Migration to RDMA-Core
Migration to RDMA-Core-v1.0

Contiguous Pages

Contiguous Pages improves performance by allocating user memory regions over physical contiguous pages. It enables a user application to ask low level drivers to allocate contiguous memory for it as part of ibv_reg_mr.

Environmental Variables

Value

MLX_QP_ALLOC_TYPE

CONTIG, PREFER_CONTIG

MLX_CQ_ALLOC_TYPE

CONTIG, PREFER_CONTIG

MLX_MR_MAX_LOG2_CONTIG_BSIZE

_MAX_LOG2_CONTIG_BLOCK_SIZE (23)

MLX_MR_MIN_LOG2_CONTIG_BSIZE

_MIN_LOG2_CONTIG_BLOCK_SIZE (12)

HUGE_CQ

qp_huge_key

  • ibv_exp_reg_mr

    • IBV_EXP_ACCESS_ALLOCATE_MR

  • ibv_exp_rereg_mr

    • IBV_EXP_ACCESS_ALLOCATE_MR

Contiguous memory in RDMA-Core is achieved using huge pages.

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