// SPDX-License-Identifier: GPL-2.0/* * This times how long it takes to bind to a port when the port already * has multiple sockets in its bhash table. * * In the setup(), we populate the port's bhash table with * MAX_THREADS * MAX_CONNECTIONS number of entries. */ #include <unistd.h>#include <stdio.h>#include <netdb.h>#include <pthread.h>#include <string.h>#include <stdbool.h> #define MAX_THREADS 600#define MAX_CONNECTIONS 40 static const char *setup_addr_v6 = "::1";static const char *setup_addr_v4 = "127.0.0.1";static const char *setup_addr;static const char *bind_addr;static const char *port;bool use_v6;int ret; static int fd_array[MAX_THREADS][MAX_CONNECTIONS]; static int bind_socket(int opt, const char *addr){ struct addrinfo *res, hint = {}; int sock_fd, reuse = 1, err; int domain = use_v6 ? AF_INET6 : AF_INET; sock_fd = socket(domain, SOCK_STREAM, 0); if (sock_fd < 0) { perror("socket fd err"); return sock_fd; } hint.ai_family = domain; hint.ai_socktype = SOCK_STREAM; err = getaddrinfo(addr, port, &hint, &res); if (err) { perror("getaddrinfo failed"); goto cleanup; } if (opt) { err = setsockopt(sock_fd, SOL_SOCKET, opt, &reuse, sizeof(reuse)); if (err) { perror("setsockopt failed"); goto err_free_info; } } err = bind(sock_fd, res->ai_addr, res->ai_addrlen); if (err) { perror("failed to bind to port"); goto err_free_info; } freeaddrinfo(res); return sock_fd;err_free_info: freeaddrinfo(res);cleanup: close(sock_fd); return err;} static void *setup(void *arg){ int sock_fd, i; int *array = (int *)arg; for (i = 0; i < MAX_CONNECTIONS; i++) { sock_fd = bind_socket(SO_REUSEPORT, setup_addr); if (sock_fd < 0) { ret = sock_fd; pthread_exit(&ret); } array[i] = sock_fd; } return NULL;} int main(int argc, const char *argv[]){ int listener_fd, sock_fd, i, j; pthread_t tid[MAX_THREADS]; clock_t begin, end; if (argc != 4) { printf("Usage: listener <port> <ipv6 | ipv4> <bind-addr>\n"); return -1; } port = argv[1]; use_v6 = strcmp(argv[2], "ipv6") == 0; bind_addr = argv[3]; setup_addr = use_v6 ? setup_addr_v6 : setup_addr_v4; listener_fd = bind_socket(SO_REUSEPORT, setup_addr); if (listen(listener_fd, 100) < 0) { perror("listen failed"); return -1; } /* Set up threads to populate the bhash table entry for the port */ for (i = 0; i < MAX_THREADS; i++) pthread_create(&tid[i], NULL, setup, fd_array[i]); for (i = 0; i < MAX_THREADS; i++) pthread_join(tid[i], NULL); if (ret) goto done; begin = clock(); /* Bind to the same port on a different address */ sock_fd = bind_socket(0, bind_addr); if (sock_fd < 0) goto done; end = clock(); printf("time spent = %f\n", (double)(end - begin) / CLOCKS_PER_SEC); /* clean up */ close(sock_fd); done: close(listener_fd); for (i = 0; i < MAX_THREADS; i++) { for (j = 0; i < MAX_THREADS; i++) close(fd_array[i][j]); } return 0;}
// SPDX-License-Identifier: GPL-2.0
/*
* This times how long it takes to bind to a port when the port already
* has multiple sockets in its bhash table.
*
* In the setup(), we populate the port's bhash table with
* MAX_THREADS * MAX_CONNECTIONS number of entries.
*/
#include <unistd.h>
#include <stdio.h>
#include <netdb.h>
#include <pthread.h>
#include <string.h>
#include <stdbool.h>
#define MAX_THREADS 600
#define MAX_CONNECTIONS 40
static const char *setup_addr_v6 = "::1";
static const char *setup_addr_v4 = "127.0.0.1";
static const char *setup_addr;
static const char *bind_addr;
static const char *port;
bool use_v6;
int ret;
static int fd_array[MAX_THREADS][MAX_CONNECTIONS];
static int bind_socket(int opt, const char *addr)
{
struct addrinfo *res, hint = {};
int sock_fd, reuse = 1, err;
int domain = use_v6 ? AF_INET6 : AF_INET;
sock_fd = socket(domain, SOCK_STREAM, 0);
if (sock_fd < 0) {
perror("socket fd err");
return sock_fd;
}
hint.ai_family = domain;
hint.ai_socktype = SOCK_STREAM;
err = getaddrinfo(addr, port, &hint, &res);
if (err) {
perror("getaddrinfo failed");
goto cleanup;
}
if (opt) {
err = setsockopt(sock_fd, SOL_SOCKET, opt, &reuse, sizeof(reuse));
if (err) {
perror("setsockopt failed");
goto err_free_info;
}
}
err = bind(sock_fd, res->ai_addr, res->ai_addrlen);
if (err) {
perror("failed to bind to port");
goto err_free_info;
}
freeaddrinfo(res);
return sock_fd;
err_free_info:
freeaddrinfo(res);
cleanup:
close(sock_fd);
return err;
}
static void *setup(void *arg)
{
int sock_fd, i;
int *array = (int *)arg;
for (i = 0; i < MAX_CONNECTIONS; i++) {
sock_fd = bind_socket(SO_REUSEPORT, setup_addr);
if (sock_fd < 0) {
ret = sock_fd;
pthread_exit(&ret);
}
array[i] = sock_fd;
}
return NULL;
}
int main(int argc, const char *argv[])
{
int listener_fd, sock_fd, i, j;
pthread_t tid[MAX_THREADS];
clock_t begin, end;
if (argc != 4) {
printf("Usage: listener <port> <ipv6 | ipv4> <bind-addr>\n");
return -1;
}
port = argv[1];
use_v6 = strcmp(argv[2], "ipv6") == 0;
bind_addr = argv[3];
setup_addr = use_v6 ? setup_addr_v6 : setup_addr_v4;
listener_fd = bind_socket(SO_REUSEPORT, setup_addr);
if (listen(listener_fd, 100) < 0) {
perror("listen failed");
return -1;
}
/* Set up threads to populate the bhash table entry for the port */
for (i = 0; i < MAX_THREADS; i++)
pthread_create(&tid[i], NULL, setup, fd_array[i]);
for (i = 0; i < MAX_THREADS; i++)
pthread_join(tid[i], NULL);
if (ret)
goto done;
begin = clock();
/* Bind to the same port on a different address */
sock_fd = bind_socket(0, bind_addr);
if (sock_fd < 0)
goto done;
end = clock();
printf("time spent = %f\n", (double)(end - begin) / CLOCKS_PER_SEC);
/* clean up */
close(sock_fd);
done:
close(listener_fd);
for (i = 0; i < MAX_THREADS; i++) {
for (j = 0; i < MAX_THREADS; i++)
close(fd_array[i][j]);
}
return 0;
}