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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 B75A7C433F5 for ; Wed, 15 Sep 2021 23:42:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A05B4610E8 for ; Wed, 15 Sep 2021 23:42:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232740AbhIOXny (ORCPT ); Wed, 15 Sep 2021 19:43:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:45864 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232749AbhIOXny (ORCPT ); Wed, 15 Sep 2021 19:43:54 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 789A760F25; Wed, 15 Sep 2021 23:42:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631749354; bh=BnehqFZ+0aAwSqBxXSPaW5QEQl/5N/MbutLTfosz4UM=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=gTslHSymEfOY73oqc8ZqyzaRDE+Kw0ZZu22C1kgMwwxqMSs4yoMOvI5sZ5r6op5cx +RuRZL04+xhKmY2X992GUl/LGXy/tYfiWr7Yz3hMzgjzK1v594ojL5GooyCEM8GKLU aye1/MRie2Q9lZAj+olSA/DrOWiKbd+RcJZICZGSYrtagmOTBo+YdfW1qN4eWke1AP H6wltL1FWLh/u6ETl6I+pouZMyNig4htQocaLybM8iVCMCwbM3JooUYzQ59hYdF2vM hGcdIMpcwhgGrFZGGF8YIVtqM5nVQ9i8cyRoI1xY8oJKNV5WHZv0x7FWuIDP8oyg6g cgKvcW7GGgzaQ== Subject: [PATCH 1/1] generic: fsstress with cpu offlining From: "Darrick J. Wong" To: djwong@kernel.org, guaneryu@gmail.com Cc: linux-xfs@vger.kernel.org, fstests@vger.kernel.org, guan@eryu.me Date: Wed, 15 Sep 2021 16:42:34 -0700 Message-ID: <163174935421.380813.6102795123954022876.stgit@magnolia> In-Reply-To: <163174934876.380813.7279783755501552575.stgit@magnolia> References: <163174934876.380813.7279783755501552575.stgit@magnolia> User-Agent: StGit/0.19 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Darrick J. Wong Exercise filesystem operations when we're taking CPUs online and offline throughout the test. Signed-off-by: Darrick J. Wong --- tests/generic/726 | 74 +++++++++++++++++++++++++++++++++++++++++++++++++ tests/generic/726.out | 2 + 2 files changed, 76 insertions(+) create mode 100755 tests/generic/726 create mode 100644 tests/generic/726.out diff --git a/tests/generic/726 b/tests/generic/726 new file mode 100755 index 00000000..1a3f2fad --- /dev/null +++ b/tests/generic/726 @@ -0,0 +1,74 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2021 Oracle, Inc. All Rights Reserved. +# +# FS QA Test No. 726 +# +# Run an all-writes fsstress run with multiple threads while exercising CPU +# hotplugging to shake out bugs in the write path. +# +. ./common/preamble +_begin_fstest auto rw stress + +# Override the default cleanup function. +_cleanup() +{ + cd / + rm -f $tmp.* + $KILLALL_PROG -9 fsstress > /dev/null 2>&1 + wait # for exercise_cpu_hotplug subprocess + for i in "$sysfs_cpu_dir/"cpu*/online; do + echo 1 > "$i" 2>/dev/null + done + test -n "$stress_dir" && rm -r -f "$stress_dir" +} + +exercise_cpu_hotplug() +{ + while [ -e $sentinel_file ]; do + local idx=$(( RANDOM % nr_hotplug_cpus )) + local cpu="${hotplug_cpus[idx]}" + local action=$(( RANDOM % 2 )) + + echo "$action" > "$sysfs_cpu_dir/cpu$cpu/online" 2>/dev/null + sleep 0.5 + done +} + +_supported_fs generic +_require_test +_require_command "$KILLALL_PROG" "killall" + +sysfs_cpu_dir="/sys/devices/system/cpu" + +# Figure out which CPU(s) support hotplug. +nrcpus=$(getconf _NPROCESSORS_CONF) +hotplug_cpus=() +for ((i = 0; i < nrcpus; i++ )); do + test -e "$sysfs_cpu_dir/cpu$i/online" && hotplug_cpus+=("$i") +done +nr_hotplug_cpus="${#hotplug_cpus[@]}" +test "$nr_hotplug_cpus" -gt 0 || _notrun "CPU hotplugging not supported" + +stress_dir="$TEST_DIR/$seq" +rm -r -f "$stress_dir" +mkdir -p "$stress_dir" + +echo "Silence is golden." + +sentinel_file=$tmp.hotplug +touch $sentinel_file +exercise_cpu_hotplug & + +# Cap the number of fsstress threads at one per hotpluggable CPU if we exceed +# 1024 IO threads, per maintainer request. +nr_cpus=$((LOAD_FACTOR * nr_hotplug_cpus)) +test "$nr_cpus" -gt 1024 && nr_cpus="$nr_hotplug_cpus" + +nr_ops=$((25000 * TIME_FACTOR)) +$FSSTRESS_PROG $FSSTRESS_AVOID -w -d $stress_dir -n $nr_ops -p $nr_cpus >> $seqres.full +rm -f $sentinel_file + +# success, all done +status=0 +exit diff --git a/tests/generic/726.out b/tests/generic/726.out new file mode 100644 index 00000000..6839f8ce --- /dev/null +++ b/tests/generic/726.out @@ -0,0 +1,2 @@ +QA output created by 726 +Silence is golden.