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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75E6BC433EF for ; Thu, 24 Feb 2022 15:21:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235247AbiBXPWJ (ORCPT ); Thu, 24 Feb 2022 10:22:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236255AbiBXPVq (ORCPT ); Thu, 24 Feb 2022 10:21:46 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CD181B4035 for ; Thu, 24 Feb 2022 07:21:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=qvM8jMFqdhB8ggMaZ8z1CU+Zz5sAw6Hp+J/ntKdwyaM=; b=fSEXEEkFMLpIgLXbqA2nOecSt5 9GyadfrtfRSW11ywgU3aKH8kLQRavn57Qv/KH4s1T91yhBZDkCOEvr+un/C9eQmmc4nz9/6JOm/dY J0GP1wvipeR3YCNQWhMc4ZRKfu7JNQuyWAy5Zey6KY7njrcUwG3bwJAP9r4TKRrzP/P6Rty8J3O6M JXdnafq+WuREFPHtPj3AZcnbGNVskgUV0xqR/2JAHWncXx9h6i6Oa1aa7zVcV1WIwyCJxjUc7cJDQ ioNFRqztEASVyMmeXhpvXwJbuSTOSjusqRmok9JiS+7jAXNHRsmw4MPzQRGxoTjCvk6XglWQ8vqsD ohuEpbFg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNFvE-00CeY9-Aj; Thu, 24 Feb 2022 15:20:49 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 9FC3C300230; Thu, 24 Feb 2022 16:20:47 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 89ECB20164DD3; Thu, 24 Feb 2022 16:20:47 +0100 (CET) Date: Thu, 24 Feb 2022 16:20:47 +0100 From: Peter Zijlstra To: Abel Wu Cc: Ben Segall , Daniel Bristot de Oliveira , Dietmar Eggemann , Ingo Molnar , Juri Lelli , Mel Gorman , Steven Rostedt , Vincent Guittot , linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 0/5] introduce sched-idle balancing Message-ID: References: <20220217154403.6497-1-wuyun.abel@bytedance.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220217154403.6497-1-wuyun.abel@bytedance.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 17, 2022 at 11:43:56PM +0800, Abel Wu wrote: > Current load balancing is mainly based on cpu capacity > and task util, which makes sense in the POV of overall > throughput. While there still might be some improvement > can be done by reducing number of overloaded cfs rqs if > sched-idle or idle rq exists. I'm much confused, there is an explicit new-idle balancer and a periodic idle balancer already there.