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- W2735220890 abstract "A network latency emulator allows IT architects to thoroughly investigate how network latencies impact workload performance. Software-based emulation tools have been widely used by researchers and engineers. It is possible to use commodity server computers for emulation and set up an emulation environment quickly without outstanding hardware cost. However, existing software-based tools built in the network stack of an operating system are not capable of supporting the bandwidth of today's standard interconnects (e.g., 10GbE) and emulating sub-milliseconds latencies likely caused by network virtualization in a datacenter. In this paper, we propose a network latency emulator (DEMU) supporting broad bandwidth traffic with sub-milliseconds accuracy, which is based on an emerging packet processing framework, DPDK. It avoids the overhead of the network stack by directly interacting with NIC hardware. Through experiments, we confirmed that DEMU can emulate latencies on the order of 10 μs for short-packet traffic at the line rate of 10GbE. The standard deviation of inserted delays was only 2-3 μs. This is a significant improvement from a network emulator built in the Linux Kernel (i.e., NetEm), which loses more than 50% of its packets for the same 10GbE traffic. For 1 Gbps traffic, the latency deviation of NetEm was approximately 20 μs, while that of our mechanism was 2 orders of magnitude smaller (i.e., only 0.3 μs)." @default.
- W2735220890 created "2017-07-21" @default.
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- W2735220890 date "2017-06-01" @default.
- W2735220890 modified "2023-09-27" @default.
- W2735220890 title "DEMU: A DPDK-based network latency emulator" @default.
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- W2735220890 doi "https://doi.org/10.1109/lanman.2017.7972145" @default.
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