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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 F1091C3F2D9 for ; Fri, 6 Mar 2020 01:16:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C82DE20726 for ; Fri, 6 Mar 2020 01:16:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=joelfernandes.org header.i=@joelfernandes.org header.b="NG1T3fBT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726846AbgCFBQh (ORCPT ); Thu, 5 Mar 2020 20:16:37 -0500 Received: from mail-qv1-f65.google.com ([209.85.219.65]:41899 "EHLO mail-qv1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726162AbgCFBQh (ORCPT ); Thu, 5 Mar 2020 20:16:37 -0500 Received: by mail-qv1-f65.google.com with SMTP id s15so231393qvn.8 for ; Thu, 05 Mar 2020 17:16:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=w/Vqkumn/RHHCHsg28o5TElun0WCp3EnRDLyxx7bNCY=; b=NG1T3fBTXkAXVDjCWQdULYeSHkaWIO+lNW6+qNFMIb0eh3q05SunsJOTOTzaMoCmd/ zVA4gLfxEBLo2TdLQitZbT9fcbCOceM167cFWG8DEi3qZ7q9Ny6f1A6/Z8nW8PnPTNxo hHV6gR6kvmC3goH5y5vM7m/K1vWRjrZuR62m0= 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:mime-version :content-transfer-encoding; bh=w/Vqkumn/RHHCHsg28o5TElun0WCp3EnRDLyxx7bNCY=; b=h/ndnmS7jR62Tbcod/PN5owsL97BMPgIa/rLXbT7K2jyurZqHQva6p6b6SvvlTTi4J U2UH/Y8V/gA/VhOEkuMDrWNP7NonFH15tA0Ls75EhyMDEVxpSMcbJBfl5lhASGsPQmLs yQV/gRcRADNi8lUb3WYYTPKW+9LpEiiVX6jgQq+3gB+8eqWOBHmPChrnCg6EJGFHBwL5 IxbFI8x72IL4wJdJvx/14XEREu3wXLiWXK41fX4SXkpqIv2TtK0XpXSp/is9ak15vbL5 WXWN1uNLvRxRvaNovz9oWdTSgLesIw/ie9kMt55kSBc587brTBUm4PLQORJPyW+f7EhD X8pg== X-Gm-Message-State: ANhLgQ0tlk/2dCV7QV7REwYH0iTYdhRBD00DPD4DKDcFVPaT0Upu1rZR JyZWLxB1XNstRTOO8/yfcDN/Uw== X-Google-Smtp-Source: ADFU+vu3eXzAwRUQJNXWudiplRiGCsZ1MUGVqnptRhU2xlgymmp2luL5Kh0xMVbNIJQBgcRmdBWyKA== X-Received: by 2002:a0c:f381:: with SMTP id i1mr948212qvk.163.1583457394590; Thu, 05 Mar 2020 17:16:34 -0800 (PST) Received: from joelaf.cam.corp.google.com ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id 65sm16934009qtf.95.2020.03.05.17.16.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Mar 2020 17:16:34 -0800 (PST) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Cc: "Joel Fernandes (Google)" , Davidlohr Bueso , Josh Triplett , Lai Jiangshan , Mathieu Desnoyers , "Paul E. McKenney" , rcu@vger.kernel.org, Steven Rostedt , urezki@gmail.com Subject: [PATCH rcu-dev 1/2] rcuperf: Add ability to increase object allocation size Date: Thu, 5 Mar 2020 20:16:25 -0500 Message-Id: <20200306011626.97616-1-joel@joelfernandes.org> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org This allows us to increase memory pressure dynamically using a new rcuperf boot command line parameter called 'rcumult'. Signed-off-by: Joel Fernandes (Google) --- kernel/rcu/rcuperf.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index a4a8d097d84d9..16dd1e6b7c09f 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -88,6 +88,7 @@ torture_param(bool, shutdown, RCUPERF_SHUTDOWN, torture_param(int, verbose, 1, "Enable verbose debugging printk()s"); torture_param(int, writer_holdoff, 0, "Holdoff (us) between GPs, zero to disable"); torture_param(int, kfree_rcu_test, 0, "Do we run a kfree_rcu() perf test?"); +torture_param(int, kfree_mult, 1, "Multiple of kfree_obj size to allocate."); static char *perf_type = "rcu"; module_param(perf_type, charp, 0444); @@ -635,7 +636,7 @@ kfree_perf_thread(void *arg) } for (i = 0; i < kfree_alloc_num; i++) { - alloc_ptr = kmalloc(sizeof(struct kfree_obj), GFP_KERNEL); + alloc_ptr = kmalloc(kfree_mult * sizeof(struct kfree_obj), GFP_KERNEL); if (!alloc_ptr) return -ENOMEM; @@ -722,6 +723,8 @@ kfree_perf_init(void) schedule_timeout_uninterruptible(1); } + pr_alert("kfree object size=%lu\n", kfree_mult * sizeof(struct kfree_obj)); + kfree_reader_tasks = kcalloc(kfree_nrealthreads, sizeof(kfree_reader_tasks[0]), GFP_KERNEL); if (kfree_reader_tasks == NULL) { -- 2.25.0.265.gbab2e86ba0-goog