Decreasing access latencies of non-volatile memory (NVM) demonstrate the need for a more efficient software storage stack. Remote Direct Memory Access (RDMA) is a useful lightweight mechanism for accessing NVM, as demonstrated by FlashNet. FlashNet is a kernel space solution which integrates the softiwarp RDMA endpoint and SALSA software Flash controller to allow local and remote endpoints to access storage using RDMA. In this study, we use the Data Plane Development Kit (DPDK) to develop a userspace RDMA endpoint called USIW (Userspace SoftiWARP), to be the rst component of a userspace analogue to FlashNet. We examine the performance of USIW compared to the kernel softiwarp using standard verbs-level microbenchmarks.
By: P.I. MacArthur
Published in: RZ3894 in 2016
LIMITED DISTRIBUTION NOTICE:
This Research Report is available. This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publication. It has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of IBM prior to publication should be limited to peer communications and specific requests. After outside publication, requests should be filled only by reprints or legally obtained copies of the article (e.g., payment of royalties). I have read and understand this notice and am a member of the scientific community outside or inside of IBM seeking a single copy only.
Questions about this service can be mailed to reports@us.ibm.com .