test(benchmarks): automatic peak-memory-vs-native column#201
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NathanFlurry merged 1 commit intoJul 2, 2026
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Every latency-matrix op now reports peak memory attributable to the work, per lane, plus memTax = guestPeak/nativePeak: - guest/wasm/vmCmd lanes: sidecar peak above the prewarmed baseline — write 5 to /proc/<sidecarPid>/clear_refs after prewarm (resets VmHWM), baseline VmRSS, then post-op VmHWM minus baseline (clamped >= 0). Idle-VM self-check runs once per matrix invocation and prints ~0 (measured 0B). - native/node lanes: live-child /proc VmHWM polling minus a measured nop startup baseline (native-baseline cpu_loop --iters 1 / node -e ''), floored to one page. GNU time -v is absent on this host, so /proc sampling is used uniformly. - Per-lane provenance strings recorded in results JSON; columns render '-' with a printed reason on non-Linux. Documented in the benchmarks README and CLAUDE.md §Benchmarks.
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Every latency-matrix op now reports peak memory attributable to the work, per
lane, plus memTax = guestPeak/nativePeak:
to /proc//clear_refs after prewarm (resets VmHWM), baseline
VmRSS, then post-op VmHWM minus baseline (clamped >= 0). Idle-VM self-check
runs once per matrix invocation and prints ~0 (measured 0B).
startup baseline (native-baseline cpu_loop --iters 1 / node -e ''), floored
to one page. GNU time -v is absent on this host, so /proc sampling is used
uniformly.
with a printed reason on non-Linux. Documented in the benchmarks README and
CLAUDE.md §Benchmarks.