101 lines
5.1 KiB
C++
101 lines
5.1 KiB
C++
/*
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* This file is open source software, licensed to you under the terms
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* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
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* distributed with this work for additional information regarding copyright
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* ownership. You may not use this file except in compliance with the License.
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*
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* Copyright (C) 2021 ScyllaDB
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*/
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#include <seastar/core/app-template.hh>
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#include <seastar/core/thread.hh>
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#include <seastar/core/reactor.hh>
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#include <seastar/core/io_queue.hh>
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#include <seastar/util/closeable.hh>
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#include <yaml-cpp/yaml.h>
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using namespace seastar;
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int main(int ac, char** av) {
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namespace bpo = boost::program_options;
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app_template app;
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auto opt_add = app.add_options();
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opt_add
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("directory", bpo::value<sstring>()->default_value("."), "directory to work on")
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("max-reqsize", bpo::value<unsigned>()->default_value(128u * 1024u), "maximum request size in bytes used when calculating capacity (default: 128kB)")
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;
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return app.run(ac, av, [&] {
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return seastar::async([&] {
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auto& opts = app.configuration();
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auto& storage = opts["directory"].as<sstring>();
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auto max_reqsz = opts["max-reqsize"].as<unsigned>();
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YAML::Emitter out;
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out << YAML::BeginDoc;
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out << YAML::BeginMap;
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engine().open_file_dma(storage + "/tempfile", open_flags::rw | open_flags::create | open_flags::exclusive).then([&] (file f) {
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return with_closeable(std::move(f), [&out, &storage, max_reqsz] (file& f) {
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return remove_file(storage + "/tempfile").then([&out, &f] {
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out << YAML::Key << "disk_read_max_length" << YAML::Value << f.disk_read_max_length();
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out << YAML::Key << "disk_write_max_length" << YAML::Value << f.disk_write_max_length();
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}).then([&out, &f, max_reqsz] {
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return f.stat().then([&out, max_reqsz] (auto st) {
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auto& ioq = engine().get_io_queue(st.st_dev);
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auto& cfg = ioq.get_config();
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out << YAML::Key << "io_latency_goal_ms" << YAML::Value <<
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std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(cfg.rate_limit_duration).count();
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out << YAML::Key << "io_queue" << YAML::BeginMap;
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out << YAML::Key << "req_count_rate" << YAML::Value << cfg.req_count_rate;
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out << YAML::Key << "blocks_count_rate" << YAML::Value << cfg.blocks_count_rate;
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out << YAML::Key << "disk_req_write_to_read_multiplier" << YAML::Value << cfg.disk_req_write_to_read_multiplier;
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out << YAML::Key << "disk_blocks_write_to_read_multiplier" << YAML::Value << cfg.disk_blocks_write_to_read_multiplier;
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out << YAML::EndMap;
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out << YAML::Key << "fair_queue" << YAML::BeginMap;
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out << YAML::Key << "capacities" << YAML::BeginMap;
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for (size_t sz = 512; sz <= max_reqsz; sz <<= 1) {
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out << YAML::Key << sz << YAML::BeginMap;
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out << YAML::Key << "read" << YAML::Value << ioq.request_capacity(internal::io_direction_and_length(internal::io_direction_and_length::read_idx, sz));
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out << YAML::Key << "write" << YAML::Value << ioq.request_capacity(internal::io_direction_and_length(internal::io_direction_and_length::write_idx, sz));
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out << YAML::EndMap;
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}
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out << YAML::EndMap;
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const auto& fg = internal::get_fair_group(ioq, internal::io_direction_and_length::write_idx);
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out << YAML::Key << "per_tick_grab_threshold" << YAML::Value << fg.per_tick_grab_threshold();
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const auto& tb = fg.token_bucket();
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out << YAML::Key << "token_bucket" << YAML::BeginMap;
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out << YAML::Key << "limit" << YAML::Value << tb.limit();
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out << YAML::Key << "rate" << YAML::Value << tb.rate();
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out << YAML::Key << "threshold" << YAML::Value << tb.threshold();
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out << YAML::EndMap;
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out << YAML::EndMap;
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});
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});
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});
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}).get();
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out << YAML::EndMap;
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out << YAML::EndDoc;
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std::cout << out.c_str();
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});
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});
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}
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