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=-5.8 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 D37A8C433E0 for ; Tue, 9 Feb 2021 07:54:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 94EAD64EAA for ; Tue, 9 Feb 2021 07:54:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229521AbhBIHyL (ORCPT ); Tue, 9 Feb 2021 02:54:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229544AbhBIHyE (ORCPT ); Tue, 9 Feb 2021 02:54:04 -0500 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54FDDC061788 for ; Mon, 8 Feb 2021 23:53:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.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=3gOG9mayuPRITYpE4PJ6WJPHCQ1vybdblsZqw9M3u7k=; b=2bdHBsO2BbQWSjn8fiMam99DVg OA2WHtpg/L+j4iYChqJ796qeWJKYRKDrEfU+ENjzZ2HWcx1NCiHhoGllsmzW4zVMi2sZuV4TjGdT9 PM200E20M79IMScOQTWhGOk6qpy9q1mUvSLQaglTtY5FTEX+ARpK5wlv1u2z6sqwISiSiOnSDvsFu YNDdT+lBTHZztqJfmmw0HTQ591ZopGe0M9rQNs2UVCbcm4goGrSSCAj29+SVJCzGYONqyKQypr+1x 6SEUzkwPjehtGfBqPpLfr0kRm1A2nYGSmJ2WnqTB9hQFAPKSiI1Rh9EJQzWVfijF/7u/bE9IEk3UP F+6NcBFA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1l9Npj-0006EM-Ka; Tue, 09 Feb 2021 07:53:15 +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 9F42830066E; Tue, 9 Feb 2021 08:53:10 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 72E6C2040C5A8; Tue, 9 Feb 2021 08:53:10 +0100 (CET) Date: Tue, 9 Feb 2021 08:53:10 +0100 From: Peter Zijlstra To: Leonardo Bras Cc: Sebastian Andrzej Siewior , Ingo Molnar , Thomas Gleixner , "Paul E. McKenney" , Wei Yongjun , Qais Yousef , linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/1] kernel/smp: Split call_single_queue into 3 queues Message-ID: References: <20210128065506.618426-1-leobras.c@gmail.com> <20210128103348.rtbtffmvt7mwjohx@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 08, 2021 at 02:03:47PM -0300, Leonardo Bras wrote: > > with the patch at the bottom of the mail. This shows that in my > > smoke test at least, the number of items in the individual list is low. > > Yes, but depending on workload this list may get longer. Get a median number of entries on the list, if you can get your median anywhere near large enough to any of this to matter I'd be very surprised. This needs lots of numbers..