287 lines
11 KiB
Go
287 lines
11 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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"context"
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"math/rand"
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"sync/atomic"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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)
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const testSectionSize = 4096
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// Tests that wildcard filter rules (nil) can be specified and are handled well.
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func TestMatcherWildcards(t *testing.T) {
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matcher := NewMatcher(testSectionSize, [][][]byte{
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{common.Address{}.Bytes(), common.Address{0x01}.Bytes()}, // Default address is not a wildcard
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{common.Hash{}.Bytes(), common.Hash{0x01}.Bytes()}, // Default hash is not a wildcard
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{common.Hash{0x01}.Bytes()}, // Plain rule, sanity check
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{common.Hash{0x01}.Bytes(), nil}, // Wildcard suffix, drop rule
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{nil, common.Hash{0x01}.Bytes()}, // Wildcard prefix, drop rule
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{nil, nil}, // Wildcard combo, drop rule
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{}, // Inited wildcard rule, drop rule
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nil, // Proper wildcard rule, drop rule
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})
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if len(matcher.filters) != 3 {
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t.Fatalf("filter system size mismatch: have %d, want %d", len(matcher.filters), 3)
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}
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if len(matcher.filters[0]) != 2 {
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t.Fatalf("address clause size mismatch: have %d, want %d", len(matcher.filters[0]), 2)
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}
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if len(matcher.filters[1]) != 2 {
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t.Fatalf("combo topic clause size mismatch: have %d, want %d", len(matcher.filters[1]), 2)
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}
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if len(matcher.filters[2]) != 1 {
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t.Fatalf("singletone topic clause size mismatch: have %d, want %d", len(matcher.filters[2]), 1)
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}
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}
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// Tests the matcher pipeline on a single continuous workflow without interrupts.
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func TestMatcherContinuous(t *testing.T) {
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testMatcherDiffBatches(t, [][]bloomIndexes{{{10, 20, 30}}}, 0, 100000, false, 75)
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testMatcherDiffBatches(t, [][]bloomIndexes{{{32, 3125, 100}}, {{40, 50, 10}}}, 0, 100000, false, 81)
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testMatcherDiffBatches(t, [][]bloomIndexes{{{4, 8, 11}, {7, 8, 17}}, {{9, 9, 12}, {15, 20, 13}}, {{18, 15, 15}, {12, 10, 4}}}, 0, 10000, false, 36)
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}
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// Tests the matcher pipeline on a constantly interrupted and resumed work pattern
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// with the aim of ensuring data items are requested only once.
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func TestMatcherIntermittent(t *testing.T) {
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testMatcherDiffBatches(t, [][]bloomIndexes{{{10, 20, 30}}}, 0, 100000, true, 75)
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testMatcherDiffBatches(t, [][]bloomIndexes{{{32, 3125, 100}}, {{40, 50, 10}}}, 0, 100000, true, 81)
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testMatcherDiffBatches(t, [][]bloomIndexes{{{4, 8, 11}, {7, 8, 17}}, {{9, 9, 12}, {15, 20, 13}}, {{18, 15, 15}, {12, 10, 4}}}, 0, 10000, true, 36)
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}
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// Tests the matcher pipeline on random input to hopefully catch anomalies.
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func TestMatcherRandom(t *testing.T) {
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for i := 0; i < 10; i++ {
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testMatcherBothModes(t, makeRandomIndexes([]int{1}, 50), 0, 10000, 0)
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testMatcherBothModes(t, makeRandomIndexes([]int{3}, 50), 0, 10000, 0)
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testMatcherBothModes(t, makeRandomIndexes([]int{2, 2, 2}, 20), 0, 10000, 0)
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testMatcherBothModes(t, makeRandomIndexes([]int{5, 5, 5}, 50), 0, 10000, 0)
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testMatcherBothModes(t, makeRandomIndexes([]int{4, 4, 4}, 20), 0, 10000, 0)
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}
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}
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// Tests that the matcher can properly find matches if the starting block is
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// shifter from a multiple of 8. This is needed to cover an optimisation with
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// bitset matching https://github.com/ethereum/go-ethereum/issues/15309.
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func TestMatcherShifted(t *testing.T) {
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// Block 0 always matches in the tests, skip ahead of first 8 blocks with the
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// start to get a potential zero byte in the matcher bitset.
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// To keep the second bitset byte zero, the filter must only match for the first
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// time in block 16, so doing an all-16 bit filter should suffice.
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// To keep the starting block non divisible by 8, block number 9 is the first
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// that would introduce a shift and not match block 0.
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testMatcherBothModes(t, [][]bloomIndexes{{{16, 16, 16}}}, 9, 64, 0)
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}
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// Tests that matching on everything doesn't crash (special case internally).
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func TestWildcardMatcher(t *testing.T) {
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testMatcherBothModes(t, nil, 0, 10000, 0)
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}
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// makeRandomIndexes generates a random filter system, composed on multiple filter
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// criteria, each having one bloom list component for the address and arbitrarily
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// many topic bloom list components.
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func makeRandomIndexes(lengths []int, max int) [][]bloomIndexes {
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res := make([][]bloomIndexes, len(lengths))
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for i, topics := range lengths {
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res[i] = make([]bloomIndexes, topics)
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for j := 0; j < topics; j++ {
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for k := 0; k < len(res[i][j]); k++ {
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res[i][j][k] = uint(rand.Intn(max-1) + 2)
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}
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}
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}
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return res
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}
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// testMatcherDiffBatches runs the given matches test in single-delivery and also
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// in batches delivery mode, verifying that all kinds of deliveries are handled
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// correctly withn.
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func testMatcherDiffBatches(t *testing.T, filter [][]bloomIndexes, start, blocks uint64, intermittent bool, retrievals uint32) {
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singleton := testMatcher(t, filter, start, blocks, intermittent, retrievals, 1)
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batched := testMatcher(t, filter, start, blocks, intermittent, retrievals, 16)
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if singleton != batched {
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t.Errorf("filter = %v blocks = %v intermittent = %v: request count mismatch, %v in signleton vs. %v in batched mode", filter, blocks, intermittent, singleton, batched)
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}
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}
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// testMatcherBothModes runs the given matcher test in both continuous as well as
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// in intermittent mode, verifying that the request counts match each other.
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func testMatcherBothModes(t *testing.T, filter [][]bloomIndexes, start, blocks uint64, retrievals uint32) {
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continuous := testMatcher(t, filter, start, blocks, false, retrievals, 16)
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intermittent := testMatcher(t, filter, start, blocks, true, retrievals, 16)
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if continuous != intermittent {
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t.Errorf("filter = %v blocks = %v: request count mismatch, %v in continuous vs. %v in intermittent mode", filter, blocks, continuous, intermittent)
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}
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}
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// testMatcher is a generic tester to run the given matcher test and return the
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// number of requests made for cross validation between different modes.
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func testMatcher(t *testing.T, filter [][]bloomIndexes, start, blocks uint64, intermittent bool, retrievals uint32, maxReqCount int) uint32 {
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// Create a new matcher an simulate our explicit random bitsets
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matcher := NewMatcher(testSectionSize, nil)
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matcher.filters = filter
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for _, rule := range filter {
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for _, topic := range rule {
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for _, bit := range topic {
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matcher.addScheduler(bit)
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}
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}
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}
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// Track the number of retrieval requests made
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var requested uint32
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// Start the matching session for the filter and the retriever goroutines
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quit := make(chan struct{})
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matches := make(chan uint64, 16)
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session, err := matcher.Start(context.Background(), start, blocks-1, matches)
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if err != nil {
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t.Fatalf("failed to stat matcher session: %v", err)
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}
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startRetrievers(session, quit, &requested, maxReqCount)
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// Iterate over all the blocks and verify that the pipeline produces the correct matches
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for i := start; i < blocks; i++ {
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if expMatch3(filter, i) {
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match, ok := <-matches
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if !ok {
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t.Errorf("filter = %v blocks = %v intermittent = %v: expected #%v, results channel closed", filter, blocks, intermittent, i)
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return 0
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}
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if match != i {
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t.Errorf("filter = %v blocks = %v intermittent = %v: expected #%v, got #%v", filter, blocks, intermittent, i, match)
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}
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// If we're testing intermittent mode, abort and restart the pipeline
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if intermittent {
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session.Close()
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close(quit)
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quit = make(chan struct{})
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matches = make(chan uint64, 16)
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session, err = matcher.Start(context.Background(), i+1, blocks-1, matches)
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if err != nil {
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t.Fatalf("failed to stat matcher session: %v", err)
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}
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startRetrievers(session, quit, &requested, maxReqCount)
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}
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}
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}
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// Ensure the result channel is torn down after the last block
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match, ok := <-matches
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if ok {
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t.Errorf("filter = %v blocks = %v intermittent = %v: expected closed channel, got #%v", filter, blocks, intermittent, match)
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}
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// Clean up the session and ensure we match the expected retrieval count
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session.Close()
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close(quit)
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if retrievals != 0 && requested != retrievals {
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t.Errorf("filter = %v blocks = %v intermittent = %v: request count mismatch, have #%v, want #%v", filter, blocks, intermittent, requested, retrievals)
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}
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return requested
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}
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// startRetrievers starts a batch of goroutines listening for section requests
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// and serving them.
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func startRetrievers(session *MatcherSession, quit chan struct{}, retrievals *uint32, batch int) {
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requests := make(chan chan *Retrieval)
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for i := 0; i < 10; i++ {
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// Start a multiplexer to test multiple threaded execution
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go session.Multiplex(batch, 100*time.Microsecond, requests)
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// Start a services to match the above multiplexer
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go func() {
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for {
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// Wait for a service request or a shutdown
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select {
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case <-quit:
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return
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case request := <-requests:
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task := <-request
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task.Bitsets = make([][]byte, len(task.Sections))
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for i, section := range task.Sections {
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if rand.Int()%4 != 0 { // Handle occasional missing deliveries
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task.Bitsets[i] = generateBitset(task.Bit, section)
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atomic.AddUint32(retrievals, 1)
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}
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}
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request <- task
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}
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}
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}()
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}
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}
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// generateBitset generates the rotated bitset for the given bloom bit and section
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// numbers.
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func generateBitset(bit uint, section uint64) []byte {
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bitset := make([]byte, testSectionSize/8)
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for i := 0; i < len(bitset); i++ {
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for b := 0; b < 8; b++ {
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blockIdx := section*testSectionSize + uint64(i*8+b)
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bitset[i] += bitset[i]
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if (blockIdx % uint64(bit)) == 0 {
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bitset[i]++
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}
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}
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}
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return bitset
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}
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func expMatch1(filter bloomIndexes, i uint64) bool {
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for _, ii := range filter {
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if (i % uint64(ii)) != 0 {
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return false
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}
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}
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return true
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}
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func expMatch2(filter []bloomIndexes, i uint64) bool {
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for _, ii := range filter {
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if expMatch1(ii, i) {
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return true
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}
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}
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return false
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}
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func expMatch3(filter [][]bloomIndexes, i uint64) bool {
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for _, ii := range filter {
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if !expMatch2(ii, i) {
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return false
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}
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}
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return true
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}
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