDO"
> > +
> > +err=$?
> > +exit $err
> > diff --git a/tools/perf/tests/shell/coresight_thread_loop_check_tid_2.sh b/tools/perf/tests/shell/coresight_thread_loop_check_tid_2.sh
> > new file mode 100755
> > index 000000000000..f8b7abd3aa03
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight_thread_loop_check_tid_2.sh
> > @@ -0,0 +1,19 @@
> > +#!/bin/sh -e
> > +# Coresight / Thread Loop 2 Threads - Check TID
> > +
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +TEST="thread_loop"
> > +. $(dirname $0)/lib/coresight.sh
> > +ARGS="2 20"
> > +DATV="check-tid-2th"
> > +DATA="$DATD/perf-$TEST-$DATV.data"
> > +STDO="$DATD/perf-$TEST-$DATV.stdout"
> > +
> > +SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
> > +
> > +perf_dump_aux_tid_verify "$DATA" "$STDO"
> > +
> > +err=$?
> > +exit $err
> > diff --git a/tools/perf/tests/shell/coresight_unroll_loop_thread_10.sh b/tools/perf/tests/shell/coresight_unroll_loop_thread_10.sh
> > new file mode 100755
> > index 000000000000..c985dfb025c2
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/coresight_unroll_loop_thread_10.sh
> > @@ -0,0 +1,18 @@
> > +#!/bin/sh -e
> > +# Coresight / Unroll Loop Thread 10
> > +
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +TEST="unroll_loop_thread"
> > +. $(dirname $0)/lib/coresight.sh
> > +ARGS="10"
> > +DATV="10"
> > +DATA="$DATD/perf-$TEST-$DATV.data"
> > +
> > +perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS
> > +
> > +perf_dump_aux_verify "$DATA" 10 10 10
> > +
> > +err=$?
> > +exit $err
> > diff --git a/tools/perf/tests/shell/lib/coresight.sh b/tools/perf/tests/shell/lib/coresight.sh
> > new file mode 100644
> > index 000000000000..6a611b073f02
> > --- /dev/null
> > +++ b/tools/perf/tests/shell/lib/coresight.sh
> > @@ -0,0 +1,130 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
> > +
> > +# This is sourced from a driver script so no need for #!/bin... etc. at the
> > +# top - the assumption below is that it runs as part of sourcing after the
> > +# test sets up some basic env vars to say what it is.
> > +
> > +# perf record options for the perf tests to use
> > +PERFRECMEM="-m ,128M"
> > +PERFRECOPT="$PERFRECMEM -e cs_etm//u"
> > +
> > +# These tests need to be run as root or coresight won't allow large buffers
> > +# and will not collect proper data
> > +UID=`id -u`
> > +if test "$UID" -ne 0; then
> > +     echo "Not running as root... skip"
> > +     exit 2
> > +fi
> > +
> > +TOOLS=$(dirname $0)
> > +DIR="$TOOLS/coresight/$TEST"
> > +BIN="$DIR/$TEST"
> > +# If the test tool/binary does not exist and is executable then skip the test
> > +if ! test -x "$BIN"; then exit 2; fi
> > +DATD="."
> > +# If the data dir env is set then make the data dir use that instead of ./
> > +if test -n "$PERF_TEST_CORESIGHT_DATADIR"; then
> > +     DATD="$PERF_TEST_CORESIGHT_DATADIR";
> > +fi
> > +# If the stat dir env is set then make the data dir use that instead of ./
> > +STATD="."
> > +if test -n "$PERF_TEST_CORESIGHT_STATDIR"; then
> > +     STATD="$PERF_TEST_CORESIGHT_STATDIR";
> > +fi
> > +
> > +# Called if the test fails - error code 2
> > +err() {
> > +     echo "$1"
> > +     exit 1
> > +}
> > +
> > +# Check that some statistics from our perf
> > +check_val_min() {
> > +     STATF="$4"
> > +     if test "$2" -lt "$3"; then
> > +             echo ", FAILED" >> "$STATF"
> > +             err "Sanity check number of $1 is too low ($2 < $3)"
> > +     fi
> > +}
> > +
> > +perf_dump_aux_verify() {
> > +     # Some basic checking that the AUX chunk contains some sensible data
> > +     # to see that we are recording something and at least a minimum
> > +     # amount of it. We should almost always see F3 atoms in just about
> > +     # anything but certainly we will see some trace info and async atom
> > +     # chunks.
> > +     DUMP="$DATD/perf-tmp-aux-dump.txt"
> > +     perf report --stdio --dump -i "$1" | \
> > +             grep -o -e I_ATOM_F3 -e I_ASYNC -e I_TRACE_INFO > "$DUMP"
> > +     # Simply count how many of these atoms we find to see that we are
> > +     # producing a reasonable amount of data - exact checks are not sane
> > +     # as this is a lossy  process where we may lose some blocks and the
> > +     # compiler may produce different code depending on the compiler and
> > +     # optimization options, so this is rough  just to see if we're
> > +     # either missing almost all the data or all of it
> > +     ATOM_F3_NUM=`grep I_ATOM_F3 "$DUMP" | wc -l`
> > +     ATOM_ASYNC_NUM=`grep I_ASYNC "$DUMP" | wc -l`
> > +     ATOM_TRACE_INFO_NUM=`grep I_TRACE_INFO "$DUMP" | wc -l`
> > +     rm -f "$DUMP"
> > +
> > +     # Arguments provide minimums for a pass
> > +     CHECK_F3_MIN="$2"
> > +     CHECK_ASYNC_MIN="$3"
> > +     CHECK_TRACE_INFO_MIN="$4"
> > +
> > +     # Write out statistics, so over time you can track results to see if
> > +     # there is a pattern - for example we have less "noisy" results that
> > +     # produce more consistent amounts of data each run, to see if over
> > +     # time any techinques to  minimize data loss are having an effect or
> > +     # not
> > +     STATF="$STATD/stats-$TEST-$DATV.csv"
> > +     if ! test -f "$STATF"; then
> > +             echo "ATOM F3 Count, Minimum, ATOM ASYNC Count, Minimum, TRACE INFO Count, Minimum" > "$STATF"
> > +     fi
> > +     echo -n "$ATOM_F3_NUM, $CHECK_F3_MIN, $ATOM_ASYNC_NUM, $CHECK_ASYNC_MIN, $ATOM_TRACE_INFO_NUM, $CHECK_TRACE_INFO_MIN" >> "$STATF"
> > +
> > +     # Actually check to see if we passed or failed.
> > +     check_val_min "ATOM_F3" "$ATOM_F3_NUM" "$CHECK_F3_MIN" "$STATF"
> > +     check_val_min "ASYNC" "$ATOM_ASYNC_NUM" "$CHECK_ASYNC_MIN" "$STATF"
> > +     check_val_min "TRACE_INFO" "$ATOM_TRACE_INFO_NUM" "$CHECK_TRACE_INFO_MIN" "$STATF"
> > +     echo ", Ok" >> "$STATF"
> > +}
> > +
> > +perf_dump_aux_tid_verify() {
> > +     # Specifically crafted test will produce a list of Tread ID's to
> > +     # stdout that need to be checked to  see that they have had trace
> > +     # info collected in AUX blocks in the perf data. This will go
> > +     # through all the TID's that are listed as CID=0xabcdef and see
> > +     # that all the Thread IDs the test tool reports are  in the perf
> > +     # data AUX chunks
> > +
> > +     # The TID test tools will print a TID per stdout line that are being
> > +     # tested
> > +     TIDS=`cat "$2"`
> > +     # Scan the perf report to find the TIDs that are actually CID in hex
> > +     # and build a list of the ones found
> > +     FOUND_TIDS=`perf report --stdio --dump -i "$1" | \
> > +                     grep -o "CID=0x[0-9a-z]\+" | sed 's/CID=//g' | \
> > +                     uniq | sort | uniq`
> > +
> > +     # Iterate over the list of TIDs that the test says it has and find
> > +     # them in the TIDs found in the perf report
> > +     MISSING=""
> > +     for TID2 in $TIDS; do
> > +             FOUND=""
> > +             for TIDHEX in $FOUND_TIDS; do
> > +                     TID=`printf "%i" $TIDHEX`
> > +                     if test "$TID" -eq "$TID2"; then
> > +                             FOUND="y"
> > +                             break
> > +                     fi
> > +             done
> > +             if test -z "$FOUND"; then
> > +                     MISSING="$MISSING $TID"
> > +             fi
> > +     done
> > +     if test -n "$MISSING"; then
> > +             err "Thread IDs $MISSING not found in perf AUX data"
> > +     fi
> > +}
> > --
> > 2.32.0
> >