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Tue, 03 May 2022 20:55:33 +0100 Message-ID: <04de7df6-3d4a-21e5-7be5-15f2ef88be16@xilinx.com> Date: Tue, 3 May 2022 20:55:32 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [Patch v2] net/netvsc: report correct stats values Content-Language: en-US To: Long Li , Stephen Hemminger CC: "longli@linuxonhyperv.com" , "dev@dpdk.org" , Stephen Hemminger , "stable@dpdk.org" References: <1648143948-17821-1-git-send-email-longli@linuxonhyperv.com> <7f51e773-6ded-b736-fb02-5e3b391353b9@xilinx.com> <20220426154524.49502217@hermes.local> <924d7398-6c78-6318-52f3-d671edfc8aad@xilinx.com> From: Ferruh Yigit In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 7b0918cd-b1a0-4b95-3e80-08da2d3ee351 X-MS-TrafficTypeDiagnostic: DM6PR02MB5388:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 May 2022 19:55:34.8665 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7b0918cd-b1a0-4b95-3e80-08da2d3ee351 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c; Ip=[149.199.80.198]; Helo=[xir-pvapexch01.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT0061.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR02MB5388 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org On 5/3/2022 8:14 PM, Long Li wrote: >> Subject: Re: [Patch v2] net/netvsc: report correct stats values >> >> On 5/3/2022 7:18 PM, Long Li wrote: >>>> Subject: Re: [Patch v2] net/netvsc: report correct stats values >>>> >>>> On Tue, 26 Apr 2022 22:56:14 +0100 >>>> Ferruh Yigit wrote: >>>> >>>>>> if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { >>>>>> - stats->q_opackets[i] = txq->stats.packets; >>>>>> - stats->q_obytes[i] = txq->stats.bytes; >>>>>> + stats->q_opackets[i] += txq->stats.packets; >>>>>> + stats->q_obytes[i] += txq->stats.bytes; >>>>> >>>>> This is per queue stats, 'stats->q_opackets[i]', in next iteration >>>>> of the loop, 'i' will be increased and 'txq' will be updated, so as >>>>> far as I can see the above change has no affect. >>>> >>>> Agree, that is why it was just assignment originally. >>> >>> The condition here is a little different. NETVSC is a master device with >> another PMD running as a slave. When reporting stats values, it needs to add >> the values from the slave PMD. The original code just overwrites the values >> from its slave PMD. >> >> Where the initial values are coming from, 'hn_vf_stats_get()'? >> >> If 'hn_vf_stats_get()' fills the stats, what are the values kept in 'txq->stats.*' >> in above updated loop? > > Yes, hn_vf_stats_get() fills in the stats from the slave PMD. txq->stats values are from the master PMD. Those values are different and accounted separated from the values from the slave PMD. I see, since this is a little different than what most of the PMDs do, can you please put a little more info to the commit log? Or perhaps can add some comments to the code. And still 'stats->rx_nombuf' change is not required right? If so can you remove it in the next version?