From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from EUR01-DB5-obe.outbound.protection.outlook.com (mail-eopbgr150052.outbound.protection.outlook.com [40.107.15.52]) by sourceware.org (Postfix) with ESMTPS id 40D9E3856DC1 for ; Wed, 25 May 2022 09:42:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 40D9E3856DC1 ARC-Seal: i=2; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=pass; b=Htn8F+Ok43QuHIRpoIjqZUb4hTrdCkU82b2M3j0vLDSda0j/y778T2yqtef2aCr4sjDttkjWezriB1+FAgISb4nD5m0kipHzGQTot/qzF9DL9VPfpX5KqE3FGuAw0ids8Nx4QI6keOrrRcGHY6It6XO1E7tn0nzcXZQ4rWHW554qOK7Cf48R2aWy7Tw25kuBiYTbQrzPHnpOoIRjl5Zq6BKbDEwQq9hICEOGytJxhyauA+RLfYnLsPihoZKvqlcRNH+wc2eAuq+rBkq36vBq2nzt12+SMaNUabIhoXnHnrDYr5r1xHkYTRiBkG81a6CF8TGOoZzkOFbvI17+fx8M3w== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=S3YFDjWpz2IY/P7ryswJVey5oBjpkAbbnZ2pC2XntdE=; b=cGwrNQYMnULH+DuuRLbejtJy8qDsijdfHSCf5M0rzElvsobUSQDFUVuLGRnis55iKmYJi3T7L94ri6Se7UnDB3wy8hV8Ek+GrKfRdkycigPI/7J0M5zp3arHT6rtIZVrLeemcyFtfcHPAaXtC7F15EbPClnGOiYkByFBdGhaUNaexaVZLk26L24RFgAcZ2uOGnrbt/er4Mqr+7KtK2afObiU7IfGaW7C00Heb+liNEi8chVLlGXmFudktOaRAgYF7bn2NGgXvrngDD+Dmeo0w1rKtHOIpC7acA8orkC5iM643b3akaBmH2k9mooHtwqDWCpM/LHKrte2TxYdSwhNGA== ARC-Authentication-Results: i=2; mx.microsoft.com 1; spf=pass (sender ip is 63.35.35.123) smtp.rcpttodomain=sourceware.org smtp.mailfrom=arm.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=arm.com; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com; arc=pass (0 oda=1 ltdi=1 spf=[1,1,smtp.mailfrom=arm.com] dkim=[1,1,header.d=arm.com] dmarc=[1,1,header.from=arm.com]) Received: from AM6P191CA0004.EURP191.PROD.OUTLOOK.COM (2603:10a6:209:8b::17) by AM5PR0801MB2113.eurprd08.prod.outlook.com (2603:10a6:203:2f::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5293.13; Wed, 25 May 2022 09:41:59 +0000 Received: from AM5EUR03FT006.eop-EUR03.prod.protection.outlook.com (2603:10a6:209:8b:cafe::9f) by AM6P191CA0004.outlook.office365.com (2603:10a6:209:8b::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5273.15 via Frontend Transport; Wed, 25 May 2022 09:41:59 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 63.35.35.123) smtp.mailfrom=arm.com; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com;dmarc=pass action=none header.from=arm.com; Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 63.35.35.123 as permitted sender) receiver=protection.outlook.com; client-ip=63.35.35.123; helo=64aa7808-outbound-1.mta.getcheckrecipient.com; pr=C Received: from 64aa7808-outbound-1.mta.getcheckrecipient.com (63.35.35.123) by AM5EUR03FT006.mail.protection.outlook.com (10.152.16.122) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5293.13 via Frontend Transport; Wed, 25 May 2022 09:41:59 +0000 Received: ("Tessian outbound 361d68419a2f:v119"); Wed, 25 May 2022 09:41:59 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: e8f2718f5b9c612e X-CR-MTA-TID: 64aa7808 Received: from a6ad96aba589.1 by 64aa7808-outbound-1.mta.getcheckrecipient.com id A9643B3B-0357-471A-A104-5FEB69AFC1E8.1; Wed, 25 May 2022 09:41:52 +0000 Received: from EUR04-DB3-obe.outbound.protection.outlook.com by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id a6ad96aba589.1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Wed, 25 May 2022 09:41:52 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=XmR53g3S1CCDML+j0WoWP3yq2JW6CWVsGtuRg5xeqi4FP+2a1qp2/vfmccb/QjCuf4JShsyylGs15wO4jEqubxp58QOqM0bqbYrApkVELTVTJZTA2cS1g+DzvlL/ddtn4Y3uNvZdt63Bi6xAcPe3saRsphSF4c07k9rlKO2a0ABBIEJayGUD+mzZorRPoOPtJHQABEjDXZ8JN9ovOPKuu4uXFTTgItoxBF0Exe/b2lUp0qhwkX0I734e3irP7OenPnZY+/0VwI/TKUcE9HuNDHoOq3JDRPvYzi+b6TSW+xU0N03OrZbowgjD02aycKEQVryJl0jI50WMlONXPzfIIw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=S3YFDjWpz2IY/P7ryswJVey5oBjpkAbbnZ2pC2XntdE=; b=BttyRMAyVC9fzdaV4XC/shRl0iA4uaH4wIshA7S02y0he+BlWj9uWqmIaNisn8ee0sw1Hk5PqqwUj/8TyobVgKRB09xSqSUZcRgx9JEKhiByPu2UqRKabYBfzVTdU5ueFYarkBK7jV05FljR5TGQC296rp1oBQ6frKEIdvxsYupPRLnTSKGSoB9zv/ruQGPv9/Qiy18N9S0q9IElAut/v1xuHuH548MLmgLcmgXGrFoa0SAYjUbM4vHpMkT/UcVHcr7S3OpiJ3trjX8EL9e8RVIliZj5aGhCWcXxLjBDD85sVWtkzMu8aEcqyCLQSOMUYbgv22hts9MJh2nwZyRYEw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=arm.com; dmarc=pass action=none header.from=arm.com; dkim=pass header.d=arm.com; arc=none Authentication-Results-Original: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=arm.com; Received: from VI1PR08MB3919.eurprd08.prod.outlook.com (2603:10a6:803:c4::31) by DB9PR08MB6714.eurprd08.prod.outlook.com (2603:10a6:10:2a4::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5273.15; Wed, 25 May 2022 09:41:51 +0000 Received: from VI1PR08MB3919.eurprd08.prod.outlook.com ([fe80::7080:6233:cf8f:a8a6]) by VI1PR08MB3919.eurprd08.prod.outlook.com ([fe80::7080:6233:cf8f:a8a6%7]) with mapi id 15.20.5273.023; Wed, 25 May 2022 09:41:50 +0000 Message-ID: <3379f03d-4a3d-8da8-5548-3ffc321cf78f@arm.com> Date: Wed, 25 May 2022 10:41:49 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [Ping] [PATCH 0/4] Add AMX support. Content-Language: en-US To: "Willgerodt, Felix" , John Baldwin , "gdb-patches@sourceware.org" References: From: Luis Machado In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: LO4P123CA0139.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:193::18) To VI1PR08MB3919.eurprd08.prod.outlook.com (2603:10a6:803:c4::31) MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: 3023e4d9-1ca8-400a-f073-08da3e32d07a X-MS-TrafficTypeDiagnostic: DB9PR08MB6714:EE_|AM5EUR03FT006:EE_|AM5PR0801MB2113:EE_ X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:VI1PR08MB3919.eurprd08.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230001)(4636009)(366004)(66946007)(6512007)(8676002)(86362001)(66556008)(31696002)(66476007)(6506007)(31686004)(36756003)(53546011)(26005)(316002)(508600001)(966005)(38100700002)(6486002)(8936002)(2906002)(110136005)(186003)(83380400001)(44832011)(5660300002)(15974865002)(2616005)(45980500001)(43740500002); DIR:OUT; SFP:1101; X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB6714 Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=arm.com; X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: AM5EUR03FT006.eop-EUR03.prod.protection.outlook.com X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id-Prvs: 14dd4bbb-3efe-4d92-2920-08da3e32cb52 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:63.35.35.123; CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(13230001)(4636009)(36840700001)(46966006)(40470700004)(83380400001)(8936002)(47076005)(81166007)(316002)(15974865002)(2616005)(5660300002)(336012)(44832011)(31686004)(82310400005)(6506007)(26005)(53546011)(2906002)(40460700003)(6512007)(36860700001)(70586007)(356005)(966005)(508600001)(110136005)(70206006)(36756003)(6486002)(8676002)(86362001)(31696002)(186003)(43740500002); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 May 2022 09:41:59.2726 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3023e4d9-1ca8-400a-f073-08da3e32d07a X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR03FT006.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM5PR0801MB2113 X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE, UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 May 2022 09:42:05 -0000 On 5/25/22 10:14, Willgerodt, Felix via Gdb-patches wrote: >> -----Original Message----- >> From: John Baldwin >> Sent: Freitag, 20. Mai 2022 18:29 >> To: Willgerodt, Felix ; gdb- >> patches@sourceware.org >> Subject: Re: [Ping] [PATCH 0/4] Add AMX support. >> >> On 5/20/22 7:40 AM, Willgerodt, Felix via Gdb-patches wrote: >>> *Ping* >>> >>> I have adapted all of Eli's comments on documentation locally. >>> They were all straightforward, so I didn't post a v2 for those yet. >> >> I don't have any further feedback. I will say that I think it's fine to not >> support dynamic tile sizes. I think the aarch64 arch in GDB uses the same >> approach with respect to SVE which is to say that the SVE vector size >> is fixed for a given process' lifetime (or something along those lines). >> > > I couldn't try SVE myself, but it seems like SVE is actually updated at each > BP, at least for native Linux GDB targets, > see aarch64_linux_nat_target::thread_architecture(). > > We tried implementing it that way as well, but the gdbserver > infrastructure to handle target description updates doesn't really exist. That is the main barrier for supporting vector/matrix length updates mid-execution for remote targets. There was some early discussions here: https://sourceware.org/pipermail/gdb/2020-January/048274.html But there wasn't much consensus on the best way to do it. Ideally we'd have a proper sizeless type to describe the scalable vector/matrix, based on a dynamic property (a register, for example). But that requires many more changes. > > That said, I don't think a fixed AMX dimension would provide a good > user experience though. Neither in the case of showing the whole > register nor when using a fixed dimension for a process' lifetime.> > Regards, > Felix > Intel Deutschland GmbH > Registered Address: Am Campeon 10, 85579 Neubiberg, Germany > Tel: +49 89 99 8853-0, www.intel.de > Managing Directors: Christin Eisenschmid, Sharon Heck, Tiffany Doon Silva > Chairperson of the Supervisory Board: Nicole Lau > Registered Office: Munich > Commercial Register: Amtsgericht Muenchen HRB 186928