mirror of https://github.com/facebook/rocksdb.git
129 lines
4.2 KiB
C++
129 lines
4.2 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#ifndef ROCKSDB_LITE
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#ifdef GFLAGS
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#include "tools/io_tracer_parser_tool.h"
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#include <cinttypes>
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#include <cstdio>
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#include <iomanip>
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#include <memory>
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#include <sstream>
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#include "port/lang.h"
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#include "rocksdb/trace_reader_writer.h"
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#include "trace_replay/io_tracer.h"
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#include "util/gflags_compat.h"
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using GFLAGS_NAMESPACE::ParseCommandLineFlags;
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DEFINE_string(io_trace_file, "", "The IO trace file path.");
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namespace ROCKSDB_NAMESPACE {
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IOTraceRecordParser::IOTraceRecordParser(const std::string& input_file)
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: input_file_(input_file) {}
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void IOTraceRecordParser::PrintHumanReadableHeader(
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const IOTraceHeader& header) {
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std::stringstream ss;
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ss << "Start Time: " << header.start_time
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<< "\nRocksDB Major Version: " << header.rocksdb_major_version
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<< "\nRocksDB Minor Version: " << header.rocksdb_minor_version << "\n";
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fprintf(stdout, "%s", ss.str().c_str());
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}
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void IOTraceRecordParser::PrintHumanReadableIOTraceRecord(
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const IOTraceRecord& record) {
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std::stringstream ss;
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ss << "Access Time : " << std::setw(20) << std::left
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<< record.access_timestamp << ", File Name: " << std::setw(20) << std::left
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<< record.file_name.c_str() << ", File Operation: " << std::setw(18)
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<< std::left << record.file_operation.c_str()
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<< ", Latency: " << std::setw(10) << std::left << record.latency
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<< ", IO Status: " << record.io_status.c_str();
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// Each bit in io_op_data stores which corresponding info from IOTraceOp will
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// be added in the trace. Foreg, if bit at position 1 is set then
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// IOTraceOp::kIOLen (length) will be logged in the record (Since
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// IOTraceOp::kIOLen = 1 in the enum). So find all the set positions in
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// io_op_data one by one and, update corresponsing info in the trace record,
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// unset that bit to find other set bits until io_op_data = 0.
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/* Read remaining options based on io_op_data set by file operation */
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int64_t io_op_data = static_cast<int64_t>(record.io_op_data);
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while (io_op_data) {
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// Find the rightmost set bit.
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uint32_t set_pos = static_cast<uint32_t>(log2(io_op_data & -io_op_data));
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switch (set_pos) {
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case IOTraceOp::kIOFileSize:
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ss << ", File Size: " << record.file_size;
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break;
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case IOTraceOp::kIOLen:
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ss << ", Length: " << record.len;
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break;
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case IOTraceOp::kIOOffset:
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ss << ", Offset: " << record.offset;
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break;
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default:
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assert(false);
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}
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// unset the rightmost bit.
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io_op_data &= (io_op_data - 1);
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}
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ss << "\n";
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fprintf(stdout, "%s", ss.str().c_str());
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}
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int IOTraceRecordParser::ReadIOTraceRecords() {
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Status status;
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Env* env(Env::Default());
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std::unique_ptr<TraceReader> trace_reader;
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std::unique_ptr<IOTraceReader> io_trace_reader;
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status = NewFileTraceReader(env, EnvOptions(), input_file_, &trace_reader);
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if (!status.ok()) {
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fprintf(stderr, "%s: %s\n", input_file_.c_str(), status.ToString().c_str());
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return 1;
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}
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io_trace_reader.reset(new IOTraceReader(std::move(trace_reader)));
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// Read the header and dump it in a file.
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IOTraceHeader header;
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status = io_trace_reader->ReadHeader(&header);
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if (!status.ok()) {
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fprintf(stderr, "%s: %s\n", input_file_.c_str(), status.ToString().c_str());
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return 1;
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}
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PrintHumanReadableHeader(header);
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// Read the records one by one and print them in human readable format.
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while (status.ok()) {
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IOTraceRecord record;
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status = io_trace_reader->ReadIOOp(&record);
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if (!status.ok()) {
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break;
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}
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PrintHumanReadableIOTraceRecord(record);
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}
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return 0;
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}
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int io_tracer_parser(int argc, char** argv) {
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ParseCommandLineFlags(&argc, &argv, true);
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if (FLAGS_io_trace_file.empty()) {
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fprintf(stderr, "IO Trace file path is empty\n");
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return 1;
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}
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IOTraceRecordParser io_tracer_parser(FLAGS_io_trace_file);
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return io_tracer_parser.ReadIOTraceRecords();
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}
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} // namespace ROCKSDB_NAMESPACE
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#endif // GFLAGS
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#endif // ROCKSDB_LITE
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