RISC-V Design · All levels

RVV Vector Basics: Reports and Metrics

Reports and Metrics for RVV Vector Basics.

Reports and metrics

Reports and Metrics for RVV Vector Basics is anchored on Sustained vector utilization across mixed-width kernels while keeping scalar fallback correctness intact.. Convert observations into mechanism-backed decisions with explicit ownership.

Before/after trend

diagram
BEFORE / AFTER TREND - RVV Vector Basics

Sustained vector utilization across mixed-width kernels while keeping scalar fallback correctness intact.
  ^
  |                           o target band
  |                    o after fix + reruns
  |             o
  |      o baseline (failing)
  +--------------------------------------------------> iteration
       capture issue      isolate mechanism      close + monitor

Use this view to confirm the gain is causal and stable across seeds.

Root-cause tree

diagram
ROOT CAUSE TREE - RVV Vector Basics

Sustained vector utilization across mixed-width kernels while keeping scalar fallback correctness intact. regressed
          |
   reproducible on fixed seed?
      /                 \
    no                   yes
    |                     |
env/tool drift       first failing domain?
                     /        |         \
                  decode    execute    memory/MMU
                    |         |            |
               control map  bypass/FU   TLB/walk/perm
                    |
         privilege/CSR side effects checked?

Stop at first confirmed mechanism, then assign explicit owner + fix proof.
  • Track Sustained vector utilization across mixed-width kernels while keeping scalar fallback correctness intact. on representative workloads, not just microbenchmarks.

  • Include build/runtime/privilege metadata in report headers.

  • Pair performance movement with correctness and reliability checks.

  • Report tail stability, not only mean uplift.