aboutsummaryrefslogtreecommitdiff
path: root/doc/bench/db_bench_sqlite3.cc
diff options
context:
space:
mode:
Diffstat (limited to 'doc/bench/db_bench_sqlite3.cc')
-rw-r--r--doc/bench/db_bench_sqlite3.cc718
1 files changed, 718 insertions, 0 deletions
diff --git a/doc/bench/db_bench_sqlite3.cc b/doc/bench/db_bench_sqlite3.cc
new file mode 100644
index 0000000..e63aaa8
--- /dev/null
+++ b/doc/bench/db_bench_sqlite3.cc
@@ -0,0 +1,718 @@
+// 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 <sqlite3.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
+// fillseqsync -- write N/100 values in sequential key order in sync mode
+// fillseqbatch -- batch write N values in sequential key order in async mode
+// fillrandom -- write N values in random key order in async mode
+// fillrandsync -- write N/100 values in random key order in sync mode
+// fillrandbatch -- batch write N values in sequential key order in async mode
+// overwrite -- overwrite N values in random key order in async mode
+// fillrand100K -- write N/1000 100K values in random order in async mode
+// fillseq100K -- write N/1000 100K values in sequential order in async mode
+// readseq -- read N times sequentially
+// readrandom -- read N times in random order
+// readrand100K -- read N/1000 100K values in sequential order in async mode
+static const char* FLAGS_benchmarks =
+ "fillseq,"
+ "fillseqsync,"
+ "fillseqbatch,"
+ "fillrandom,"
+ "fillrandsync,"
+ "fillrandbatch,"
+ "overwrite,"
+ "overwritebatch,"
+ "readrandom,"
+ "readseq,"
+ "fillrand100K,"
+ "fillseq100K,"
+ "readseq,"
+ "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;
+
+// Print histogram of operation timings
+static bool FLAGS_histogram = false;
+
+// Arrange to generate values that shrink to this fraction of
+// their original size after compression
+static double FLAGS_compression_ratio = 0.5;
+
+// Page size. Default 1 KB.
+static int FLAGS_page_size = 1024;
+
+// Number of pages.
+// Default cache size = FLAGS_page_size * FLAGS_num_pages = 4 MB.
+static int FLAGS_num_pages = 4096;
+
+// 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;
+
+// If true, we allow batch writes to occur
+static bool FLAGS_transaction = true;
+
+// If true, we enable Write-Ahead Logging
+static bool FLAGS_WAL_enabled = true;
+
+// Use the db with the following name.
+static const char* FLAGS_db = NULL;
+
+inline
+static void ExecErrorCheck(int status, char *err_msg) {
+ if (status != SQLITE_OK) {
+ fprintf(stderr, "SQL error: %s\n", err_msg);
+ sqlite3_free(err_msg);
+ exit(1);
+ }
+}
+
+inline
+static void StepErrorCheck(int status) {
+ if (status != SQLITE_DONE) {
+ fprintf(stderr, "SQL step error: status = %d\n", status);
+ exit(1);
+ }
+}
+
+inline
+static void ErrorCheck(int status) {
+ if (status != SQLITE_OK) {
+ fprintf(stderr, "sqlite3 error: status = %d\n", status);
+ exit(1);
+ }
+}
+
+inline
+static void WalCheckpoint(sqlite3* db_) {
+ // Flush all writes to disk
+ if (FLAGS_WAL_enabled) {
+ sqlite3_wal_checkpoint_v2(db_, NULL, SQLITE_CHECKPOINT_FULL, NULL, NULL);
+ }
+}
+
+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:
+ sqlite3* 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_;
+
+ // 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\n", FLAGS_value_size);
+ fprintf(stdout, "Entries: %d\n", num_);
+ fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
+ ((static_cast<int64_t>(kKeySize + FLAGS_value_size) * 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, "SQLite: version %s\n", SQLITE_VERSION);
+
+#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),
+ db_num_(0),
+ 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, &files);
+ if (!FLAGS_use_existing_db) {
+ for (int i = 0; i < files.size(); i++) {
+ if (Slice(files[i]).starts_with("dbbench_sqlite3")) {
+ std::string file_name(test_dir);
+ file_name += "/";
+ file_name += files[i];
+ Env::Default()->DeleteFile(file_name.c_str());
+ }
+ }
+ }
+ }
+
+ ~Benchmark() {
+ int status = sqlite3_close(db_);
+ ErrorCheck(status);
+ }
+
+ void Run() {
+ PrintHeader();
+ Open();
+
+ 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;
+ }
+
+ bytes_ = 0;
+ Start();
+
+ bool known = true;
+ bool write_sync = false;
+ if (name == Slice("fillseq")) {
+ Write(write_sync, SEQUENTIAL, FRESH, num_, FLAGS_value_size, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillseqbatch")) {
+ Write(write_sync, SEQUENTIAL, FRESH, num_, FLAGS_value_size, 1000);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillrandom")) {
+ Write(write_sync, RANDOM, FRESH, num_, FLAGS_value_size, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillrandbatch")) {
+ Write(write_sync, RANDOM, FRESH, num_, FLAGS_value_size, 1000);
+ WalCheckpoint(db_);
+ } else if (name == Slice("overwrite")) {
+ Write(write_sync, RANDOM, EXISTING, num_, FLAGS_value_size, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("overwritebatch")) {
+ Write(write_sync, RANDOM, EXISTING, num_, FLAGS_value_size, 1000);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillrandsync")) {
+ write_sync = true;
+ Write(write_sync, RANDOM, FRESH, num_ / 100, FLAGS_value_size, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillseqsync")) {
+ write_sync = true;
+ Write(write_sync, SEQUENTIAL, FRESH, num_ / 100, FLAGS_value_size, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillrand100K")) {
+ Write(write_sync, RANDOM, FRESH, num_ / 1000, 100 * 1000, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("fillseq100K")) {
+ Write(write_sync, SEQUENTIAL, FRESH, num_ / 1000, 100 * 1000, 1);
+ WalCheckpoint(db_);
+ } else if (name == Slice("readseq")) {
+ ReadSequential();
+ } else if (name == Slice("readrandom")) {
+ Read(RANDOM, 1);
+ } else if (name == Slice("readrand100K")) {
+ int n = reads_;
+ reads_ /= 1000;
+ Read(RANDOM, 1);
+ 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);
+ }
+ }
+ }
+
+ void Open() {
+ assert(db_ == NULL);
+
+ int status;
+ char file_name[100];
+ char* err_msg = NULL;
+ db_num_++;
+
+ // Open database
+ std::string tmp_dir;
+ Env::Default()->GetTestDirectory(&tmp_dir);
+ snprintf(file_name, sizeof(file_name),
+ "%s/dbbench_sqlite3-%d.db",
+ tmp_dir.c_str(),
+ db_num_);
+ status = sqlite3_open(file_name, &db_);
+ if (status) {
+ fprintf(stderr, "open error: %s\n", sqlite3_errmsg(db_));
+ exit(1);
+ }
+
+ // Change SQLite cache size
+ char cache_size[100];
+ snprintf(cache_size, sizeof(cache_size), "PRAGMA cache_size = %d",
+ FLAGS_num_pages);
+ status = sqlite3_exec(db_, cache_size, NULL, NULL, &err_msg);
+ ExecErrorCheck(status, err_msg);
+
+ // FLAGS_page_size is defaulted to 1024
+ if (FLAGS_page_size != 1024) {
+ char page_size[100];
+ snprintf(page_size, sizeof(page_size), "PRAGMA page_size = %d",
+ FLAGS_page_size);
+ status = sqlite3_exec(db_, page_size, NULL, NULL, &err_msg);
+ ExecErrorCheck(status, err_msg);
+ }
+
+ // Change journal mode to WAL if WAL enabled flag is on
+ if (FLAGS_WAL_enabled) {
+ std::string WAL_stmt = "PRAGMA journal_mode = WAL";
+
+ // LevelDB's default cache size is a combined 4 MB
+ std::string WAL_checkpoint = "PRAGMA wal_autocheckpoint = 4096";
+ status = sqlite3_exec(db_, WAL_stmt.c_str(), NULL, NULL, &err_msg);
+ ExecErrorCheck(status, err_msg);
+ status = sqlite3_exec(db_, WAL_checkpoint.c_str(), NULL, NULL, &err_msg);
+ ExecErrorCheck(status, err_msg);
+ }
+
+ // Change locking mode to exclusive and create tables/index for database
+ std::string locking_stmt = "PRAGMA locking_mode = EXCLUSIVE";
+ std::string create_stmt =
+ "CREATE TABLE test (key blob, value blob, PRIMARY KEY(key))";
+ std::string stmt_array[] = { locking_stmt, create_stmt };
+ int stmt_array_length = sizeof(stmt_array) / sizeof(std::string);
+ for (int i = 0; i < stmt_array_length; i++) {
+ status = sqlite3_exec(db_, stmt_array[i].c_str(), NULL, NULL, &err_msg);
+ ExecErrorCheck(status, err_msg);
+ }
+ }
+
+ void Write(bool write_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;
+ }
+ sqlite3_close(db_);
+ db_ = NULL;
+ Open();
+ Start();
+ }
+
+ if (num_entries != num_) {
+ char msg[100];
+ snprintf(msg, sizeof(msg), "(%d ops)", num_entries);
+ message_ = msg;
+ }
+
+ char* err_msg = NULL;
+ int status;
+
+ sqlite3_stmt *replace_stmt, *begin_trans_stmt, *end_trans_stmt;
+ std::string replace_str = "REPLACE INTO test (key, value) VALUES (?, ?)";
+ std::string begin_trans_str = "BEGIN TRANSACTION;";
+ std::string end_trans_str = "END TRANSACTION;";
+
+ // Check for synchronous flag in options
+ std::string sync_stmt = (write_sync) ? "PRAGMA synchronous = FULL" :
+ "PRAGMA synchronous = OFF";
+ status = sqlite3_exec(db_, sync_stmt.c_str(), NULL, NULL, &err_msg);
+ ExecErrorCheck(status, err_msg);
+
+ // Preparing sqlite3 statements
+ status = sqlite3_prepare_v2(db_, replace_str.c_str(), -1,
+ &replace_stmt, NULL);
+ ErrorCheck(status);
+ status = sqlite3_prepare_v2(db_, begin_trans_str.c_str(), -1,
+ &begin_trans_stmt, NULL);
+ ErrorCheck(status);
+ status = sqlite3_prepare_v2(db_, end_trans_str.c_str(), -1,
+ &end_trans_stmt, NULL);
+ ErrorCheck(status);
+
+ bool transaction = (entries_per_batch > 1);
+ for (int i = 0; i < num_entries; i += entries_per_batch) {
+ // Begin write transaction
+ if (FLAGS_transaction && transaction) {
+ status = sqlite3_step(begin_trans_stmt);
+ StepErrorCheck(status);
+ status = sqlite3_reset(begin_trans_stmt);
+ ErrorCheck(status);
+ }
+
+ // Create and execute SQL statements
+ for (int j = 0; j < entries_per_batch; j++) {
+ const char* value = gen_.Generate(value_size).data();
+
+ // Create values for key-value pair
+ const int k = (order == SEQUENTIAL) ? i + j :
+ (rand_.Next() % num_entries);
+ char key[100];
+ snprintf(key, sizeof(key), "%016d", k);
+
+ // Bind KV values into replace_stmt
+ status = sqlite3_bind_blob(replace_stmt, 1, key, 16, SQLITE_STATIC);
+ ErrorCheck(status);
+ status = sqlite3_bind_blob(replace_stmt, 2, value,
+ value_size, SQLITE_STATIC);
+ ErrorCheck(status);
+
+ // Execute replace_stmt
+ bytes_ += value_size + strlen(key);
+ status = sqlite3_step(replace_stmt);
+ StepErrorCheck(status);
+
+ // Reset SQLite statement for another use
+ status = sqlite3_clear_bindings(replace_stmt);
+ ErrorCheck(status);
+ status = sqlite3_reset(replace_stmt);
+ ErrorCheck(status);
+
+ FinishedSingleOp();
+ }
+
+ // End write transaction
+ if (FLAGS_transaction && transaction) {
+ status = sqlite3_step(end_trans_stmt);
+ StepErrorCheck(status);
+ status = sqlite3_reset(end_trans_stmt);
+ ErrorCheck(status);
+ }
+ }
+
+ status = sqlite3_finalize(replace_stmt);
+ ErrorCheck(status);
+ status = sqlite3_finalize(begin_trans_stmt);
+ ErrorCheck(status);
+ status = sqlite3_finalize(end_trans_stmt);
+ ErrorCheck(status);
+ }
+
+ void Read(Order order, int entries_per_batch) {
+ int status;
+ sqlite3_stmt *read_stmt, *begin_trans_stmt, *end_trans_stmt;
+
+ std::string read_str = "SELECT * FROM test WHERE key = ?";
+ std::string begin_trans_str = "BEGIN TRANSACTION;";
+ std::string end_trans_str = "END TRANSACTION;";
+
+ // Preparing sqlite3 statements
+ status = sqlite3_prepare_v2(db_, begin_trans_str.c_str(), -1,
+ &begin_trans_stmt, NULL);
+ ErrorCheck(status);
+ status = sqlite3_prepare_v2(db_, end_trans_str.c_str(), -1,
+ &end_trans_stmt, NULL);
+ ErrorCheck(status);
+ status = sqlite3_prepare_v2(db_, read_str.c_str(), -1, &read_stmt, NULL);
+ ErrorCheck(status);
+
+ bool transaction = (entries_per_batch > 1);
+ for (int i = 0; i < reads_; i += entries_per_batch) {
+ // Begin read transaction
+ if (FLAGS_transaction && transaction) {
+ status = sqlite3_step(begin_trans_stmt);
+ StepErrorCheck(status);
+ status = sqlite3_reset(begin_trans_stmt);
+ ErrorCheck(status);
+ }
+
+ // Create and execute SQL statements
+ for (int j = 0; j < entries_per_batch; j++) {
+ // Create key value
+ char key[100];
+ int k = (order == SEQUENTIAL) ? i + j : (rand_.Next() % reads_);
+ snprintf(key, sizeof(key), "%016d", k);
+
+ // Bind key value into read_stmt
+ status = sqlite3_bind_blob(read_stmt, 1, key, 16, SQLITE_STATIC);
+ ErrorCheck(status);
+
+ // Execute read statement
+ while ((status = sqlite3_step(read_stmt)) == SQLITE_ROW) {}
+ StepErrorCheck(status);
+
+ // Reset SQLite statement for another use
+ status = sqlite3_clear_bindings(read_stmt);
+ ErrorCheck(status);
+ status = sqlite3_reset(read_stmt);
+ ErrorCheck(status);
+ FinishedSingleOp();
+ }
+
+ // End read transaction
+ if (FLAGS_transaction && transaction) {
+ status = sqlite3_step(end_trans_stmt);
+ StepErrorCheck(status);
+ status = sqlite3_reset(end_trans_stmt);
+ ErrorCheck(status);
+ }
+ }
+
+ status = sqlite3_finalize(read_stmt);
+ ErrorCheck(status);
+ status = sqlite3_finalize(begin_trans_stmt);
+ ErrorCheck(status);
+ status = sqlite3_finalize(end_trans_stmt);
+ ErrorCheck(status);
+ }
+
+ void ReadSequential() {
+ int status;
+ sqlite3_stmt *pStmt;
+ std::string read_str = "SELECT * FROM test ORDER BY key";
+
+ status = sqlite3_prepare_v2(db_, read_str.c_str(), -1, &pStmt, NULL);
+ ErrorCheck(status);
+ for (int i = 0; i < reads_ && SQLITE_ROW == sqlite3_step(pStmt); i++) {
+ bytes_ += sqlite3_column_bytes(pStmt, 1) + sqlite3_column_bytes(pStmt, 2);
+ FinishedSingleOp();
+ }
+
+ status = sqlite3_finalize(pStmt);
+ ErrorCheck(status);
+ }
+
+};
+
+} // 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], "--histogram=%d%c", &n, &junk) == 1 &&
+ (n == 0 || n == 1)) {
+ FLAGS_histogram = n;
+ } else if (sscanf(argv[i], "--compression_ratio=%lf%c", &d, &junk) == 1) {
+ FLAGS_compression_ratio = d;
+ } 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], "--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 (leveldb::Slice(argv[i]) == leveldb::Slice("--no_transaction")) {
+ FLAGS_transaction = false;
+ } else if (sscanf(argv[i], "--page_size=%d%c", &n, &junk) == 1) {
+ FLAGS_page_size = n;
+ } else if (sscanf(argv[i], "--num_pages=%d%c", &n, &junk) == 1) {
+ FLAGS_num_pages = n;
+ } else if (sscanf(argv[i], "--WAL_enabled=%d%c", &n, &junk) == 1 &&
+ (n == 0 || n == 1)) {
+ FLAGS_WAL_enabled = n;
+ } 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-13 03:21:41 +0000