From patchwork Mon Dec 7 11:31:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: yulei zhang X-Patchwork-Id: 11955527 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 C0481C2BBCD for ; Mon, 7 Dec 2020 11:36:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B777233ED for ; Mon, 7 Dec 2020 11:36:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727570AbgLGLgS (ORCPT ); Mon, 7 Dec 2020 06:36:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727648AbgLGLgQ (ORCPT ); Mon, 7 Dec 2020 06:36:16 -0500 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFF4BC061A56; Mon, 7 Dec 2020 03:35:35 -0800 (PST) Received: by mail-pg1-x544.google.com with SMTP id w16so8642093pga.9; Mon, 07 Dec 2020 03:35:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2oI/oh3gTLcVKVrjU4mtMVnwaLDwsHWGDZd/m897JZk=; b=lhjKgDf+8F/uFxn5RBaOSzYX0LvT73tAN0Gg+Z8ChDCSn1g21h9K7z03ULsA5x3FO/ 2a+Eg0te0MGsaduIR3o9k0QLaF/mI8tGtephTk2VDC0HtpswcYPbfNlwIcireWiJ3lEi YBLTiakDlLO8KbJjbiP2fFHdnJI2rSybJZ1rp2A8mhn/yuJGj2RdiE8Y7GUN+76U1u3F grW+T/JmrPwOi4a+Ia/MdYqiJ3odiRzcVjQEiwxt6frfkjpO1sZ3bLJV1WGZr7av8hnV KBYDpv1nu/d9yh0K3QIlXoA278BPZLPtVPY9jfVMUeGQEixWS3nOF9qEgg52Qo3REX5+ jePQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2oI/oh3gTLcVKVrjU4mtMVnwaLDwsHWGDZd/m897JZk=; b=S3+HlXwLU+dh2EF7RJsZ9ZeYh6bv24koic/3vXshwYR17eNG0dEBVynz1K44JX0B4n fjs4v1oDWkLmUOpVRuOKdSi7/pe7Xs45Vx14LDG7bZhpGzHD9nyM+AXIIwMNgV1OVcR8 E/ntPQd7U2RnoeFdiUX9uc9I+7QsU4WOUv5QPF0G0K5/Ra9Y5pLQv33hJbtR+InlvYXo 6Oi7ho2jqb0YQdCdW0cV2cXPTeDO+BAoBnba0nR5yEgR73y1aQB3WmB77hS4SMezG1Q+ GLIK92Yn0yHsiggln6HkQ4Mn4soaHbDOXHvlhdmx+ddOHg+4xZOfxoYtMinvuwXimfh1 3rwg== X-Gm-Message-State: AOAM530jJdeGiTWNBjsYs7FBXZeCDzz44n6lzLw79W4601ZujfrXpLO6 or3hy7XoT8TSnztNQOAy4iM= X-Google-Smtp-Source: ABdhPJxk408hICw1VHxdPSSZFmVYiF7oejg12uAdXoM+nWbeUsNih67nBm2DaYDp/HkVlqXXpfd2hQ== X-Received: by 2002:a17:902:fe17:b029:da:799a:8bfd with SMTP id g23-20020a170902fe17b02900da799a8bfdmr15667660plj.10.1607340935397; Mon, 07 Dec 2020 03:35:35 -0800 (PST) Received: from localhost.localdomain ([203.205.141.39]) by smtp.gmail.com with ESMTPSA id d4sm14219822pfo.127.2020.12.07.03.35.32 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Dec 2020 03:35:34 -0800 (PST) From: yulei.kernel@gmail.com X-Google-Original-From: yuleixzhang@tencent.com To: linux-mm@kvack.org, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, naoya.horiguchi@nec.com, viro@zeniv.linux.org.uk, pbonzini@redhat.com Cc: joao.m.martins@oracle.com, rdunlap@infradead.org, sean.j.christopherson@intel.com, xiaoguangrong.eric@gmail.com, kernellwp@gmail.com, lihaiwei.kernel@gmail.com, Yulei Zhang , Xiao Guangrong Subject: [RFC V2 34/37] dmem: add dmem unit tests Date: Mon, 7 Dec 2020 19:31:27 +0800 Message-Id: X-Mailer: git-send-email 2.28.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Yulei Zhang This test case is used to test dmem management system. Signed-off-by: Xiao Guangrong Signed-off-by: Yulei Zhang --- tools/testing/dmem/Kbuild | 1 + tools/testing/dmem/Makefile | 10 +++ tools/testing/dmem/dmem-test.c | 184 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 195 insertions(+) create mode 100644 tools/testing/dmem/Kbuild create mode 100644 tools/testing/dmem/Makefile create mode 100644 tools/testing/dmem/dmem-test.c diff --git a/tools/testing/dmem/Kbuild b/tools/testing/dmem/Kbuild new file mode 100644 index 00000000..04988f7 --- /dev/null +++ b/tools/testing/dmem/Kbuild @@ -0,0 +1 @@ +obj-m += dmem-test.o diff --git a/tools/testing/dmem/Makefile b/tools/testing/dmem/Makefile new file mode 100644 index 00000000..21f141f --- /dev/null +++ b/tools/testing/dmem/Makefile @@ -0,0 +1,10 @@ +KDIR ?= ../../../ + +default: + $(MAKE) -C $(KDIR) M=$$PWD + +install: default + $(MAKE) -C $(KDIR) M=$$PWD modules_install + +clean: + rm -f *.o *.ko Module.* modules.* *.mod.c diff --git a/tools/testing/dmem/dmem-test.c b/tools/testing/dmem/dmem-test.c new file mode 100644 index 00000000..4baae18 --- /dev/null +++ b/tools/testing/dmem/dmem-test.c @@ -0,0 +1,184 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include +#include +#include +#include +#include +#include +#include +#include + +struct dmem_mem_node { + struct list_head node; +}; + +static LIST_HEAD(dmem_list); + +static int dmem_test_alloc_init(unsigned long dpage_shift) +{ + int ret; + + ret = dmem_alloc_init(dpage_shift); + if (ret) + pr_info("dmem_alloc_init failed, dpage_shift %ld ret=%d\n", + dpage_shift, ret); + return ret; +} + +static int __dmem_test_alloc(int order, int nid, nodemask_t *nodemask, + const char *caller) +{ + struct dmem_mem_node *pos; + phys_addr_t addr; + int i, ret = 0; + + for (i = 0; i < (1 << order); i++) { + addr = dmem_alloc_pages_nodemask(nid, nodemask, 1, NULL); + if (!addr) { + ret = -ENOMEM; + break; + } + + pos = __va(addr); + list_add(&pos->node, &dmem_list); + } + + pr_info("%s: alloc order %d on node %d has fallback node %s... %s.\n", + caller, order, nid, nodemask ? "yes" : "no", + !ret ? "okay" : "failed"); + + return ret; +} + +static void dmem_test_free_all(void) +{ + struct dmem_mem_node *pos, *n; + + list_for_each_entry_safe(pos, n, &dmem_list, node) { + list_del(&pos->node); + dmem_free_page(__pa(pos)); + } +} + +#define dmem_test_alloc(order, nid, nodemask) \ + __dmem_test_alloc(order, nid, nodemask, __func__) + +/* dmem shoud have 2^6 native pages available at lest */ +static int order_test(void) +{ + int order, i, ret; + int page_orders[] = {0, 1, 2, 3, 4, 5, 6}; + + ret = dmem_test_alloc_init(PAGE_SHIFT); + if (ret) + return ret; + + for (i = 0; i < ARRAY_SIZE(page_orders); i++) { + order = page_orders[i]; + + ret = dmem_test_alloc(order, numa_node_id(), NULL); + if (ret) + break; + } + + dmem_test_free_all(); + + dmem_alloc_uinit(); + + return ret; +} + +static int node_test(void) +{ + nodemask_t nodemask; + unsigned long nr = 0; + int order; + int node; + int ret = 0; + + order = 0; + + ret = dmem_test_alloc_init(PUD_SHIFT); + if (ret) + return ret; + + pr_info("%s: test allocation on node 0\n", __func__); + node = 0; + nodes_clear(nodemask); + node_set(0, nodemask); + + ret = dmem_test_alloc(order, node, &nodemask); + if (ret) + goto exit; + + dmem_test_free_all(); + + pr_info("%s: begin to exhaust dmem on node 0.\n", __func__); + node = 1; + nodes_clear(nodemask); + node_set(0, nodemask); + + INIT_LIST_HEAD(&dmem_list); + while (!(ret = dmem_test_alloc(order, node, &nodemask))) + nr++; + + pr_info("Allocation on node 0 success times: %lu\n", nr); + + pr_info("%s: allocation on node 0 again\n", __func__); + node = 0; + nodes_clear(nodemask); + node_set(0, nodemask); + ret = dmem_test_alloc(order, node, &nodemask); + if (!ret) { + pr_info("\tNot expected fallback\n"); + ret = -1; + } else { + ret = 0; + pr_info("\tOK, Dmem on node 0 exhausted, fallback success\n"); + } + + pr_info("%s: Release dmem\n", __func__); + dmem_test_free_all(); + +exit: + dmem_alloc_uinit(); + return ret; +} + +static __init int dmem_test_init(void) +{ + int ret; + + pr_info("dmem: test init...\n"); + + ret = order_test(); + if (ret) + return ret; + + ret = node_test(); + + + if (ret) + pr_info("dmem test fail, ret=%d\n", ret); + else + pr_info("dmem test success\n"); + return ret; +} + +static __exit void dmem_test_exit(void) +{ + pr_info("dmem: test exit...\n"); +} + +module_init(dmem_test_init); +module_exit(dmem_test_exit); +MODULE_LICENSE("GPL v2");