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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 66CCBC433E0 for ; Mon, 15 Jun 2020 19:12:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34F4C20739 for ; Mon, 15 Jun 2020 19:12:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="GFkQ5RL+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731464AbgFOTMU (ORCPT ); Mon, 15 Jun 2020 15:12:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731282AbgFOTMU (ORCPT ); Mon, 15 Jun 2020 15:12:20 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C808C061A0E for ; Mon, 15 Jun 2020 12:12:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ZUbQNFtJJ5oWctDIi257Z145m0yZxLqv7a/pMBuhmH0=; b=GFkQ5RL++oqCThVe5FU1vNGskh DRFJLD7hXu0Av34tBvocuu4kdTII5HLuCCCRFxbzmvc0peqS5sbQRizZME415dOTqOvWb2EPc5bfE 3SgPZ8BTN1DEr0aFIJlq2KPIOsXru6bKDNVcz+Z1WItRc7lhlaYE84+LFfXLZm2W+vU7LVo2lN5ml Ug7d4vzv2lNzsk+FlIegaZfcqnBWtNxjCin2wCskSy6c4byWQNVfpZ9BWRQkLYCOqN3Y0PtX6otpS ozGzB2gEO+xGdf3UqFNlPyAMoxGxeTmncjQUaEfLyASWptEMLjRW68d6eic7Up6HbQXroTRe3tV+A B7q4x9yQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jkuWW-0006U1-Dd; Mon, 15 Jun 2020 19:12:01 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id AA8533028C8; Mon, 15 Jun 2020 21:11:58 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 94F83203D5DCD; Mon, 15 Jun 2020 21:11:58 +0200 (CEST) Date: Mon, 15 Jun 2020 21:11:58 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: mingo@kernel.org, tglx@linutronix.de, linux-kernel@vger.kernel.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, frederic@kernel.org Subject: Re: [PATCH 0/6] sched: TTWU, IPI, and assorted stuff Message-ID: <20200615191158.GK2531@hirez.programming.kicks-ass.net> References: <20200615125654.678940605@infradead.org> <20200615162330.GF2723@paulmck-ThinkPad-P72> <20200615164048.GC2531@hirez.programming.kicks-ass.net> <20200615172149.GJ2723@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200615172149.GJ2723@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 15, 2020 at 10:21:49AM -0700, Paul E. McKenney wrote: > On Mon, Jun 15, 2020 at 06:40:48PM +0200, Peter Zijlstra wrote: > > Thanks! I've got 16*TREE03 running since this morning, so far so nothing :/ > > (FWIW that's 16/9 times overcommit, idle time fluctuates around 10%). > > My large system as large remote memory latencies, as in the better part > of a microsecond. My small system is old (Haswell). So, just to grasp > at the obvious straw, do you have access to a multisocket Haswell system? I've been running this on a 4 socket haswell ex.