Multi-packet RQ

Multi-Packet RQ is a receive queue where multiple packets are written to the same WR data buffer. The feature improves performance and reduces memory footprint.

Multi-Packet RQ Experimental vs. RDMA-Core Verbs and Capabilities

Experimental		RDMA-Core
Verbs
`ibv_exp_query_device`	`supported_qps`: `IBV_EXP_MP_RQ_SUP_TYPE_SRQ_TM` `IBV_EXP_MP_RQ_SUP_TYPE_WQ_RQ`	Not supported by RDMA-Core.
`ibv_exp_query_device`	`allowed_shifts`: `IBV_EXP_MP_RQ_NO_SHIFT` `IBV_EXP_MP_RQ_2BYTES_SHIFT`	Not supported by RDMA-Core.
`ibv_exp_query_device` `mp_rq_caps`	`min_single_wqe_log_num_of_strides`	`mlx5dv_query_device` `mlx5dv_striding_rq_caps`	`min_single_wqe_log_num_of_strides`
	`max_single_wqe_log_num_of_strides`		`max_single_wqe_log_num_of_strides`
	`min_single_stride_log_num_of_bytes`		`min_single_stride_log_num_of_bytes`
	`max_single_stride_log_num_of_bytes`		`max_single_stride_log_num_of_bytes`
`ibv_exp_create_wq`	`mp_rq`	`mlx5dv_create_wq`	`striding_rq_attrs` `MLX5DV_WQ_INIT_ATTR_MASK_STRIDING_RQ`
`ibv_exp_poll_cq`	`mp_wr` `exp_wc_flags` `IBV_EXP_WC_MP_WR_MORE_IN_MSG` `IBV_EXP_WC_MP_WR_CONSUMED` `IBV_EXP_WC_RECV_NOP`	Not supported by RDMA-Core.
Capabilities and Device Attributes
`IBV_EXP_DEVICE_ATTR_MP_RQ`		Not supported by RDMA-Core.
`IBV_EXP_MP_RQ_SUP_TYPE_SRQ_TM`		Not supported by RDMA-Core.

Last updated: June 26, 2026