How to use the libuv to accept the tcp connection with multi-thread? - c++

Question

I write a C++ dome of tcp server with the libuv. When I check the cpu performance, I found the dome is a single thread running, how can I implement it with multi-thread?
Currently, the dome can hanlde 100,000+ tcp request per second, it can only eat 1 CPU.
Code:
#include <iostream>
#include <atomic>
#include "uv.h"
#include <thread>
#include <mutex>
#include <map>
using namespace std;
auto loop = uv_default_loop();
struct sockaddr_in addr;
typedef struct {
uv_write_t req;
uv_buf_t buf;
} write_req_t;
typedef struct {
uv_stream_t* client;
uv_alloc_cb alloc_cb;
uv_read_cb read_cb;
} begin_read_req;
void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
buf->base = (char*)malloc(suggested_size);
buf->len = suggested_size;
}
void free_write_req(uv_write_t *req) {
write_req_t *wr = (write_req_t*)req;
free(wr->buf.base);
free(wr);
}
void echo_write(uv_write_t *req, int status) {
if (status) {
fprintf(stderr, "Write error %s\n", uv_strerror(status));
}
free_write_req(req);
}
void echo_read(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
if (nread > 0) {
auto req = (write_req_t*)malloc(sizeof(write_req_t));
auto *aaa = (char*)malloc(5);
aaa[0] = '+';
aaa[1] = 'O';
aaa[2] = 'K';
aaa[3] = '\r';
aaa[4] = '\n';
req->buf = uv_buf_init(aaa, 5);
uv_write((uv_write_t*)req, client, &req->buf, 1, echo_write);
}
if (nread < 0) {
if (nread != UV_EOF)
fprintf(stderr, "Read error %s\n", uv_err_name(static_cast<unsigned int>(nread)));
uv_close((uv_handle_t*)client, nullptr);
}
free(buf->base);
}
void acceptClientRead(uv_work_t *req) {
begin_read_req *data = (begin_read_req *)req->data;
uv_read_start(data->client, data->alloc_cb, data->read_cb);
}
void on_new_connection(uv_stream_t *server, int status) {
if (status < 0) {
cout << "New connection error:" << uv_strerror(status);
return;
}
uv_tcp_t *client = (uv_tcp_t *)malloc(sizeof(uv_tcp_t));
uv_tcp_init(loop, client);
uv_work_t *req = (uv_work_t *)malloc(sizeof(uv_work_t));
begin_read_req *read_req = (begin_read_req *)malloc(sizeof(begin_read_req));
read_req->client = (uv_stream_t *)client;
read_req->read_cb = echo_read;
read_req->alloc_cb = alloc_buffer;
req->data = read_req;
if (uv_accept(server, (uv_stream_t *)client) == 0) {
uv_read_start((uv_stream_t *)client, alloc_buffer, echo_read);
// uv_queue_work(workloop[0], req, acceptClientRead, nullptr);
}
else {
uv_close((uv_handle_t *)client, nullptr);
}
}
void timer_callback(uv_timer_t* handle) {
cout << std::this_thread::get_id() << "---------" << "hello" << endl;
}
int main() {
uv_tcp_t server{};
uv_tcp_init(loop, &server);
uv_ip4_addr("0.0.0.0", 8790, &addr);
uv_tcp_bind(&server, (const struct sockaddr *) &addr, 0);
uv_listen((uv_stream_t *)&server, 511, on_new_connection);
uv_run(loop, UV_RUN_DEFAULT);
return 0;
}
Of course, I can make the write step asynchronous in the method "echo_read", but I didn't do anything before the write, can I make the demo multi-thread in another way to improve the throughput?