[dpdk-dev] [PATCHv4 3/9] null: extend number of virtual queues
Tetsuya Mukawa
mukawa at igel.co.jp
Tue Sep 29 12:34:28 CEST 2015
On 2015/09/29 18:46, Kulasek, TomaszX wrote:
>> -----Original Message-----
>> From: Tetsuya Mukawa [mailto:mukawa at igel.co.jp]
>> Sent: Tuesday, September 29, 2015 04:25
>> To: Kulasek, TomaszX; dev at dpdk.org
>> Subject: Re: [dpdk-dev] [PATCHv4 3/9] null: extend number of virtual
>> queues
>>
>> On 2015/07/16 2:26, Tomasz Kulasek wrote:
>>> This patch adds a possibility to configure more than one queue on null
>>> device.
>>>
>>> Signed-off-by: Tomasz Kulasek <tomaszx.kulasek at intel.com>
>>> ---
>>> drivers/net/null/rte_eth_null.c | 12 ++++++------
>>> 1 file changed, 6 insertions(+), 6 deletions(-)
>>>
>>> diff --git a/drivers/net/null/rte_eth_null.c
>>> b/drivers/net/null/rte_eth_null.c index a8b3191..39ffcde 100644
>>> --- a/drivers/net/null/rte_eth_null.c
>>> +++ b/drivers/net/null/rte_eth_null.c
>>> @@ -71,8 +71,8 @@ struct pmd_internals {
>>> unsigned nb_rx_queues;
>>> unsigned nb_tx_queues;
>>>
>>> - struct null_queue rx_null_queues[1];
>>> - struct null_queue tx_null_queues[1];
>>> + struct null_queue rx_null_queues[RTE_MAX_QUEUES_PER_PORT];
>>> + struct null_queue tx_null_queues[RTE_MAX_QUEUES_PER_PORT];
>>> };
>>>
>>>
>>> @@ -213,7 +213,7 @@ eth_rx_queue_setup(struct rte_eth_dev *dev,
>> uint16_t rx_queue_id,
>>> if ((dev == NULL) || (mb_pool == NULL))
>>> return -EINVAL;
>>>
>>> - if (rx_queue_id != 0)
>>> + if (rx_queue_id >= dev->data->nb_rx_queues)
>>> return -ENODEV;
>>>
>>> internals = dev->data->dev_private;
>>> @@ -246,7 +246,7 @@ eth_tx_queue_setup(struct rte_eth_dev *dev,
>> uint16_t tx_queue_id,
>>> if (dev == NULL)
>>> return -EINVAL;
>>>
>>> - if (tx_queue_id != 0)
>>> + if (tx_queue_id >= dev->data->nb_tx_queues)
>>> return -ENODEV;
>>>
>>> internals = dev->data->dev_private;
>>> @@ -279,8 +279,8 @@ eth_dev_info(struct rte_eth_dev *dev,
>>> dev_info->driver_name = drivername;
>>> dev_info->max_mac_addrs = 1;
>>> dev_info->max_rx_pktlen = (uint32_t)-1;
>>> - dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
>>> - dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
>>> + dev_info->max_rx_queues = RTE_DIM(internals->rx_null_queues);
>>> + dev_info->max_tx_queues = RTE_DIM(internals->tx_null_queues);
>>> dev_info->min_rx_bufsize = 0;
>>> dev_info->pci_dev = NULL;
>>> }
>> Hi Thomasz,
>>
>> To do like above, should we change below variables also?
>>
>> static int
>> eth_dev_null_create(const char *name,
>> const unsigned numa_node,
>> unsigned packet_size,
>> unsigned packet_copy)
>> {
>> const unsigned nb_rx_queues = 1;
>> const unsigned nb_tx_queues = 1;
>>
>> (snip)
>>
>> }
>>
>> Tetsuya
> Hi Tetsuya,
>
> The number of requested queues are configured later, through the rte eth_dev_configure API. Here these values mean the default number of queues after null pmd creation.
>
> Tomasz.
>
Hi Tomasz,
I guess we may need to change below variables when a queue is configured.
- internals->nb_rx_queues;
- internals->nb_tx_queues;
Without changing, 'num_stats' in eth_stats_get() might be wrong value.
Tetsuya
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