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Virual Oral Question and Answer
IEEE/ICACT20260323 Question.7
Questioner: zhaozx@dsp.ac.cn    2026-02-10 오후 4:55:20 		IEEE/ICACT20260323 Answer.7
Answer by Auhor wangsy@dsp.ac.cn   2026-02-10 오후 4:55:20
Why did you use "unified ring DDR_data + two-level DDR_idx"? What was the most crucial design motivation? The unified DDR_data ring enables sequential writes for all cloned packets, which matches DRAM’s strength. The two-level DDR_idx avoids per-packet random metadata in large flat tables and avoids pointer chasing in linked lists. Together, they reduce random DRAM accesses, improve row-buffer locality, and keep repair readbacks as long coalesced bursts, which is essential for 100Gb/s.

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