RISC-V Design · All levels

Base Integer ISA (RV32I and RV64I) Execution Model: Reports and Metrics

Reports and Metrics for Base Integer ISA (RV32I and RV64I) Execution Model.

Reports and metrics

Reports and Metrics for Base Integer ISA (RV32I and RV64I) Execution Model is anchored on Instruction count mix, branch density, and CPI breakdown by ALU, load/store, branch, and control-transfer classes.. Convert observations into mechanism-backed decisions with explicit ownership.

Before/after trend

diagram
BEFORE / AFTER TREND - Base Integer ISA (RV32I and RV64I) Execution Model

Instruction count mix, branch density, and CPI breakdown by ALU, load/store, branch, and control-transfer classes.
  ^
  |                           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 - Base Integer ISA (RV32I and RV64I) Execution Model

Instruction count mix, branch density, and CPI breakdown by ALU, load/store, branch, and control-transfer classes. 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 Instruction count mix, branch density, and CPI breakdown by ALU, load/store, branch, and control-transfer classes. 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.