From patchwork Thu Jun 3 21:24:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Waiman Long X-Patchwork-Id: 12298099 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=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 4E02DC4709A for ; Thu, 3 Jun 2021 21:25:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3811261401 for ; Thu, 3 Jun 2021 21:25:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230286AbhFCV0w (ORCPT ); Thu, 3 Jun 2021 17:26:52 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:29781 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230288AbhFCV0v (ORCPT ); Thu, 3 Jun 2021 17:26:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622755506; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:in-reply-to:in-reply-to:references:references; bh=AQptwpPftuvlepn0c//rvhF5er61at0BxM0RAxJWfRY=; b=GUXXohO57oA9vFuy/PH+2LpUx90eZLZ1HgxS5DvW9Ami7Ga0rYcj/Fw8koMqmC/afSMwxf 9k8NuVRxGlS4RzWRWGm7cDbF2s5xgRM/8+NTS24jKgv76+yZCYjuDlqrJrGv2CkQ//PPhv qwfRJ5bAwKuE4jKQnny6ev2CpvoQg3M= 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-462-W1aTJVnqMymYaNmlUbEitQ-1; Thu, 03 Jun 2021 17:25:04 -0400 X-MC-Unique: W1aTJVnqMymYaNmlUbEitQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4EB9A80ED96; Thu, 3 Jun 2021 21:25:03 +0000 (UTC) Received: from llong.com (ovpn-116-222.rdu2.redhat.com [10.10.116.222]) by smtp.corp.redhat.com (Postfix) with ESMTP id DC5F2648A0; Thu, 3 Jun 2021 21:24:58 +0000 (UTC) From: Waiman Long To: Tejun Heo , Zefan Li , Johannes Weiner , Jonathan Corbet , Shuah Khan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Andrew Morton , Roman Gushchin , Phil Auld , Peter Zijlstra , Juri Lelli , Waiman Long Subject: [PATCH 5/5] kselftest/cgroup: Add cpuset v2 partition root state test Date: Thu, 3 Jun 2021 17:24:16 -0400 Message-Id: <20210603212416.25934-6-longman@redhat.com> In-Reply-To: <20210603212416.25934-1-longman@redhat.com> References: <20210603212416.25934-1-longman@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add a test script for exercising the cpuset v2 partition root state code. Signed-off-by: Waiman Long --- tools/testing/selftests/cgroup/Makefile | 2 +- .../selftests/cgroup/test_cpuset_prs.sh | 141 ++++++++++++++++++ 2 files changed, 142 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh diff --git a/tools/testing/selftests/cgroup/Makefile b/tools/testing/selftests/cgroup/Makefile index f027d933595b..e8ff3ffc3a43 100644 --- a/tools/testing/selftests/cgroup/Makefile +++ b/tools/testing/selftests/cgroup/Makefile @@ -4,7 +4,7 @@ CFLAGS += -Wall -pthread all: TEST_FILES := with_stress.sh -TEST_PROGS := test_stress.sh +TEST_PROGS := test_stress.sh test_cpuset_prs.sh TEST_GEN_PROGS = test_memcontrol TEST_GEN_PROGS += test_kmem TEST_GEN_PROGS += test_core diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh b/tools/testing/selftests/cgroup/test_cpuset_prs.sh new file mode 100755 index 000000000000..6a9c02c301b5 --- /dev/null +++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh @@ -0,0 +1,141 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test for cpuset v2 partition root state (PRS) +# +# The sched verbose flag is set, if available, so that the console log +# can be examined for the correct setting of scheduling domain. +# + +skip_test() { + echo "$1" + echo "Test SKIPPED" + exit 0 +} + +[[ $(id -u) -eq 0 ]] || skip_test "Test must be run as root!" + +# Set sched verbose flag, if available +[[ -d /sys/kernel/debug/sched ]] && echo Y > /sys/kernel/debug/sched/verbose + +# Find cgroup v2 mount point +CGROUP2=$(mount | grep "^cgroup2" | awk -e '{print $3}') +[[ -n "$CGROUP2" ]] || skip_test "Cgroup v2 mount point not found!" + +CPUS=$(lscpu | grep "^CPU(s)" | sed -e "s/.*:[[:space:]]*//") +[[ $CPUS -lt 4 ]] && skip_test "Test needs at least 4 cpus available!" + +cd $CGROUP2 +echo +cpuset > cgroup.subtree_control +[[ -d test ]] || mkdir test +cd test +echo 2-3 > cpuset.cpus +TYPE=$(cat cpuset.cpus.partition) +[[ $TYPE = member ]] || echo member > cpuset.cpus.partition + +console_msg() +{ + MSG=$1 + echo "$MSG" + echo "" > /dev/console + echo "$MSG" > /dev/console + sleep 1 +} + +test_partition() +{ + EXPECTED_VAL=$1 + echo $EXPECTED_VAL > cpuset.cpus.partition + [[ $? -eq 0 ]] || exit 1 + ACTUAL_VAL=$(cat cpuset.cpus.partition) + [[ $ACTUAL_VAL != $EXPECTED_VAL ]] && { + echo "cpuset.cpus.partition: expect $EXPECTED_VAL, found $EXPECTED_VAL" + echo "Test FAILED" + exit 1 + } +} + +test_effective_cpus() +{ + EXPECTED_VAL=$1 + ACTUAL_VAL=$(cat cpuset.cpus.effective) + [[ "$ACTUAL_VAL" != "$EXPECTED_VAL" ]] && { + echo "cpuset.cpus.effective: expect '$EXPECTED_VAL', found '$EXPECTED_VAL'" + echo "Test FAILED" + exit 1 + } +} + +# Adding current process to cgroup.procs as a test +test_add_proc() +{ + OUTSTR="$1" + ERRMSG=$((echo $$ > cgroup.procs) |& cat) + echo $ERRMSG | grep -q "$OUTSTR" + [[ $? -ne 0 ]] && { + echo "cgroup.procs: expect '$OUTSTR', got '$ERRMSG'" + echo "Test FAILED" + exit 1 + } + echo $$ > $CGROUP2/cgroup.procs # Move out the task +} + +# +# Testing the new "root-nolb" partition root type +# +console_msg "Change from member to root" +test_partition root + +console_msg "Change from root to root-nolb" +test_partition root-nolb + +console_msg "Change from root-nolb to member" +test_partition member + +console_msg "Change from member to root-nolb" +test_partition root-nolb + +console_msg "Change from root-nolb to root" +test_partition root + +console_msg "Change from root to member" +test_partition member + +# +# Testing partition root with no cpu +# +console_msg "Distribute all cpus to child partition" +echo +cpuset > cgroup.subtree_control +test_partition root + +mkdir t1 +cd t1 +echo 2-3 > cpuset.cpus +test_partition root +test_effective_cpus 2-3 +cd .. +test_effective_cpus "" + +console_msg "Moving task to partition test" +test_add_proc "No space left" +cd t1 +test_add_proc "" +cd .. + +console_msg "Shrink and expand child partition" +cd t1 +echo 2 > cpuset.cpus +cd .. +test_effective_cpus 3 +cd t1 +echo 2-3 > cpuset.cpus +cd .. +test_effective_cpus "" + +# Cleaning up +console_msg "Cleaning up" +echo $$ > $CGROUP2/cgroup.procs +[[ -d t1 ]] && rmdir t1 +cd .. +rmdir test +echo "Test PASSED"