StackMap: Low-Latency Networking with the OS Stack and Dedicated NICs

Kenichi Yasukata, Michio Honda, Douglas Santry, and Lars Eggert

2016 USENIX Annual Technical Conference
Denver, CO

StackMap leverages the best aspects of kernel-bypass networking into a new low-latency OS network service based on the full-featured TCP kernel implementation, by dedicating network interfaces to applications and offering an extended version of the netmap API for zero-copy, low-overhead data path alongside control path based on socket API. For small-message, transactional workloads, StackMap outperforms baseline Linux by 4 to 78 % in latency and 42 to 133 % in throughput. It also achieves comparable performance with Seastar, a highly-optimized user-level TCP/IP stack that runs on top of DPDK.

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