107 lines
3.2 KiB
Go
107 lines
3.2 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package bloombits
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import (
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"bytes"
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"math/big"
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"math/rand"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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)
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// Tests that the scheduler can deduplicate and forward retrieval requests to
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// underlying fetchers and serve responses back, irrelevant of the concurrency
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// of the requesting clients or serving data fetchers.
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func TestSchedulerSingleClientSingleFetcher(t *testing.T) { testScheduler(t, 1, 1, 5000) }
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func TestSchedulerSingleClientMultiFetcher(t *testing.T) { testScheduler(t, 1, 10, 5000) }
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func TestSchedulerMultiClientSingleFetcher(t *testing.T) { testScheduler(t, 10, 1, 5000) }
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func TestSchedulerMultiClientMultiFetcher(t *testing.T) { testScheduler(t, 10, 10, 5000) }
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func testScheduler(t *testing.T, clients int, fetchers int, requests int) {
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t.Parallel()
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f := newScheduler(0)
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// Create a batch of handler goroutines that respond to bloom bit requests and
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// deliver them to the scheduler.
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var fetchPend sync.WaitGroup
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fetchPend.Add(fetchers)
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defer fetchPend.Wait()
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fetch := make(chan *request, 16)
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defer close(fetch)
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var delivered uint32
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for i := 0; i < fetchers; i++ {
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go func() {
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defer fetchPend.Done()
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for req := range fetch {
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time.Sleep(time.Duration(rand.Intn(int(100 * time.Microsecond))))
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atomic.AddUint32(&delivered, 1)
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f.deliver([]uint64{
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req.section + uint64(requests), // Non-requested data (ensure it doesn't go out of bounds)
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req.section, // Requested data
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req.section, // Duplicated data (ensure it doesn't double close anything)
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}, [][]byte{
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{},
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new(big.Int).SetUint64(req.section).Bytes(),
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new(big.Int).SetUint64(req.section).Bytes(),
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})
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}
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}()
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}
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// Start a batch of goroutines to concurrently run scheduling tasks
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quit := make(chan struct{})
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var pend sync.WaitGroup
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pend.Add(clients)
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for i := 0; i < clients; i++ {
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go func() {
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defer pend.Done()
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in := make(chan uint64, 16)
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out := make(chan []byte, 16)
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f.run(in, fetch, out, quit, &pend)
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go func() {
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for j := 0; j < requests; j++ {
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in <- uint64(j)
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}
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close(in)
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}()
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b := new(big.Int)
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for j := 0; j < requests; j++ {
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bits := <-out
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if want := b.SetUint64(uint64(j)).Bytes(); !bytes.Equal(bits, want) {
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t.Errorf("vector %d: delivered content mismatch: have %x, want %x", j, bits, want)
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}
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}
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}()
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}
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pend.Wait()
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if have := atomic.LoadUint32(&delivered); int(have) != requests {
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t.Errorf("request count mismatch: have %v, want %v", have, requests)
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}
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}
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