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From: Vlad Zolotarov <vladz@cloudius-systems.com>
To: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
	 "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2 3/3] ixgbe: Unify the rx_pkt_bulk callback initialization
Date: Wed, 11 Mar 2015 17:41:35 +0200	[thread overview]
Message-ID: <5500622F.50200@cloudius-systems.com> (raw)
In-Reply-To: <2601191342CEEE43887BDE71AB977258213F579B@irsmsx105.ger.corp.intel.com>



On 03/11/15 14:45, Ananyev, Konstantin wrote:
>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vlad Zolotarov
>> Sent: Monday, March 09, 2015 4:29 PM
>> To: dev@dpdk.org
>> Subject: [dpdk-dev] [PATCH v2 3/3] ixgbe: Unify the rx_pkt_bulk callback initialization
>>
>>     - Set the callback in a single function that is called from
>>       ixgbe_dev_rx_init() for a primary process and from eth_ixgbe_dev_init()
>>       for a secondary processes. This is instead of multiple, hard to track places.
>>     - Added ixgbe_hw.rx_bulk_alloc_allowed - see ixgbe_hw.rx_vec_allowed description below.
>>     - Added ixgbe_hw.rx_vec_allowed: like with Bulk Allocation, Vector Rx is
>>       enabled or disabled on a per-port level. All queues have to meet the appropriate
>>       preconditions and if any of them doesn't - the feature has to be disabled.
>>       Therefore ixgbe_hw.rx_vec_allowed will be updated during each queues configuration
>>       (rte_eth_rx_queue_setup()) and then used in rte_eth_dev_start() to configure the
>>       appropriate callbacks. The same happens with ixgbe_hw.rx_vec_allowed in a Bulk Allocation
>>       context.
>>     - Bugs fixed:
>>        - Vector scattered packets callback was called regardless the appropriate
>>          preconditions:
>>           - Vector Rx specific preconditions.
>>           - Bulk Allocation preconditions.
>>        - Vector Rx was enabled/disabled according to the last queue setting and not
>>          based on all queues setting (which may be different for each queue).
>>
>> Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>
>> ---
>> New in v2:
>>     - Fixed an broken compilation.
>> ---
>>   lib/librte_pmd_ixgbe/ixgbe/ixgbe_type.h |   2 +
>>   lib/librte_pmd_ixgbe/ixgbe_ethdev.c     |  13 ++-
>>   lib/librte_pmd_ixgbe/ixgbe_rxtx.c       | 183 +++++++++++++++++++++-----------
>>   lib/librte_pmd_ixgbe/ixgbe_rxtx.h       |  22 +++-
>>   4 files changed, 152 insertions(+), 68 deletions(-)
>>
>> diff --git a/lib/librte_pmd_ixgbe/ixgbe/ixgbe_type.h b/lib/librte_pmd_ixgbe/ixgbe/ixgbe_type.h
>> index c67d462..9a66370 100644
>> --- a/lib/librte_pmd_ixgbe/ixgbe/ixgbe_type.h
>> +++ b/lib/librte_pmd_ixgbe/ixgbe/ixgbe_type.h
>> @@ -3657,6 +3657,8 @@ struct ixgbe_hw {
>>   	bool force_full_reset;
>>   	bool allow_unsupported_sfp;
>>   	bool wol_enabled;
>> +	bool rx_bulk_alloc_allowed;
>> +	bool rx_vec_allowed;
>>   };
>>
>>   #define ixgbe_call_func(hw, func, params, error) \
>> diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
>> index 9bdc046..9d3de1a 100644
>> --- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
>> +++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
>> @@ -760,8 +760,8 @@ eth_ixgbe_dev_init(__attribute__((unused)) struct eth_driver *eth_drv,
>>   			                   "Using default TX function.");
>>   		}
>>
>> -		if (eth_dev->data->scattered_rx)
>> -			eth_dev->rx_pkt_burst = ixgbe_recv_scattered_pkts;
>> +		set_rx_function(eth_dev);
>> +
>>   		return 0;
>>   	}
>>   	pci_dev = eth_dev->pci_dev;
>> @@ -772,6 +772,13 @@ eth_ixgbe_dev_init(__attribute__((unused)) struct eth_driver *eth_drv,
>>   	hw->hw_addr = (void *)pci_dev->mem_resource[0].addr;
>>   	hw->allow_unsupported_sfp = 1;
>>
>> +	/*
>> +	 * Initialize to TRUE. If any of Rx queues doesn't meet the bulk
>> +	 * allocation or vector Rx preconditions we will reset it.
>> +	 */
>> +	hw->rx_bulk_alloc_allowed = true;
>> +	hw->rx_vec_allowed = true;
>> +
>>   	/* Initialize the shared code (base driver) */
>>   #ifdef RTE_NIC_BYPASS
>>   	diag = ixgbe_bypass_init_shared_code(hw);
>> @@ -1641,6 +1648,8 @@ ixgbe_dev_stop(struct rte_eth_dev *dev)
>>
>>   	/* Clear stored conf */
>>   	dev->data->scattered_rx = 0;
>> +	hw->rx_bulk_alloc_allowed = false;
>> +	hw->rx_vec_allowed = false;
> If dev_stop() sets it to 'false', who will reset it back to 'true' then?
>
>>   	/* Clear recorded link status */
>>   	memset(&link, 0, sizeof(link));
>> diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
>> index ce9658e..a00f5c9 100644
>> --- a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
>> +++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c
>> @@ -2074,12 +2074,12 @@ check_rx_burst_bulk_alloc_preconditions(__rte_unused struct igb_rx_queue *rxq)
>>
>>   /* Reset dynamic igb_rx_queue fields back to defaults */
>>   static void
>> -ixgbe_reset_rx_queue(struct igb_rx_queue *rxq)
>> +ixgbe_reset_rx_queue(struct ixgbe_hw *hw, struct igb_rx_queue *rxq)
>>   {
>>   	static const union ixgbe_adv_rx_desc zeroed_desc = { .read = {
>>   			.pkt_addr = 0}};
>>   	unsigned i;
>> -	uint16_t len;
>> +	uint16_t len = rxq->nb_rx_desc;
>>
>>   	/*
>>   	 * By default, the Rx queue setup function allocates enough memory for
>> @@ -2091,14 +2091,9 @@ ixgbe_reset_rx_queue(struct igb_rx_queue *rxq)
>>   	 * constraints here to see if we need to zero out memory after the end
>>   	 * of the H/W descriptor ring.
>>   	 */
>> -#ifdef RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC
>> -	if (check_rx_burst_bulk_alloc_preconditions(rxq) == 0)
>> +	if (hw->rx_bulk_alloc_allowed)
>>   		/* zero out extra memory */
>> -		len = (uint16_t)(rxq->nb_rx_desc + RTE_PMD_IXGBE_RX_MAX_BURST);
>> -	else
>> -#endif
>> -		/* do not zero out extra memory */
>> -		len = rxq->nb_rx_desc;
>> +		len += RTE_PMD_IXGBE_RX_MAX_BURST;
>>
>>   	/*
>>   	 * Zero out HW ring memory. Zero out extra memory at the end of
>> @@ -2140,7 +2135,6 @@ ixgbe_dev_rx_queue_setup(struct rte_eth_dev *dev,
>>   	const struct rte_memzone *rz;
>>   	struct igb_rx_queue *rxq;
>>   	struct ixgbe_hw     *hw;
>> -	int use_def_burst_func = 1;
>>   	uint16_t len;
>>
>>   	PMD_INIT_FUNC_TRACE();
>> @@ -2221,15 +2215,27 @@ ixgbe_dev_rx_queue_setup(struct rte_eth_dev *dev,
>>   	rxq->rx_ring = (union ixgbe_adv_rx_desc *) rz->addr;
>>
>>   	/*
>> +	 * Certain constraints must be met in order to use the bulk buffer
>> +	 * allocation Rx burst function. If any of Rx queues doesn't meet them
>> +	 * the feature should be disabled for the whole port.
>> +	 */
>> +	if (check_rx_burst_bulk_alloc_preconditions(rxq)) {
>> +		PMD_INIT_LOG(DEBUG, "queue[%d] doesn't meet Rx Bulk Alloc "
>> +				    "preconditions - canceling the feature for "
>> +				    "the whole port[%d]",
>> +			     rxq->queue_id, rxq->port_id);
>> +		hw->rx_bulk_alloc_allowed = false;
>> +	}
>> +
>> +	/*
>>   	 * Allocate software ring. Allow for space at the end of the
>>   	 * S/W ring to make sure look-ahead logic in bulk alloc Rx burst
>>   	 * function does not access an invalid memory region.
>>   	 */
>> -#ifdef RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC
>> -	len = (uint16_t)(nb_desc + RTE_PMD_IXGBE_RX_MAX_BURST);
>> -#else
>>   	len = nb_desc;
>> -#endif
>> +	if (hw->rx_bulk_alloc_allowed)
>> +		len += RTE_PMD_IXGBE_RX_MAX_BURST;
>> +
> Looking at it: it is probably easier and cleaner to remove all these ifdefs if/else
> And always setup len = nb_desc + RTE_PMD_IXGBE_RX_MAX_BURST;
>
>
>>   	rxq->sw_ring = rte_zmalloc_socket("rxq->sw_ring",
>>   					  sizeof(struct igb_rx_entry) * len,
>>   					  RTE_CACHE_LINE_SIZE, socket_id);
>> @@ -2240,42 +2246,18 @@ ixgbe_dev_rx_queue_setup(struct rte_eth_dev *dev,
>>   	PMD_INIT_LOG(DEBUG, "sw_ring=%p hw_ring=%p dma_addr=0x%"PRIx64,
>>   		     rxq->sw_ring, rxq->rx_ring, rxq->rx_ring_phys_addr);
>>
>> -	/*
>> -	 * Certain constraints must be met in order to use the bulk buffer
>> -	 * allocation Rx burst function.
>> -	 */
>> -	use_def_burst_func = check_rx_burst_bulk_alloc_preconditions(rxq);
>> +	if (!rte_is_power_of_2(nb_desc)) {
>> +		PMD_INIT_LOG(DEBUG, "queue[%d] doesn't meet Vector Rx "
>> +				    "preconditions - canceling the feature for "
>> +				    "the whole port[%d]",
>> +			     rxq->queue_id, rxq->port_id);
>> +		hw->rx_vec_allowed = false;
>> +	} else
>> +		ixgbe_rxq_vec_setup(rxq);
>>
>> -#ifdef RTE_IXGBE_INC_VECTOR
>> -	ixgbe_rxq_vec_setup(rxq);
>> -#endif
>> -	/* Check if pre-conditions are satisfied, and no Scattered Rx */
>> -	if (!use_def_burst_func && !dev->data->scattered_rx) {
>> -#ifdef RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC
>> -		PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are "
>> -			     "satisfied. Rx Burst Bulk Alloc function will be "
>> -			     "used on port=%d, queue=%d.",
>> -			     rxq->port_id, rxq->queue_id);
>> -		dev->rx_pkt_burst = ixgbe_recv_pkts_bulk_alloc;
>> -#ifdef RTE_IXGBE_INC_VECTOR
>> -		if (!ixgbe_rx_vec_condition_check(dev) &&
>> -		    (rte_is_power_of_2(nb_desc))) {
>> -			PMD_INIT_LOG(INFO, "Vector rx enabled, please make "
>> -				     "sure RX burst size no less than 32.");
>> -			dev->rx_pkt_burst = ixgbe_recv_pkts_vec;
>> -		}
>> -#endif
>> -#endif
>> -	} else {
>> -		PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions "
>> -			     "are not satisfied, Scattered Rx is requested, "
>> -			     "or RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC is not "
>> -			     "enabled (port=%d, queue=%d).",
>> -			     rxq->port_id, rxq->queue_id);
>> -	}
>>   	dev->data->rx_queues[queue_idx] = rxq;
>>
>> -	ixgbe_reset_rx_queue(rxq);
>> +	ixgbe_reset_rx_queue(hw, rxq);
>>
>>   	return 0;
>>   }
>> @@ -2329,6 +2311,7 @@ void
>>   ixgbe_dev_clear_queues(struct rte_eth_dev *dev)
>>   {
>>   	unsigned i;
>> +	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
>>
>>   	PMD_INIT_FUNC_TRACE();
>>
>> @@ -2344,7 +2327,7 @@ ixgbe_dev_clear_queues(struct rte_eth_dev *dev)
>>   		struct igb_rx_queue *rxq = dev->data->rx_queues[i];
>>   		if (rxq != NULL) {
>>   			ixgbe_rx_queue_release_mbufs(rxq);
>> -			ixgbe_reset_rx_queue(rxq);
>> +			ixgbe_reset_rx_queue(hw, rxq);
>>   		}
>>   	}
>>   }
>> @@ -3506,6 +3489,58 @@ ixgbe_dev_mq_tx_configure(struct rte_eth_dev *dev)
>>   	return 0;
>>   }
>>
>> +void set_rx_function(struct rte_eth_dev *dev)
>> +{
>> +	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
>> +
>> +	if (ixgbe_rx_vec_condition_check(dev)) {
>> +		PMD_INIT_LOG(DEBUG, "Port[%d] doesn't meet Vector Rx "
>> +				    "preconditions or RTE_IXGBE_INC_VECTOR is "
>> +				    "not enabled",
>> +			     dev->data->port_id);
>> +		hw->rx_vec_allowed = false;
>> +	}
>> +
>> +	/* Check if bulk alloc is allowed and no Scattered Rx */
>> +	if (hw->rx_bulk_alloc_allowed && !dev->data->scattered_rx) {
>> +		PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are "
>> +				    "satisfied. Rx Burst Bulk Alloc function "
>> +				    "will be used on port=%d.",
>> +			     dev->data->port_id);
>> +		dev->rx_pkt_burst = ixgbe_recv_pkts_bulk_alloc;
>> +
>> +		if (hw->rx_vec_allowed) {
>> +			PMD_INIT_LOG(INFO, "Vector rx enabled, please make "
>> +					   "sure RX burst size no less "
>> +					   "than 32.");
>> +			dev->rx_pkt_burst = ixgbe_recv_pkts_vec;
>> +		}
>> +	} else {
>> +		dev->rx_pkt_burst = ixgbe_recv_pkts;
>> +
>> +		PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are not "
>> +				    "satisfied, or Scattered Rx is requested, "
>> +				    "or RTE_LIBRTE_IXGBE_RX_ALLOW_BULK_ALLOC "
>> +				    "is not enabled (port=%d).",
>> +			     dev->data->port_id);
>> +	}
>> +
>> +	if (dev->data->scattered_rx) {
>> +		if (hw->rx_vec_allowed && hw->rx_bulk_alloc_allowed) {
>> +			PMD_INIT_LOG(DEBUG, "Using Vector Scattered Rx "
>> +					    "callback (port=%d).",
>> +				     dev->data->port_id);
>> +			dev->rx_pkt_burst = ixgbe_recv_scattered_pkts_vec;
>> +		} else {
>> +			PMD_INIT_LOG(DEBUG, "Using Regualr (non-vector) "
>> +					    "Scattered Rx callback "
>> +					    "(port=%d).",
>> +				     dev->data->port_id);
>> +			dev->rx_pkt_burst = ixgbe_recv_scattered_pkts;
>> +		}
>> +	}
>> +}
> if scattered_rx != 0 it will setup rx_pkt_burst twice.
> Nothing wrong, but looks a bit clumsy.
> Might be a bit clearer to reorder it a bit:
>
> If (scattered_rx) {
>     ...
> } else if (rx_bulk_alloc_allowed) {
>     ...
> } else {
>     ...
> }
>
>
>> +
>>   /*
>>    * Initializes Receive Unit.
>>    */
>> @@ -3641,23 +3676,17 @@ ixgbe_dev_rx_init(struct rte_eth_dev *dev)
>>   		buf_size = (uint16_t) ((srrctl & IXGBE_SRRCTL_BSIZEPKT_MASK) <<
>>   				       IXGBE_SRRCTL_BSIZEPKT_SHIFT);
>>
>> -		if (dev->data->dev_conf.rxmode.enable_scatter ||
>> -		    /* It adds dual VLAN length for supporting dual VLAN */
>> -		    (dev->data->dev_conf.rxmode.max_rx_pkt_len +
>> -				2 * IXGBE_VLAN_TAG_SIZE) > buf_size){
>> -			if (!dev->data->scattered_rx)
>> -				PMD_INIT_LOG(DEBUG, "forcing scatter mode");
>> +		/* It adds dual VLAN length for supporting dual VLAN */
>> +		if (dev->data->dev_conf.rxmode.max_rx_pkt_len +
>> +					    2 * IXGBE_VLAN_TAG_SIZE > buf_size)
>>   			dev->data->scattered_rx = 1;
>> -#ifdef RTE_IXGBE_INC_VECTOR
>> -			if (rte_is_power_of_2(rxq->nb_rx_desc))
>> -				dev->rx_pkt_burst =
>> -					ixgbe_recv_scattered_pkts_vec;
>> -			else
>> -#endif
>> -				dev->rx_pkt_burst = ixgbe_recv_scattered_pkts;
>> -		}
>>   	}
>>
>> +	if (dev->data->dev_conf.rxmode.enable_scatter)
>> +		dev->data->scattered_rx = 1;
>> +
>> +	set_rx_function(dev);
>> +
>>   	/*
>>   	 * Device configured with multiple RX queues.
>>   	 */
>> @@ -3933,7 +3962,7 @@ ixgbe_dev_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
>>   		rte_delay_us(RTE_IXGBE_WAIT_100_US);
>>
>>   		ixgbe_rx_queue_release_mbufs(rxq);
>> -		ixgbe_reset_rx_queue(rxq);
>> +		ixgbe_reset_rx_queue(hw, rxq);
>>   	} else
>>   		return -1;
>>
>> @@ -4289,3 +4318,31 @@ ixgbevf_dev_rxtx_start(struct rte_eth_dev *dev)
>>
>>   	}
>>   }
>> +
>> +/* Stubs needed for linkage when CONFIG_RTE_IXGBE_INC_VECTOR is set to 'n' */
>> +#ifndef RTE_IXGBE_INC_VECTOR
> Instead of ifndef above, can these function below be defined with _attribute__ ((weak))?
>
>> +int ixgbe_rx_vec_condition_check(
>> +	struct rte_eth_dev __rte_unused *dev)
>> +{
>> +	return -1;
>> +}
>> +
>> +uint16_t
>> +ixgbe_recv_pkts_vec(void __rte_unused *rx_queue,
>> +		    struct rte_mbuf __rte_unused **rx_pkts,
>> +		    uint16_t __rte_unused nb_pkts)
>> +{
>> +	return 0;
>> +}
>> +
>> +uint16_t ixgbe_recv_scattered_pkts_vec(void __rte_unused *rx_queue,
>> +	struct rte_mbuf __rte_unused **rx_pkts, uint16_t __rte_unused nb_pkts)
>> +{
>> +	return 0;
>> +}
>> +
>> +int ixgbe_rxq_vec_setup(struct igb_rx_queue __rte_unused *rxq)
>> +{
>> +	return -1;
>> +}
>> +#endif
>> diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx.h b/lib/librte_pmd_ixgbe/ixgbe_rxtx.h
>> index 329007c..bbe5ff3 100644
>> --- a/lib/librte_pmd_ixgbe/ixgbe_rxtx.h
>> +++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx.h
>> @@ -255,16 +255,32 @@ struct ixgbe_txq_ops {
>>    */
>>   void set_tx_function(struct rte_eth_dev *dev, struct igb_tx_queue *txq);
>>
>> -#ifdef RTE_IXGBE_INC_VECTOR
>> +/**
>> + * Sets the rx_pkt_burst callback in the ixgbe rte_eth_dev instance.
>> + *
>> + * Sets the callback based on the device parameters:
>> + *  - ixgbe_hw.rx_bulk_alloc_allowed
>> + *  - rte_eth_dev_data.scattered_rx
>> + *  - rte_eth_dev_data.lro
>> + *  - conditions checked in ixgbe_rx_vec_condition_check()
>> + *
>> + *  This means that the parameters above have to be configured prior to calling
>> + *  to this function.
>> + *
>> + * @dev rte_eth_dev handle
>> + */
>> +void set_rx_function(struct rte_eth_dev *dev);
>> +
>>   uint16_t ixgbe_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
>>   		uint16_t nb_pkts);
>>   uint16_t ixgbe_recv_scattered_pkts_vec(void *rx_queue,
>>   		struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
>> +int ixgbe_rx_vec_condition_check(struct rte_eth_dev *dev);
>> +int ixgbe_rxq_vec_setup(struct igb_rx_queue *rxq);
>
>> +#ifdef RTE_IXGBE_INC_VECTOR
> Please add an empty line(s) around 'ifdef' -  makes it much easier to read.

Another option could be to just drop the #ifdef all together. I think 
it's gona be ok with gcc. Could it make any problem with icc?

>
>>   uint16_t ixgbe_xmit_pkts_vec(void *tx_queue, struct rte_mbuf **tx_pkts,
>>   		uint16_t nb_pkts);
>>   int ixgbe_txq_vec_setup(struct igb_tx_queue *txq);
>> -int ixgbe_rxq_vec_setup(struct igb_rx_queue *rxq);
>> -int ixgbe_rx_vec_condition_check(struct rte_eth_dev *dev);
>>   #endif
>>
>>   #endif
>> --
>> 2.1.0

  parent reply	other threads:[~2015-03-11 15:41 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-09 16:28 [dpdk-dev] [PATCH v2 0/3]: bug fixes in the ixgbe PF PMD Rx flow Vlad Zolotarov
2015-03-09 16:28 ` [dpdk-dev] [PATCH v2 1/3] ixgbe: Use the rte_le_to_cpu_xx()/rte_cpu_to_le_xx() when reading/setting HW ring descriptor fields Vlad Zolotarov
2015-03-10  9:23   ` Ananyev, Konstantin
2015-03-09 16:28 ` [dpdk-dev] [PATCH v2 2/3] ixgbe: Bug fix: Properly configure Rx CRC stripping for x540 devices Vlad Zolotarov
2015-03-11 11:37   ` Ananyev, Konstantin
2015-03-09 16:28 ` [dpdk-dev] [PATCH v2 3/3] ixgbe: Unify the rx_pkt_bulk callback initialization Vlad Zolotarov
2015-03-11 12:45   ` Ananyev, Konstantin
2015-03-11 15:40     ` Vlad Zolotarov
2015-03-11 17:18       ` Ananyev, Konstantin
2015-03-11 15:41     ` Vlad Zolotarov [this message]
2015-03-11 17:04     ` Vlad Zolotarov
2015-03-11  9:14 ` [dpdk-dev] [PATCH v2 0/3]: bug fixes in the ixgbe PF PMD Rx flow Vlad Zolotarov

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