mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-30 07:59:40 -08:00
137 lines
3.4 KiB
Go
137 lines
3.4 KiB
Go
// Copyright 2022 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package agent
|
|
|
|
import (
|
|
"math"
|
|
"strconv"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
|
|
"github.com/prometheus/prometheus/model/labels"
|
|
"github.com/prometheus/prometheus/tsdb/chunks"
|
|
)
|
|
|
|
func TestNoDeadlock(t *testing.T) {
|
|
const numWorkers = 1000
|
|
|
|
var (
|
|
wg sync.WaitGroup
|
|
started = make(chan struct{})
|
|
stripeSeries = newStripeSeries(3)
|
|
)
|
|
|
|
wg.Add(numWorkers)
|
|
for i := 0; i < numWorkers; i++ {
|
|
go func() {
|
|
defer wg.Done()
|
|
<-started
|
|
_ = stripeSeries.GC(math.MaxInt64)
|
|
}()
|
|
}
|
|
|
|
wg.Add(numWorkers)
|
|
for i := 0; i < numWorkers; i++ {
|
|
go func(i int) {
|
|
defer wg.Done()
|
|
<-started
|
|
|
|
series := &memSeries{
|
|
ref: chunks.HeadSeriesRef(i),
|
|
lset: labels.FromMap(map[string]string{
|
|
"id": strconv.Itoa(i),
|
|
}),
|
|
}
|
|
stripeSeries.Set(series.lset.Hash(), series)
|
|
}(i)
|
|
}
|
|
|
|
finished := make(chan struct{})
|
|
go func() {
|
|
wg.Wait()
|
|
close(finished)
|
|
}()
|
|
|
|
close(started)
|
|
select {
|
|
case <-finished:
|
|
return
|
|
case <-time.After(15 * time.Second):
|
|
require.FailNow(t, "deadlock detected")
|
|
}
|
|
}
|
|
|
|
func labelsWithHashCollision() (labels.Labels, labels.Labels) {
|
|
// These two series have the same XXHash; thanks to https://github.com/pstibrany/labels_hash_collisions
|
|
ls1 := labels.FromStrings("__name__", "metric", "lbl1", "value", "lbl2", "l6CQ5y")
|
|
ls2 := labels.FromStrings("__name__", "metric", "lbl1", "value", "lbl2", "v7uDlF")
|
|
|
|
if ls1.Hash() != ls2.Hash() {
|
|
// These ones are the same when using -tags stringlabels
|
|
ls1 = labels.FromStrings("__name__", "metric", "lbl", "HFnEaGl")
|
|
ls2 = labels.FromStrings("__name__", "metric", "lbl", "RqcXatm")
|
|
}
|
|
|
|
if ls1.Hash() != ls2.Hash() {
|
|
panic("This code needs to be updated: find new labels with colliding hash values.")
|
|
}
|
|
|
|
return ls1, ls2
|
|
}
|
|
|
|
// stripeSeriesWithCollidingSeries returns a stripeSeries with two memSeries having the same, colliding, hash.
|
|
func stripeSeriesWithCollidingSeries(_ *testing.T) (*stripeSeries, *memSeries, *memSeries) {
|
|
lbls1, lbls2 := labelsWithHashCollision()
|
|
ms1 := memSeries{
|
|
lset: lbls1,
|
|
}
|
|
ms2 := memSeries{
|
|
lset: lbls2,
|
|
}
|
|
hash := lbls1.Hash()
|
|
s := newStripeSeries(1)
|
|
|
|
s.Set(hash, &ms1)
|
|
s.Set(hash, &ms2)
|
|
|
|
return s, &ms1, &ms2
|
|
}
|
|
|
|
func TestStripeSeries_Get(t *testing.T) {
|
|
s, ms1, ms2 := stripeSeriesWithCollidingSeries(t)
|
|
hash := ms1.lset.Hash()
|
|
|
|
// Verify that we can get both of the series despite the hash collision
|
|
got := s.GetByHash(hash, ms1.lset)
|
|
require.Same(t, ms1, got)
|
|
got = s.GetByHash(hash, ms2.lset)
|
|
require.Same(t, ms2, got)
|
|
}
|
|
|
|
func TestStripeSeries_gc(t *testing.T) {
|
|
s, ms1, ms2 := stripeSeriesWithCollidingSeries(t)
|
|
hash := ms1.lset.Hash()
|
|
|
|
s.GC(1)
|
|
|
|
// Verify that we can get neither ms1 nor ms2 after gc-ing corresponding series
|
|
got := s.GetByHash(hash, ms1.lset)
|
|
require.Nil(t, got)
|
|
got = s.GetByHash(hash, ms2.lset)
|
|
require.Nil(t, got)
|
|
}
|