Hi Daniel, This RFC has been sitting for a while. I tested it on an RVA23 board (SpacemiT K3, Zawrs present) and it works: over a 200 ms wait, wrs.nto woke up 53 times vs 14.6M spins with pause, hand-off latency is the same, and the lock/ring/atomic autotests pass.
To move it forward it needs: - rebase - build-time detection via __riscv_zawrs, like the V extension in config/riscv/meson.build, instead of the manual meson flag; this also answers Stanisław's question about extension detection - int memorder -> rte_memory_order memorder - RTE_WAIT_UNTIL_MASKED: the alignment assert is inverted (!= 0 -> == 0) - do a plain load before taking the reservation; always starting with lr costs ~10% on the uncontended MP/MC ring path (ring_perf_autotest) - release notes and a note in cross_build_dpdk_for_riscv.rst If you are still interested, please send a v2 within a month (a short window only because the patch has been idle for over two years; if you need more time, just say so). Otherwise I will send a v2 with these changes, keeping your authorship. Thanks, Sun Yuechi
