mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-29 13:05:46 +00:00
86c271caba
The RusagePrefixLog is rarely useful, hasn't been useful in a long time, is rarely the measurement we need, and is pretty spammy (and syscall-heavy). Disable it by default. We can enable it when we're debugging memory.
25 lines
693 B
Go
25 lines
693 B
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package logger
|
|
|
|
import (
|
|
"fmt"
|
|
"runtime"
|
|
)
|
|
|
|
// RusagePrefixLog returns a Logf func wrapping the provided logf func that adds
|
|
// a prefixed log message to each line with the current binary memory usage
|
|
// and max RSS.
|
|
func RusagePrefixLog(logf Logf) Logf {
|
|
return func(f string, argv ...interface{}) {
|
|
var m runtime.MemStats
|
|
runtime.ReadMemStats(&m)
|
|
goMem := float64(m.HeapInuse+m.StackInuse) / (1 << 20)
|
|
maxRSS := rusageMaxRSS()
|
|
pf := fmt.Sprintf("%.1fM/%.1fM %s", goMem, maxRSS, f)
|
|
logf(pf, argv...)
|
|
}
|
|
}
|