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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AS8PR08MB7718.eurprd08.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 86186d5b-48ab-42a9-863d-08dbbb83208c X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Sep 2023 15:46:46.3707 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 1KAvk5dTgTTR765Nv+CrevVVzhLm2n3tyUGmCinuGe0eR6NPS9g/rr+cxaWlqbCfGpiMXu2Q0PxJJ7IseBW7dw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS4PR08MB7854 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org > -----Original Message----- > From: Feifei Wang > Sent: Friday, September 22, 2023 10:59 PM > To: Konstantin Ananyev ; Konstantin > Ananyev > Cc: dev@dpdk.org; nd ; Honnappa Nagarahalli > ; Ruifeng Wang > ; Yuying Zhang ; Beilei > Xing ; nd ; nd ; nd > ; nd ; nd ; nd > Subject: RE: [PATCH v11 2/4] net/i40e: implement mbufs recycle mode >=20 >=20 > Hi, Konstantin >=20 > > -----Original Message----- > > From: Feifei Wang > > Sent: Tuesday, September 5, 2023 11:11 AM > > To: Konstantin Ananyev ; Konstantin > > Ananyev > > Cc: dev@dpdk.org; nd ; Honnappa Nagarahalli > > ; Ruifeng Wang > ; > > Yuying Zhang ; Beilei Xing > > ; nd ; nd ; nd > > ; nd ; nd > > Subject: RE: [PATCH v11 2/4] net/i40e: implement mbufs recycle mode > > > > > > > > > -----Original Message----- > > > From: Konstantin Ananyev > > > Sent: Monday, September 4, 2023 6:22 PM > > > To: Feifei Wang ; Konstantin Ananyev > > > > > > Cc: dev@dpdk.org; nd ; Honnappa Nagarahalli > > > ; Ruifeng Wang > > ; > > > Yuying Zhang ; Beilei Xing > > > ; nd ; nd ; nd > > > ; nd > > > Subject: RE: [PATCH v11 2/4] net/i40e: implement mbufs recycle mode > > > > > > > > > > > > > > > > > > > > Define specific function implementation for i40e driv= er. > > > > > > > > > > > Currently, mbufs recycle mode can support 128bit > > > > > > > > > > > vector path and > > > > > > > > > > > avx2 > > > > > > > > > path. > > > > > > > > > > > And can be enabled both in fast free and no fast free= mode. > > > > > > > > > > > > > > > > > > > > > > Suggested-by: Honnappa Nagarahalli > > > > > > > > > > > > > > > > > > > > > > Signed-off-by: Feifei Wang > > > > > > > > > > > Reviewed-by: Ruifeng Wang > > > > > > > > > > > Reviewed-by: Honnappa Nagarahalli > > > > > > > > > > > > > > > > > > --- > > > > > > > > > > > drivers/net/i40e/i40e_ethdev.c | 1 = + > > > > > > > > > > > drivers/net/i40e/i40e_ethdev.h | 2 = + > > > > > > > > > > > .../net/i40e/i40e_recycle_mbufs_vec_common.c | 147 > > > > > > > > > > > ++++++++++++++++++ > > > > > > > > > > > drivers/net/i40e/i40e_rxtx.c | 32 = ++++ > > > > > > > > > > > drivers/net/i40e/i40e_rxtx.h | 4 = + > > > > > > > > > > > drivers/net/i40e/meson.build | 1 = + > > > > > > > > > > > 6 files changed, 187 insertions(+) create mode > > > > > > > > > > > 100644 > > > > > > > > > > > drivers/net/i40e/i40e_recycle_mbufs_vec_common.c > > > > > > > > > > > > > > > > > > > > > > diff --git a/drivers/net/i40e/i40e_ethdev.c > > > > > > > > > > > b/drivers/net/i40e/i40e_ethdev.c index > > > > > > > > > > > 8271bbb394..50ba9aac94 > > > > > > > > > > > 100644 > > > > > > > > > > > --- a/drivers/net/i40e/i40e_ethdev.c > > > > > > > > > > > +++ b/drivers/net/i40e/i40e_ethdev.c > > > > > > > > > > > @@ -496,6 +496,7 @@ static const struct eth_dev_ops > > > > > > > > > > > i40e_eth_dev_ops > > > > > > > > > =3D { > > > > > > > > > > > .flow_ops_get =3D i40e_dev_flow_ops= _get, > > > > > > > > > > > .rxq_info_get =3D i40e_rxq_info_get= , > > > > > > > > > > > .txq_info_get =3D i40e_txq_info_get= , > > > > > > > > > > > + .recycle_rxq_info_get =3D > > i40e_recycle_rxq_info_get, > > > > > > > > > > > .rx_burst_mode_get =3D > > i40e_rx_burst_mode_get, > > > > > > > > > > > .tx_burst_mode_get =3D > > i40e_tx_burst_mode_get, > > > > > > > > > > > .timesync_enable =3D i40e_timesync_ena= ble, > > > > > > > > > > > diff --git a/drivers/net/i40e/i40e_ethdev.h > > > > > > > > > > > b/drivers/net/i40e/i40e_ethdev.h index > > > > > > > > > > > 6f65d5e0ac..af758798e1 > > > > > > > > > > > 100644 > > > > > > > > > > > --- a/drivers/net/i40e/i40e_ethdev.h > > > > > > > > > > > +++ b/drivers/net/i40e/i40e_ethdev.h > > > > > > > > > > > @@ -1355,6 +1355,8 @@ void i40e_rxq_info_get(struct > > > > > > > > > > > rte_eth_dev *dev, uint16_t queue_id, > > > > > > > > > > > struct rte_eth_rxq_info *qinfo); void > > > > > > > > > > > i40e_txq_info_get(struct rte_eth_dev *dev, uint16_t > queue_id, > > > > > > > > > > > struct rte_eth_txq_info *qinfo); > > > > > > > > > > > +void i40e_recycle_rxq_info_get(struct rte_eth_dev > > > > > > > > > > > +*dev, uint16_t > > > > > > > > > queue_id, > > > > > > > > > > > + struct rte_eth_recycle_rxq_info > > > > > > > > > > > +*recycle_rxq_info); > > > > > > > > > > > int i40e_rx_burst_mode_get(struct rte_eth_dev *dev, > > > > > > > > > > > uint16_t > > > > > > > queue_id, > > > > > > > > > > > struct rte_eth_burst_mode *mode); > > int > > > > > > > > > > > i40e_tx_burst_mode_get(struct rte_eth_dev *dev, > > > > > > > > > > > uint16_t queue_id, diff -- git > > > > > > > > > > > a/drivers/net/i40e/i40e_recycle_mbufs_vec_common.c > > > > > > > > > > > b/drivers/net/i40e/i40e_recycle_mbufs_vec_common.c > > > > > > > > > > > new file mode 100644 index 0000000000..5663ecccde > > > > > > > > > > > --- /dev/null > > > > > > > > > > > +++ b/drivers/net/i40e/i40e_recycle_mbufs_vec_common > > > > > > > > > > > +++ .c > > > > > > > > > > > @@ -0,0 +1,147 @@ > > > > > > > > > > > +/* SPDX-License-Identifier: BSD-3-Clause > > > > > > > > > > > + * Copyright (c) 2023 Arm Limited. > > > > > > > > > > > + */ > > > > > > > > > > > + > > > > > > > > > > > +#include #include > > > > > > > > > > > + > > > > > > > > > > > +#include "base/i40e_prototype.h" > > > > > > > > > > > +#include "base/i40e_type.h" > > > > > > > > > > > +#include "i40e_ethdev.h" > > > > > > > > > > > +#include "i40e_rxtx.h" > > > > > > > > > > > + > > > > > > > > > > > +#pragma GCC diagnostic ignored "-Wcast-qual" > > > > > > > > > > > + > > > > > > > > > > > +void > > > > > > > > > > > +i40e_recycle_rx_descriptors_refill_vec(void > > > > > > > > > > > +*rx_queue, uint16_t > > > > > > > > > > > +nb_mbufs) { > > > > > > > > > > > + struct i40e_rx_queue *rxq =3D rx_queue; > > > > > > > > > > > + struct i40e_rx_entry *rxep; > > > > > > > > > > > + volatile union i40e_rx_desc *rxdp; > > > > > > > > > > > + uint16_t rx_id; > > > > > > > > > > > + uint64_t paddr; > > > > > > > > > > > + uint64_t dma_addr; > > > > > > > > > > > + uint16_t i; > > > > > > > > > > > + > > > > > > > > > > > + rxdp =3D rxq->rx_ring + rxq->rxrearm_start; > > > > > > > > > > > + rxep =3D &rxq->sw_ring[rxq->rxrearm_start]; > > > > > > > > > > > + > > > > > > > > > > > + for (i =3D 0; i < nb_mbufs; i++) { > > > > > > > > > > > + /* Initialize rxdp descs. */ > > > > > > > > > > > + paddr =3D (rxep[i].mbuf)->buf_iova + > > > > > > > > > > > RTE_PKTMBUF_HEADROOM; > > > > > > > > > > > + dma_addr =3D rte_cpu_to_le_64(paddr); > > > > > > > > > > > + /* flush desc with pa dma_addr */ > > > > > > > > > > > + rxdp[i].read.hdr_addr =3D 0; > > > > > > > > > > > + rxdp[i].read.pkt_addr =3D dma_addr; > > > > > > > > > > > + } > > > > > > > > > > > + > > > > > > > > > > > + /* Update the descriptor initializer index */ > > > > > > > > > > > + rxq->rxrearm_start +=3D nb_mbufs; > > > > > > > > > > > + rx_id =3D rxq->rxrearm_start - 1; > > > > > > > > > > > + > > > > > > > > > > > + if (unlikely(rxq->rxrearm_start >=3D rxq->nb_rx_des= c)) { > > > > > > > > > > > + rxq->rxrearm_start =3D 0; > > > > > > > > > > > + rx_id =3D rxq->nb_rx_desc - 1; > > > > > > > > > > > + } > > > > > > > > > > > + > > > > > > > > > > > + rxq->rxrearm_nb -=3D nb_mbufs; > > > > > > > > > > > + > > > > > > > > > > > + rte_io_wmb(); > > > > > > > > > > > + /* Update the tail pointer on the NIC */ > > > > > > > > > > > + I40E_PCI_REG_WRITE_RELAXED(rxq->qrx_tail, rx_id); > > > > > > > > > > > +} > > > > > > > > > > > + > > > > > > > > > > > +uint16_t > > > > > > > > > > > +i40e_recycle_tx_mbufs_reuse_vec(void *tx_queue, > > > > > > > > > > > + struct rte_eth_recycle_rxq_info *recycle_rxq_info) = { > > > > > > > > > > > + struct i40e_tx_queue *txq =3D tx_queue; > > > > > > > > > > > + struct i40e_tx_entry *txep; > > > > > > > > > > > + struct rte_mbuf **rxep; > > > > > > > > > > > + int i, n; > > > > > > > > > > > + uint16_t nb_recycle_mbufs; > > > > > > > > > > > + uint16_t avail =3D 0; > > > > > > > > > > > + uint16_t mbuf_ring_size =3D recycle_rxq_info- > > >mbuf_ring_size; > > > > > > > > > > > + uint16_t mask =3D recycle_rxq_info->mbuf_ring_size = - 1; > > > > > > > > > > > + uint16_t refill_requirement =3D recycle_rxq_info- > > > > > > > >refill_requirement; > > > > > > > > > > > + uint16_t refill_head =3D *recycle_rxq_info->refill_= head; > > > > > > > > > > > + uint16_t receive_tail =3D > > > > > > > > > > > +*recycle_rxq_info->receive_tail; > > > > > > > > > > > + > > > > > > > > > > > + /* Get available recycling Rx buffers. */ > > > > > > > > > > > + avail =3D (mbuf_ring_size - (refill_head - > > > > > > > > > > > +receive_tail)) & mask; > > > > > > > > > > > + > > > > > > > > > > > + /* Check Tx free thresh and Rx available space. */ > > > > > > > > > > > + if (txq->nb_tx_free > txq->tx_free_thresh || avail > > > > > > > > > > > +<=3D > > > > > > > > > > > +txq- > > > > > > > >tx_rs_thresh) > > > > > > > > > > > + return 0; > > > > > > > > > > > + > > > > > > > > > > > + /* check DD bits on threshold descriptor */ > > > > > > > > > > > + if > > > > > > > > > > > +((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz > > > > > > > > > > > +& > > > > > > > > > > > + > > > > > > > > > > > rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=3D > > > > > > > > > > > + > > > > > > > > > > > rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)) > > > > > > > > > > > + return 0; > > > > > > > > > > > + > > > > > > > > > > > + n =3D txq->tx_rs_thresh; > > > > > > > > > > > + nb_recycle_mbufs =3D n; > > > > > > > > > > > + > > > > > > > > > > > + /* Mbufs recycle mode can only support no ring > > > > > > > > > > > +buffer > > > > > > > wrapping > > > > > > > > > > > around. > > > > > > > > > > > + * Two case for this: > > > > > > > > > > > + * > > > > > > > > > > > + * case 1: The refill head of Rx buffer ring needs > > > > > > > > > > > +to be aligned > > > > > > > with > > > > > > > > > > > + * mbuf ring size. In this case, the number of Tx > > freeing buffers > > > > > > > > > > > + * should be equal to refill_requirement. > > > > > > > > > > > + * > > > > > > > > > > > + * case 2: The refill head of Rx ring buffer does > > > > > > > > > > > +not need to be > > > > > > > aligned > > > > > > > > > > > + * with mbuf ring size. In this case, the update > > > > > > > > > > > +of refill head > > > > > > > can not > > > > > > > > > > > + * exceed the Rx mbuf ring size. > > > > > > > > > > > + */ > > > > > > > > > > > + if (refill_requirement !=3D n || > > > > > > > > > > > + (!refill_requirement && (refill_head + n > > > > > > > > mbuf_ring_size))) > > > > > > > > > > > + return 0; > > > > > > > > > > > + > > > > > > > > > > > + /* First buffer to free from S/W ring is at index > > > > > > > > > > > + * tx_next_dd - (tx_rs_thresh-1). > > > > > > > > > > > + */ > > > > > > > > > > > + txep =3D &txq->sw_ring[txq->tx_next_dd - (n - 1)]; > > > > > > > > > > > + rxep =3D recycle_rxq_info->mbuf_ring; > > > > > > > > > > > + rxep +=3D refill_head; > > > > > > > > > > > + > > > > > > > > > > > + if (txq->offloads & > > RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE) { > > > > > > > > > > > + /* Avoid txq contains buffers from unexpected > > > > > > > mempool. */ > > > > > > > > > > > + if (unlikely(recycle_rxq_info->mp > > > > > > > > > > > + !=3D txep[0].mbuf- > > >pool)) > > > > > > > > > > > + return 0; > > > > > > > > > > > + > > > > > > > > > > > + /* Directly put mbufs from Tx to Rx. */ > > > > > > > > > > > + for (i =3D 0; i < n; i++) > > > > > > > > > > > + rxep[i] =3D txep[i].mbuf; > > > > > > > > > > > + } else { > > > > > > > > > > > + for (i =3D 0; i < n; i++) { > > > > > > > > > > > + rxep[i] =3D > > > > > > > rte_pktmbuf_prefree_seg(txep[i].mbuf); > > > > > > > > > > > + > > > > > > > > > > > + /* If Tx buffers are not the last > > reference or > > > > > > > from > > > > > > > > > > > + * unexpected mempool, previous > > copied > > > > > > > buffers are > > > > > > > > > > > + * considered as invalid. > > > > > > > > > > > + */ > > > > > > > > > > > + if (unlikely((rxep[i] =3D=3D NULL && > > > > > > > refill_requirement) || > > > > > > > > > > [Konstantin] > > > > > > > > > > Could you pls remind me why it is ok to have > > > > > > > > > > rxep[i]=3D=3DNULL when refill_requirement is not set? > > > > > > > > > > > > > > > > > > > > If reill_requirement is not zero, it means each tx > > > > > > > > > > freed buffer must be valid and can be put into Rx sw_ri= ng. > > > > > > > > > > Then the refill head of Rx buffer ring can be aligned > > > > > > > > > > with mbuf ring size. Briefly speaking the number > > > > > > > > > of Tx valid freed buffer must be equal to Rx refill_requi= rement. > > > > > > > > > For example, i40e driver. > > > > > > > > > > > > > > > > > > > > If reill_requirement is zero, it means that the refill > > > > > > > > > > head of Rx buffer ring does not need to be aligned > > > > > > > > > > with mbuf ring size, thus if Tx have n valid freed > > > > > > > > > > buffers, we just need to put these n buffers into Rx > > > > > > > > > > sw- > > > > > > > > > ring, and not to be equal to the Rx setting rearm number. > > > > > > > > > For example, mlx5 driver. > > > > > > > > > > > > > > > > > > > > In conclusion, above difference is due to pmd drivers > > > > > > > > > > have different > > > > > > > > > strategies to update their Rx rearm(refill) head. > > > > > > > > > > For i40e driver, if rearm_head exceed 1024, it will be > > > > > > > > > > set as > > > > > > > > > > 0 due to the > > > > > > > > > number of each rearm is a fixed value by default. > > > > > > > > > > For mlx5 driver. Its rearm_head can exceed 1024, and > > > > > > > > > > use mask to achieve > > > > > > > > > real index. Thus its rearm number can be a different valu= e. > > > > > > > > > > > > > > > > > > Ok, but if rte_pktmbuf_prefree_seg(txep[i].mbuf), it > > > > > > > > > means that this mbuf is not free yet and can't be reused. > > > > > > > > > Shouldn't we then set nb_recycle_mbufs =3D 0 in that case= too? > > > > > > > > > Or probably would be enough to skip that mbuf? > > > > > > > > > Might be something like that: > > > > > > > > > > > > > > > > > > for (i =3D 0, j =3D 0; i < n; i++) { > > > > > > > > > > > > > > > > > > rxep[j] =3D rte_pktmbuf_prefree_seg(txep[i].mbuf); > > > > > > > > > if (rxep[j] =3D=3D NULL || recycle_rxq_info->mp !=3D > > > > > > > > > rxep[j].mbuf- > > > >pool)) { > > > > > > > > > if (refill_requirement) { > > > > > > > > > nb_recycle_mbufs =3D 0; > > > > > > > > > break; > > > > > > > > > } > > > > > > > > > } else > > > > > > > > > j++; > > > > > > > > > } > > > > > > > > > > > > > > > > > > /* now j contains actual number of recycled mbufs */ > > > > > > > > > > > > > > > > > > ? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > + recycle_rxq_info- > > >mp !=3D > > > > > > > txep[i].mbuf- > > > > > > > > > > > >pool)) > > > > > > > > > > > + nb_recycle_mbufs =3D 0; > > > > > > > > > > > + } > > > > > > > > > > > + /* If Tx buffers are not the last reference or > > > > > > > > > > > + * from unexpected mempool, all recycled > > buffers > > > > > > > > > > > + * are put into mempool. > > > > > > > > > > > + */ > > > > > > > > > > > + if (nb_recycle_mbufs =3D=3D 0) > > > > > > > > > > > + for (i =3D 0; i < n; i++) { > > > > > > > > > > > + if (rxep[i] !=3D NULL) > > > > > > > > > > > + > > rte_mempool_put(rxep[i]- > > > > > > > >pool, > > > > > > > > > > > rxep[i]); > > > > > > > > > > > + } > > > > > > > > > > > + } > > > > > > > > > > > + > > > > > > > > [Konstantin] After another thought, it might be easier and > > > > > > > > cleaner > > > just to: > > > > > > > > if (rxep[j] =3D=3D NULL || recycle_rxq_info->mp !=3D rxep[j= ].mbuf->pool) > > > > > > > > nb_recycle_mbufs =3D 0; > > > > > > > > > > > > > > > > Anyway, from my understanding - if > > > > > > > > rte_pktmbuf_prefree_seg(mbuf) returns NULL, then we can't > > > > > > > > recycle > > > that mbuf. > > > > > > > > > > > > > > > > [Feifei] Agree with that 'rte_pktmbuf_prefree_seg(mbuf) > > > > > > > > returns NULL, then > > > > > > > we can't recycle that mbuf'. > > > > > > > > > > > > > > > > Firstly, we should know for i40e driver, the number of > > > > > > > > free mbufs is fixed, it > > > > > > > must equal to 'tx_rs_thresh' > > > > > > > > This means if we start to free Tx mbufs, it cannot be > > > > > > > > interrupted until the > > > > > > > given amount of mbufs are freed. > > > > > > > > In the meanwhile, doing prefree operation for a Tx mbuf > > > > > > > > can be looked at this mbuf is freed from this TX sw-ring > > > > > > > > if the API returns NULL. This is due > > > > > > > to that call 'prefree_seg' function means update the mbuf ref= cnt. > > > > > > > > > > > > > > > > So let's come back our recycle mbuf case. > > > > > > > > Here we consider that the case if we have 32 mbufs need to > > > > > > > > be freed, and > > > > > > > we firstly do the pre-free. > > > > > > > > And then first 8 mbufs is good and return value is not none= . > > > > > > > > But the 9th > > > > > > > mbuf is bad, its refcnt is more than 1. > > > > > > > > So we just update its refcnt and cannot put it into Rx sw-r= ing. > > > > > > > > For Tx sw-ring, > > > > > > > this mbuf has been freed. > > > > > > > > Then we should continue to do pre-free operation for the > > > > > > > > next Tx mbufs to ensure the given amount of mbufs are freed= . > > > > > > > > > > > > > > > > Do a conclusion for this, this is because if we start to > > > > > > > > do pre-free operation, the Tx mbuf refcnt value maybe > > > > > > > > changed, so we cannot stop or > > > > > > > break until finish all the pre-free operation. > > > > > > > > > > > > > > > > Finally, in the case that Rx refill_request is not zero, > > > > > > > > but the valid mbuf amount is less than this value, we must > > > > > > > > put back this Tx mbufs into > > > > > > > mempool. > > > > > > > > > > > > > > > > Above is the reason why I do not directly jump out of the > > > > > > > > loop if some mbuf > > > > > > > return value is NULL. > > > > > > > > > > > > > > Yep, I already realized that it is a bit more complicated > > > > > > > and we need to continue with prefree() for all packets even > > > > > > > when we get NULL in > > > > > the middle. > > > > > > > Anyway the code has to be changed, right? > > > > > > > > > > > > > Sorry, I think for the code, it is unnecessary to be changed. > > > > > > For no fast free path, currently: > > > > > > 1. We check whether each mbuf is Ok and call pre_free functio= n > > > > > > -------------------------------------------------------------- > > > > > > -- > > > > > > -- > > > > > > ---- > > > > > > -------------------------------------------------------------- > > > > > > 2.1 For the mbuf return value is not NULL, it is put into Rx sw= -ring. > > > > > > 2.2 For the mbuf return value is zero and refill-request, it > > > > > > will also firstly put into Rx sw-ring, and we set nb_recycle = =3D > > > > > > 0 > > > > > > -------------------------------------------------------------- > > > > > > -- > > > > > > -- > > > > > > ---- > > > > > > -------------------------------------------------------------- > > > > > > 3.1 We check nb_recycle, if it is not 0, we will continue to > > > > > > rearm Rx descs > > > > > and update its index by call descs_refill function. > > > > > > 3.2 if nb_recycle is 0, we will put valid recycle mbufs back > > > > > > into mempool as general path. This is necessary, because we > > > > > > need to ensure the freed Tx number is fixed.(Some buffers > > > > > > return is null can be seen as freed, others need to be put > > > > > > into mempool) > > > > > > > > > > > > Or maybe I ignore something? > > > > > > > > > > > > > > > I am talking about the case when both refill_requirement and > > > > > mbuf return values iare zero: > > > > > if (unlikely((rxep[i] =3D=3D NULL && refill_requirement) || = // ??? > rxep[i] > > =3D=3D > > > 0 > > > > > AND refill_requirement =3D=3D 0 ??? > > > > > recycle_rxq_info->mp !=3D txep[i].mbuf->pool)) > > > > > nb_recycle_mbufs =3D 0; > > > > > > > > > > As I can read the code you treat such situation as valid, while > > > > > I think we should reset nb_recycle_mbufs to zero when rxep[i] =3D= =3D > > > > > NULL, no matter what value refill_requirement is. > > > > > > > > So this means for maybe MLX5 driver, its refill_request =3D 0. And > > > > if some mbufs return value is zero, the other mbufs can not be > > > > recycled into Rx sw-ring? Because nb_recycle=3D0, and they need to > > > > be put into > > > mempool. > > > > > > > > I think for such as MLX5 driver, we can allow recycle some valid > > > > mbufs into > > > Rx ring. > > > > Because no constraint for its refill number. Is my suggestion reaso= nable? > > > > > > I suppose yes: if refill_request is zero we potentially can skip 'bad= ' > > > mbufs and continue with recycling for remaining ones. > > > It would probably require more changes in current code, but sounds > > > ok to me in general. > > That's Ok. Thanks for your careful reviewing. >=20 > I'm very sorry not to receive your e-mail and until now I realize we need= to do > some code change for i40e driver. Also thanks ferruh to kindly remind thi= s. >=20 > Agree with you we need some operation for the case that (refill_requireme= nt > =3D=3D 0 && rxep[i] =3D=3D 0). > Thus maybe we can do a change as follows: >=20 > for (i =3D 0; i < n; i++) { > rxep[0] =3D rte_pktmbuf_prefree_seg(txep[i].mbuf); > if (unlikely((rxep[0] =3D=3D NULL && refill_requirement) || > recycle_rxq_info->mp !=3D txep[i].mbuf->pool)) > nb_recycle_mbufs =3D 0; > if (likely(rxep[0])) > rxep++; > } >=20 > Is above change is Ok? >=20 Just do a change for the above code: ---------------------------------------------------------------------------= -------------------------- int j =3D 0; ...... for (i =3D 0; i < n; i++) { rxep[j] =3D rte_pktmbuf_prefree_seg(txep[i].mbuf); if (unlikely(rxep[j] =3D=3D NULL && !refill_requirement)) continue; if (unlikely((rxep[j] =3D=3D NULL && refill_requirement) || recycle_rxq_info->mp !=3D txep[i].mbuf->pool)) nb_recycle_mbufs =3D 0; j++; } if (nb_recycle_mbufs =3D=3D 0) for (i =3D 0; i < j; i++) { if (rxep[i] !=3D NULL) rte_mempool_put(rxep[i]->pool, rxep[i]); } ---------------------------------------------------------------------------= ------------------------------ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > + /* Update counters for Tx. */ > > > > > > > > > > > + txq->nb_tx_free =3D (uint16_t)(txq->nb_tx_free + > > > > > > > > > > > +txq- > > > > > > > >tx_rs_thresh); > > > > > > > > > > > + txq->tx_next_dd =3D (uint16_t)(txq->tx_next_dd + > > > > > > > > > > > +txq- > > > > > > > >tx_rs_thresh); > > > > > > > > > > > + if (txq->tx_next_dd >=3D txq->nb_tx_desc) > > > > > > > > > > > + txq->tx_next_dd =3D (uint16_t)(txq- > > >tx_rs_thresh - > > > > > > > > > > > +1); > > > > > > > > > > > + > > > > > > > > > > > + return nb_recycle_mbufs; } > > > > > > > > > > > diff --git a/drivers/net/i40e/i40e_rxtx.c > > > > > > > > > > > b/drivers/net/i40e/i40e_rxtx.c index > > > > > > > > > > > b4f65b58fa..a9c9eb331c > > > > > > > > > > > 100644 > > > > > > > > > > > --- a/drivers/net/i40e/i40e_rxtx.c > > > > > > > > > > > +++ b/drivers/net/i40e/i40e_rxtx.c > > > > > > > > > > > @@ -3199,6 +3199,30 @@ i40e_txq_info_get(struct > > > > > > > > > > > rte_eth_dev *dev, uint16_t queue_id, > > > > > > > > > > > qinfo->conf.offloads =3D txq->offloads; } > > > > > > > > > > > > > > > > > > > > > > +void > > > > > > > > > > > +i40e_recycle_rxq_info_get(struct rte_eth_dev *dev, > > > > > > > > > > > +uint16_t > > > > > > > queue_id, > > > > > > > > > > > + struct rte_eth_recycle_rxq_info *recycle_rxq_info) = { > > > > > > > > > > > + struct i40e_rx_queue *rxq; > > > > > > > > > > > + struct i40e_adapter *ad =3D > > > > > > > > > > > + I40E_DEV_PRIVATE_TO_ADAPTER(dev->data- > > > > > > > >dev_private); > > > > > > > > > > > + > > > > > > > > > > > + rxq =3D dev->data->rx_queues[queue_id]; > > > > > > > > > > > + > > > > > > > > > > > + recycle_rxq_info->mbuf_ring =3D (void *)rxq->sw_rin= g; > > > > > > > > > > > + recycle_rxq_info->mp =3D rxq->mp; > > > > > > > > > > > + recycle_rxq_info->mbuf_ring_size =3D rxq->nb_rx_des= c; > > > > > > > > > > > + recycle_rxq_info->receive_tail =3D &rxq->rx_tail; > > > > > > > > > > > + > > > > > > > > > > > + if (ad->rx_vec_allowed) { > > > > > > > > > > > + recycle_rxq_info->refill_requirement =3D > > > > > > > > > > > RTE_I40E_RXQ_REARM_THRESH; > > > > > > > > > > > + recycle_rxq_info->refill_head =3D &rxq- > > >rxrearm_start; > > > > > > > > > > > + } else { > > > > > > > > > > > + recycle_rxq_info->refill_requirement =3D rxq- > > > > > > > >rx_free_thresh; > > > > > > > > > > > + recycle_rxq_info->refill_head =3D &rxq- > > >rx_free_trigger; > > > > > > > > > > > + } > > > > > > > > > > > +} > > > > > > > > > > > + > > > > > > > > > > > #ifdef RTE_ARCH_X86 static inline bool > > > > > > > > > > > get_avx_supported(bool request_avx512) @@ -3293,6 > > > > > > > > > > > +3317,8 > > > > > @@ > > > > > > > > > > > i40e_set_rx_function(struct rte_eth_dev *dev) > > > > > > > > > > > dev->rx_pkt_burst =3D ad- > > > > > >rx_use_avx2 ? > > > > > > > > > > > > > > > > i40e_recv_scattered_pkts_vec_avx2 : > > > > > > > > > > > > > i40e_recv_scattered_pkts_vec; > > > > > > > > > > > + dev- > > >recycle_rx_descriptors_refill =3D > > > > > > > > > > > + > > > > > > > i40e_recycle_rx_descriptors_refill_vec; > > > > > > > > > > > } > > > > > > > > > > > } else { > > > > > > > > > > > if (ad->rx_use_avx512) { @@ -3311,9 > > +3337,12 > > > @@ > > > > > > > > > > > i40e_set_rx_function(struct rte_eth_dev > > > > > > > *dev) > > > > > > > > > > > dev->rx_pkt_burst =3D ad- > > > > > >rx_use_avx2 ? > > > > > > > > > > > > > i40e_recv_pkts_vec_avx2 : > > > > > > > > > > > i40e_recv_pkts_vec; > > > > > > > > > > > + dev- > > >recycle_rx_descriptors_refill =3D > > > > > > > > > > > + > > > > > > > i40e_recycle_rx_descriptors_refill_vec; > > > > > > > > > > > } > > > > > > > > > > > } > > > > > > > > > > > #else /* RTE_ARCH_X86 */ > > > > > > > > > > > + dev->recycle_rx_descriptors_refill =3D > > > > > > > > > > > +i40e_recycle_rx_descriptors_refill_vec; > > > > > > > > > > > if (dev->data->scattered_rx) { > > > > > > > > > > > PMD_INIT_LOG(DEBUG, > > > > > > > > > > > "Using Vector Scattered Rx > > > > > (port %d).", @@ > > > > > > > > > > > -3481,15 +3510,18 @@ i40e_set_tx_function(struct > > > > > > > > > > > rte_eth_dev > > > > > *dev) > > > > > > > > > > > dev->tx_pkt_burst =3D ad- > > > > > >tx_use_avx2 ? > > > > > > > > > > > > > > > > i40e_xmit_pkts_vec_avx2 : > > > > > > > > > > > > > > > > i40e_xmit_pkts_vec; > > > > > > > > > > > + dev->recycle_tx_mbufs_reuse > > =3D > > > > > > > > > > > i40e_recycle_tx_mbufs_reuse_vec; > > > > > > > > > > > } > > > > > > > > > > > #else /* RTE_ARCH_X86 */ > > > > > > > > > > > PMD_INIT_LOG(DEBUG, "Using Vector > > Tx > > > > > (port %d).", > > > > > > > > > > > dev->data->port_id); > > > > > > > > > > > dev->tx_pkt_burst =3D > > i40e_xmit_pkts_vec; > > > > > > > > > > > + dev->recycle_tx_mbufs_reuse =3D > > > > > > > > > > > i40e_recycle_tx_mbufs_reuse_vec; #endif /* > > > > > > > > > > > RTE_ARCH_X86 > > */ > > > > > > > > > > > } else { > > > > > > > > > > > PMD_INIT_LOG(DEBUG, "Simple tx > > finally be > > > > > used."); > > > > > > > > > > > dev->tx_pkt_burst =3D > > i40e_xmit_pkts_simple; > > > > > > > > > > > + dev->recycle_tx_mbufs_reuse =3D > > > > > > > > > > > i40e_recycle_tx_mbufs_reuse_vec; > > > > > > > > > > > } > > > > > > > > > > > dev->tx_pkt_prepare =3D > > i40e_simple_prep_pkts; > > > > > > > > > > > } else { > > > > > > > > > > > diff --git a/drivers/net/i40e/i40e_rxtx.h > > > > > > > > > > > b/drivers/net/i40e/i40e_rxtx.h index > > > > > > > > > > > a8686224e5..b191f23e1f > > > > > > > > > > > 100644 > > > > > > > > > > > --- a/drivers/net/i40e/i40e_rxtx.h > > > > > > > > > > > +++ b/drivers/net/i40e/i40e_rxtx.h > > > > > > > > > > > @@ -236,6 +236,10 @@ uint32_t > > > > > > > > > > > i40e_dev_rx_queue_count(void *rx_queue); int > > > > > > > > > > > i40e_dev_rx_descriptor_status(void *rx_queue, > > > > > > > > > > > uint16_t offset); int > > > > > > > > > > > i40e_dev_tx_descriptor_status(void > > > > > > > > > > > *tx_queue, uint16_t offset); > > > > > > > > > > > > > > > > > > > > > > +uint16_t i40e_recycle_tx_mbufs_reuse_vec(void > *tx_queue, > > > > > > > > > > > + struct rte_eth_recycle_rxq_info > > *recycle_rxq_info); > > > > > > > void > > > > > > > > > > > +i40e_recycle_rx_descriptors_refill_vec(void > > > > > > > > > > > +*rx_queue, uint16_t nb_mbufs); > > > > > > > > > > > + > > > > > > > > > > > uint16_t i40e_recv_pkts_vec(void *rx_queue, struct > > > > > > > > > > > rte_mbuf > > > > > > > **rx_pkts, > > > > > > > > > > > uint16_t nb_pkts); uint16_t > > > > > > > > > > > i40e_recv_scattered_pkts_vec(void *rx_queue, diff > > > > > > > > > > > --git a/drivers/net/i40e/meson.build > > > > > > > > > > > b/drivers/net/i40e/meson.build index > > > > > > > > > > > 8e53b87a65..3b1a233c84 100644 > > > > > > > > > > > --- a/drivers/net/i40e/meson.build > > > > > > > > > > > +++ b/drivers/net/i40e/meson.build > > > > > > > > > > > @@ -34,6 +34,7 @@ sources =3D files( > > > > > > > > > > > 'i40e_tm.c', > > > > > > > > > > > 'i40e_hash.c', > > > > > > > > > > > 'i40e_vf_representor.c', > > > > > > > > > > > + 'i40e_recycle_mbufs_vec_common.c', > > > > > > > > > > > 'rte_pmd_i40e.c', > > > > > > > > > > > ) > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > 2.25.1