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#include "rgw_ratelimit.h"
#include "rgw_common.h"
#include "random"
#include <cstdlib>
#include <string>
#include <boost/asio.hpp>
#include <spawn/spawn.hpp>
#include <boost/asio/steady_timer.hpp>
#include <chrono>
#include <mutex>
#include <unordered_map>
#include <atomic>
#include <boost/program_options.hpp>
using Executor = boost::asio::io_context::executor_type;
std::uniform_int_distribution<unsigned int> dist(0, 1);
std::random_device rd;
std::default_random_engine rng{rd()};
std::uniform_int_distribution<unsigned long long> disttenant(2, 100000000);
struct client_info {
uint64_t accepted = 0;
uint64_t rejected = 0;
uint64_t ops = 0;
uint64_t bytes = 0;
uint64_t num_retries = 0;
std::string tenant;
};
struct parameters {
int64_t req_size = 1;
int64_t backend_bandwidth = 1;
size_t wait_between_retries_ms = 1;
int num_clients = 1;
};
std::shared_ptr<std::vector<client_info>> ds = std::make_shared<std::vector<client_info>>(std::vector<client_info>());
std::string method[2] = {"PUT", "GET"};
void simulate_transfer(client_info& it, const RGWRateLimitInfo* info, std::shared_ptr<RateLimiter> ratelimit, const parameters& params, spawn::yield_context& yield, boost::asio::io_context& ioctx)
{
auto dout = DoutPrefix(g_ceph_context, ceph_subsys_rgw, "rate limiter: ");
boost::asio::steady_timer timer(ioctx);
int rw = 0; // will always use PUT method as there is no difference
std::string methodop(method[rw]);
auto req_size = params.req_size;
auto backend_bandwidth = params.backend_bandwidth;
// the 4 * 1024 * 1024 is the RGW default we are sending in a typical environment
while (req_size) {
if (req_size <= backend_bandwidth) {
while (req_size > 0) {
if(req_size > 4*1024*1024) {
ratelimit->decrease_bytes(methodop.c_str(),it.tenant, 4*1024*1024, info);
it.bytes += 4*1024*1024;
req_size = req_size - 4*1024*1024;
}
else {
ratelimit->decrease_bytes(methodop.c_str(),it.tenant, req_size, info);
req_size = 0;
}
}
} else {
int64_t total_bytes = 0;
while (req_size > 0) {
if (req_size >= 4*1024*1024) {
if (total_bytes >= backend_bandwidth)
{
timer.expires_after(std::chrono::seconds(1));
timer.async_wait(yield);
total_bytes = 0;
}
ratelimit->decrease_bytes(methodop.c_str(),it.tenant, 4*1024*1024, info);
it.bytes += 4*1024*1024;
req_size = req_size - 4*1024*1024;
total_bytes += 4*1024*1024;
}
else {
ratelimit->decrease_bytes(methodop.c_str(),it.tenant, req_size, info);
it.bytes += req_size;
total_bytes += req_size;
req_size = 0;
}
}
}
}
}
bool simulate_request(client_info& it, const RGWRateLimitInfo& info, std::shared_ptr<RateLimiter> ratelimit)
{
boost::asio::io_context context;
auto time = ceph::coarse_real_clock::now();
int rw = 0; // will always use PUT method as there is no different
std::string methodop = method[rw];
auto dout = DoutPrefix(g_ceph_context, ceph_subsys_rgw, "rate limiter: ");
bool to_fail = ratelimit->should_rate_limit(methodop.c_str(), it.tenant, time, &info);
if(to_fail)
{
it.rejected++;
it.ops++;
return true;
}
it.accepted++;
return false;
}
void simulate_client(client_info& it, const RGWRateLimitInfo& info, std::shared_ptr<RateLimiter> ratelimit, const parameters& params, spawn::yield_context& ctx, bool& to_run, boost::asio::io_context& ioctx)
{
for (;;)
{
bool to_retry = simulate_request(it, info, ratelimit);
while (to_retry && to_run)
{
if (params.wait_between_retries_ms)
{
boost::asio::steady_timer timer(ioctx);
timer.expires_after(std::chrono::milliseconds(params.wait_between_retries_ms));
timer.async_wait(ctx);
}
to_retry = simulate_request(it, info, ratelimit);
}
if (!to_run)
{
return;
}
simulate_transfer(it, &info, ratelimit, params, ctx, ioctx);
}
}
void simulate_clients(boost::asio::io_context& context, std::string tenant, const RGWRateLimitInfo& info, std::shared_ptr<RateLimiter> ratelimit, const parameters& params, bool& to_run)
{
for (int i = 0; i < params.num_clients; i++)
{
auto& it = ds->emplace_back(client_info());
it.tenant = tenant;
int x = ds->size() - 1;
spawn::spawn(context,
[&to_run ,x, ratelimit, info, params, &context](spawn::yield_context ctx)
{
auto& it = ds.get()->operator[](x);
simulate_client(it, info, ratelimit, params, ctx, to_run, context);
});
}
}
int main(int argc, char **argv)
{
int num_ratelimit_classes = 1;
int64_t ops_limit = 1;
int64_t bw_limit = 1;
int thread_count = 512;
int runtime = 60;
parameters params;
try
{
using namespace boost::program_options;
options_description desc{"Options"};
desc.add_options()
("help,h", "Help screen")
("num_ratelimit_classes", value<int>()->default_value(1), "how many ratelimit tenants")
("request_size", value<int64_t>()->default_value(1), "what is the request size we are testing if 0, it will be randomized")
("backend_bandwidth", value<int64_t>()->default_value(1), "what is the backend bandwidth, so there will be wait between decrease_bytes")
("wait_between_retries_ms", value<size_t>()->default_value(1), "time in seconds to wait between retries")
("ops_limit", value<int64_t>()->default_value(1), "ops limit for the tenants")
("bw_limit", value<int64_t>()->default_value(1), "bytes per second limit")
("threads", value<int>()->default_value(512), "server's threads count")
("runtime", value<int>()->default_value(60), "For how many seconds the test will run")
("num_clients", value<int>()->default_value(1), "number of clients per tenant to run");
variables_map vm;
store(parse_command_line(argc, argv, desc), vm);
if (vm.count("help")) {
std::cout << desc << std::endl;
return EXIT_SUCCESS;
}
num_ratelimit_classes = vm["num_ratelimit_classes"].as<int>();
params.req_size = vm["request_size"].as<int64_t>();
params.backend_bandwidth = vm["backend_bandwidth"].as<int64_t>();
params.wait_between_retries_ms = vm["wait_between_retries_ms"].as<size_t>();
params.num_clients = vm["num_clients"].as<int>();
ops_limit = vm["ops_limit"].as<int64_t>();
bw_limit = vm["bw_limit"].as<int64_t>();
thread_count = vm["threads"].as<int>();
runtime = vm["runtime"].as<int>();
}
catch (const boost::program_options::error &ex)
{
std::cerr << ex.what() << std::endl;
return EXIT_FAILURE;
}
RGWRateLimitInfo info;
info.enabled = true;
info.max_read_bytes = bw_limit;
info.max_write_bytes = bw_limit;
info.max_read_ops = ops_limit;
info.max_write_ops = ops_limit;
std::unique_ptr<CephContext> cct = std::make_unique<CephContext>(CEPH_ENTITY_TYPE_ANY);
if (!g_ceph_context)
{
g_ceph_context = cct.get();
}
std::shared_ptr<ActiveRateLimiter> ratelimit(new ActiveRateLimiter(g_ceph_context));
ratelimit->start();
std::vector<std::thread> threads;
using Executor = boost::asio::io_context::executor_type;
std::optional<boost::asio::executor_work_guard<Executor>> work;
threads.reserve(thread_count);
boost::asio::io_context context;
boost::asio::io_context stopme;
work.emplace(boost::asio::make_work_guard(context));
// server execution
for (int i = 0; i < thread_count; i++) {
threads.emplace_back([&]() noexcept {
context.run();
});
}
//client execution
bool to_run = true;
ds->reserve(num_ratelimit_classes*params.num_clients);
for (int i = 0; i < num_ratelimit_classes; i++)
{
unsigned long long tenantid = disttenant(rng);
std::string tenantuser = "uuser" + std::to_string(tenantid);
simulate_clients(context, tenantuser, info, ratelimit->get_active(), params, to_run);
}
boost::asio::steady_timer timer_runtime(stopme);
timer_runtime.expires_after(std::chrono::seconds(runtime));
timer_runtime.wait();
work.reset();
context.stop();
to_run = false;
for (auto& i : threads)
{
i.join();
}
std::unordered_map<std::string,client_info> metrics_by_tenant;
for(auto& i : *ds.get())
{
auto it = metrics_by_tenant.emplace(i.tenant, client_info()).first;
std::cout << i.accepted << std::endl;
it->second.accepted += i.accepted;
it->second.rejected += i.rejected;
}
// TODO sum the results by tenant
for(auto& i : metrics_by_tenant)
{
std::cout << "Tenant is: " << i.first << std::endl;
std::cout << "Simulator finished accepted sum : " << i.second.accepted << std::endl;
std::cout << "Simulator finished rejected sum : " << i.second.rejected << std::endl;
}
return 0;
}
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