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    Subject[PATCH 05/12] perf test: Add coresight test to check all threads get some data logged
    Date
    From: Carsten Haitzler <carsten.haitzler@arm.com>

    This adds a test and test scripts to check that all threads in the
    target binary end up logging some kind of coresight aux data and that
    they are not missing.

    Signed-off-by: Carsten Haitzler <carsten.haitzler@arm.com>
    ---
    .../coresight_thread_loop_check_tid_10.sh | 19 ++++
    .../coresight_thread_loop_check_tid_2.sh | 19 ++++
    .../coresight_thread_loop_check_tid_250.sh | 19 ++++
    .../perf/tests/shell/tools/coresight/Makefile | 3 +-
    .../tools/coresight/thread_loop/Makefile | 29 +++++++
    .../tools/coresight/thread_loop/thread_loop.c | 86 +++++++++++++++++++
    6 files changed, 174 insertions(+), 1 deletion(-)
    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_thread_loop_check_tid_250.sh
    create mode 100644 tools/perf/tests/shell/tools/coresight/thread_loop/Makefile
    create mode 100644 tools/perf/tests/shell/tools/coresight/thread_loop/thread_loop.c

    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..283ad9facdee
    --- /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 $0)/lib/coresight.sh
    +ARGS="10 2000"
    +DATV="check-tid-10th"
    +DATA="$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..ce8ba534bba2
    --- /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 $0)/lib/coresight.sh
    +ARGS="2 4000"
    +DATV="check-tid-2th"
    +DATA="$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_thread_loop_check_tid_250.sh b/tools/perf/tests/shell/coresight_thread_loop_check_tid_250.sh
    new file mode 100755
    index 000000000000..cb14581c1e68
    --- /dev/null
    +++ b/tools/perf/tests/shell/coresight_thread_loop_check_tid_250.sh
    @@ -0,0 +1,19 @@
    +#!/bin/sh -e
    +# Coresight / Thread Loop 250 Threads - Check TID
    +
    +# SPDX-License-Identifier: GPL-2.0
    +# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
    +
    +TEST="thread_loop"
    +. $(dirname $0)/lib/coresight.sh
    +ARGS="250 100"
    +DATV="check-tid-250th"
    +DATA="$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/tools/coresight/Makefile b/tools/perf/tests/shell/tools/coresight/Makefile
    index 723006ea827c..1edab729db76 100644
    --- a/tools/perf/tests/shell/tools/coresight/Makefile
    +++ b/tools/perf/tests/shell/tools/coresight/Makefile
    @@ -5,7 +5,8 @@ include ../../../../../../tools/scripts/Makefile.arch
    include ../../../../../../tools/scripts/utilities.mak

    SUBDIRS = \
    - asm_pure_loop
    + asm_pure_loop \
    + thread_loop

    all: $(SUBDIRS)
    $(SUBDIRS):
    diff --git a/tools/perf/tests/shell/tools/coresight/thread_loop/Makefile b/tools/perf/tests/shell/tools/coresight/thread_loop/Makefile
    new file mode 100644
    index 000000000000..424df4e8b0e6
    --- /dev/null
    +++ b/tools/perf/tests/shell/tools/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/tools/coresight/thread_loop/thread_loop.c b/tools/perf/tests/shell/tools/coresight/thread_loop/thread_loop.c
    new file mode 100644
    index 000000000000..c0158fac7d0b
    --- /dev/null
    +++ b/tools/perf/tests/shell/tools/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;
    +}
    --
    2.32.0
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