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In this presentation, we explore the integration of advanced RISC-V extensions to enhance the performance and efficiency of DPDK.
1. CRC Implementation with Zbc Extension: The RISC-V Zbc extension introduces instructions for carry-less multiplication, which can be leveraged to implement Cyclic Redundancy Check (CRC) in hardware.
2. Efficient Waiting with Zawrs Extension: We demonstrate how to use Zawrs instructions to implement RISC-V-specific versions of the rte_wait_until_equal_* functions, including handling 16-bit values through pointer rounding and bit shifting. The Zawrs extension is also applicable to the DPDK power management library.
3. Prefetching with Zicbop Extension: The RISC-V Zicbop extension introduces instructions for cache block operations, which can be utilized to implement the rte_prefetch* family of functions.
Through detailed examples and performance benchmarks, we illustrate the benefits of these RISC-V extensions in optimising DPDK operations. Attendees will gain insights into the practical implementation of these techniques and their impact on performance and energy efficiency in data plane applications.
