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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,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 7AF92C433B4 for ; Fri, 2 Apr 2021 12:20:13 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 EC25961152 for ; Fri, 2 Apr 2021 12:20:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EC25961152 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kaod.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FBfJW34Hvz3c7Z for ; Fri, 2 Apr 2021 23:20:11 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kaod.org (client-ip=178.33.255.19; helo=2.mo51.mail-out.ovh.net; envelope-from=clg@kaod.org; receiver=) Received: from 2.mo51.mail-out.ovh.net (2.mo51.mail-out.ovh.net [178.33.255.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FBfHn4TVqz3btG for ; Fri, 2 Apr 2021 23:19:32 +1100 (AEDT) Received: from mxplan5.mail.ovh.net (unknown [10.108.16.33]) by mo51.mail-out.ovh.net (Postfix) with ESMTPS id 8060B2799CD; Fri, 2 Apr 2021 14:19:28 +0200 (CEST) Received: from kaod.org (37.59.142.98) by DAG4EX1.mxp5.local (172.16.2.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 2 Apr 2021 14:19:27 +0200 Authentication-Results: garm.ovh; auth=pass (GARM-98R002fac2e674-15cb-48a6-8ecc-be0871fa7712, CED0CE0CC895D647B8CFE0BE9502FE01F599FB05) smtp.auth=clg@kaod.org X-OVh-ClientIp: 82.64.250.170 Subject: Re: [PATCH v3 8/9] powerpc/xive: Map one IPI interrupt per node From: =?UTF-8?Q?C=c3=a9dric_Le_Goater?= To: Nicholas Piggin , References: <20210331144514.892250-1-clg@kaod.org> <20210331144514.892250-9-clg@kaod.org> <1617279896.hl1bn8g3eg.astroid@bobo.none> Message-ID: <9f661b26-1633-8e7f-01c4-378dd208de0f@kaod.org> Date: Fri, 2 Apr 2021 14:19:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [37.59.142.98] X-ClientProxiedBy: DAG6EX1.mxp5.local (172.16.2.51) To DAG4EX1.mxp5.local (172.16.2.31) X-Ovh-Tracer-GUID: 1116371b-63d2-4714-9829-6665c9a317ef X-Ovh-Tracer-Id: 851180333645532128 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduledrudeiiedghedtucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhepuffhvfhfkffffgggjggtgfhisehtjeertddtfeejnecuhfhrohhmpeevrogurhhitggpnfgvpgfiohgrthgvrhcuoegtlhhgsehkrghougdrohhrgheqnecuggftrfgrthhtvghrnhepieevheegvdefjefgvdduveekgfejvedtheeuieffudeiueduueffgfetteekkeegnecukfhppedtrddtrddtrddtpdefjedrheelrddugedvrdelkeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehmgihplhgrnhehrdhmrghilhdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomheptghlgheskhgrohgurdhorhhgpdhrtghpthhtohepghhrohhugheskhgrohgurdhorhhg 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: Thomas Gleixner , Greg Kurz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" > I gave the patch below a try and we are reaching the same results, > even better. The simplest solution is always the best. Nick, you > should send that single patch. FYI, here are results in a KVM guests with pinned vCPUs. * P9 DD2.2 - 2s * 64 threads - KVM guest : IPI/sys IPI/chip ----------- -------------------------------- -------------------------------- unhandled unhandled chips cpus noirqdebug detection noirqdebug detection ----------- -------------------------------- -------------------------------- 1 0-15 4.152813 4.084240 4.061028 4.097700 4.042539 4.008314 0-31 8.186328 8.157970 7.937127 8.277942 8.019539 7.831189 0-47 11.391635 11.232960 11.017530 11.278048 10.994501 10.889347 0-63 13.907476 14.022307 11.460280 13.933946 13.506828 11.369188 2 0-79 18.105276 18.084463 8.376047 18.069176 17.587916 15.477006 0-95 22.100683 22.265763 7.338229 22.084006 21.588463 19.502192 0-111 25.305948 25.473068 6.716235 25.429261 24.607570 22.733253 0-127 27.814449 28.029029 6.222736 27.960119 27.253432 23.884916 The three columns "IPI/chip" are results with this series. "IPI/sys" are without. The "unhandled detection" columns are with Nick's patch. C.