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 10D33C7EE24 for ; Fri, 2 Jun 2023 07:01:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234160AbjFBHA7 (ORCPT ); Fri, 2 Jun 2023 03:00:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234114AbjFBHAm (ORCPT ); Fri, 2 Jun 2023 03:00:42 -0400 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 30E48E51; Fri, 2 Jun 2023 00:00:35 -0700 (PDT) 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=qIXWERo/5mBFHk32MXDQmFK2NEQeMdXkkddg8rxcan8=; b=GGuIqeWdaba7AOsx85ARJWgKjM uk8SbyVwf4xlrO8+V0O+2PsNjaycUsbSuhUyAqiKlXay62e8Te5AIPQvEegLuanH8Rqe3+rkguZ73 y5VQC7/BH0nRjvTVmqlz7w8KosU7+EDwLyn6SO4UPxPfNHDyy0vcmpaVhANmfhQJdk6IuJtI2TC6C M578SG/A8GQSMmnRpKo8WZSRUliViV4hFjCzHNkqVkczF6snEbvzVV+2h6HAqgwaRZAscEtkFM+KA jEGmfo05BEnZPtyOjAIaKknjF1I+XOd3i85Ygao0BtJNoSFn9SznrBa5f3/k7eIFV9yUa+kQ2Sav6 4X6/MATA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1q4ylx-001G9O-1O; Fri, 02 Jun 2023 07:00:29 +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 0848730031F; Fri, 2 Jun 2023 09:00:29 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E463F214120A1; Fri, 2 Jun 2023 09:00:28 +0200 (CEST) Date: Fri, 2 Jun 2023 09:00:28 +0200 From: Peter Zijlstra To: K Prateek Nayak Cc: linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org, Tejun Heo , x86@kernel.org, Gautham Shenoy Subject: Re: [tip: sched/core] sched/fair: Multi-LLC select_idle_sibling() Message-ID: <20230602070028.GC620383@hirez.programming.kicks-ass.net> References: <168553468754.404.2298362895524875073.tip-bot2@tip-bot2> <3de5c24f-6437-f21b-ed61-76b86a199e8c@amd.com> <20230601111326.GV4253@hirez.programming.kicks-ass.net> <20230601115643.GX4253@hirez.programming.kicks-ass.net> <20230601120001.GJ38236@hirez.programming.kicks-ass.net> <20230601144706.GA559454@hirez.programming.kicks-ass.net> <7bee9860-2d2a-067b-adea-04012516095c@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7bee9860-2d2a-067b-adea-04012516095c@amd.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 02, 2023 at 10:43:37AM +0530, K Prateek Nayak wrote: > This makes sense but I wonder if new domain will add more load balancing > jitters. Also this will require larger evaluation with some more diverse > workloads. Always the case, isn't it :-) > Let me go check if we can get find the NPS2/NPS4 boundary when > in NPS1 mode. Yeah, that would be nice; if not you can see if you can reverse engineer them from FMS and the topology bits we do have and file a request with your hardware people to pretty please expose this going forward.