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b=sy1VLBSdQWa6nCc2m6ZQ/DikY384TCu8GSyO3NFOTbb2zp0BRyEQCkXXp1GQTscEnGLnBVnj9mYDhaMmyLffOHif6SsqbcV+ITfg8fSgIHJqbbTZkoY242m6ei8eb+AiN6X16suTGiwLL7uKlUls0WBX79/D1fIptIuYUT/DXqQ= 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 IA0PR12MB8693.namprd12.prod.outlook.com (2603:10b6:208:48e::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6954.21; Thu, 2 Nov 2023 21:06:30 +0000 Received: from CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::2569:edb2:670f:816f]) by CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::2569:edb2:670f:816f%6]) with mapi id 15.20.6954.019; Thu, 2 Nov 2023 21:06:30 +0000 Message-ID: <4ea2098f-2dc7-452a-a9ee-439f2ce9447c@amd.com> Date: Thu, 2 Nov 2023 21:06:20 +0000 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] net/dpaa2: change threshold value Content-Language: en-US From: Ferruh Yigit To: "Sachin Saxena (OSS)" , Hemant Agrawal , Sachin Saxena Cc: dev@dpdk.org, Tianli Lai References: <20230508104133.3566-1-laitianli@tom.com> <39287f68-e5b3-4118-9593-b44dcd121cfd@amd.com> Autocrypt: addr=ferruh.yigit@amd.com; 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Please take care when clicking >>>> links or opening attachments. When in doubt, report the message using >>>> the 'Report this email' button >>>> >>>> >>>> this threshold value can be changed with function argument nb_rx_desc. >>>> >>>> Signed-off-by: Tianli Lai >>>> --- >>>>   drivers/net/dpaa2/dpaa2_ethdev.c | 2 +- >>>>   1 file changed, 1 insertion(+), 1 deletion(-) >>>> >>>> diff --git a/drivers/net/dpaa2/dpaa2_ethdev.c >>>> b/drivers/net/dpaa2/dpaa2_ethdev.c >>>> index 679f33ae1a..ad892ded4a 100644 >>>> --- a/drivers/net/dpaa2/dpaa2_ethdev.c >>>> +++ b/drivers/net/dpaa2/dpaa2_ethdev.c >>>> @@ -829,7 +829,7 @@ dpaa2_dev_rx_queue_setup(struct rte_eth_dev *dev, >>>>                                                  dpaa2_q->cgid, >>>> &taildrop); >>>>                  } else { >>>>                          /*enabling per rx queue congestion control */ >>>> -                       taildrop.threshold = CONG_THRESHOLD_RX_BYTES_Q; >>>> +                       taildrop.threshold = nb_rx_desc * 1024; >>>>                          taildrop.units = DPNI_CONGESTION_UNIT_BYTES; >>>>                          taildrop.oal = CONG_RX_OAL; >>>>                          DPAA2_PMD_DEBUG("Enabling Byte based Drop on >>>> queue= %d", >>>> -- >>>> 2.27.0 >>>> >>> Hi Tianli, >>> >>> The number of bytes based tail drop threshold value >>> "CONG_THRESHOLD_RX_BYTES_Q" is an optimized value for dpaa2 platform. we >>> concluded this value after multiple benchmark experiments in past. >>> Although, number of frame based threshold value is "nb_rx_desc" based only. >>> We will further review this suggestion and get back. >>> >> >> Hi Sachin, What is the status of this patch? >> > > Ping > Hi Sachin, Hemant, If you believe current threshold value is more optimized value, please reject this patch, instead of letting it stuck around. Or @Tianli if you have more arguments to prove this is better value, can you please share them to help maintainers?