mirror of
https://github.com/luxfi/node.git
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zeekay
7cf87b230b
The module already called itself github.com/luxfi/node while containing no node in Go: cmd/luxd was twenty-one lines that printed the size of a few types, and the Go column of the matrix measured a VM plugin. A repo that fetches the thing it claims to be has not replaced it, so the Go sources move in — 1515 files, the daemon and everything under it — and the build reaches outside this module for nothing. Rust and C++ sit beside it unchanged and are still measured against it by the differential. That is the point of one repo: the reference implementation and the two ports are the same checkout, so parity is a thing you can run rather than a thing you assert. Verified: builds, and the closure carries no lux-private — checked at build time rather than believed. The daemon starts twelve chains on a local network (P X C Q Z A B G K M F, plus D through its plugin) and reports healthy.
78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package meter
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import (
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"math"
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"time"
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)
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var (
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_ Factory = (*ContinuousFactory)(nil)
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_ Meter = (*continuousMeter)(nil)
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)
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// ContinuousFactory implements the Factory interface by returning a continuous
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// time meter.
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type ContinuousFactory struct{}
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func (ContinuousFactory) New(halflife time.Duration) Meter {
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return NewMeter(halflife)
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}
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type continuousMeter struct {
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halflife float64
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value float64
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numCoresRunning float64
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lastUpdated time.Time
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}
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// NewMeter returns a new Meter with the provided halflife
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func NewMeter(halflife time.Duration) Meter {
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return &continuousMeter{
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halflife: float64(halflife) / math.Ln2,
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}
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}
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func (a *continuousMeter) Inc(now time.Time, numCores float64) {
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a.Read(now)
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a.numCoresRunning += numCores
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}
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func (a *continuousMeter) Dec(now time.Time, numCores float64) {
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a.Read(now)
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a.numCoresRunning -= numCores
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}
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func (a *continuousMeter) Read(now time.Time) float64 {
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timeSincePreviousUpdate := a.lastUpdated.Sub(now)
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if timeSincePreviousUpdate >= 0 {
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return a.value
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}
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a.lastUpdated = now
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factor := math.Exp(float64(timeSincePreviousUpdate) / a.halflife)
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a.value *= factor
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a.value += a.numCoresRunning * (1 - factor)
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return a.value
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}
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func (a *continuousMeter) TimeUntil(now time.Time, value float64) time.Duration {
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currentValue := a.Read(now)
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if currentValue <= value {
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return time.Duration(0)
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}
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// Note that [factor] >= 1
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factor := currentValue / value
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// Note that [numHalfLives] >= 0
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numHalflives := math.Log(factor)
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duration := numHalflives * a.halflife
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// Overflow protection
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if duration > math.MaxInt64 {
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return time.Duration(math.MaxInt64)
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}
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return time.Duration(duration)
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}
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