cfc65a13f6
This commit includes updates that affects the build, testing, and
deployment of Tile38.
- The root level build.sh has been broken up into multiple scripts
and placed in the "scripts" directory.
- The vendor directory has been updated to follow the Go modules
rules, thus `make` should work on isolated environments. Also
some vendored packages may have been updated to a later
version, if needed.
- The Makefile has been updated to allow for making single
binaries such as `make tile38-server`. There is some scaffolding
during the build process, so from now on all binaries should be
made using make. For example, to run a development version of
the tile38-cli binary, do this:
make tile38-cli && ./tile38-cli
not this:
go run cmd/tile38-cli/main.go
- Travis.CI docker push script has been updated to address a
change to Docker's JSON repo meta output, which in turn fixes
a bug where new Tile38 versions were not being properly pushed
to Docker
77 lines
2.6 KiB
Go
77 lines
2.6 KiB
Go
package metrics
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import (
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"runtime/debug"
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"time"
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)
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var (
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debugMetrics struct {
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GCStats struct {
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LastGC Gauge
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NumGC Gauge
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Pause Histogram
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//PauseQuantiles Histogram
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PauseTotal Gauge
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}
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ReadGCStats Timer
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}
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gcStats debug.GCStats
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)
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// Capture new values for the Go garbage collector statistics exported in
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// debug.GCStats. This is designed to be called as a goroutine.
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func CaptureDebugGCStats(r Registry, d time.Duration) {
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for _ = range time.Tick(d) {
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CaptureDebugGCStatsOnce(r)
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}
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}
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// Capture new values for the Go garbage collector statistics exported in
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// debug.GCStats. This is designed to be called in a background goroutine.
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// Giving a registry which has not been given to RegisterDebugGCStats will
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// panic.
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//
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// Be careful (but much less so) with this because debug.ReadGCStats calls
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// the C function runtime·lock(runtime·mheap) which, while not a stop-the-world
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// operation, isn't something you want to be doing all the time.
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func CaptureDebugGCStatsOnce(r Registry) {
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lastGC := gcStats.LastGC
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t := time.Now()
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debug.ReadGCStats(&gcStats)
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debugMetrics.ReadGCStats.UpdateSince(t)
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debugMetrics.GCStats.LastGC.Update(int64(gcStats.LastGC.UnixNano()))
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debugMetrics.GCStats.NumGC.Update(int64(gcStats.NumGC))
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if lastGC != gcStats.LastGC && 0 < len(gcStats.Pause) {
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debugMetrics.GCStats.Pause.Update(int64(gcStats.Pause[0]))
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}
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//debugMetrics.GCStats.PauseQuantiles.Update(gcStats.PauseQuantiles)
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debugMetrics.GCStats.PauseTotal.Update(int64(gcStats.PauseTotal))
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}
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// Register metrics for the Go garbage collector statistics exported in
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// debug.GCStats. The metrics are named by their fully-qualified Go symbols,
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// i.e. debug.GCStats.PauseTotal.
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func RegisterDebugGCStats(r Registry) {
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debugMetrics.GCStats.LastGC = NewGauge()
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debugMetrics.GCStats.NumGC = NewGauge()
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debugMetrics.GCStats.Pause = NewHistogram(NewExpDecaySample(1028, 0.015))
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//debugMetrics.GCStats.PauseQuantiles = NewHistogram(NewExpDecaySample(1028, 0.015))
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debugMetrics.GCStats.PauseTotal = NewGauge()
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debugMetrics.ReadGCStats = NewTimer()
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r.Register("debug.GCStats.LastGC", debugMetrics.GCStats.LastGC)
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r.Register("debug.GCStats.NumGC", debugMetrics.GCStats.NumGC)
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r.Register("debug.GCStats.Pause", debugMetrics.GCStats.Pause)
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//r.Register("debug.GCStats.PauseQuantiles", debugMetrics.GCStats.PauseQuantiles)
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r.Register("debug.GCStats.PauseTotal", debugMetrics.GCStats.PauseTotal)
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r.Register("debug.ReadGCStats", debugMetrics.ReadGCStats)
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}
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// Allocate an initial slice for gcStats.Pause to avoid allocations during
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// normal operation.
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func init() {
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gcStats.Pause = make([]time.Duration, 11)
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}
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