76 lines
2.4 KiB
Go
76 lines
2.4 KiB
Go
// Copyright 2014 The Chihaya Authors. All rights reserved.
|
|
// Use of this source code is governed by the BSD 2-Clause license,
|
|
// which can be found in the LICENSE file.
|
|
|
|
package stats
|
|
|
|
import "runtime"
|
|
|
|
// BasicMemStats includes a few of the fields from runtime.MemStats suitable for
|
|
// general logging.
|
|
type BasicMemStats struct {
|
|
// General statistics.
|
|
Alloc uint64 // bytes allocated and still in use
|
|
TotalAlloc uint64 // bytes allocated (even if freed)
|
|
Sys uint64 // bytes obtained from system (sum of XxxSys in runtime)
|
|
Lookups uint64 // number of pointer lookups
|
|
Mallocs uint64 // number of mallocs
|
|
Frees uint64 // number of frees
|
|
|
|
// Main allocation heap statistics.
|
|
HeapAlloc uint64 // bytes allocated and still in use
|
|
HeapSys uint64 // bytes obtained from system
|
|
HeapIdle uint64 // bytes in idle spans
|
|
HeapInuse uint64 // bytes in non-idle span
|
|
HeapReleased uint64 // bytes released to the OS
|
|
HeapObjects uint64 // total number of allocated objects
|
|
|
|
// Garbage collector statistics.
|
|
PauseTotalNs uint64
|
|
}
|
|
|
|
type MemStatsPlaceholder interface{}
|
|
|
|
// MemStatsWrapper wraps runtime.MemStats with an optionally less verbose JSON
|
|
// representation. The JSON field names correspond exactly to the runtime field
|
|
// names to avoid reimplementing the entire struct.
|
|
type MemStatsWrapper struct {
|
|
MemStatsPlaceholder `json:"Memory"`
|
|
|
|
basic *BasicMemStats
|
|
cache *runtime.MemStats
|
|
}
|
|
|
|
func NewMemStatsWrapper(verbose bool) *MemStatsWrapper {
|
|
stats := &MemStatsWrapper{cache: &runtime.MemStats{}}
|
|
|
|
if verbose {
|
|
stats.MemStatsPlaceholder = stats.cache
|
|
} else {
|
|
stats.basic = &BasicMemStats{}
|
|
stats.MemStatsPlaceholder = stats.basic
|
|
}
|
|
return stats
|
|
}
|
|
|
|
// Update fetches the current memstats from runtime and resets the cache.
|
|
func (s *MemStatsWrapper) Update() {
|
|
runtime.ReadMemStats(s.cache)
|
|
|
|
if s.basic != nil {
|
|
// Gross, but any decent editor can generate this in a couple commands.
|
|
s.basic.Alloc = s.cache.Alloc
|
|
s.basic.TotalAlloc = s.cache.TotalAlloc
|
|
s.basic.Sys = s.cache.Sys
|
|
s.basic.Lookups = s.cache.Lookups
|
|
s.basic.Mallocs = s.cache.Mallocs
|
|
s.basic.Frees = s.cache.Frees
|
|
s.basic.HeapAlloc = s.cache.HeapAlloc
|
|
s.basic.HeapSys = s.cache.HeapSys
|
|
s.basic.HeapIdle = s.cache.HeapIdle
|
|
s.basic.HeapInuse = s.cache.HeapInuse
|
|
s.basic.HeapReleased = s.cache.HeapReleased
|
|
s.basic.HeapObjects = s.cache.HeapObjects
|
|
s.basic.PauseTotalNs = s.cache.PauseTotalNs
|
|
}
|
|
}
|