mirror of
https://github.com/gravitational/teleport
synced 2024-10-21 17:53:28 +00:00
e809a7eb2c
Fixes #1698. * Added sync.Pool to take care of many gzip.Writer allocating a lot of large objects on the heap. * Reshuffled signal handling, SIGQUIT is now graceful shutdown, just like in Nginx. * Signal USR1 prints hepful diagnostic info to stderr. * Removed gops endpoint and flags. * Fixed logs in some places. * Debug flag now adds extra pprof handlers to diagnostic endpoint.
90 lines
2.9 KiB
Go
90 lines
2.9 KiB
Go
/*
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Copyright 2017 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package service
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import (
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"fmt"
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"io"
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"runtime"
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"runtime/pprof"
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"time"
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)
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// writeDebugInfo writes debugging information
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// about this process
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func writeDebugInfo(w io.Writer) {
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fmt.Fprintf(w, "Runtime stats\n")
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runtimeStats(w)
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fmt.Fprintf(w, "Memory stats\n")
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memStats(w)
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fmt.Fprintf(w, "Goroutines\n")
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goroutineDump(w)
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}
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func goroutineDump(w io.Writer) {
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pprof.Lookup("goroutine").WriteTo(w, 2)
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}
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func runtimeStats(w io.Writer) {
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fmt.Fprintf(w, "goroutines: %v\n", runtime.NumGoroutine())
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fmt.Fprintf(w, "OS threads: %v\n", pprof.Lookup("threadcreate").Count())
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fmt.Fprintf(w, "GOMAXPROCS: %v\n", runtime.GOMAXPROCS(0))
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fmt.Fprintf(w, "num CPU: %v\n", runtime.NumCPU())
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}
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func memStats(w io.Writer) {
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var s runtime.MemStats
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runtime.ReadMemStats(&s)
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fmt.Fprintf(w, "alloc: %v\n", s.Alloc)
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fmt.Fprintf(w, "total-alloc: %v\n", s.TotalAlloc)
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fmt.Fprintf(w, "sys: %v\n", s.Sys)
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fmt.Fprintf(w, "lookups: %v\n", s.Lookups)
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fmt.Fprintf(w, "mallocs: %v\n", s.Mallocs)
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fmt.Fprintf(w, "frees: %v\n", s.Frees)
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fmt.Fprintf(w, "heap-alloc: %v\n", s.HeapAlloc)
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fmt.Fprintf(w, "heap-sys: %v\n", s.HeapSys)
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fmt.Fprintf(w, "heap-idle: %v\n", s.HeapIdle)
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fmt.Fprintf(w, "heap-in-use: %v\n", s.HeapInuse)
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fmt.Fprintf(w, "heap-released: %v\n", s.HeapReleased)
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fmt.Fprintf(w, "heap-objects: %v\n", s.HeapObjects)
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fmt.Fprintf(w, "stack-in-use: %v\n", s.StackInuse)
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fmt.Fprintf(w, "stack-sys: %v\n", s.StackSys)
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fmt.Fprintf(w, "stack-mspan-inuse: %v\n", s.MSpanInuse)
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fmt.Fprintf(w, "stack-mspan-sys: %v\n", s.MSpanSys)
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fmt.Fprintf(w, "stack-mcache-inuse: %v\n", s.MCacheInuse)
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fmt.Fprintf(w, "stack-mcache-sys: %v\n", s.MCacheSys)
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fmt.Fprintf(w, "other-sys: %v\n", s.OtherSys)
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fmt.Fprintf(w, "gc-sys: %v\n", s.GCSys)
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fmt.Fprintf(w, "next-gc: when heap-alloc >= %v\n", s.NextGC)
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lastGC := "-"
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if s.LastGC != 0 {
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lastGC = fmt.Sprint(time.Unix(0, int64(s.LastGC)))
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}
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fmt.Fprintf(w, "last-gc: %v\n", lastGC)
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fmt.Fprintf(w, "gc-pause-total: %v\n", time.Duration(s.PauseTotalNs))
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fmt.Fprintf(w, "gc-pause: %v\n", s.PauseNs[(s.NumGC+255)%256])
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fmt.Fprintf(w, "num-gc: %v\n", s.NumGC)
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fmt.Fprintf(w, "enable-gc: %v\n", s.EnableGC)
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fmt.Fprintf(w, "debug-gc: %v\n", s.DebugGC)
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}
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