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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 1D7CBC433DF for ; Wed, 29 Jul 2020 03:46:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F39392074B for ; Wed, 29 Jul 2020 03:46:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726871AbgG2Dq0 (ORCPT ); Tue, 28 Jul 2020 23:46:26 -0400 Received: from inva021.nxp.com ([92.121.34.21]:36562 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726245AbgG2Dq0 (ORCPT ); Tue, 28 Jul 2020 23:46:26 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 1183A200E2A; Wed, 29 Jul 2020 05:46:25 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id F1494200E1C; Wed, 29 Jul 2020 05:46:20 +0200 (CEST) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 014644031D; Wed, 29 Jul 2020 05:46:14 +0200 (CEST) From: Alison Wang To: catalin.marinas@arm.com, will@kernel.org, kurt.kanzenbach@linutronix.de, paulmck@kernel.org, mw@semihalf.com, leoyang.li@nxp.com, vladimir.oltean@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: alison.wang@nxp.com Subject: [RFC PATCH] arm64: defconfig: Disable fine-grained task level IRQ time accounting Date: Wed, 29 Jul 2020 11:39:34 +0800 Message-Id: <20200729033934.22349-1-alison.wang@nxp.com> X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the current arm64 defconfig, CONFIG_IRQ_TIME_ACCOUNTING is enabled as default. According to my tests on NXP's LayerScape and i.MX platforms, the system hangs when running the command "stress-ng --hrtimers 1" with CONFIG_IRQ_TIME_ACCOUNTING enabled. Disabling this option, the issue disappears. CONFIG_IRQ_TIME_ACCOUNTING causes serious performance impact when running hrtimer stress test at the same time. Signed-off-by: Alison Wang --- arch/arm64/configs/defconfig | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index e0f33826819f..ff1c11d8b10b 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -4,7 +4,6 @@ CONFIG_AUDIT=y CONFIG_NO_HZ_IDLE=y CONFIG_HIGH_RES_TIMERS=y CONFIG_PREEMPT=y -CONFIG_IRQ_TIME_ACCOUNTING=y CONFIG_BSD_PROCESS_ACCT=y CONFIG_BSD_PROCESS_ACCT_V3=y CONFIG_TASK_XACCT=y -- 2.17.1