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author | Mike Hearn <hearn@google.com> | 2012-06-25 11:17:22 +0200 |
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committer | Pieter Wuille <pieter.wuille@gmail.com> | 2012-10-20 23:08:56 +0200 |
commit | 5e650d6d2dbfc284c300668e71188e663d8f0a45 (patch) | |
tree | bef5ac4e7bfa9845b23ea975be58fa3fe108ef4b /src/leveldb/doc/bench/db_bench_tree_db.cc | |
parent | 38ac953b9df1f7a884c1ef0e94301e14c4e7477d (diff) | |
download | bitcoin-5e650d6d2dbfc284c300668e71188e663d8f0a45.tar.xz |
Import LevelDB 1.5, it will be used for the transaction database.
Diffstat (limited to 'src/leveldb/doc/bench/db_bench_tree_db.cc')
-rw-r--r-- | src/leveldb/doc/bench/db_bench_tree_db.cc | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/src/leveldb/doc/bench/db_bench_tree_db.cc b/src/leveldb/doc/bench/db_bench_tree_db.cc new file mode 100644 index 0000000000..ed86f031c2 --- /dev/null +++ b/src/leveldb/doc/bench/db_bench_tree_db.cc @@ -0,0 +1,528 @@ +// Copyright (c) 2011 The LevelDB Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. See the AUTHORS file for names of contributors. + +#include <stdio.h> +#include <stdlib.h> +#include <kcpolydb.h> +#include "util/histogram.h" +#include "util/random.h" +#include "util/testutil.h" + +// Comma-separated list of operations to run in the specified order +// Actual benchmarks: +// +// fillseq -- write N values in sequential key order in async mode +// fillrandom -- write N values in random key order in async mode +// overwrite -- overwrite N values in random key order in async mode +// fillseqsync -- write N/100 values in sequential key order in sync mode +// fillrandsync -- write N/100 values in random key order in sync mode +// fillrand100K -- write N/1000 100K values in random order in async mode +// fillseq100K -- write N/1000 100K values in seq order in async mode +// readseq -- read N times sequentially +// readseq100K -- read N/1000 100K values in sequential order in async mode +// readrand100K -- read N/1000 100K values in sequential order in async mode +// readrandom -- read N times in random order +static const char* FLAGS_benchmarks = + "fillseq," + "fillseqsync," + "fillrandsync," + "fillrandom," + "overwrite," + "readrandom," + "readseq," + "fillrand100K," + "fillseq100K," + "readseq100K," + "readrand100K," + ; + +// Number of key/values to place in database +static int FLAGS_num = 1000000; + +// Number of read operations to do. If negative, do FLAGS_num reads. +static int FLAGS_reads = -1; + +// Size of each value +static int FLAGS_value_size = 100; + +// Arrange to generate values that shrink to this fraction of +// their original size after compression +static double FLAGS_compression_ratio = 0.5; + +// Print histogram of operation timings +static bool FLAGS_histogram = false; + +// Cache size. Default 4 MB +static int FLAGS_cache_size = 4194304; + +// Page size. Default 1 KB +static int FLAGS_page_size = 1024; + +// If true, do not destroy the existing database. If you set this +// flag and also specify a benchmark that wants a fresh database, that +// benchmark will fail. +static bool FLAGS_use_existing_db = false; + +// Compression flag. If true, compression is on. If false, compression +// is off. +static bool FLAGS_compression = true; + +// Use the db with the following name. +static const char* FLAGS_db = NULL; + +inline +static void DBSynchronize(kyotocabinet::TreeDB* db_) +{ + // Synchronize will flush writes to disk + if (!db_->synchronize()) { + fprintf(stderr, "synchronize error: %s\n", db_->error().name()); + } +} + +namespace leveldb { + +// Helper for quickly generating random data. +namespace { +class RandomGenerator { + private: + std::string data_; + int pos_; + + public: + RandomGenerator() { + // We use a limited amount of data over and over again and ensure + // that it is larger than the compression window (32KB), and also + // large enough to serve all typical value sizes we want to write. + Random rnd(301); + std::string piece; + while (data_.size() < 1048576) { + // Add a short fragment that is as compressible as specified + // by FLAGS_compression_ratio. + test::CompressibleString(&rnd, FLAGS_compression_ratio, 100, &piece); + data_.append(piece); + } + pos_ = 0; + } + + Slice Generate(int len) { + if (pos_ + len > data_.size()) { + pos_ = 0; + assert(len < data_.size()); + } + pos_ += len; + return Slice(data_.data() + pos_ - len, len); + } +}; + +static Slice TrimSpace(Slice s) { + int start = 0; + while (start < s.size() && isspace(s[start])) { + start++; + } + int limit = s.size(); + while (limit > start && isspace(s[limit-1])) { + limit--; + } + return Slice(s.data() + start, limit - start); +} + +} // namespace + +class Benchmark { + private: + kyotocabinet::TreeDB* db_; + int db_num_; + int num_; + int reads_; + double start_; + double last_op_finish_; + int64_t bytes_; + std::string message_; + Histogram hist_; + RandomGenerator gen_; + Random rand_; + kyotocabinet::LZOCompressor<kyotocabinet::LZO::RAW> comp_; + + // State kept for progress messages + int done_; + int next_report_; // When to report next + + void PrintHeader() { + const int kKeySize = 16; + PrintEnvironment(); + fprintf(stdout, "Keys: %d bytes each\n", kKeySize); + fprintf(stdout, "Values: %d bytes each (%d bytes after compression)\n", + FLAGS_value_size, + static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5)); + fprintf(stdout, "Entries: %d\n", num_); + fprintf(stdout, "RawSize: %.1f MB (estimated)\n", + ((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) + / 1048576.0)); + fprintf(stdout, "FileSize: %.1f MB (estimated)\n", + (((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) + / 1048576.0)); + PrintWarnings(); + fprintf(stdout, "------------------------------------------------\n"); + } + + void PrintWarnings() { +#if defined(__GNUC__) && !defined(__OPTIMIZE__) + fprintf(stdout, + "WARNING: Optimization is disabled: benchmarks unnecessarily slow\n" + ); +#endif +#ifndef NDEBUG + fprintf(stdout, + "WARNING: Assertions are enabled; benchmarks unnecessarily slow\n"); +#endif + } + + void PrintEnvironment() { + fprintf(stderr, "Kyoto Cabinet: version %s, lib ver %d, lib rev %d\n", + kyotocabinet::VERSION, kyotocabinet::LIBVER, kyotocabinet::LIBREV); + +#if defined(__linux) + time_t now = time(NULL); + fprintf(stderr, "Date: %s", ctime(&now)); // ctime() adds newline + + FILE* cpuinfo = fopen("/proc/cpuinfo", "r"); + if (cpuinfo != NULL) { + char line[1000]; + int num_cpus = 0; + std::string cpu_type; + std::string cache_size; + while (fgets(line, sizeof(line), cpuinfo) != NULL) { + const char* sep = strchr(line, ':'); + if (sep == NULL) { + continue; + } + Slice key = TrimSpace(Slice(line, sep - 1 - line)); + Slice val = TrimSpace(Slice(sep + 1)); + if (key == "model name") { + ++num_cpus; + cpu_type = val.ToString(); + } else if (key == "cache size") { + cache_size = val.ToString(); + } + } + fclose(cpuinfo); + fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str()); + fprintf(stderr, "CPUCache: %s\n", cache_size.c_str()); + } +#endif + } + + void Start() { + start_ = Env::Default()->NowMicros() * 1e-6; + bytes_ = 0; + message_.clear(); + last_op_finish_ = start_; + hist_.Clear(); + done_ = 0; + next_report_ = 100; + } + + void FinishedSingleOp() { + if (FLAGS_histogram) { + double now = Env::Default()->NowMicros() * 1e-6; + double micros = (now - last_op_finish_) * 1e6; + hist_.Add(micros); + if (micros > 20000) { + fprintf(stderr, "long op: %.1f micros%30s\r", micros, ""); + fflush(stderr); + } + last_op_finish_ = now; + } + + done_++; + if (done_ >= next_report_) { + if (next_report_ < 1000) next_report_ += 100; + else if (next_report_ < 5000) next_report_ += 500; + else if (next_report_ < 10000) next_report_ += 1000; + else if (next_report_ < 50000) next_report_ += 5000; + else if (next_report_ < 100000) next_report_ += 10000; + else if (next_report_ < 500000) next_report_ += 50000; + else next_report_ += 100000; + fprintf(stderr, "... finished %d ops%30s\r", done_, ""); + fflush(stderr); + } + } + + void Stop(const Slice& name) { + double finish = Env::Default()->NowMicros() * 1e-6; + + // Pretend at least one op was done in case we are running a benchmark + // that does not call FinishedSingleOp(). + if (done_ < 1) done_ = 1; + + if (bytes_ > 0) { + char rate[100]; + snprintf(rate, sizeof(rate), "%6.1f MB/s", + (bytes_ / 1048576.0) / (finish - start_)); + if (!message_.empty()) { + message_ = std::string(rate) + " " + message_; + } else { + message_ = rate; + } + } + + fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", + name.ToString().c_str(), + (finish - start_) * 1e6 / done_, + (message_.empty() ? "" : " "), + message_.c_str()); + if (FLAGS_histogram) { + fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str()); + } + fflush(stdout); + } + + public: + enum Order { + SEQUENTIAL, + RANDOM + }; + enum DBState { + FRESH, + EXISTING + }; + + Benchmark() + : db_(NULL), + num_(FLAGS_num), + reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads), + bytes_(0), + rand_(301) { + std::vector<std::string> files; + std::string test_dir; + Env::Default()->GetTestDirectory(&test_dir); + Env::Default()->GetChildren(test_dir.c_str(), &files); + if (!FLAGS_use_existing_db) { + for (int i = 0; i < files.size(); i++) { + if (Slice(files[i]).starts_with("dbbench_polyDB")) { + std::string file_name(test_dir); + file_name += "/"; + file_name += files[i]; + Env::Default()->DeleteFile(file_name.c_str()); + } + } + } + } + + ~Benchmark() { + if (!db_->close()) { + fprintf(stderr, "close error: %s\n", db_->error().name()); + } + } + + void Run() { + PrintHeader(); + Open(false); + + const char* benchmarks = FLAGS_benchmarks; + while (benchmarks != NULL) { + const char* sep = strchr(benchmarks, ','); + Slice name; + if (sep == NULL) { + name = benchmarks; + benchmarks = NULL; + } else { + name = Slice(benchmarks, sep - benchmarks); + benchmarks = sep + 1; + } + + Start(); + + bool known = true; + bool write_sync = false; + if (name == Slice("fillseq")) { + Write(write_sync, SEQUENTIAL, FRESH, num_, FLAGS_value_size, 1); + + } else if (name == Slice("fillrandom")) { + Write(write_sync, RANDOM, FRESH, num_, FLAGS_value_size, 1); + DBSynchronize(db_); + } else if (name == Slice("overwrite")) { + Write(write_sync, RANDOM, EXISTING, num_, FLAGS_value_size, 1); + DBSynchronize(db_); + } else if (name == Slice("fillrandsync")) { + write_sync = true; + Write(write_sync, RANDOM, FRESH, num_ / 100, FLAGS_value_size, 1); + DBSynchronize(db_); + } else if (name == Slice("fillseqsync")) { + write_sync = true; + Write(write_sync, SEQUENTIAL, FRESH, num_ / 100, FLAGS_value_size, 1); + DBSynchronize(db_); + } else if (name == Slice("fillrand100K")) { + Write(write_sync, RANDOM, FRESH, num_ / 1000, 100 * 1000, 1); + DBSynchronize(db_); + } else if (name == Slice("fillseq100K")) { + Write(write_sync, SEQUENTIAL, FRESH, num_ / 1000, 100 * 1000, 1); + DBSynchronize(db_); + } else if (name == Slice("readseq")) { + ReadSequential(); + } else if (name == Slice("readrandom")) { + ReadRandom(); + } else if (name == Slice("readrand100K")) { + int n = reads_; + reads_ /= 1000; + ReadRandom(); + reads_ = n; + } else if (name == Slice("readseq100K")) { + int n = reads_; + reads_ /= 1000; + ReadSequential(); + reads_ = n; + } else { + known = false; + if (name != Slice()) { // No error message for empty name + fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str()); + } + } + if (known) { + Stop(name); + } + } + } + + private: + void Open(bool sync) { + assert(db_ == NULL); + + // Initialize db_ + db_ = new kyotocabinet::TreeDB(); + char file_name[100]; + db_num_++; + std::string test_dir; + Env::Default()->GetTestDirectory(&test_dir); + snprintf(file_name, sizeof(file_name), + "%s/dbbench_polyDB-%d.kct", + test_dir.c_str(), + db_num_); + + // Create tuning options and open the database + int open_options = kyotocabinet::PolyDB::OWRITER | + kyotocabinet::PolyDB::OCREATE; + int tune_options = kyotocabinet::TreeDB::TSMALL | + kyotocabinet::TreeDB::TLINEAR; + if (FLAGS_compression) { + tune_options |= kyotocabinet::TreeDB::TCOMPRESS; + db_->tune_compressor(&comp_); + } + db_->tune_options(tune_options); + db_->tune_page_cache(FLAGS_cache_size); + db_->tune_page(FLAGS_page_size); + db_->tune_map(256LL<<20); + if (sync) { + open_options |= kyotocabinet::PolyDB::OAUTOSYNC; + } + if (!db_->open(file_name, open_options)) { + fprintf(stderr, "open error: %s\n", db_->error().name()); + } + } + + void Write(bool sync, Order order, DBState state, + int num_entries, int value_size, int entries_per_batch) { + // Create new database if state == FRESH + if (state == FRESH) { + if (FLAGS_use_existing_db) { + message_ = "skipping (--use_existing_db is true)"; + return; + } + delete db_; + db_ = NULL; + Open(sync); + Start(); // Do not count time taken to destroy/open + } + + if (num_entries != num_) { + char msg[100]; + snprintf(msg, sizeof(msg), "(%d ops)", num_entries); + message_ = msg; + } + + // Write to database + for (int i = 0; i < num_entries; i++) + { + const int k = (order == SEQUENTIAL) ? i : (rand_.Next() % num_entries); + char key[100]; + snprintf(key, sizeof(key), "%016d", k); + bytes_ += value_size + strlen(key); + std::string cpp_key = key; + if (!db_->set(cpp_key, gen_.Generate(value_size).ToString())) { + fprintf(stderr, "set error: %s\n", db_->error().name()); + } + FinishedSingleOp(); + } + } + + void ReadSequential() { + kyotocabinet::DB::Cursor* cur = db_->cursor(); + cur->jump(); + std::string ckey, cvalue; + while (cur->get(&ckey, &cvalue, true)) { + bytes_ += ckey.size() + cvalue.size(); + FinishedSingleOp(); + } + delete cur; + } + + void ReadRandom() { + std::string value; + for (int i = 0; i < reads_; i++) { + char key[100]; + const int k = rand_.Next() % reads_; + snprintf(key, sizeof(key), "%016d", k); + db_->get(key, &value); + FinishedSingleOp(); + } + } +}; + +} // namespace leveldb + +int main(int argc, char** argv) { + std::string default_db_path; + for (int i = 1; i < argc; i++) { + double d; + int n; + char junk; + if (leveldb::Slice(argv[i]).starts_with("--benchmarks=")) { + FLAGS_benchmarks = argv[i] + strlen("--benchmarks="); + } else if (sscanf(argv[i], "--compression_ratio=%lf%c", &d, &junk) == 1) { + FLAGS_compression_ratio = d; + } else if (sscanf(argv[i], "--histogram=%d%c", &n, &junk) == 1 && + (n == 0 || n == 1)) { + FLAGS_histogram = n; + } else if (sscanf(argv[i], "--num=%d%c", &n, &junk) == 1) { + FLAGS_num = n; + } else if (sscanf(argv[i], "--reads=%d%c", &n, &junk) == 1) { + FLAGS_reads = n; + } else if (sscanf(argv[i], "--value_size=%d%c", &n, &junk) == 1) { + FLAGS_value_size = n; + } else if (sscanf(argv[i], "--cache_size=%d%c", &n, &junk) == 1) { + FLAGS_cache_size = n; + } else if (sscanf(argv[i], "--page_size=%d%c", &n, &junk) == 1) { + FLAGS_page_size = n; + } else if (sscanf(argv[i], "--compression=%d%c", &n, &junk) == 1 && + (n == 0 || n == 1)) { + FLAGS_compression = (n == 1) ? true : false; + } else if (strncmp(argv[i], "--db=", 5) == 0) { + FLAGS_db = argv[i] + 5; + } else { + fprintf(stderr, "Invalid flag '%s'\n", argv[i]); + exit(1); + } + } + + // Choose a location for the test database if none given with --db=<path> + if (FLAGS_db == NULL) { + leveldb::Env::Default()->GetTestDirectory(&default_db_path); + default_db_path += "/dbbench"; + FLAGS_db = default_db_path.c_str(); + } + + leveldb::Benchmark benchmark; + benchmark.Run(); + return 0; +} |