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From: Andrew Rybchenko <arybchenko@solarflare.com>
To: Stephen Hemminger <stephen@networkplumber.org>,
	Chengchang Tang <tangchengchang@huawei.com>
Cc: <dev@dpdk.org>, <linuxarm@huawei.com>, <thomas@monjalon.net>,
	<ferruh.yigit@intel.com>
Subject: Re: [dpdk-dev] [RFC] ethdev: add a field for rte_eth_rxq_info
Date: Tue, 23 Jun 2020 18:22:07 +0300
Message-ID: <c43abce3-ced0-1552-3393-53c6bf1b81b7@solarflare.com> (raw)
In-Reply-To: <20200623074831.5ca9a2df@hermes.lan>

On 6/23/20 5:48 PM, Stephen Hemminger wrote:
> On Tue, 23 Jun 2020 14:48:54 +0800
> Chengchang Tang <tangchengchang@huawei.com> wrote:
> 
>> In common practice, PMD configure the rx_buf_size according to the data
>> room size of the object in mempool. But in fact the final value is related
>> to the specifications of hw, and its values will affect the number of
>> fragments in recieving pkts.
>>
>> At present, we seem to have no way to espose relevant information to upper
>> layer users.
>>
>> Add a field named rx_bufsize in rte_eth_rxq_info to indicate the buffer
>> size used in recieving pkts for hw.
>>
>> Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
>> ---
>>  lib/librte_ethdev/rte_ethdev.h | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
>> index 0f6d053..82b7e98 100644
>> --- a/lib/librte_ethdev/rte_ethdev.h
>> +++ b/lib/librte_ethdev/rte_ethdev.h
>> @@ -1306,6 +1306,7 @@ struct rte_eth_rxq_info {
>>  	struct rte_eth_rxconf conf; /**< queue config parameters. */
>>  	uint8_t scattered_rx;       /**< scattered packets RX supported. */
>>  	uint16_t nb_desc;           /**< configured number of RXDs. */
>> +	uint16_t rx_bufsize;        /**< size of RX buffer. */
>>  } __rte_cache_min_aligned;
>>
>>  /**
>> --
>> 2.7.4
>>
> 
> Will have to wait until 20.11 as it is an ABI change.
> 

I thought about it.
If I'm not mistaken it does  not change size of the structure.

  reply	other threads:[~2020-06-23 15:22 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23  6:48 Chengchang Tang
2020-06-23  9:30 ` Andrew Rybchenko
2020-06-24  3:48   ` Chengchang Tang
2020-06-24  8:52     ` Ferruh Yigit
2020-06-24 18:32       ` Ferruh Yigit
2020-06-25  9:06         ` Andrew Rybchenko
2020-06-23 14:48 ` Stephen Hemminger
2020-06-23 15:22   ` Andrew Rybchenko [this message]
2020-07-22  6:38 ` [dpdk-dev] [RFC v2 0/3] add rx buffer size " Chengchang Tang
2020-07-22  6:38   ` [dpdk-dev] [RFC v2 1/3] ethdev: add a field " Chengchang Tang
2020-07-22  6:38   ` [dpdk-dev] [RFC v2 2/3] net/hns3: add support for query of rx/tx queue info Chengchang Tang
2020-07-22  6:38   ` [dpdk-dev] [RFC v2 3/3] app/testpmd: Add RX buffer size dispaly in queue info querry Chengchang Tang
2020-07-28  6:29   ` [dpdk-dev] [RFC v2 0/3] add rx buffer size for rte_eth_rxq_info Chengchang Tang
2020-07-28  9:30     ` Ferruh Yigit
2020-07-28 11:39       ` Chengchang Tang
2020-07-28 15:27         ` Thomas Monjalon
  -- strict thread matches above, loose matches on Subject: below --
2020-06-18 12:35 [dpdk-dev] [RFC] ethdev: add a field " Chengchang Tang

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