diff options
Diffstat (limited to 'test-dnsdistrings_cc.cc')
| -rw-r--r-- | test-dnsdistrings_cc.cc | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/test-dnsdistrings_cc.cc b/test-dnsdistrings_cc.cc new file mode 100644 index 0000000..db665bb --- /dev/null +++ b/test-dnsdistrings_cc.cc @@ -0,0 +1,290 @@ + +#define BOOST_TEST_DYN_LINK +#define BOOST_TEST_NO_MAIN + +#include <thread> +#include <boost/test/unit_test.hpp> + +#include "dnsdist-rings.hh" +#include "gettime.hh" + +BOOST_AUTO_TEST_SUITE(dnsdistrings_cc) + +static void test_ring(size_t maxEntries, size_t numberOfShards, size_t nbLockTries) +{ + Rings rings(maxEntries, numberOfShards, nbLockTries); + size_t entriesPerShard = maxEntries / numberOfShards; + + BOOST_CHECK_EQUAL(rings.getNumberOfShards(), numberOfShards); + BOOST_CHECK_EQUAL(rings.getNumberOfQueryEntries(), 0U); + BOOST_CHECK_EQUAL(rings.getNumberOfResponseEntries(), 0U); + BOOST_CHECK_EQUAL(rings.d_shards.size(), rings.getNumberOfShards()); + for (const auto& shard : rings.d_shards) { + BOOST_CHECK(shard != nullptr); + } + + dnsheader dh; + memset(&dh, 0, sizeof(dh)); + DNSName qname("rings.powerdns.com."); + ComboAddress requestor1("192.0.2.1"); + ComboAddress requestor2("192.0.2.2"); + uint16_t qtype = QType::AAAA; + uint16_t size = 42; + dnsdist::Protocol protocol = dnsdist::Protocol::DoUDP; + dnsdist::Protocol outgoingProtocol = dnsdist::Protocol::DoUDP; + struct timespec now; + gettime(&now); + + /* fill the query ring */ + for (size_t idx = 0; idx < maxEntries; idx++) { + rings.insertQuery(now, requestor1, qname, qtype, size, dh, protocol); + } + BOOST_CHECK_EQUAL(rings.getNumberOfQueryEntries(), maxEntries); + BOOST_CHECK_EQUAL(rings.getNumberOfResponseEntries(), 0U); + for (const auto& shard : rings.d_shards) { + auto ring = shard->queryRing.lock(); + BOOST_CHECK_EQUAL(ring->size(), entriesPerShard); + for (const auto& entry : *ring) { + BOOST_CHECK_EQUAL(entry.name, qname); + BOOST_CHECK_EQUAL(entry.qtype, qtype); + BOOST_CHECK_EQUAL(entry.size, size); + BOOST_CHECK_EQUAL(entry.when.tv_sec, now.tv_sec); + BOOST_CHECK_EQUAL(entry.requestor.toStringWithPort(), requestor1.toStringWithPort()); + } + } + + /* push enough queries to get rid of the existing ones */ + for (size_t idx = 0; idx < maxEntries; idx++) { + rings.insertQuery(now, requestor2, qname, qtype, size, dh, protocol); + } + BOOST_CHECK_EQUAL(rings.getNumberOfQueryEntries(), maxEntries); + BOOST_CHECK_EQUAL(rings.getNumberOfResponseEntries(), 0U); + for (const auto& shard : rings.d_shards) { + auto ring = shard->queryRing.lock(); + BOOST_CHECK_EQUAL(ring->size(), entriesPerShard); + for (const auto& entry : *ring) { + BOOST_CHECK_EQUAL(entry.name, qname); + BOOST_CHECK_EQUAL(entry.qtype, qtype); + BOOST_CHECK_EQUAL(entry.size, size); + BOOST_CHECK_EQUAL(entry.when.tv_sec, now.tv_sec); + BOOST_CHECK_EQUAL(entry.requestor.toStringWithPort(), requestor2.toStringWithPort()); + } + } + + ComboAddress server("192.0.2.42"); + unsigned int latency = 100; + + /* fill the response ring */ + for (size_t idx = 0; idx < maxEntries; idx++) { + rings.insertResponse(now, requestor1, qname, qtype, latency, size, dh, server, outgoingProtocol); + } + BOOST_CHECK_EQUAL(rings.getNumberOfQueryEntries(), maxEntries); + BOOST_CHECK_EQUAL(rings.getNumberOfResponseEntries(), maxEntries); + for (const auto& shard : rings.d_shards) { + auto ring = shard->respRing.lock(); + BOOST_CHECK_EQUAL(ring->size(), entriesPerShard); + for (const auto& entry : *ring) { + BOOST_CHECK_EQUAL(entry.name, qname); + BOOST_CHECK_EQUAL(entry.qtype, qtype); + BOOST_CHECK_EQUAL(entry.size, size); + BOOST_CHECK_EQUAL(entry.when.tv_sec, now.tv_sec); + BOOST_CHECK_EQUAL(entry.requestor.toStringWithPort(), requestor1.toStringWithPort()); + BOOST_CHECK_EQUAL(entry.usec, latency); + BOOST_CHECK_EQUAL(entry.ds.toStringWithPort(), server.toStringWithPort()); + } + } + + /* push enough responses to get rid of the existing ones */ + for (size_t idx = 0; idx < maxEntries; idx++) { + rings.insertResponse(now, requestor2, qname, qtype, latency, size, dh, server, outgoingProtocol); + } + BOOST_CHECK_EQUAL(rings.getNumberOfQueryEntries(), maxEntries); + BOOST_CHECK_EQUAL(rings.getNumberOfResponseEntries(), maxEntries); + for (const auto& shard : rings.d_shards) { + auto ring = shard->respRing.lock(); + BOOST_CHECK_EQUAL(ring->size(), entriesPerShard); + for (const auto& entry : *ring) { + BOOST_CHECK_EQUAL(entry.name, qname); + BOOST_CHECK_EQUAL(entry.qtype, qtype); + BOOST_CHECK_EQUAL(entry.size, size); + BOOST_CHECK_EQUAL(entry.when.tv_sec, now.tv_sec); + BOOST_CHECK_EQUAL(entry.requestor.toStringWithPort(), requestor2.toStringWithPort()); + BOOST_CHECK_EQUAL(entry.usec, latency); + BOOST_CHECK_EQUAL(entry.ds.toStringWithPort(), server.toStringWithPort()); + } + } +} + + +BOOST_AUTO_TEST_CASE(test_Rings_Simple) { + + /* 5 entries over 1 shard */ + test_ring(5, 1, 0); + /* 500 entries over 10 shards */ + test_ring(500, 10, 0); + /* 5000 entries over 100 shards, max 5 try-lock attempts */ + test_ring(500, 100, 5); +} + +static void ringReaderThread(Rings& rings, std::atomic<bool>& done, size_t numberOfEntries, uint16_t qtype) +{ + size_t iterationsDone = 0; + + while (done == false) { + size_t numberOfQueries = 0; + size_t numberOfResponses = 0; + + for (const auto& shard : rings.d_shards) { + { + auto rl = shard->queryRing.lock(); + for(const auto& c : *rl) { + numberOfQueries++; + // BOOST_CHECK* is slow as hell.. + if(c.qtype != qtype) { + cerr<<"Invalid query QType!"<<endl; + return; + } + } + } + { + auto rl = shard->respRing.lock(); + for(const auto& c : *rl) { + if(c.qtype != qtype) { + cerr<<"Invalid response QType!"<<endl; + return; + } + numberOfResponses++; + } + } + } + + BOOST_CHECK_LE(numberOfQueries, numberOfEntries); + BOOST_CHECK_LE(numberOfResponses, numberOfEntries); + iterationsDone++; + usleep(10000); + } + + BOOST_CHECK_GT(iterationsDone, 1U); +#if 0 + cerr<<"Done "<<iterationsDone<<" reading iterations"<<endl; +#endif +} + +static void ringWriterThread(Rings& rings, size_t numberOfEntries, const Rings::Query& query, const Rings::Response& response) +{ + for (size_t idx = 0; idx < numberOfEntries; idx++) { + rings.insertQuery(query.when, query.requestor, query.name, query.qtype, query.size, query.dh, query.protocol); + rings.insertResponse(response.when, response.requestor, response.name, response.qtype, response.usec, response.size, response.dh, response.ds, response.protocol); + } +} + +BOOST_AUTO_TEST_CASE(test_Rings_Threaded) { + size_t numberOfEntries = 1000000; + size_t numberOfShards = 50; + size_t lockAttempts = 5; + size_t numberOfWriterThreads = 4; + size_t entriesPerShard = numberOfEntries / numberOfShards; + + struct timespec now; + gettime(&now); + dnsheader dh; + memset(&dh, 0, sizeof(dh)); + dh.id = htons(4242); + dh.qr = 0; + dh.tc = 0; + dh.rd = 0; + dh.rcode = 0; + dh.qdcount = htons(1); + DNSName qname("rings.powerdns.com."); + ComboAddress requestor("192.0.2.1"); + ComboAddress server("192.0.2.42"); + unsigned int latency = 100; + uint16_t qtype = QType::AAAA; + uint16_t size = 42; + dnsdist::Protocol protocol = dnsdist::Protocol::DoUDP; + dnsdist::Protocol outgoingProtocol = dnsdist::Protocol::DoUDP; + + Rings rings(numberOfEntries, numberOfShards, lockAttempts, true); + Rings::Query query({requestor, qname, now, dh, size, qtype, protocol}); + Rings::Response response({requestor, server, qname, now, dh, latency, size, qtype, outgoingProtocol}); + + std::atomic<bool> done(false); + std::vector<std::thread> writerThreads; + std::thread readerThread(ringReaderThread, std::ref(rings), std::ref(done), numberOfEntries, qtype); + + /* we need to overcommit a bit to account for the fact that due to contention, + we might not perfectly distribute the entries over the shards, + so some of them might get full while other still have some place left */ + size_t insertionsPerThread = (1.2 * numberOfEntries) / numberOfWriterThreads; + for (size_t idx = 0; idx < numberOfWriterThreads; idx++) { + writerThreads.push_back(std::thread(ringWriterThread, std::ref(rings), insertionsPerThread, query, response)); + } + + /* wait for the writers to be finished */ + for (auto& t : writerThreads) { + t.join(); + } + + /* we can stop the reader thread now */ + done = true; + readerThread.join(); + + BOOST_CHECK_EQUAL(rings.getNumberOfShards(), numberOfShards); + BOOST_CHECK_EQUAL(rings.d_shards.size(), rings.getNumberOfShards()); + BOOST_CHECK_LE(rings.getNumberOfQueryEntries(), numberOfEntries); + BOOST_CHECK_GT(rings.getNumberOfQueryEntries(), numberOfEntries * 0.75); + BOOST_WARN_GT(rings.getNumberOfQueryEntries(), numberOfEntries * 0.99); + BOOST_CHECK_LE(rings.getNumberOfResponseEntries(), numberOfEntries); + BOOST_CHECK_GT(rings.getNumberOfResponseEntries(), numberOfEntries * 0.75); + BOOST_WARN_GT(rings.getNumberOfResponseEntries(), numberOfEntries * 0.99); + + size_t totalQueries = 0; + size_t totalResponses = 0; + for (const auto& shard : rings.d_shards) { + { + auto ring = shard->queryRing.lock(); + BOOST_CHECK_LE(ring->size(), entriesPerShard); + // verify that the shard is not empty + BOOST_CHECK_GT(ring->size(), (entriesPerShard * 0.5) + 1); + // this would be optimal + BOOST_WARN_GT(ring->size(), entriesPerShard * 0.95); + totalQueries += ring->size(); + for (const auto& entry : *ring) { + BOOST_CHECK_EQUAL(entry.name, qname); + BOOST_CHECK_EQUAL(entry.qtype, qtype); + BOOST_CHECK_EQUAL(entry.size, size); + BOOST_CHECK_EQUAL(entry.when.tv_sec, now.tv_sec); + BOOST_CHECK_EQUAL(entry.requestor.toStringWithPort(), requestor.toStringWithPort()); + } + } + { + auto ring = shard->respRing.lock(); + BOOST_CHECK_LE(ring->size(), entriesPerShard); + // verify that the shard is not empty + BOOST_CHECK_GT(ring->size(), (entriesPerShard * 0.5) + 1); + // this would be optimal + BOOST_WARN_GT(ring->size(), entriesPerShard * 0.95); + totalResponses += ring->size(); + for (const auto& entry : *ring) { + BOOST_CHECK_EQUAL(entry.name, qname); + BOOST_CHECK_EQUAL(entry.qtype, qtype); + BOOST_CHECK_EQUAL(entry.size, size); + BOOST_CHECK_EQUAL(entry.when.tv_sec, now.tv_sec); + BOOST_CHECK_EQUAL(entry.requestor.toStringWithPort(), requestor.toStringWithPort()); + BOOST_CHECK_EQUAL(entry.usec, latency); + BOOST_CHECK_EQUAL(entry.ds.toStringWithPort(), server.toStringWithPort()); + } + } + } + BOOST_CHECK_EQUAL(rings.getNumberOfQueryEntries(), totalQueries); + BOOST_CHECK_EQUAL(rings.getNumberOfResponseEntries(), totalResponses); +#if 0 + cerr<<"Done "<<(insertionsPerThread*numberOfWriterThreads)<<" insertions"<<endl; + cerr<<"Got "<<rings.d_deferredQueryInserts<<" deferred query insertions"<<endl; + cerr<<"Got "<<rings.d_blockingQueryInserts<<" blocking query insertions"<<endl; + cerr<<"Got "<<rings.d_deferredResponseInserts<<" deferred response insertions"<<endl; + cerr<<"Got "<<rings.d_blockingResponseInserts<<" blocking response insertions"<<endl; +#endif +} + +BOOST_AUTO_TEST_SUITE_END() |