From patchwork Wed Dec 18 09:02:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Wang X-Patchwork-Id: 1212108 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it (client-ip=213.254.12.146; helo=picard.linux.it; envelope-from=ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="M1X4mc0i"; dkim-atps=neutral Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47d8Ck1NKLz9sRs for ; Wed, 18 Dec 2019 20:02:26 +1100 (AEDT) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 6F6483C22BB for ; Wed, 18 Dec 2019 10:02:23 +0100 (CET) X-Original-To: ltp@lists.linux.it Delivered-To: ltp@picard.linux.it Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [IPv6:2001:4b78:1:20::6]) by picard.linux.it (Postfix) with ESMTP id 83E093C2278 for ; Wed, 18 Dec 2019 10:02:11 +0100 (CET) Received: from us-smtp-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) by in-6.smtp.seeweb.it (Postfix) with ESMTP id 113F1140201B for ; Wed, 18 Dec 2019 10:02:10 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576659729; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=17KvxUSY0LvHhAdqym6agVJs5q+4Ak16lNqE/3Bby50=; b=M1X4mc0iLdZWnK4uKn8fz8z8zQQvucrBJbAOXd9o887Bor2fn065ZyPugf+hIGgwFqHmbL HmdwYmnyPIBD+2uxlCESBFTyUAaBq5/d34TjNk6CoNbvQoGvpTCnbl1Zk67DiARvKVStco 5yhaWIrh8/jyyCRMR2LejcYc+JHvizk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-414-iKO5ckplOdS2xQ3cdNfoNw-1; Wed, 18 Dec 2019 04:02:07 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AC57FDBA3 for ; Wed, 18 Dec 2019 09:02:06 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.66.81.246]) by smtp.corp.redhat.com (Postfix) with ESMTP id E106F5D9E2 for ; Wed, 18 Dec 2019 09:02:05 +0000 (UTC) From: Li Wang To: ltp@lists.linux.it Date: Wed, 18 Dec 2019 17:02:01 +0800 Message-Id: <20191218090202.26932-1-liwang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-MC-Unique: iKO5ckplOdS2xQ3cdNfoNw-1 X-Mimecast-Spam-Score: 0 X-Virus-Scanned: clamav-milter 0.99.2 at in-6.smtp.seeweb.it X-Virus-Status: Clean X-Spam-Status: No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, SPF_HELO_NONE, SPF_PASS autolearn=disabled version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on in-6.smtp.seeweb.it Subject: [LTP] [PATCH v3 1/2] lib: add .request_hugepages to reserve hugepage X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it Sender: "ltp" Many of the ltp tests need to use hugepage in their testing, this allows the test can reserve hpages from system only via .request_hugepages = xx. If set non-zero number of request_hugepages, test will try to reserve the expected number of hugepage for testing in setup phase. If system does not have enough hpage for using, it will try the best to reserve 80% available number of hpages. For a system without hugetlb supporting, variable 'tst_hugepage' will be set to 0. Signed-off-by: Li Wang --- Notes: v2 --> v3 * rename .needs_hugepages to .request_hugepages * rename tst_no_hugepage to tst_hugepages * makes tst_request_hugepages() return tst_hugepages * call tst_sys_conf_save in tst_hugepage.c doc/test-writing-guidelines.txt | 38 ++++++++++++++++++++++ include/tst_hugepage.h | 29 +++++++++++++++++ include/tst_test.h | 13 ++++++++ lib/newlib_tests/.gitignore | 1 + lib/newlib_tests/test20.c | 45 ++++++++++++++++++++++++++ lib/tst_hugepage.c | 57 +++++++++++++++++++++++++++++++++ lib/tst_test.c | 6 ++-- 7 files changed, 187 insertions(+), 2 deletions(-) create mode 100644 include/tst_hugepage.h create mode 100644 lib/newlib_tests/test20.c create mode 100644 lib/tst_hugepage.c diff --git a/doc/test-writing-guidelines.txt b/doc/test-writing-guidelines.txt index 546bb7a49..7875690b9 100644 --- a/doc/test-writing-guidelines.txt +++ b/doc/test-writing-guidelines.txt @@ -1933,6 +1933,44 @@ specified by the user plus some other heuristics. For full documentation see the comments in 'include/tst_fuzzy_sync.h'. +2.2.34 Reserving hugepages +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Many of the ltp tests need to use hugepage in their testing, this allows the +test can reserve hugepages from system only via .request_hugepages = xx. + +If set non-zero number of request_hugepages, test will try to reserve the +expected number of hugepage for testing in setup phase. If system does not +have enough hpage for using, it will try the best to reserve 80% available +number of hpages. With success test stores the reserved hugepage number in +'tst_hugepages. For the system without hugetlb supporting, variable +'tst_hugepages' will be set to 0. + +Also, we do cleanup and restore work for the hpages resetting automatically. + +[source,c] +------------------------------------------------------------------------------- +#include "tst_test.h" + +static void run(void) +{ + ... + + if (tst_hugepages == test.request_hugepages) + TEST(do_hpage_test); + else + ... + ... +} + +struct tst_test test = { + ... + .test_all = run, + .request_hugepages = 2, + ... +}; +------------------------------------------------------------------------------- + 2.3 Writing a testcase in shell ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/include/tst_hugepage.h b/include/tst_hugepage.h new file mode 100644 index 000000000..10e0eaf47 --- /dev/null +++ b/include/tst_hugepage.h @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2019 Red Hat, Inc. + */ + +#ifndef TST_HUGEPAGE__ +#define TST_HUGEPAGE__ + +#define PATH_HUGEPAGES "/sys/kernel/mm/hugepages/" +#define PATH_NR_HPAGES "/proc/sys/vm/nr_hugepages" + +/* + * Try the best to request a specified number of huge pages from system, + * it will store the reserved hpage number in tst_hugepages. + * + * Note: this depend on the status of system memory fragmentation. + */ +int tst_request_hugepages(int hpages); + +/* + * This variable is used for recording the number of hugepages which system can + * provides. It will be equal to 'hpages' if tst_request_hugepages on success, + * otherwise set it to a number of hugepages that we were able to reserve. + * + * If system does not support hugetlb, then it will be set to 0. + */ +extern unsigned int tst_hugepages; + +#endif /* TST_HUGEPAGE_H */ diff --git a/include/tst_test.h b/include/tst_test.h index 21c7dfbdb..1026a422a 100644 --- a/include/tst_test.h +++ b/include/tst_test.h @@ -37,6 +37,7 @@ #include "tst_coredump.h" #include "tst_buffers.h" #include "tst_capability.h" +#include "tst_hugepage.h" /* * Reports testcase result. @@ -148,6 +149,18 @@ struct tst_test { */ int all_filesystems:1; + /* + * If set non-zero number of request_hugepages, test will try to reserve the + * expected number of hugepage for testing in setup phase. If system does not + * have enough hpage for using, it will try the best to reserve 80% available + * number of hpages. With success test stores the reserved hugepage number in + * 'tst_hugepages. For the system without hugetlb supporting, variable + * 'tst_hugepages' will be set to 0. + * + * Also, we do cleanup and restore work for the hpages resetting automatically. + */ + unsigned int request_hugepages; + /* * If set non-zero denotes number of test variant, the test is executed * variants times each time with tst_variant set to different number. diff --git a/lib/newlib_tests/.gitignore b/lib/newlib_tests/.gitignore index d4aa4935f..ab3a92c4c 100644 --- a/lib/newlib_tests/.gitignore +++ b/lib/newlib_tests/.gitignore @@ -23,6 +23,7 @@ tst_strstatus test17 test18 test19 +test20 tst_expiration_timer test_exec test_exec_child diff --git a/lib/newlib_tests/test20.c b/lib/newlib_tests/test20.c new file mode 100644 index 000000000..92e230976 --- /dev/null +++ b/lib/newlib_tests/test20.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2019 Li Wang + */ + +/* + * Tests .request_hugepages + .save_restore + */ + +#include "tst_test.h" +#include "tst_hugepage.h" +#include "tst_sys_conf.h" + +static const char * const save_restore[] = { + "!/proc/sys/kernel/numa_balancing", + NULL, +}; + +static void do_test(void) { + + int val, hpages; + + tst_res(TINFO, "tst_hugepages = %u", tst_hugepages); + SAFE_FILE_PRINTF("/proc/sys/kernel/numa_balancing", "1"); + + hpages = test.request_hugepages; + SAFE_FILE_SCANF(PATH_NR_HPAGES, "%d", &val); + if (val != hpages) + tst_brk(TBROK, "nr_hugepages = %d, but expect %d", val, hpages); + else + tst_res(TPASS, "test .needs_hugepges"); + + hpages = tst_request_hugepages(3); + SAFE_FILE_SCANF(PATH_NR_HPAGES, "%d", &val); + if (val != hpages) + tst_brk(TBROK, "nr_hugepages = %d, but expect %d", val, hpages); + else + tst_res(TPASS, "tst_request_hugepages"); +} + +static struct tst_test test = { + .test_all = do_test, + .request_hugepages = 2, + .save_restore = save_restore, +}; diff --git a/lib/tst_hugepage.c b/lib/tst_hugepage.c new file mode 100644 index 000000000..c4385b9c6 --- /dev/null +++ b/lib/tst_hugepage.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2019 Red Hat, Inc. + */ + +#define TST_NO_DEFAULT_MAIN + +#include "tst_test.h" +#include "tst_hugepage.h" + +unsigned int tst_hugepages; + +int tst_request_hugepages(int hpages) +{ + int val; + long mem_avail, max_hpages; + + if (access(PATH_HUGEPAGES, F_OK)) { + tst_res(TCONF, "Huge page is not supported."); + tst_hugepages = 0; + goto out; + } + + tst_hugepages = hpages; + + SAFE_FILE_PRINTF("/proc/sys/vm/drop_caches", "3"); + + if (FILE_LINES_SCANF("/proc/meminfo", + "MemAvailable: %ld", &mem_avail)) { + /* + * Using "MemFree:" on kernel that doesn't have + * "MemAvailable:" in Meminfo + */ + tst_res(TINFO, "MemAvailable: not found in /proc/meminfo"); + + mem_avail = SAFE_READ_MEMINFO("MemFree:"); + } + + max_hpages = mem_avail / SAFE_READ_MEMINFO("Hugepagesize:"); + + if (hpages > max_hpages) { + tst_res(TINFO, "Requested number(%d) of hugepages is too large, " + "limiting to 80%% of the max hugepage count %ld", + hpages, max_hpages); + tst_hugepages = max_hpages * 0.8; + } + + tst_sys_conf_save("?/proc/sys/vm/nr_hugepages"); + SAFE_FILE_PRINTF(PATH_NR_HPAGES, "%d", tst_hugepages); + SAFE_FILE_SCANF(PATH_NR_HPAGES, "%d", &val); + if (val != tst_hugepages) + tst_brk(TBROK, "nr_hugepages = %d, but expect %d", val, tst_hugepages); + + tst_res(TINFO, "%d hugepage(s) reserved", tst_hugepages); +out: + return tst_hugepages; +} diff --git a/lib/tst_test.c b/lib/tst_test.c index 8d7dee2cc..9a24cffc5 100644 --- a/lib/tst_test.c +++ b/lib/tst_test.c @@ -890,6 +890,9 @@ static void do_setup(int argc, char *argv[]) if (tst_test->all_filesystems) tst_test->needs_device = 1; + if (tst_test->request_hugepages) + tst_request_hugepages(tst_test->request_hugepages); + setup_ipc(); if (tst_test->bufs) @@ -1006,8 +1009,7 @@ static void do_cleanup(void) tst_rmdir(); } - if (tst_test->save_restore) - tst_sys_conf_restore(0); + tst_sys_conf_restore(0); if (tst_test->restore_wallclock) tst_wallclock_restore();