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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 D8613C2BA19 for ; Wed, 15 Apr 2020 17:19:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC6C220784 for ; Wed, 15 Apr 2020 17:19:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586971198; bh=f2uTFvB1xQFCUlTsuOApZX3dSPo3R6WNQf9VjWNNxj0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=j3q6iXQbocNSy56W2Zs9Vz93F0qvJ5mo/DgfYGVoHwWictGvxmOjHPEZQC5qVBDsl 93aS2cPclxSMaSYoDgj/qiydhObPTQGg89q9qjBgnRHCAY5Y7nUa+W2k3yZjUwLzP2 IMhRAfElgddkX2bPLDc/qcHXM70qPdGobIv9yjyY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2410795AbgDORT5 (ORCPT ); Wed, 15 Apr 2020 13:19:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:33300 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404505AbgDORTx (ORCPT ); Wed, 15 Apr 2020 13:19:53 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6B0A62076D; Wed, 15 Apr 2020 17:19:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586971192; bh=f2uTFvB1xQFCUlTsuOApZX3dSPo3R6WNQf9VjWNNxj0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V/Y2qI3D4zpEpEPfVu8dcD3rYNRdU5/2fPZcKmA1QD4DjQ44QhOEkoMFkdCt+JE9v YcHOhV0XZSirZKooKdkJaf8zKhdC3VbuXNS96ClfwakQnVUB4Pm+WBQuMxcNWv/bZu hyBQl28g0NkxIWRwO90blk8O/b5KMFfOFvECSt+Y= From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E . McKenney" Subject: [PATCH tip/core/rcu 1/4] rcuperf: Add ability to increase object allocation size Date: Wed, 15 Apr 2020 10:19:47 -0700 Message-Id: <20200415171950.9424-1-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200415171924.GA9270@paulmck-ThinkPad-P72> References: <20200415171924.GA9270@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Joel Fernandes (Google)" This allows us to increase memory pressure dynamically using a new rcuperf boot command line parameter called 'rcumult'. Signed-off-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney --- 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 a4a8d09..16dd1e6 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) { -- 2.9.5