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1098 Zeilen
33 KiB
1098 Zeilen
33 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include <sys/types.h>
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#include <atomic>
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#include <cstdio>
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#include <cstdlib>
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#include "leveldb/cache.h"
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#include "leveldb/comparator.h"
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#include "leveldb/db.h"
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#include "leveldb/env.h"
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#include "leveldb/filter_policy.h"
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#include "leveldb/write_batch.h"
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#include "port/port.h"
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#include "util/crc32c.h"
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#include "util/histogram.h"
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#include "util/mutexlock.h"
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#include "util/random.h"
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#include "util/testutil.h"
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// Comma-separated list of operations to run in the specified order
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// Actual benchmarks:
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// fillseq -- write N values in sequential key order in async mode
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// fillrandom -- write N values in random key order in async mode
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// overwrite -- overwrite N values in random key order in async mode
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// fillsync -- write N/100 values in random key order in sync mode
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// fill100K -- write N/1000 100K values in random order in async mode
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// deleteseq -- delete N keys in sequential order
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// deleterandom -- delete N keys in random order
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// readseq -- read N times sequentially
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// readreverse -- read N times in reverse order
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// readrandom -- read N times in random order
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// readmissing -- read N missing keys in random order
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// readhot -- read N times in random order from 1% section of DB
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// seekrandom -- N random seeks
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// seekordered -- N ordered seeks
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// open -- cost of opening a DB
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// crc32c -- repeated crc32c of 4K of data
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// Meta operations:
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// compact -- Compact the entire DB
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// stats -- Print DB stats
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// sstables -- Print sstable info
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// heapprofile -- Dump a heap profile (if supported by this port)
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static const char* FLAGS_benchmarks =
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"fillseq,"
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"fillsync,"
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"fillrandom,"
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"overwrite,"
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"readrandom,"
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"readrandom," // Extra run to allow previous compactions to quiesce
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"readseq,"
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"readreverse,"
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"compact,"
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"readrandom,"
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"readseq,"
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"readreverse,"
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"fill100K,"
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"crc32c,"
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"snappycomp,"
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"snappyuncomp,";
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// Number of key/values to place in database
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static int FLAGS_num = 1000000;
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// Number of read operations to do. If negative, do FLAGS_num reads.
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static int FLAGS_reads = -1;
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// Number of concurrent threads to run.
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static int FLAGS_threads = 1;
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// Size of each value
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static int FLAGS_value_size = 100;
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// Arrange to generate values that shrink to this fraction of
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// their original size after compression
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static double FLAGS_compression_ratio = 0.5;
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// Print histogram of operation timings
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static bool FLAGS_histogram = false;
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// Count the number of string comparisons performed
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static bool FLAGS_comparisons = false;
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// Number of bytes to buffer in memtable before compacting
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// (initialized to default value by "main")
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static int FLAGS_write_buffer_size = 0;
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// Number of bytes written to each file.
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// (initialized to default value by "main")
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static int FLAGS_max_file_size = 0;
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// Approximate size of user data packed per block (before compression.
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// (initialized to default value by "main")
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static int FLAGS_block_size = 0;
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// Number of bytes to use as a cache of uncompressed data.
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// Negative means use default settings.
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static int FLAGS_cache_size = -1;
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// Maximum number of files to keep open at the same time (use default if == 0)
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static int FLAGS_open_files = 0;
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// Bloom filter bits per key.
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// Negative means use default settings.
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static int FLAGS_bloom_bits = -1;
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// Common key prefix length.
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static int FLAGS_key_prefix = 0;
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// If true, do not destroy the existing database. If you set this
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// flag and also specify a benchmark that wants a fresh database, that
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// benchmark will fail.
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static bool FLAGS_use_existing_db = false;
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// If true, reuse existing log/MANIFEST files when re-opening a database.
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static bool FLAGS_reuse_logs = false;
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// If true, use compression.
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static bool FLAGS_compression = true;
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// Use the db with the following name.
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static const char* FLAGS_db = nullptr;
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namespace leveldb {
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namespace {
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leveldb::Env* g_env = nullptr;
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class CountComparator : public Comparator {
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public:
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CountComparator(const Comparator* wrapped) : wrapped_(wrapped) {}
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~CountComparator() override {}
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int Compare(const Slice& a, const Slice& b) const override {
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count_.fetch_add(1, std::memory_order_relaxed);
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return wrapped_->Compare(a, b);
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}
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const char* Name() const override { return wrapped_->Name(); }
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void FindShortestSeparator(std::string* start,
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const Slice& limit) const override {
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wrapped_->FindShortestSeparator(start, limit);
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}
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void FindShortSuccessor(std::string* key) const override {
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return wrapped_->FindShortSuccessor(key);
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}
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size_t comparisons() const { return count_.load(std::memory_order_relaxed); }
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void reset() { count_.store(0, std::memory_order_relaxed); }
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private:
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mutable std::atomic<size_t> count_{0};
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const Comparator* const wrapped_;
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};
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// Helper for quickly generating random data.
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class RandomGenerator {
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private:
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std::string data_;
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int pos_;
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public:
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RandomGenerator() {
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// We use a limited amount of data over and over again and ensure
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// that it is larger than the compression window (32KB), and also
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// large enough to serve all typical value sizes we want to write.
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Random rnd(301);
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std::string piece;
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while (data_.size() < 1048576) {
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// Add a short fragment that is as compressible as specified
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// by FLAGS_compression_ratio.
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test::CompressibleString(&rnd, FLAGS_compression_ratio, 100, &piece);
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data_.append(piece);
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}
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pos_ = 0;
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}
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Slice Generate(size_t len) {
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if (pos_ + len > data_.size()) {
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pos_ = 0;
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assert(len < data_.size());
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}
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pos_ += len;
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return Slice(data_.data() + pos_ - len, len);
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}
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};
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class KeyBuffer {
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public:
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KeyBuffer() {
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assert(FLAGS_key_prefix < sizeof(buffer_));
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memset(buffer_, 'a', FLAGS_key_prefix);
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}
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KeyBuffer& operator=(KeyBuffer& other) = delete;
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KeyBuffer(KeyBuffer& other) = delete;
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void Set(int k) {
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std::snprintf(buffer_ + FLAGS_key_prefix,
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sizeof(buffer_) - FLAGS_key_prefix, "%016d", k);
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}
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Slice slice() const { return Slice(buffer_, FLAGS_key_prefix + 16); }
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private:
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char buffer_[1024];
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};
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#if defined(__linux)
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static Slice TrimSpace(Slice s) {
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size_t start = 0;
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while (start < s.size() && isspace(s[start])) {
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start++;
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}
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size_t limit = s.size();
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while (limit > start && isspace(s[limit - 1])) {
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limit--;
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}
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return Slice(s.data() + start, limit - start);
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}
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#endif
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static void AppendWithSpace(std::string* str, Slice msg) {
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if (msg.empty()) return;
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if (!str->empty()) {
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str->push_back(' ');
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}
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str->append(msg.data(), msg.size());
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}
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class Stats {
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private:
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double start_;
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double finish_;
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double seconds_;
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int done_;
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int next_report_;
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int64_t bytes_;
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double last_op_finish_;
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Histogram hist_;
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std::string message_;
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public:
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Stats() { Start(); }
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void Start() {
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next_report_ = 100;
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hist_.Clear();
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done_ = 0;
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bytes_ = 0;
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seconds_ = 0;
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message_.clear();
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start_ = finish_ = last_op_finish_ = g_env->NowMicros();
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}
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void Merge(const Stats& other) {
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hist_.Merge(other.hist_);
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done_ += other.done_;
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bytes_ += other.bytes_;
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seconds_ += other.seconds_;
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if (other.start_ < start_) start_ = other.start_;
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if (other.finish_ > finish_) finish_ = other.finish_;
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// Just keep the messages from one thread
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if (message_.empty()) message_ = other.message_;
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}
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void Stop() {
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finish_ = g_env->NowMicros();
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seconds_ = (finish_ - start_) * 1e-6;
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}
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void AddMessage(Slice msg) { AppendWithSpace(&message_, msg); }
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void FinishedSingleOp() {
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if (FLAGS_histogram) {
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double now = g_env->NowMicros();
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double micros = now - last_op_finish_;
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hist_.Add(micros);
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if (micros > 20000) {
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std::fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
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std::fflush(stderr);
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}
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last_op_finish_ = now;
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}
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done_++;
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if (done_ >= next_report_) {
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if (next_report_ < 1000)
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next_report_ += 100;
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else if (next_report_ < 5000)
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next_report_ += 500;
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else if (next_report_ < 10000)
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next_report_ += 1000;
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else if (next_report_ < 50000)
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next_report_ += 5000;
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else if (next_report_ < 100000)
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next_report_ += 10000;
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else if (next_report_ < 500000)
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next_report_ += 50000;
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else
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next_report_ += 100000;
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std::fprintf(stderr, "... finished %d ops%30s\r", done_, "");
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std::fflush(stderr);
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}
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}
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void AddBytes(int64_t n) { bytes_ += n; }
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void Report(const Slice& name) {
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// Pretend at least one op was done in case we are running a benchmark
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// that does not call FinishedSingleOp().
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if (done_ < 1) done_ = 1;
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std::string extra;
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if (bytes_ > 0) {
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// Rate is computed on actual elapsed time, not the sum of per-thread
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// elapsed times.
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double elapsed = (finish_ - start_) * 1e-6;
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char rate[100];
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std::snprintf(rate, sizeof(rate), "%6.1f MB/s",
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(bytes_ / 1048576.0) / elapsed);
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extra = rate;
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}
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AppendWithSpace(&extra, message_);
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std::fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
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name.ToString().c_str(), seconds_ * 1e6 / done_,
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(extra.empty() ? "" : " "), extra.c_str());
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if (FLAGS_histogram) {
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std::fprintf(stdout, "Microseconds per op:\n%s\n",
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hist_.ToString().c_str());
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}
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std::fflush(stdout);
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}
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};
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// State shared by all concurrent executions of the same benchmark.
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struct SharedState {
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port::Mutex mu;
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port::CondVar cv GUARDED_BY(mu);
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int total GUARDED_BY(mu);
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// Each thread goes through the following states:
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// (1) initializing
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// (2) waiting for others to be initialized
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// (3) running
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// (4) done
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int num_initialized GUARDED_BY(mu);
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int num_done GUARDED_BY(mu);
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bool start GUARDED_BY(mu);
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SharedState(int total)
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: cv(&mu), total(total), num_initialized(0), num_done(0), start(false) {}
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};
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// Per-thread state for concurrent executions of the same benchmark.
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struct ThreadState {
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int tid; // 0..n-1 when running in n threads
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Random rand; // Has different seeds for different threads
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Stats stats;
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SharedState* shared;
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ThreadState(int index, int seed) : tid(index), rand(seed), shared(nullptr) {}
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};
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} // namespace
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class Benchmark {
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private:
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Cache* cache_;
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const FilterPolicy* filter_policy_;
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DB* db_;
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int num_;
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int value_size_;
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int entries_per_batch_;
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WriteOptions write_options_;
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int reads_;
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int heap_counter_;
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CountComparator count_comparator_;
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int total_thread_count_;
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void PrintHeader() {
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const int kKeySize = 16 + FLAGS_key_prefix;
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PrintEnvironment();
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std::fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
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std::fprintf(
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stdout, "Values: %d bytes each (%d bytes after compression)\n",
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FLAGS_value_size,
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static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
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std::fprintf(stdout, "Entries: %d\n", num_);
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std::fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
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((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
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1048576.0));
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std::fprintf(
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stdout, "FileSize: %.1f MB (estimated)\n",
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(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
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1048576.0));
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PrintWarnings();
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std::fprintf(stdout, "------------------------------------------------\n");
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}
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void PrintWarnings() {
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#if defined(__GNUC__) && !defined(__OPTIMIZE__)
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std::fprintf(
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stdout,
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"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
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#endif
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#ifndef NDEBUG
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std::fprintf(
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stdout,
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"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
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#endif
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// See if snappy is working by attempting to compress a compressible string
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const char text[] = "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy";
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std::string compressed;
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if (!port::Snappy_Compress(text, sizeof(text), &compressed)) {
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std::fprintf(stdout, "WARNING: Snappy compression is not enabled\n");
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} else if (compressed.size() >= sizeof(text)) {
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std::fprintf(stdout, "WARNING: Snappy compression is not effective\n");
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}
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}
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void PrintEnvironment() {
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std::fprintf(stderr, "LevelDB: version %d.%d\n", kMajorVersion,
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kMinorVersion);
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#if defined(__linux)
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time_t now = time(nullptr);
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std::fprintf(stderr, "Date: %s",
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ctime(&now)); // ctime() adds newline
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FILE* cpuinfo = std::fopen("/proc/cpuinfo", "r");
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if (cpuinfo != nullptr) {
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char line[1000];
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int num_cpus = 0;
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std::string cpu_type;
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std::string cache_size;
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while (fgets(line, sizeof(line), cpuinfo) != nullptr) {
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const char* sep = strchr(line, ':');
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if (sep == nullptr) {
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continue;
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}
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Slice key = TrimSpace(Slice(line, sep - 1 - line));
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Slice val = TrimSpace(Slice(sep + 1));
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if (key == "model name") {
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++num_cpus;
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cpu_type = val.ToString();
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} else if (key == "cache size") {
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cache_size = val.ToString();
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}
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}
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std::fclose(cpuinfo);
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std::fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
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std::fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
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}
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#endif
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}
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public:
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Benchmark()
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: cache_(FLAGS_cache_size >= 0 ? NewLRUCache(FLAGS_cache_size) : nullptr),
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filter_policy_(FLAGS_bloom_bits >= 0
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? NewBloomFilterPolicy(FLAGS_bloom_bits)
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: nullptr),
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db_(nullptr),
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num_(FLAGS_num),
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value_size_(FLAGS_value_size),
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entries_per_batch_(1),
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reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
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heap_counter_(0),
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count_comparator_(BytewiseComparator()),
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total_thread_count_(0) {
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std::vector<std::string> files;
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g_env->GetChildren(FLAGS_db, &files);
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for (size_t i = 0; i < files.size(); i++) {
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if (Slice(files[i]).starts_with("heap-")) {
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g_env->RemoveFile(std::string(FLAGS_db) + "/" + files[i]);
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}
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}
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if (!FLAGS_use_existing_db) {
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DestroyDB(FLAGS_db, Options());
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}
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}
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~Benchmark() {
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delete db_;
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delete cache_;
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delete filter_policy_;
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}
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void Run() {
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PrintHeader();
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Open();
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const char* benchmarks = FLAGS_benchmarks;
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while (benchmarks != nullptr) {
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const char* sep = strchr(benchmarks, ',');
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Slice name;
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if (sep == nullptr) {
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name = benchmarks;
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benchmarks = nullptr;
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} else {
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name = Slice(benchmarks, sep - benchmarks);
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benchmarks = sep + 1;
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}
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// Reset parameters that may be overridden below
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num_ = FLAGS_num;
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reads_ = (FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads);
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value_size_ = FLAGS_value_size;
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entries_per_batch_ = 1;
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write_options_ = WriteOptions();
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void (Benchmark::*method)(ThreadState*) = nullptr;
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bool fresh_db = false;
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int num_threads = FLAGS_threads;
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if (name == Slice("open")) {
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method = &Benchmark::OpenBench;
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num_ /= 10000;
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if (num_ < 1) num_ = 1;
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|
} else if (name == Slice("fillseq")) {
|
|
fresh_db = true;
|
|
method = &Benchmark::WriteSeq;
|
|
} else if (name == Slice("fillbatch")) {
|
|
fresh_db = true;
|
|
entries_per_batch_ = 1000;
|
|
method = &Benchmark::WriteSeq;
|
|
} else if (name == Slice("fillrandom")) {
|
|
fresh_db = true;
|
|
method = &Benchmark::WriteRandom;
|
|
} else if (name == Slice("overwrite")) {
|
|
fresh_db = false;
|
|
method = &Benchmark::WriteRandom;
|
|
} else if (name == Slice("fillsync")) {
|
|
fresh_db = true;
|
|
num_ /= 1000;
|
|
write_options_.sync = true;
|
|
method = &Benchmark::WriteRandom;
|
|
} else if (name == Slice("fill100K")) {
|
|
fresh_db = true;
|
|
num_ /= 1000;
|
|
value_size_ = 100 * 1000;
|
|
method = &Benchmark::WriteRandom;
|
|
} else if (name == Slice("readseq")) {
|
|
method = &Benchmark::ReadSequential;
|
|
} else if (name == Slice("readreverse")) {
|
|
method = &Benchmark::ReadReverse;
|
|
} else if (name == Slice("readrandom")) {
|
|
method = &Benchmark::ReadRandom;
|
|
} else if (name == Slice("readmissing")) {
|
|
method = &Benchmark::ReadMissing;
|
|
} else if (name == Slice("seekrandom")) {
|
|
method = &Benchmark::SeekRandom;
|
|
} else if (name == Slice("seekordered")) {
|
|
method = &Benchmark::SeekOrdered;
|
|
} else if (name == Slice("readhot")) {
|
|
method = &Benchmark::ReadHot;
|
|
} else if (name == Slice("readrandomsmall")) {
|
|
reads_ /= 1000;
|
|
method = &Benchmark::ReadRandom;
|
|
} else if (name == Slice("deleteseq")) {
|
|
method = &Benchmark::DeleteSeq;
|
|
} else if (name == Slice("deleterandom")) {
|
|
method = &Benchmark::DeleteRandom;
|
|
} else if (name == Slice("readwhilewriting")) {
|
|
num_threads++; // Add extra thread for writing
|
|
method = &Benchmark::ReadWhileWriting;
|
|
} else if (name == Slice("compact")) {
|
|
method = &Benchmark::Compact;
|
|
} else if (name == Slice("crc32c")) {
|
|
method = &Benchmark::Crc32c;
|
|
} else if (name == Slice("snappycomp")) {
|
|
method = &Benchmark::SnappyCompress;
|
|
} else if (name == Slice("snappyuncomp")) {
|
|
method = &Benchmark::SnappyUncompress;
|
|
} else if (name == Slice("heapprofile")) {
|
|
HeapProfile();
|
|
} else if (name == Slice("stats")) {
|
|
PrintStats("leveldb.stats");
|
|
} else if (name == Slice("sstables")) {
|
|
PrintStats("leveldb.sstables");
|
|
} else {
|
|
if (!name.empty()) { // No error message for empty name
|
|
std::fprintf(stderr, "unknown benchmark '%s'\n",
|
|
name.ToString().c_str());
|
|
}
|
|
}
|
|
|
|
if (fresh_db) {
|
|
if (FLAGS_use_existing_db) {
|
|
std::fprintf(stdout, "%-12s : skipped (--use_existing_db is true)\n",
|
|
name.ToString().c_str());
|
|
method = nullptr;
|
|
} else {
|
|
delete db_;
|
|
db_ = nullptr;
|
|
DestroyDB(FLAGS_db, Options());
|
|
Open();
|
|
}
|
|
}
|
|
|
|
if (method != nullptr) {
|
|
RunBenchmark(num_threads, name, method);
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
struct ThreadArg {
|
|
Benchmark* bm;
|
|
SharedState* shared;
|
|
ThreadState* thread;
|
|
void (Benchmark::*method)(ThreadState*);
|
|
};
|
|
|
|
static void ThreadBody(void* v) {
|
|
ThreadArg* arg = reinterpret_cast<ThreadArg*>(v);
|
|
SharedState* shared = arg->shared;
|
|
ThreadState* thread = arg->thread;
|
|
{
|
|
MutexLock l(&shared->mu);
|
|
shared->num_initialized++;
|
|
if (shared->num_initialized >= shared->total) {
|
|
shared->cv.SignalAll();
|
|
}
|
|
while (!shared->start) {
|
|
shared->cv.Wait();
|
|
}
|
|
}
|
|
|
|
thread->stats.Start();
|
|
(arg->bm->*(arg->method))(thread);
|
|
thread->stats.Stop();
|
|
|
|
{
|
|
MutexLock l(&shared->mu);
|
|
shared->num_done++;
|
|
if (shared->num_done >= shared->total) {
|
|
shared->cv.SignalAll();
|
|
}
|
|
}
|
|
}
|
|
|
|
void RunBenchmark(int n, Slice name,
|
|
void (Benchmark::*method)(ThreadState*)) {
|
|
SharedState shared(n);
|
|
|
|
ThreadArg* arg = new ThreadArg[n];
|
|
for (int i = 0; i < n; i++) {
|
|
arg[i].bm = this;
|
|
arg[i].method = method;
|
|
arg[i].shared = &shared;
|
|
++total_thread_count_;
|
|
// Seed the thread's random state deterministically based upon thread
|
|
// creation across all benchmarks. This ensures that the seeds are unique
|
|
// but reproducible when rerunning the same set of benchmarks.
|
|
arg[i].thread = new ThreadState(i, /*seed=*/1000 + total_thread_count_);
|
|
arg[i].thread->shared = &shared;
|
|
g_env->StartThread(ThreadBody, &arg[i]);
|
|
}
|
|
|
|
shared.mu.Lock();
|
|
while (shared.num_initialized < n) {
|
|
shared.cv.Wait();
|
|
}
|
|
|
|
shared.start = true;
|
|
shared.cv.SignalAll();
|
|
while (shared.num_done < n) {
|
|
shared.cv.Wait();
|
|
}
|
|
shared.mu.Unlock();
|
|
|
|
for (int i = 1; i < n; i++) {
|
|
arg[0].thread->stats.Merge(arg[i].thread->stats);
|
|
}
|
|
arg[0].thread->stats.Report(name);
|
|
if (FLAGS_comparisons) {
|
|
fprintf(stdout, "Comparisons: %zu\n", count_comparator_.comparisons());
|
|
count_comparator_.reset();
|
|
fflush(stdout);
|
|
}
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
delete arg[i].thread;
|
|
}
|
|
delete[] arg;
|
|
}
|
|
|
|
void Crc32c(ThreadState* thread) {
|
|
// Checksum about 500MB of data total
|
|
const int size = 4096;
|
|
const char* label = "(4K per op)";
|
|
std::string data(size, 'x');
|
|
int64_t bytes = 0;
|
|
uint32_t crc = 0;
|
|
while (bytes < 500 * 1048576) {
|
|
crc = crc32c::Value(data.data(), size);
|
|
thread->stats.FinishedSingleOp();
|
|
bytes += size;
|
|
}
|
|
// Print so result is not dead
|
|
std::fprintf(stderr, "... crc=0x%x\r", static_cast<unsigned int>(crc));
|
|
|
|
thread->stats.AddBytes(bytes);
|
|
thread->stats.AddMessage(label);
|
|
}
|
|
|
|
void SnappyCompress(ThreadState* thread) {
|
|
RandomGenerator gen;
|
|
Slice input = gen.Generate(Options().block_size);
|
|
int64_t bytes = 0;
|
|
int64_t produced = 0;
|
|
bool ok = true;
|
|
std::string compressed;
|
|
while (ok && bytes < 1024 * 1048576) { // Compress 1G
|
|
ok = port::Snappy_Compress(input.data(), input.size(), &compressed);
|
|
produced += compressed.size();
|
|
bytes += input.size();
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
|
|
if (!ok) {
|
|
thread->stats.AddMessage("(snappy failure)");
|
|
} else {
|
|
char buf[100];
|
|
std::snprintf(buf, sizeof(buf), "(output: %.1f%%)",
|
|
(produced * 100.0) / bytes);
|
|
thread->stats.AddMessage(buf);
|
|
thread->stats.AddBytes(bytes);
|
|
}
|
|
}
|
|
|
|
void SnappyUncompress(ThreadState* thread) {
|
|
RandomGenerator gen;
|
|
Slice input = gen.Generate(Options().block_size);
|
|
std::string compressed;
|
|
bool ok = port::Snappy_Compress(input.data(), input.size(), &compressed);
|
|
int64_t bytes = 0;
|
|
char* uncompressed = new char[input.size()];
|
|
while (ok && bytes < 1024 * 1048576) { // Compress 1G
|
|
ok = port::Snappy_Uncompress(compressed.data(), compressed.size(),
|
|
uncompressed);
|
|
bytes += input.size();
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
delete[] uncompressed;
|
|
|
|
if (!ok) {
|
|
thread->stats.AddMessage("(snappy failure)");
|
|
} else {
|
|
thread->stats.AddBytes(bytes);
|
|
}
|
|
}
|
|
|
|
void Open() {
|
|
assert(db_ == nullptr);
|
|
Options options;
|
|
options.env = g_env;
|
|
options.create_if_missing = !FLAGS_use_existing_db;
|
|
options.block_cache = cache_;
|
|
options.write_buffer_size = FLAGS_write_buffer_size;
|
|
options.max_file_size = FLAGS_max_file_size;
|
|
options.block_size = FLAGS_block_size;
|
|
if (FLAGS_comparisons) {
|
|
options.comparator = &count_comparator_;
|
|
}
|
|
options.max_open_files = FLAGS_open_files;
|
|
options.filter_policy = filter_policy_;
|
|
options.reuse_logs = FLAGS_reuse_logs;
|
|
options.compression =
|
|
FLAGS_compression ? kSnappyCompression : kNoCompression;
|
|
Status s = DB::Open(options, FLAGS_db, &db_);
|
|
if (!s.ok()) {
|
|
std::fprintf(stderr, "open error: %s\n", s.ToString().c_str());
|
|
std::exit(1);
|
|
}
|
|
}
|
|
|
|
void OpenBench(ThreadState* thread) {
|
|
for (int i = 0; i < num_; i++) {
|
|
delete db_;
|
|
Open();
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
}
|
|
|
|
void WriteSeq(ThreadState* thread) { DoWrite(thread, true); }
|
|
|
|
void WriteRandom(ThreadState* thread) { DoWrite(thread, false); }
|
|
|
|
void DoWrite(ThreadState* thread, bool seq) {
|
|
if (num_ != FLAGS_num) {
|
|
char msg[100];
|
|
std::snprintf(msg, sizeof(msg), "(%d ops)", num_);
|
|
thread->stats.AddMessage(msg);
|
|
}
|
|
|
|
RandomGenerator gen;
|
|
WriteBatch batch;
|
|
Status s;
|
|
int64_t bytes = 0;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < num_; i += entries_per_batch_) {
|
|
batch.Clear();
|
|
for (int j = 0; j < entries_per_batch_; j++) {
|
|
const int k = seq ? i + j : thread->rand.Uniform(FLAGS_num);
|
|
key.Set(k);
|
|
batch.Put(key.slice(), gen.Generate(value_size_));
|
|
bytes += value_size_ + key.slice().size();
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
s = db_->Write(write_options_, &batch);
|
|
if (!s.ok()) {
|
|
std::fprintf(stderr, "put error: %s\n", s.ToString().c_str());
|
|
std::exit(1);
|
|
}
|
|
}
|
|
thread->stats.AddBytes(bytes);
|
|
}
|
|
|
|
void ReadSequential(ThreadState* thread) {
|
|
Iterator* iter = db_->NewIterator(ReadOptions());
|
|
int i = 0;
|
|
int64_t bytes = 0;
|
|
for (iter->SeekToFirst(); i < reads_ && iter->Valid(); iter->Next()) {
|
|
bytes += iter->key().size() + iter->value().size();
|
|
thread->stats.FinishedSingleOp();
|
|
++i;
|
|
}
|
|
delete iter;
|
|
thread->stats.AddBytes(bytes);
|
|
}
|
|
|
|
void ReadReverse(ThreadState* thread) {
|
|
Iterator* iter = db_->NewIterator(ReadOptions());
|
|
int i = 0;
|
|
int64_t bytes = 0;
|
|
for (iter->SeekToLast(); i < reads_ && iter->Valid(); iter->Prev()) {
|
|
bytes += iter->key().size() + iter->value().size();
|
|
thread->stats.FinishedSingleOp();
|
|
++i;
|
|
}
|
|
delete iter;
|
|
thread->stats.AddBytes(bytes);
|
|
}
|
|
|
|
void ReadRandom(ThreadState* thread) {
|
|
ReadOptions options;
|
|
std::string value;
|
|
int found = 0;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < reads_; i++) {
|
|
const int k = thread->rand.Uniform(FLAGS_num);
|
|
key.Set(k);
|
|
if (db_->Get(options, key.slice(), &value).ok()) {
|
|
found++;
|
|
}
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
char msg[100];
|
|
std::snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
|
|
thread->stats.AddMessage(msg);
|
|
}
|
|
|
|
void ReadMissing(ThreadState* thread) {
|
|
ReadOptions options;
|
|
std::string value;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < reads_; i++) {
|
|
const int k = thread->rand.Uniform(FLAGS_num);
|
|
key.Set(k);
|
|
Slice s = Slice(key.slice().data(), key.slice().size() - 1);
|
|
db_->Get(options, s, &value);
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
}
|
|
|
|
void ReadHot(ThreadState* thread) {
|
|
ReadOptions options;
|
|
std::string value;
|
|
const int range = (FLAGS_num + 99) / 100;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < reads_; i++) {
|
|
const int k = thread->rand.Uniform(range);
|
|
key.Set(k);
|
|
db_->Get(options, key.slice(), &value);
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
}
|
|
|
|
void SeekRandom(ThreadState* thread) {
|
|
ReadOptions options;
|
|
int found = 0;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < reads_; i++) {
|
|
Iterator* iter = db_->NewIterator(options);
|
|
const int k = thread->rand.Uniform(FLAGS_num);
|
|
key.Set(k);
|
|
iter->Seek(key.slice());
|
|
if (iter->Valid() && iter->key() == key.slice()) found++;
|
|
delete iter;
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
char msg[100];
|
|
snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
|
|
thread->stats.AddMessage(msg);
|
|
}
|
|
|
|
void SeekOrdered(ThreadState* thread) {
|
|
ReadOptions options;
|
|
Iterator* iter = db_->NewIterator(options);
|
|
int found = 0;
|
|
int k = 0;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < reads_; i++) {
|
|
k = (k + (thread->rand.Uniform(100))) % FLAGS_num;
|
|
key.Set(k);
|
|
iter->Seek(key.slice());
|
|
if (iter->Valid() && iter->key() == key.slice()) found++;
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
delete iter;
|
|
char msg[100];
|
|
std::snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
|
|
thread->stats.AddMessage(msg);
|
|
}
|
|
|
|
void DoDelete(ThreadState* thread, bool seq) {
|
|
RandomGenerator gen;
|
|
WriteBatch batch;
|
|
Status s;
|
|
KeyBuffer key;
|
|
for (int i = 0; i < num_; i += entries_per_batch_) {
|
|
batch.Clear();
|
|
for (int j = 0; j < entries_per_batch_; j++) {
|
|
const int k = seq ? i + j : (thread->rand.Uniform(FLAGS_num));
|
|
key.Set(k);
|
|
batch.Delete(key.slice());
|
|
thread->stats.FinishedSingleOp();
|
|
}
|
|
s = db_->Write(write_options_, &batch);
|
|
if (!s.ok()) {
|
|
std::fprintf(stderr, "del error: %s\n", s.ToString().c_str());
|
|
std::exit(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DeleteSeq(ThreadState* thread) { DoDelete(thread, true); }
|
|
|
|
void DeleteRandom(ThreadState* thread) { DoDelete(thread, false); }
|
|
|
|
void ReadWhileWriting(ThreadState* thread) {
|
|
if (thread->tid > 0) {
|
|
ReadRandom(thread);
|
|
} else {
|
|
// Special thread that keeps writing until other threads are done.
|
|
RandomGenerator gen;
|
|
KeyBuffer key;
|
|
while (true) {
|
|
{
|
|
MutexLock l(&thread->shared->mu);
|
|
if (thread->shared->num_done + 1 >= thread->shared->num_initialized) {
|
|
// Other threads have finished
|
|
break;
|
|
}
|
|
}
|
|
|
|
const int k = thread->rand.Uniform(FLAGS_num);
|
|
key.Set(k);
|
|
Status s =
|
|
db_->Put(write_options_, key.slice(), gen.Generate(value_size_));
|
|
if (!s.ok()) {
|
|
std::fprintf(stderr, "put error: %s\n", s.ToString().c_str());
|
|
std::exit(1);
|
|
}
|
|
}
|
|
|
|
// Do not count any of the preceding work/delay in stats.
|
|
thread->stats.Start();
|
|
}
|
|
}
|
|
|
|
void Compact(ThreadState* thread) { db_->CompactRange(nullptr, nullptr); }
|
|
|
|
void PrintStats(const char* key) {
|
|
std::string stats;
|
|
if (!db_->GetProperty(key, &stats)) {
|
|
stats = "(failed)";
|
|
}
|
|
std::fprintf(stdout, "\n%s\n", stats.c_str());
|
|
}
|
|
|
|
static void WriteToFile(void* arg, const char* buf, int n) {
|
|
reinterpret_cast<WritableFile*>(arg)->Append(Slice(buf, n));
|
|
}
|
|
|
|
void HeapProfile() {
|
|
char fname[100];
|
|
std::snprintf(fname, sizeof(fname), "%s/heap-%04d", FLAGS_db,
|
|
++heap_counter_);
|
|
WritableFile* file;
|
|
Status s = g_env->NewWritableFile(fname, &file);
|
|
if (!s.ok()) {
|
|
std::fprintf(stderr, "%s\n", s.ToString().c_str());
|
|
return;
|
|
}
|
|
bool ok = port::GetHeapProfile(WriteToFile, file);
|
|
delete file;
|
|
if (!ok) {
|
|
std::fprintf(stderr, "heap profiling not supported\n");
|
|
g_env->RemoveFile(fname);
|
|
}
|
|
}
|
|
};
|
|
|
|
} // namespace leveldb
|
|
|
|
int main(int argc, char** argv) {
|
|
FLAGS_write_buffer_size = leveldb::Options().write_buffer_size;
|
|
FLAGS_max_file_size = leveldb::Options().max_file_size;
|
|
FLAGS_block_size = leveldb::Options().block_size;
|
|
FLAGS_open_files = leveldb::Options().max_open_files;
|
|
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], "--comparisons=%d%c", &n, &junk) == 1 &&
|
|
(n == 0 || n == 1)) {
|
|
FLAGS_comparisons = n;
|
|
} else if (sscanf(argv[i], "--use_existing_db=%d%c", &n, &junk) == 1 &&
|
|
(n == 0 || n == 1)) {
|
|
FLAGS_use_existing_db = n;
|
|
} else if (sscanf(argv[i], "--reuse_logs=%d%c", &n, &junk) == 1 &&
|
|
(n == 0 || n == 1)) {
|
|
FLAGS_reuse_logs = n;
|
|
} else if (sscanf(argv[i], "--compression=%d%c", &n, &junk) == 1 &&
|
|
(n == 0 || n == 1)) {
|
|
FLAGS_compression = 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], "--threads=%d%c", &n, &junk) == 1) {
|
|
FLAGS_threads = n;
|
|
} else if (sscanf(argv[i], "--value_size=%d%c", &n, &junk) == 1) {
|
|
FLAGS_value_size = n;
|
|
} else if (sscanf(argv[i], "--write_buffer_size=%d%c", &n, &junk) == 1) {
|
|
FLAGS_write_buffer_size = n;
|
|
} else if (sscanf(argv[i], "--max_file_size=%d%c", &n, &junk) == 1) {
|
|
FLAGS_max_file_size = n;
|
|
} else if (sscanf(argv[i], "--block_size=%d%c", &n, &junk) == 1) {
|
|
FLAGS_block_size = n;
|
|
} else if (sscanf(argv[i], "--key_prefix=%d%c", &n, &junk) == 1) {
|
|
FLAGS_key_prefix = n;
|
|
} else if (sscanf(argv[i], "--cache_size=%d%c", &n, &junk) == 1) {
|
|
FLAGS_cache_size = n;
|
|
} else if (sscanf(argv[i], "--bloom_bits=%d%c", &n, &junk) == 1) {
|
|
FLAGS_bloom_bits = n;
|
|
} else if (sscanf(argv[i], "--open_files=%d%c", &n, &junk) == 1) {
|
|
FLAGS_open_files = n;
|
|
} else if (strncmp(argv[i], "--db=", 5) == 0) {
|
|
FLAGS_db = argv[i] + 5;
|
|
} else {
|
|
std::fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
|
|
std::exit(1);
|
|
}
|
|
}
|
|
|
|
leveldb::g_env = leveldb::Env::Default();
|
|
|
|
// Choose a location for the test database if none given with --db=<path>
|
|
if (FLAGS_db == nullptr) {
|
|
leveldb::g_env->GetTestDirectory(&default_db_path);
|
|
default_db_path += "/dbbench";
|
|
FLAGS_db = default_db_path.c_str();
|
|
}
|
|
|
|
leveldb::Benchmark benchmark;
|
|
benchmark.Run();
|
|
return 0;
|
|
}
|