RISC-V Design · All levels
IOMMU Translation and the DMA Memory View: Reports and Metrics
Reports and Metrics for IOMMU Translation and the DMA Memory View.
Reports and metrics
Reports and Metrics for IOMMU Translation and the DMA Memory View is anchored on DMA translation fault rate, device-TLB miss latency, and end-to-end I/O bandwidth impact with isolation enabled.. Convert observations into mechanism-backed decisions with explicit ownership.
Before/after trend
diagram
BEFORE / AFTER TREND - IOMMU Translation and the DMA Memory View
DMA translation fault rate, device-TLB miss latency, and end-to-end I/O bandwidth impact with isolation enabled.
^
| 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 - IOMMU Translation and the DMA Memory View
DMA translation fault rate, device-TLB miss latency, and end-to-end I/O bandwidth impact with isolation enabled. 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 DMA translation fault rate, device-TLB miss latency, and end-to-end I/O bandwidth impact with isolation enabled. 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.