Measured · Ryzen 9 9950X · Zen5 · 2026-08-12

Benchmarks

Fingerprint SLC:AMD:ZEN5:1A:44:00:567dcabfdc75b2c3:cbb6a67840c83bca. Re-run locally. Losses are published.

Single-Zen evaluation pack

cargo run -p silicera-cli -- eval -o out/single-machine-eval.json
cargo run -p silicera-cli -- archive --eval out/single-machine-eval.json
FieldResult
Calm-checktrue (~1.6–1.9% drift)
Artifact suitenative_wins=3 · portable_wins=1
Alignment mattersfalse
Placement (4 threads)spread (run-dependent)
DeferredSilicon Split Machine B; full PGO/BOLT tables

Native artifacts (-C target-cpu=native vs x86-64-v2)

KernelPortable nsNative nsChoice
dot_f32167300145100→native
saxpy_f324880028800→native
checksum_u8660850692200→portable
reduce_i3289002800→native

checksum_u8 portable win is intentional honesty — do not hide it.

How to measure

cargo run -p silicera-cli -- calm-check
cargo run -p silicera-cli -- harness --domain all
cargo run -p silicera-cli -- native-artifacts --suite --merge-profile out/profile.hnep
cargo run -p silicera-cli -- remarks out/profile.hnep -o out/remarks.yaml
cargo run -p silicera-cli -- feedback out/profile.hnep -o out/feedback.scf.json

Multi-machine (deferred)

Silicon Split Machine B remains a placeholder until a second Zen host exists. Verdict stays UNKNOWN. Protocol and CLI are ready; numbers are not invented.