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=-3.8 required=3.0 tests=BAYES_00,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 039C0C433DF for ; Wed, 22 Jul 2020 07:54:59 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A39E92077D for ; Wed, 22 Jul 2020 07:54:58 +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="CEqxqaNL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A39E92077D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4BBSRh6ws8zDqNg for ; Wed, 22 Jul 2020 17:54:56 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=infradead.org (client-ip=2001:8b0:10b:1231::1; helo=merlin.infradead.org; envelope-from=peterz@infradead.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=merlin.20170209 header.b=CEqxqaNL; dkim-atps=neutral Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4BBSG1468rzDqs3 for ; Wed, 22 Jul 2020 17:46:33 +1000 (AEST) 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=UtSNhIf2wpJr1Xu6wPJnrBrzTE5gyQVve7CwYw8dNtc=; b=CEqxqaNLXFqUG0/lq8sCbUl+px +zsCBZ4wSYjVTZHgYdhKLg3OX0lReiMHBKKpiKdNHddVDCRuFcaH09IDFHyDMEnoZJD0F35A1VWjM zgQ517U0gTMd5TwWkv0RPleM/CJ67f7CaDg6F6HaVzN7MuEE4ookPkJSTqF4ysA25IKDXIn+2M8S1 gDBI70R+Z46A7RgPkPCQtzv1JQnEpRIepHSHWDfQksWAPaJoEU6US7/V7+yeAa9CrDm22fppWKgty Y8eOau7gL12wqclb70XhVVWF6gDTvm3EcdveQr/IojyxQtnWhI0l+U5htoxoZAlxpB7fhRHrCP5nv 1nxbSJnw==; 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 1jy9SN-0003eB-MZ; Wed, 22 Jul 2020 07:46:27 +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 1C57B303A02; Wed, 22 Jul 2020 09:46:24 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id DE71B29A6A87E; Wed, 22 Jul 2020 09:46:24 +0200 (CEST) Date: Wed, 22 Jul 2020 09:46:24 +0200 From: peterz@infradead.org To: Srikar Dronamraju Subject: Re: [PATCH v2 06/10] powerpc/smp: Generalize 2nd sched domain Message-ID: <20200722074624.GP119549@hirez.programming.kicks-ass.net> References: <20200721113814.32284-1-srikar@linux.vnet.ibm.com> <20200721113814.32284-7-srikar@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200721113814.32284-7-srikar@linux.vnet.ibm.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ingo Molnar , Nathan Lynch , Oliver OHalloran , Michael Neuling , Michael Ellerman , Gautham R Shenoy , Jordan Niethe , Anton Blanchard , LKML , Valentin Schneider , linuxppc-dev , Nick Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Jul 21, 2020 at 05:08:10PM +0530, Srikar Dronamraju wrote: > Currently "CACHE" domain happens to be the 2nd sched domain as per > powerpc_topology. This domain will collapse if cpumask of l2-cache is > same as SMT domain. However we could generalize this domain such that it > could mean either be a "CACHE" domain or a "BIGCORE" domain. What's the whole smallcore vs bigcore thing? Would it make sense to have an actual overview of the various topology layers somewhere? Because I'm getting lost and can't really make sense of the code due to that.