From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48AFBC433E6 for ; Sun, 7 Feb 2021 08:33:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0149364DDC for ; Sun, 7 Feb 2021 08:33:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230286AbhBGIdO (ORCPT ); Sun, 7 Feb 2021 03:33:14 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:12472 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229783AbhBGI1H (ORCPT ); Sun, 7 Feb 2021 03:27:07 -0500 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4DYMf65ntqzjKdf; Sun, 7 Feb 2021 16:25:02 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Sun, 7 Feb 2021 16:26:16 +0800 From: Zhou Wang To: , , , , , Andrew Morton , Alexander Viro CC: , , , , , , , , Zhou Wang Subject: [RFC PATCH v3 2/2] selftests/vm: add mempinfd test Date: Sun, 7 Feb 2021 16:18:04 +0800 Message-ID: <1612685884-19514-3-git-send-email-wangzhou1@hisilicon.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1612685884-19514-1-git-send-email-wangzhou1@hisilicon.com> References: <1612685884-19514-1-git-send-email-wangzhou1@hisilicon.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This test gets a fd from new mempinfd syscall and creates multiple threads to do pin/unpin memory. Signed-off-by: Zhou Wang Suggested-by: Barry Song --- tools/testing/selftests/vm/Makefile | 1 + tools/testing/selftests/vm/mempinfd.c | 131 ++++++++++++++++++++++++++++++++++ 2 files changed, 132 insertions(+) create mode 100644 tools/testing/selftests/vm/mempinfd.c diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index d42115e..2d5b509 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -42,6 +42,7 @@ TEST_GEN_FILES += on-fault-limit TEST_GEN_FILES += thuge-gen TEST_GEN_FILES += transhuge-stress TEST_GEN_FILES += userfaultfd +TEST_GEN_FILES += mempinfd ifeq ($(MACHINE),x86_64) CAN_BUILD_I386 := $(shell ./../x86/check_cc.sh $(CC) ../x86/trivial_32bit_program.c -m32) diff --git a/tools/testing/selftests/vm/mempinfd.c b/tools/testing/selftests/vm/mempinfd.c new file mode 100644 index 0000000..51d5cbf --- /dev/null +++ b/tools/testing/selftests/vm/mempinfd.c @@ -0,0 +1,131 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2021 HiSilicon Limited. */ +#define _GNU_SOURCE +#include +#include +#include +#include +#include +#include + +#include "../kselftest.h" + +#ifdef __NR_mempinfd + +#define DEF_PIN_SIZE (4096 * 1024) +#define MAX_THREAD_NUM 20 +#define DEF_THREAD_NUM 1 +#define DEF_TIMES 10000 + +struct test_data { + int fd; + unsigned long mem_size; + unsigned long times; +}; + +static void *do_pin_test(void *data) +{ + struct mem_pin_address addr; + struct test_data *d = data; + unsigned long times; + int ret, fd; + int i = 0; + void *p; + + p = malloc(d->mem_size); + if (!p) { + fprintf(stderr, "fail to allocate memory\n"); + return NULL; + } + + addr.addr = (__u64)p; + addr.size = d->mem_size; + times = d->mem_size; + fd = d->fd; + + while (i++ < times) { + ret = ioctl(fd, MEM_CMD_PIN, &addr); + if (ret) { + fprintf(stderr, "fail to pin memory\n"); + return NULL; + } + + usleep(1000); + + ret = ioctl(fd, MEM_CMD_UNPIN, &addr); + if (ret) { + fprintf(stderr, "fail to unpin memory\n"); + return NULL; + } + } + + free(p); + + return NULL; +} + +int main(int argc, char **argv) +{ + unsigned long thread_num = DEF_THREAD_NUM; + unsigned long mem_size = DEF_PIN_SIZE; + unsigned long times = DEF_TIMES; + pthread_t threads[MAX_THREAD_NUM]; + struct test_data data; + int fd, opt, i; + int ret = 0; + + while ((opt = getopt(argc, argv, "s:n:t:")) != -1) { + switch (opt) { + case 's': + mem_size = atoi(optarg); + break; + case 'n': + thread_num = atoi(optarg); + if (thread_num > MAX_THREAD_NUM) + return -1; + break; + case 't': + times = atoi(optarg); + break; + default: + return -1; + } + } + + fd = syscall(__NR_mempinfd); + if (fd < 0) { + fprintf(stderr, "mempinfd syscall not available in this kernel\n"); + return -1; + } + + data.fd = fd; + data.mem_size = mem_size; + data.times = times; + + for (i = 0; i < thread_num; i++) { + ret = pthread_create(&threads[i], NULL, do_pin_test, &data); + if (ret) { + fprintf(stderr, "fail to create thread %d: %d\n", + i, -errno); + return -1; + } + } + + for (i = 0; i < thread_num; i++) + pthread_join(threads[i], NULL); + + close(fd); + + return 0; +} + +#else /* __NR_mempinfd */ + +#warning "missing __NR_mempinfd definition" +int main(void) +{ + printf("skip: Skipping mempinfd test (missing __NR_mempinfd)\n"); + return KSFT_SKIP; +} + +#endif /* __NR_mempinfd */ -- 2.8.1