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    Subject[PATCH 05/12] perf test: Add 'leafloop' test workload
    Date
    The leafloop workload is to run an infinite loop in the test_leaf
    function. This is needed for the ARM fp callgraph test to verify if it
    gets the correct callchains.

    $ perf test -w leafloop

    Signed-off-by: Namhyung Kim <namhyung@kernel.org>
    ---
    tools/perf/tests/builtin-test.c | 1 +
    tools/perf/tests/tests.h | 1 +
    tools/perf/tests/workloads/Build | 3 +++
    tools/perf/tests/workloads/leafloop.c | 34 +++++++++++++++++++++++++++
    4 files changed, 39 insertions(+)
    create mode 100644 tools/perf/tests/workloads/leafloop.c

    diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
    index 161f38476e77..0ed5ac452f6e 100644
    --- a/tools/perf/tests/builtin-test.c
    +++ b/tools/perf/tests/builtin-test.c
    @@ -121,6 +121,7 @@ static struct test_suite **tests[] = {
    static struct test_workload *workloads[] = {
    &workload__noploop,
    &workload__thloop,
    + &workload__leafloop,
    };

    static int num_subtests(const struct test_suite *t)
    diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
    index e6edfeeadaeb..86804dd6452b 100644
    --- a/tools/perf/tests/tests.h
    +++ b/tools/perf/tests/tests.h
    @@ -202,5 +202,6 @@ struct test_workload workload__##work = { \
    /* The list of test workloads */
    DECLARE_WORKLOAD(noploop);
    DECLARE_WORKLOAD(thloop);
    +DECLARE_WORKLOAD(leafloop);

    #endif /* TESTS_H */
    diff --git a/tools/perf/tests/workloads/Build b/tools/perf/tests/workloads/Build
    index b8964b1099c0..631596bdb2b3 100644
    --- a/tools/perf/tests/workloads/Build
    +++ b/tools/perf/tests/workloads/Build
    @@ -2,3 +2,6 @@

    perf-y += noploop.o
    perf-y += thloop.o
    +perf-y += leafloop.o
    +
    +CFLAGS_leafloop.o = -g -O0 -fno-inline -fno-omit-frame-pointer
    diff --git a/tools/perf/tests/workloads/leafloop.c b/tools/perf/tests/workloads/leafloop.c
    new file mode 100644
    index 000000000000..1bf5cc97649b
    --- /dev/null
    +++ b/tools/perf/tests/workloads/leafloop.c
    @@ -0,0 +1,34 @@
    +/* SPDX-License-Identifier: GPL-2.0 */
    +#include <stdlib.h>
    +#include <linux/compiler.h>
    +#include "../tests.h"
    +
    +/* We want to check these symbols in perf script */
    +noinline void leaf(volatile int b);
    +noinline void parent(volatile int b);
    +
    +static volatile int a;
    +
    +noinline void leaf(volatile int b)
    +{
    + for (;;)
    + a += b;
    +}
    +
    +noinline void parent(volatile int b)
    +{
    + leaf(b);
    +}
    +
    +static int leafloop(int argc, const char **argv)
    +{
    + int c = 1;
    +
    + if (argc > 0)
    + c = atoi(argv[0]);
    +
    + parent(c);
    + return 0;
    +}
    +
    +DEFINE_WORKLOAD(leafloop);
    --
    2.38.1.584.g0f3c55d4c2-goog
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