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,URIBL_BLOCKED,USER_AGENT_GIT 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 2C4E7C3F2D2 for ; Thu, 5 Mar 2020 22:13:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F2B2520801 for ; Thu, 5 Mar 2020 22:13:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=joelfernandes.org header.i=@joelfernandes.org header.b="yUJonfYk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726243AbgCEWNi (ORCPT ); Thu, 5 Mar 2020 17:13:38 -0500 Received: from mail-qv1-f65.google.com ([209.85.219.65]:41231 "EHLO mail-qv1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726145AbgCEWNi (ORCPT ); Thu, 5 Mar 2020 17:13:38 -0500 Received: by mail-qv1-f65.google.com with SMTP id s15so51557qvn.8 for ; Thu, 05 Mar 2020 14:13:37 -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=+B1geMfKugZ9/Y0qjQLB48rxQUh2J0QAO4pKzK9MPtc=; b=yUJonfYkzQmASLfePqIhRviUDsAM+NazCmszFozaooCnRqJBeQ04Ol7bzuEhApnWu/ 6z+YcC4kmkO9bpOh0sQ7sXKgWLpk6VI9cD97Lv69w9p65AnjBmQDn5Tak8mcpvMakWa1 lHaM3zQB9LWo5dvFjy/l6+RnJAzC3oJsttK1Y= 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=+B1geMfKugZ9/Y0qjQLB48rxQUh2J0QAO4pKzK9MPtc=; b=MnWNLhtajsdrUtsDJsJR3N9AttYxFjuq1jHdhhqThK7zn7GTPNQY87cHUkDTx2N7Vc aAZuEvcVuybYszPsIJJjSc00DRFpLy32ZYp6AVdyTFSdHUyWMmoWYoUCcsSOMGoTT5ta /Gcmc5CZspPLnBx3r7+7ZGzz4Jo+Yb3UtqzJw/41Qy1txdtR3bZ8iF+O31IZLTzw3uab oPnJRZpj2nVCekH5hJ3sOsNXQY1xWlOQPXthde5yiQPlouS0/rhqkv8OLhN3q5goMXCz D2SUKWNVtSqf9EKw85zgrdKP51YMkB+j48ZtYz1Y+wRdayqqVpgXdPzKNVgbf5Ke7wIJ Ijsg== X-Gm-Message-State: ANhLgQ3Yrb5XBI7zVCQZs8tWWT/Exsw1JkdDxE7u0I20ir9RKDuJt9oo WXRfwFEt0/ngADBVm+GXeVijgQ== X-Google-Smtp-Source: ADFU+vt6v0+EF3++rFKijcSaojGu0jqGRlv6a89byICbegBod4UGPa8P3gUncs01N8yuFqjTtyMQTQ== X-Received: by 2002:a05:6214:1404:: with SMTP id n4mr374856qvx.237.1583446417238; Thu, 05 Mar 2020 14:13:37 -0800 (PST) Received: from joelaf.cam.corp.google.com ([2620:15c:6:12:9c46:e0da:efbf:69cc]) by smtp.gmail.com with ESMTPSA id n8sm16366198qke.37.2020.03.05.14.13.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Mar 2020 14:13:36 -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 linus/master 1/2] rcuperf: Add ability to increase object allocation size Date: Thu, 5 Mar 2020 17:13:22 -0500 Message-Id: <20200305221323.66051-1-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 da94b89cd5310..36f0ed75c7cf3 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -87,6 +87,7 @@ 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); @@ -627,7 +628,7 @@ kfree_perf_thread(void *arg) do { 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; @@ -712,6 +713,8 @@ 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