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=-19.4 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,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 742EDC4332F for ; Wed, 15 Sep 2021 23:41:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E11161101 for ; Wed, 15 Sep 2021 23:41:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233077AbhIOXnF (ORCPT ); Wed, 15 Sep 2021 19:43:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:44720 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233046AbhIOXnD (ORCPT ); Wed, 15 Sep 2021 19:43:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2AA06610FF; Wed, 15 Sep 2021 23:41:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631749304; bh=UtQiNwo4hRxV3EJARWM9ipVjUEeL33HvKLetCScJ6Qs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FU6YUdFqOQsVm9HC5wKDsFPwbQMZzUjaBfvPHhFxgvxBc5iZJkj3ETrixYuD5nxYH Tgi0PKpXJYHI/S5NAG1/1slAeQacnU7AMMZwRpbhEPIafORSze+HW4afkuhc9nl485 KAy9RX5/H7yUb/havsDTrwA5HlUn06WfSqGkxRiqlRAprOG70tXO0JDoUNvCffN6sJ 1XZiG8nPjqWo4PFLE6DwtM+aLJeiny4dbnuHhfMwpfcctfnm7f8Idw+GE+NXOkgFWd DgtZmiBRGkZnT9OsfV2RfxqqkfG2jrCOrxR0eFDv/mvNPKq7VlpOub3TaH3cWmNtSH gtZ6cLDNJcdDA== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id EBCFF5C08E8; Wed, 15 Sep 2021 16:41:43 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.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 rcu 4/5] scftorture: Count reschedule IPIs Date: Wed, 15 Sep 2021 16:41:40 -0700 Message-Id: <20210915234141.3907301-4-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20210915234117.GA3907188@paulmck-ThinkPad-P17-Gen-1> References: <20210915234117.GA3907188@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org Currently, only those IPIs that invoke scftorture's scf_handler() IPI handler function are counted. This means that runs exercising only scftorture.weight_resched will look like they have made no forward progress, resulting in "GP HANG" complaints from the rcutorture scripting. This commit therefore increments the scf_invoked_count per-CPU counter immediately after calling resched_cpu(). Fixes: 1ac78b49d61d4 ("scftorture: Add an alternative IPI vector") Signed-off-by: Paul E. McKenney --- kernel/scftorture.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/scftorture.c b/kernel/scftorture.c index 74348abc792b..00bba2bdd4d1 100644 --- a/kernel/scftorture.c +++ b/kernel/scftorture.c @@ -341,6 +341,7 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra cpu = torture_random(trsp) % nr_cpu_ids; scfp->n_resched++; resched_cpu(cpu); + this_cpu_inc(scf_invoked_count); } break; case SCF_PRIM_SINGLE: -- 2.31.1.189.g2e36527f23