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On Apple Silicon under macOS 27, IOReport's CPU rails are frozen for an unprivileged reader, so detect_meter fell back to the load-average estimator: a guess, graded Estimator. Every Mac still publishes its total power in the SMC key PSTR, which any process reads through the AppleSMCKeysEndpoint IOKit user client with no root. New feature `smc` (macOS), module apple_smc: SmcSystemCounter integrates PSTR over time. - Domain: a new EnergyDomain::System, the whole machine (everything its DC input feeds: SoC, memory, storage, fans, the rest of the board; not the power supply's AC-to-DC loss). It holds SocTotal and every other domain. - Grade: ModelBased, like NVML's power.draw integral. PSTR is a power reading, not an energy counter, so no liveness probe can vouch for its integral. - Sampling: one thread per process reads PSTR every 100 ms and integrates the value it holds, so a figure does not depend on how often its caller reads; a read between polls extends the integral at the held value, which the next poll integrates over the same time, so readings never run backwards. - Checks: PSTR must be a 4-byte float and be seen to refresh before the counter is available (the first construction waits about a second); samples at 0 W or less, above 1.5 kW, or NaN are discarded and counted; a value held 10 s gives no figure. - Minimum window 2 s: PSTR refreshes about once a second (median gap 1.0 s on an M3 Ultra Mac Studio and an M5 Max MacBook Pro, macOS 27.2) and trails a step in load by about one refresh. detect_meter puts it after a live IOReport counter (a hardware reading over a narrower domain) and before the load-average estimator. Its figure holds the work and whatever else the machine powered, so it can read high, never low. mesh-meter's exhaustive covers_whole_request counts System as covering the whole request. SPEC 1.3 lists sampled vendor power integrated over time under ModelBased. Measured with the energy_probe example (2.5 s CPU churn, unprivileged): the M3 Ultra Mac Studio 299.9 J, 120.0 W; the M5 Max MacBook Pro on AC 160.9 J, 64.4 W. On the Studio PSTR equals the DC input (PDTR); on the MacBook Pro, on AC with the battery not charging, it read 51.7 W against 54.9 W at the input. Tests: the integral, monotonic reads, implausible samples, staleness and the sampler's start are driven with scripted samples and times; a hardware test meters a CPU burn from the real SMC and prints "apple-smc: measured", which a new macOS CI step greps under --features smc and ioreport,smc. The clippy step lints both. Passing on the M3 Ultra (smc, ioreport,smc, ioreport; clippy clean in default, ioreport, smc, ioreport,smc; mesh-meter with hw-meter-apple) and on Linux x86_64 (rapl,nvml; default clippy; mesh-meter with hw-meter-rapl). Co-Authored-By: Claude Opus 5.5 <[email protected]> |
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| .. | ||
| conformance.yml | ||
| energy-hardware.yml | ||
| joule-code-conformance.yml | ||
| joule-moq-remote.yml | ||
| joule-moq-room.yml | ||
| joule-moq-web.yml | ||
| jouleclaw-fabrics.yml | ||
| jouleclaw-public-surface-documented.yml | ||
| repo-checks.yml | ||
| standards-build.yml | ||
| wai-app.yml | ||
| wai-audit.yml | ||
| wai-breaking.yml | ||
| wai-byte-equality.yml | ||
| wai-catalogue.yml | ||
| wai-conformance.yml | ||
| wai-energy-receipts.yml | ||
| wai-examples.yml | ||
| wai-fleet.yml | ||
| wai-formal-verification.yml | ||
| wai-fuzz.yml | ||
| wai-http.yml | ||
| wai-jpegai-e2e.yml | ||
| wai-key-proxy.yml | ||
| wai-ledger.yml | ||
| wai-neural-e2e.yml | ||
| wai-neural-gates.yml | ||
| wai-ops-differential.yml | ||
| wai-ops-gpu.yml | ||
| wai-ops-npu.yml | ||
| wai-ops.yml | ||
| wai-pack.yml | ||
| wai-quantum-cli-release.yml | ||
| wai-quantum-cli.yml | ||
| wai-quantum-contract.yml | ||
| wai-quantum-cuda.yml | ||
| wai-quantum-dataflow.yml | ||
| wai-quantum-desktop-release.yml | ||
| wai-quantum-docs.yml | ||
| wai-quantum-dsp.yml | ||
| wai-quantum-editors.yml | ||
| wai-quantum-estimate.yml | ||
| wai-quantum-formats.yml | ||
| wai-quantum-fpga.yml | ||
| wai-quantum-hip.yml | ||
| wai-quantum-js-release.yml | ||
| wai-quantum-js.yml | ||
| wai-quantum-lang.yml | ||
| wai-quantum-metal.yml | ||
| wai-quantum-npu-cores.yml | ||
| wai-quantum-npu.yml | ||
| wai-quantum-opencl.yml | ||
| wai-quantum-processors.yml | ||
| wai-quantum-pulse.yml | ||
| wai-quantum-py-release.yml | ||
| wai-quantum-py.yml | ||
| wai-quantum-qec.yml | ||
| wai-quantum-qpu.yml | ||
| wai-quantum-registry.yml | ||
| wai-quantum-service.yml | ||
| wai-quantum-sme.yml | ||
| wai-quantum-studio.yml | ||
| wai-quantum-tensor-engine.yml | ||
| wai-quantum-tensor-program.yml | ||
| wai-quantum-variational.yml | ||
| wai-quantum-vector.yml | ||
| wai-quantum-verdict.yml | ||
| wai-quantum-views.yml | ||
| wai-quantum-webgpu.yml | ||
| wai-release.yml | ||
| wai-sink-android.yml | ||
| wai-sink-swift.yml | ||
| wai-sota-vectors.yml | ||
| wai-studio.yml | ||
| wai-vector.yml | ||
| wai-web-reach.yml | ||
| wai-web-wasm.yml | ||