Dynamically Connected On-Demand-Paging (DC ODP)

Migration to RDMA-Core-v1.0
  • ibv_exp_query_device

    • dc_odp_caps

  • mlx5dv_query_device

    • comp_mask: MLX5DV_CONTEXT_MASK_DC_ODP_CAPS

    • dc_odp_caps with enum ibv_odp_transport_cap_bits

Enabling ODP for DC is done, as in all other transports, by setting the IBV_ACCESS_ON_DEMAND flag in ibv_reg_mr access parameter.

Example

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struct mlx5dv_context attr_out = {}; attr_out.comp_mask |= MLX5DV_CONTEXT_MASK_DC_ODP_CAPS; mlx5dv_query_device(context, &attr_out); if (attr_out.dc_odp_caps & IBV_ODP_SUPPORT_SEND) printf(“support DC ODP send operation”);

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