Sure, use it for anything.

ср, 13 мая 2020 г. в 20:32, Alex Bennée <alex.bennee@linaro.org>:

> Based on the original testcase by Nikolay Igotti.
>
> Message-ID: <CAEme+7GLKg_dNsHizzTKDymX9HyD+Ph2iZ=
> WKhOw2XG+zhViXg@mail.gmail.com>
> Cc: Nikolay Igotti <igotti@gmail.com>
> [Nikolay can we have your signed of by to add the testcase?]
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> ---
>  tests/tcg/multiarch/threadcount.c   | 62 +++++++++++++++++++++++++++++
>  tests/tcg/multiarch/Makefile.target |  2 +
>  2 files changed, 64 insertions(+)
>  create mode 100644 tests/tcg/multiarch/threadcount.c
>
> diff --git a/tests/tcg/multiarch/threadcount.c
> b/tests/tcg/multiarch/threadcount.c
> new file mode 100644
> index 00000000000..546dd90eeb2
> --- /dev/null
> +++ b/tests/tcg/multiarch/threadcount.c
> @@ -0,0 +1,62 @@
> +/*
> + * Thread Exerciser
> + *
> + * Unlike testthread which is mainly concerned about testing thread
> + * semantics this test is used to exercise the thread creation and
> + * accounting. A version of this test found a problem with clashing
> + * cpu_indexes which caused a break in plugin handling.
> + *
> + * Based on the original test case by Nikolay Igotti.
> + *
> + * Copyright (c) 2020 Linaro Ltd
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + */
> +
> +#include <stdint.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <unistd.h>
> +#include <pthread.h>
> +
> +int max_threads = 10;
> +
> +typedef struct {
> +    int delay;
> +} ThreadArg;
> +
> +static void *thread_fn(void* varg)  {
> +    ThreadArg* arg = varg;
> +    usleep(arg->delay);
> +    free(arg);
> +    return NULL;
> +}
> +
> +int main(int argc, char **argv) {
> +    int i;
> +    pthread_t *threads;
> +
> +    if (argc > 1) {
> +        max_threads = atoi(argv[1]);
> +    }
> +    threads = calloc(sizeof(pthread_t), max_threads);
> +
> +    for (i = 0; i < max_threads; i++) {
> +        ThreadArg* arg = calloc(sizeof(ThreadArg), 1);
> +        arg->delay = i * 100;
> +        pthread_create(threads + i, NULL, thread_fn, arg);
> +    }
> +
> +    printf("Created %d threads\n", max_threads);
> +
> +    /* sleep until roughly half the threads have "finished" */
> +    usleep(max_threads * 50);
> +
> +    for (i = 0; i < max_threads; i++) {
> +        pthread_join(threads[i], NULL);
> +    }
> +
> +    printf("Done\n");
> +
> +    return 0;
> +}
> diff --git a/tests/tcg/multiarch/Makefile.target
> b/tests/tcg/multiarch/Makefile.target
> index 51fb75ecfdd..cb49cc9ccb2 100644
> --- a/tests/tcg/multiarch/Makefile.target
> +++ b/tests/tcg/multiarch/Makefile.target
> @@ -28,6 +28,8 @@ run-float_%: float_%
>
>  testthread: LDFLAGS+=-lpthread
>
> +threadcount: LDFLAGS+=-lpthread
> +
>  # We define the runner for test-mmap after the individual
>  # architectures have defined their supported pages sizes. If no
>  # additional page sizes are defined we only run the default test.
> --
> 2.20.1
>
>