mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-26 13:18:22 +00:00
126 lines
3.9 KiB
Go
126 lines
3.9 KiB
Go
// Copyright 2018 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package flowcontrol
|
|
|
|
import (
|
|
"math/rand"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common/mclock"
|
|
)
|
|
|
|
type testNode struct {
|
|
node *ClientNode
|
|
bufLimit, capacity uint64
|
|
waitUntil mclock.AbsTime
|
|
index, totalCost uint64
|
|
}
|
|
|
|
const (
|
|
testMaxCost = 1000000
|
|
testLength = 100000
|
|
)
|
|
|
|
// testConstantTotalCapacity simulates multiple request sender nodes and verifies
|
|
// whether the total amount of served requests matches the expected value based on
|
|
// the total capacity and the duration of the test.
|
|
// Some nodes are sending requests occasionally so that their buffer should regularly
|
|
// reach the maximum while other nodes (the "max capacity nodes") are sending at the
|
|
// maximum permitted rate. The max capacity nodes are changed multiple times during
|
|
// a single test.
|
|
func TestConstantTotalCapacity(t *testing.T) {
|
|
testConstantTotalCapacity(t, 10, 1, 0)
|
|
testConstantTotalCapacity(t, 10, 1, 1)
|
|
testConstantTotalCapacity(t, 30, 1, 0)
|
|
testConstantTotalCapacity(t, 30, 2, 3)
|
|
testConstantTotalCapacity(t, 100, 1, 0)
|
|
testConstantTotalCapacity(t, 100, 3, 5)
|
|
testConstantTotalCapacity(t, 100, 5, 10)
|
|
}
|
|
|
|
func testConstantTotalCapacity(t *testing.T, nodeCount, maxCapacityNodes, randomSend int) {
|
|
clock := &mclock.Simulated{}
|
|
nodes := make([]*testNode, nodeCount)
|
|
var totalCapacity uint64
|
|
for i := range nodes {
|
|
nodes[i] = &testNode{capacity: uint64(50000 + rand.Intn(100000))}
|
|
totalCapacity += nodes[i].capacity
|
|
}
|
|
m := NewClientManager(PieceWiseLinear{{0, totalCapacity}}, clock)
|
|
for _, n := range nodes {
|
|
n.bufLimit = n.capacity * 6000
|
|
n.node = NewClientNode(m, ServerParams{BufLimit: n.bufLimit, MinRecharge: n.capacity})
|
|
}
|
|
maxNodes := make([]int, maxCapacityNodes)
|
|
for i := range maxNodes {
|
|
// we don't care if some indexes are selected multiple times
|
|
// in that case we have fewer max nodes
|
|
maxNodes[i] = rand.Intn(nodeCount)
|
|
}
|
|
|
|
var sendCount int
|
|
for i := 0; i < testLength; i++ {
|
|
now := clock.Now()
|
|
for _, idx := range maxNodes {
|
|
for nodes[idx].send(t, now) {
|
|
}
|
|
}
|
|
if rand.Intn(testLength) < maxCapacityNodes*3 {
|
|
maxNodes[rand.Intn(maxCapacityNodes)] = rand.Intn(nodeCount)
|
|
}
|
|
|
|
sendCount += randomSend
|
|
failCount := randomSend * 10
|
|
for sendCount > 0 && failCount > 0 {
|
|
if nodes[rand.Intn(nodeCount)].send(t, now) {
|
|
sendCount--
|
|
} else {
|
|
failCount--
|
|
}
|
|
}
|
|
clock.Run(time.Millisecond)
|
|
}
|
|
|
|
var totalCost uint64
|
|
for _, n := range nodes {
|
|
totalCost += n.totalCost
|
|
}
|
|
ratio := float64(totalCost) / float64(totalCapacity) / testLength
|
|
if ratio < 0.98 || ratio > 1.02 {
|
|
t.Errorf("totalCost/totalCapacity/testLength ratio incorrect (expected: 1, got: %f)", ratio)
|
|
}
|
|
|
|
}
|
|
|
|
func (n *testNode) send(t *testing.T, now mclock.AbsTime) bool {
|
|
if now < n.waitUntil {
|
|
return false
|
|
}
|
|
n.index++
|
|
if ok, _, _ := n.node.AcceptRequest(0, n.index, testMaxCost); !ok {
|
|
t.Fatalf("Rejected request after expected waiting time has passed")
|
|
}
|
|
rcost := uint64(rand.Int63n(testMaxCost))
|
|
bv := n.node.RequestProcessed(0, n.index, testMaxCost, rcost)
|
|
if bv < testMaxCost {
|
|
n.waitUntil = now + mclock.AbsTime((testMaxCost-bv)*1001000/n.capacity)
|
|
}
|
|
n.totalCost += rcost
|
|
return true
|
|
}
|