forgejo/routers/web/admin/queue_tester.go
wxiaoguang 58dfaf3a75
Improve queue & process & stacktrace (#24636)
Although some features are mixed together in this PR, this PR is not
that large, and these features are all related.

Actually there are more than 70 lines are for a toy "test queue", so
this PR is quite simple.

Major features:

1. Allow site admin to clear a queue (remove all items in a queue)
* Because there is no transaction, the "unique queue" could be corrupted
in rare cases, that's unfixable.
* eg: the item is in the "set" but not in the "list", so the item would
never be able to be pushed into the queue.
* Now site admin could simply clear the queue, then everything becomes
correct, the lost items could be re-pushed into queue by future
operations.
3. Split the "admin/monitor" to separate pages
4. Allow to download diagnosis report
* In history, there were many users reporting that Gitea queue gets
stuck, or Gitea's CPU is 100%
    * With diagnosis report, maintainers could know what happens clearly

The diagnosis report sample:
[gitea-diagnosis-20230510-192913.zip](https://github.com/go-gitea/gitea/files/11441346/gitea-diagnosis-20230510-192913.zip)
, use "go tool pprof profile.dat" to view the report.


Screenshots:


![image](https://github.com/go-gitea/gitea/assets/2114189/320659b4-2eda-4def-8dc0-5ea08d578063)


![image](https://github.com/go-gitea/gitea/assets/2114189/c5c46fae-9dc0-44ca-8cd3-57beedc5035e)


![image](https://github.com/go-gitea/gitea/assets/2114189/6168a811-42a1-4e64-a263-0617a6c8c4fe)

---------

Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: Giteabot <teabot@gitea.io>
2023-05-11 07:45:47 +00:00

72 lines
1.7 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package admin
import (
gocontext "context"
"sync"
"time"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/queue"
"code.gitea.io/gitea/modules/setting"
)
var testQueueOnce sync.Once
// initTestQueueOnce initializes the test queue for dev mode
// the test queue will also be shown in the queue list
// developers could see the queue length / worker number / items number on the admin page and try to remove the items
func initTestQueueOnce() {
testQueueOnce.Do(func() {
qs := setting.QueueSettings{
Name: "test-queue",
Type: "channel",
Length: 20,
BatchLength: 2,
MaxWorkers: 3,
}
testQueue, err := queue.NewWorkerPoolQueueBySetting("test-queue", qs, func(t ...int64) (unhandled []int64) {
for range t {
select {
case <-graceful.GetManager().ShutdownContext().Done():
case <-time.After(5 * time.Second):
}
}
return nil
}, true)
if err != nil {
log.Error("unable to create test queue: %v", err)
return
}
queue.GetManager().AddManagedQueue(testQueue)
testQueue.SetWorkerMaxNumber(5)
go graceful.GetManager().RunWithShutdownFns(testQueue.Run)
go graceful.GetManager().RunWithShutdownContext(func(ctx gocontext.Context) {
cnt := int64(0)
adding := true
for {
select {
case <-ctx.Done():
case <-time.After(500 * time.Millisecond):
if adding {
if testQueue.GetQueueItemNumber() == qs.Length {
adding = false
}
} else {
if testQueue.GetQueueItemNumber() == 0 {
adding = true
}
}
if adding {
_ = testQueue.Push(cnt)
cnt++
}
}
}
})
})
}