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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 68A87C433DF for ; Tue, 16 Jun 2020 16:31:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 486A2206F1 for ; Tue, 16 Jun 2020 16:31:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592325063; bh=W7Pho91Xm+elkwKelH3qLZlOsIt8PfgFxIc/P+UvK3c=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:List-ID: From; b=vimRECSe62VJ2qhT26Ez4mYJmlvyB2GBZ95ag9uMlGwSJcUM3mHSPXxSx5giljQbB 7iBeOqzYxkyyvjo7UcLfSwdIWmXRJpePR3hUChHJcUzkB1bwMkKgCFQUUpirR4wzrd uRJqeb8VAD2x7LV4Gx1W8xmODJh9N0tcBJWZdwhw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730009AbgFPQbC (ORCPT ); Tue, 16 Jun 2020 12:31:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:60392 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729167AbgFPQbB (ORCPT ); Tue, 16 Jun 2020 12:31:01 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E428E20679; Tue, 16 Jun 2020 16:31:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592325060; bh=W7Pho91Xm+elkwKelH3qLZlOsIt8PfgFxIc/P+UvK3c=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=2O0qAGA8Ilp58adA/TcAICjKIT9bf2cAlJwFNWeobF0GQvp2UTWV57Fhvtuec+bTa ONT2kmCDxsx5ZvUIAN9NSAtLHNna+MiB2MKgrEmHK5SX6vLN/yNFnSzyUqIboF6JVz a9dOhoiBTWb8PWpGmOzIz6fYxsX6ObO+4uwCvMvo= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id C95843521103; Tue, 16 Jun 2020 09:31:00 -0700 (PDT) Date: Tue, 16 Jun 2020 09:31:00 -0700 From: "Paul E. McKenney" To: Peter Zijlstra 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: <20200616163100.GA5370@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <20200615125654.678940605@infradead.org> <20200615162330.GF2723@paulmck-ThinkPad-P72> <20200615164048.GC2531@hirez.programming.kicks-ass.net> <20200615172149.GJ2723@paulmck-ThinkPad-P72> <20200615191158.GK2531@hirez.programming.kicks-ass.net> <20200615195522.GL2723@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200615195522.GL2723@paulmck-ThinkPad-P72> User-Agent: Mutt/1.9.4 (2018-02-28) 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 12:55:22PM -0700, Paul E. McKenney wrote: > On Mon, Jun 15, 2020 at 09:11:58PM +0200, Peter Zijlstra wrote: > > 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. > > OK, I officially have no idea, then! Ah, are you overcommitting? None of my Haswell runs did any overcommit. Also, any failures in the meantime? Any debug/tracing/whatever that I could add to my runs? Thanx, Paul