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https://github.com/golang/go
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d9ab56aa29
This changes to use a mutex and directly execute the less performance sensitive telemetry calls (tracing and logging) and then uses a submission queue only for stats adjustments as those are much more sensitive (but it should also be easier to keep up with them in bursts) Fixes golang/go#33692 Change-Id: Ia59a8975f21dfbfcf115be1f1d11b097be8dd9c8 Reviewed-on: https://go-review.googlesource.com/c/tools/+/190737 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org> Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
41 lines
1012 B
Go
41 lines
1012 B
Go
// Copyright 2019 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 stats
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import (
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"fmt"
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"os"
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)
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var (
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// TODO: Think about whether this is the right concurrency model, and what
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// TODO: the queue length should be
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workQueue = make(chan func(), 1000)
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)
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func init() {
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go func() {
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for task := range workQueue {
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task()
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}
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}()
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}
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// do adds a task to the list of things to work on in the background.
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// All tasks will be handled in submission order, and no two tasks will happen
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// concurrently so they do not need to do any kind of locking.
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// It is safe however to call Do concurrently.
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// No promises are made about when the tasks will be performed.
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// This function may block, but in general it will return very quickly and
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// before the task has been run.
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func do(task func()) {
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select {
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case workQueue <- task:
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default:
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fmt.Fprint(os.Stderr, "work queue is full\n")
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workQueue <- task
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}
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}
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