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=-4.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 5FF5DC433DF for ; Wed, 29 Jul 2020 08:40:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3441120838 for ; Wed, 29 Jul 2020 08:40:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="t6PkU2q3"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="e3pNxZN4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727964AbgG2Ikd (ORCPT ); Wed, 29 Jul 2020 04:40:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726336AbgG2Ikc (ORCPT ); Wed, 29 Jul 2020 04:40:32 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 286B5C061794 for ; Wed, 29 Jul 2020 01:40:32 -0700 (PDT) From: Kurt Kanzenbach DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1596012030; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=4LCjeGJpW4pRVYi1eLYqbWJFyRnJudboor6NQDbeb54=; b=t6PkU2q3bp2ma+U68h7q6mcQN2qiLxZo+KMZAWJm9VwrzUjWFebpTFrXhmY/wgsQ393EBV MELhUDf2jMs6eORs8NLADjRR1k0BvQ5Rsw9tceDhx4PfxOqcpy+siIQOWMj6H4ftu5fwxc uiDMO2/AjTxvjBo6SRLqv5uQm70PSM8pOZJfn9ogYeAAQq8n9cAdFGOmHyKHsjmYbTrVaz ymwbFAUuqi+KETvgZP+YG4/bKjRkr6GLmRBnitUbZN9x04fZ4jRZCWU10u4emOrA9BjUv0 lzu9L3Na3EyL7VyFYMF3oUf/nDPAeHKTz/mRJSaFO/pkJZNt2SeR6jjD9Qckvg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1596012030; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=4LCjeGJpW4pRVYi1eLYqbWJFyRnJudboor6NQDbeb54=; b=e3pNxZN41wFtpnA4LNXpl9jFk14S3QKaJWjCnYR33VgZEMbp41vPWxmrC+PhOBv9HRgGL1 8cZpvbWW9dinB/Bw== To: Alison Wang , catalin.marinas@arm.com, will@kernel.org, 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, Thomas Gleixner , Anna-Maria Gleixner Subject: Re: [RFC PATCH] arm64: defconfig: Disable fine-grained task level IRQ time accounting In-Reply-To: <20200729033934.22349-1-alison.wang@nxp.com> References: <20200729033934.22349-1-alison.wang@nxp.com> Date: Wed, 29 Jul 2020 10:40:29 +0200 Message-ID: <877dumbtoi.fsf@kurt> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-=-= Content-Type: text/plain Hi Alison, On Wed Jul 29 2020, Alison Wang wrote: > 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. I think instead of disabling the option for all arm64 devices, it might be better to analyze the root-cause why the hrtimer test hangs when this option is enabled. +Cc hrtimer maintainers: Thomas and Anna-Maria Thanks, Kurt --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEooWgvezyxHPhdEojeSpbgcuY8KYFAl8hNf0ACgkQeSpbgcuY 8KYpxQ//RjoQxUEmK/uS9tpUYaIyXBsdzn1QHI+DocwbnDs2kQZWBS6lEaibJsTN U1f/ZVzo8kXCMKT4Nw0PZUF2RMKoD3+BM7Gvp9qIW8cOcISf+BkxVZDQzgLwdnny 9Mj6eeDD3JAkDYvWIlHfnG8t7x8yrTTVapEUsslv8qDwmzu8/GaAi7wIdSGRja+3 1XStS4ZO7IAdl1hxR6sFdkZKT4vxWc96F0V9Pv18MttddCvhs/S5EdeaBWWic2Rk 4fAxYPycj1HJORz0PIc05vFE6dglAMjrN5lKdq6w487eeDStBNJncjhyEPspJqSD /ASSvXu4Ow65MAtEfzqJ8Iaw4SEi5Z3nF0iPeTNGAy2TnEHK5mGgSalVIf+mE7OT cm2+mE62B3pOGRYWju8VXjay/scJ62NT6DZX+NWBsAcvoik0g16iUo+89wxmB2IN OU7fBTm3y9tX7QpvLn5RjkEQsWdypeAshb3vQrhvefjbZ1pSpqbjEC/AOrHDVPSH AUG/OrImA1PB1sUA5fjhD4GmJ6zGmFfwrRheEWqGJeDoBrVcmgO0OSIjVqY888G8 PcQV8j65TrCCrhYLX8N1WF+7pOHouWADGNVrtrWAo1D7Gr+7rNql7LebQxUyTzEU sT2KRBxmrfkkJMFCGTVtFEM68dqXtnrWIXlA6lGRnAqEo/qNmh8= =XV1c -----END PGP SIGNATURE----- --=-=-=--