From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 77B46439A7; Tue, 23 Jan 2024 12:43:07 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 68594410F2; Tue, 23 Jan 2024 12:43:07 +0100 (CET) Received: from NAM11-BN8-obe.outbound.protection.outlook.com (mail-bn8nam11on2041.outbound.protection.outlook.com [40.107.236.41]) by mails.dpdk.org (Postfix) with ESMTP id E801542D92 for ; Tue, 23 Jan 2024 12:43:05 +0100 (CET) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=OatnHJ89HejFG7yU1XDYQX9dMbGgpDOaSuXcVU9OuYdDIeV3BaOO+mPeatfNGt88G+71gyhe/pS/EB/nVY1gzTfvkj/N15A9qmYvhMtie1zTHQ+3r1oh1W3YDBBpY8/Hb53ECk28GOH4iPbN9pX3W/JmOEwLgXc7MrNFM7Xc1ByMCPg9V8qN0dhPaD4x30orPxKhWj3U2CNfCuRI5dsQ06W/e+ScqBjQtuc7iQ/jw5OFN1dbTG+38GzfFA4+n+Pk8D+sPpnR8Uyyqr4CVwD7xdorVHAHKFlGafcJkO5MPqYMTGJQ7TFl6Y6aUY5+MNR7G3fvA3ON4ja3UtaVyBKyqg== ARC-Message-Signature: i=1; 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b=nWOwedYwiK0tGhB0maJhZISorlK8ybXmVKNsZIUdxUmPEbqC/NFoONzvXIspIH+YWPNUhaLIJn9NbAMj29XUsPrGJRcdC8nEQGpyn7Yae7DNe8l4cIFQXopmR8+Y7GIw3Gf4SFMT50EmxLy411A9bnwA1iwgTfmEY0+E+F+W2GA= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from CH2PR12MB4294.namprd12.prod.outlook.com (2603:10b6:610:a9::11) by PH7PR12MB6585.namprd12.prod.outlook.com (2603:10b6:510:213::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7202.37; Tue, 23 Jan 2024 11:43:03 +0000 Received: from CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::815a:45e6:cf5e:479f]) by CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::815a:45e6:cf5e:479f%4]) with mapi id 15.20.7202.035; Tue, 23 Jan 2024 11:43:03 +0000 Message-ID: <4d14b304-f20f-4484-bce9-9c3338d37750@amd.com> Date: Tue, 23 Jan 2024 11:42:57 +0000 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/8] optimize the firmware loading process Content-Language: en-US To: Chaoyong He , "dev@dpdk.org" Cc: oss-drivers References: <20240115025419.2447759-1-chaoyong.he@corigine.com> <94398a42-9bdb-4df2-b4e0-bba289cb2405@amd.com> <009856cb-bfef-437f-a62c-98c2c617f61f@amd.com> From: Ferruh Yigit Autocrypt: addr=ferruh.yigit@amd.com; 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dev@dpdk.org >>>> Cc: oss-drivers >>>> Subject: Re: [PATCH 0/8] optimize the firmware loading process >>>> >>>> On 1/15/2024 2:54 AM, Chaoyong He wrote: >>>>> This patch series aims to speedup the DPDK application start by >>>>> optimize the firmware loading process in sereval places. >>>>> We also simplify the port name in multiple PF firmware case to make >>>>> the customer happy. >>>>> >>>> >>>> <...> >>>> >>>>> net/nfp: add the elf module >>>>> net/nfp: reload the firmware only when firmware changed >>>> >>>> Above commit adds elf parser capability and second one loads firmware >>>> when build time is different. >>>> >>>> I can see this is an optimization effort, to understand FW status >>>> before loading FW, but relying on build time seems fragile. Does it >>>> help to add a new section to store version information and evaluate based >> on this information? >>>> >>> >>> We have a branch of firmware (several app type combined with >>> NFD3/NFDk) with the same version information(monthly publish), so the >> version information can't help us, because we can't distinguish among them. >>> >>> But the build time is different for every firmware, and that's the reason we >> choose it. >>> >> >> If version is same although FW itself is different, isn't this problem on its own? >> Perhaps an additional field is required in version syntax. > > Actually, it's just the role the build time which embed in the firmware plays, which is unique for every firmware, and which can't be modified once the firmware was published. > I see it is already in the elf binary but relying on build time of a FW to decide to load it or not looks a weak method to me, and fragile as stated before. > What you said also has its mean, but in practice we can't accept(at least can't do it immediately), which needs to discuss with firmware team. > As it is an optimization I assume it is not urgent, so would you mind discussing the issue with the FW team, perhaps it can lead to a better solution, we can proceed after that. Meanwhile I will continue with remaining patches, excluding these two patches. > If you insist that we should change the design, maybe we can just kick off two commits, and upstream the other commits? > - net/nfp: add the elf module > - net/nfp: reload the firmware only when firmware changed