Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp589532imm; Fri, 21 Sep 2018 05:14:34 -0700 (PDT) X-Google-Smtp-Source: ANB0VdY8GalWP1VbYZrigvmAd6EEalr+lXCWWxVdw9Jowij+3s7VVc1vi7wVvOs7vVjgMknVdE8Y X-Received: by 2002:a63:c245:: with SMTP id l5-v6mr41372070pgg.255.1537532074151; Fri, 21 Sep 2018 05:14:34 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1537532074; cv=none; d=google.com; s=arc-20160816; b=TtGgcTIS5clvBwfcFSje23Io0OmVZHc4l6EhS304sW606soXe1dW084QzAatQyxmsu 0d8RS7PG95vz97NUVvMdp5EmL9sWWJ3zVLo8BR2JouUOaNKIxsTOErS5b3/dD+b39otK qI9wnDDMApbgrYS/cB3BRLFYVr0XjvSMqBWFqOUBeUDrWHf3Pw/j0E9erYLIeIX6v+xh gk2jMLmBEVHfQL7/8BTMfR6NBbdbMLuPOeTmnwBQcGVeaFl2RADq21ksA/rmsv+1pKnA g7HqFSSEcTIK1aEN6PBVzYWKhz+pN0s2NQXJZBIYvutRJ7sOv6oiCDKd6WLiqP+H1Lb7 vXSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date; bh=rRix7yBYCGZ8bKBUz8GidSs343BXs0jHWwsdJpD2OoI=; b=L5a+bOwAFP4OXwiAFYXgtXYcVJd0ikTyczhOkhb2quqyLti9hbdYEdU5HnwUY4nWL9 gAHxOQeXWfjTftpAaSLx5oOmRwTFXsabs/sMJab39QiXrV27gvZxReXxmx/7s1z3CF5m ePUP0gUNTHRORniGqdYUm/T++Kn6euRc2x23tk8tKBnRnWLX8grOfQ+wVtE9R94Fdv0x HfjyEZznVYd+a56vGa8LiwOojNXau8MMPHd0in0hpe2YZMbrYaacCouqrG4YjWMv3dZ8 055B64MEgJBwAIPiH9qK30oUOBnG+peiPwquz5onVhX+oiHRfIHXzD0OjpQivmAh+G9H RONA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a93-v6si27977076pla.277.2018.09.21.05.14.17; Fri, 21 Sep 2018 05:14:34 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389890AbeIUSCB (ORCPT + 99 others); Fri, 21 Sep 2018 14:02:01 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:39760 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388850AbeIUSCB (ORCPT ); Fri, 21 Sep 2018 14:02:01 -0400 Received: from hsi-kbw-5-158-153-52.hsi19.kabel-badenwuerttemberg.de ([5.158.153.52] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1g3KJG-0000r9-PL; Fri, 21 Sep 2018 14:13:23 +0200 Date: Fri, 21 Sep 2018 14:13:19 +0200 (CEST) From: Thomas Gleixner To: Sebastian Andrzej Siewior cc: linux-kernel@vger.kernel.org, Daniel Wagner , Peter Zijlstra , Will Deacon , x86@kernel.org, Linus Torvalds , "H. Peter Anvin" , Boqun Feng , "Paul E. McKenney" Subject: Re: [Problem] Cache line starvation In-Reply-To: <20180921120226.6xjgr4oiho22ex75@linutronix.de> Message-ID: References: <20180921120226.6xjgr4oiho22ex75@linutronix.de> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 21 Sep 2018, Sebastian Andrzej Siewior wrote: > We reproducibly observe cache line starvation on a Core2Duo E6850 (2 > cores), a i5-6400 SKL (4 cores) and on a NXP LS2044A ARM Cortex-A72 (4 > cores). We tried to reproduce on AMD, but so far no failure. Thanks, tglx