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Processes: CPU power beside the clock, from the packages' energy counters

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New sensor cpu.power: watts from the RAPL energy counters (Intel, and AMD
Zen through the same driver), summed over every package and averaged into
history. Parts of a package, psys and the MMIO duplicate are left out.

The counters are root-only, so a daemon that isn't root reads them through
`hamlab cpu-energy`, a root helper started once with sudo or doas and asked
over a pipe each sample, the same shape as the GPU client walk's helper.
It reads only the counters it finds itself. No counters or no root means
no reading, and the CPU box shows nothing extra.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Mitchell-Johnson
2026-10-10 23:58:35 -07:00
co-authored by Claude Opus 5.5
parent d5680e8e41
commit bfedf622be
9 changed files with 398 additions and 5 deletions
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web/src/Top.tsx
+2 -1
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@@ -369,7 +369,8 @@ export default function Top() {
<div className="t-up">up {upfor(uptime)}</div>
</div>
<div className="t-cores">
<div className="t-cores-head"><b>{model || 'cpu'}</b><span className="spacer" />{pt?.cpu_mhz ? `${Math.round(pt.cpu_mhz)} MHz` : ''}</div>
<div className="t-cores-head"><b>{model || 'cpu'}</b><span className="spacer" />{pt?.cpu_mhz ? `${Math.round(pt.cpu_mhz)} MHz` : ''}
{pt?.cpu_power_w ? <span title="the CPU's own power reading: cores, built-in graphics and memory controller, not the whole machine">{pt.cpu_mhz ? ' · ' : ''}{pt.cpu_power_w < 10 ? pt.cpu_power_w.toFixed(1) : Math.round(pt.cpu_power_w)} W</span> : null}</div>
<div className="t-core">
<span className="t-core-n">CPU</span>
<Meter pct={cpu} grad="cpu" />
web/src/api.ts
+1 -1
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@@ -85,7 +85,7 @@ export interface GPU {
mhz?: number; req_mhz?: number; max_mhz?: number; mem_used?: number; mem_total?: number
clients: GPUClient[]; clients_ok: boolean; stalled?: boolean
}
export interface ProcTable { t: number; cpu: number; cores: number[]; cpu_hist: number[]; cpu_model?: string; cpu_mhz?: number; cpu_max_mhz?: number; cpu_temp?: number; core_ids?: number[]; load: [number, number, number]; mem: MemInfo; swap: MemInfo; net: NetIf[]; gpus?: GPU[]; uptime: number; procs: Proc[]; total: number; running: number }
export interface ProcTable { t: number; cpu: number; cores: number[]; cpu_hist: number[]; cpu_model?: string; cpu_mhz?: number; cpu_max_mhz?: number; cpu_power_w?: number; cpu_temp?: number; core_ids?: number[]; load: [number, number, number]; mem: MemInfo; swap: MemInfo; net: NetIf[]; gpus?: GPU[]; uptime: number; procs: Proc[]; total: number; running: number }
export interface Sample {
t: number; interval_ms: number; cpu: number; cores: number[]; load: [number, number, number]
mem: { total: number; used: number; avail: number }; swap: { total: number; used: number; avail: number }