1 // SPDX-License-Identifier: GPL-2.0
3 * This times how long it takes to bind to a port when the port already
4 * has multiple sockets in its bhash table.
6 * In the setup(), we populate the port's bhash table with
7 * MAX_THREADS * MAX_CONNECTIONS number of entries.
17 #define MAX_THREADS 600
18 #define MAX_CONNECTIONS 40
20 static const char *setup_addr_v6 = "::1";
21 static const char *setup_addr_v4 = "127.0.0.1";
22 static const char *setup_addr;
23 static const char *bind_addr;
24 static const char *port;
28 static int fd_array[MAX_THREADS][MAX_CONNECTIONS];
30 static int bind_socket(int opt, const char *addr)
32 struct addrinfo *res, hint = {};
33 int sock_fd, reuse = 1, err;
34 int domain = use_v6 ? AF_INET6 : AF_INET;
36 sock_fd = socket(domain, SOCK_STREAM, 0);
38 perror("socket fd err");
42 hint.ai_family = domain;
43 hint.ai_socktype = SOCK_STREAM;
45 err = getaddrinfo(addr, port, &hint, &res);
47 perror("getaddrinfo failed");
52 err = setsockopt(sock_fd, SOL_SOCKET, opt, &reuse, sizeof(reuse));
54 perror("setsockopt failed");
59 err = bind(sock_fd, res->ai_addr, res->ai_addrlen);
61 perror("failed to bind to port");
72 static void *setup(void *arg)
75 int *array = (int *)arg;
77 for (i = 0; i < MAX_CONNECTIONS; i++) {
78 sock_fd = bind_socket(SO_REUSEADDR | SO_REUSEPORT, setup_addr);
89 int main(int argc, const char *argv[])
91 int listener_fd, sock_fd, i, j;
92 pthread_t tid[MAX_THREADS];
96 printf("Usage: listener <port> <ipv6 | ipv4> <bind-addr>\n");
101 use_v6 = strcmp(argv[2], "ipv6") == 0;
104 setup_addr = use_v6 ? setup_addr_v6 : setup_addr_v4;
106 listener_fd = bind_socket(SO_REUSEADDR | SO_REUSEPORT, setup_addr);
107 if (listen(listener_fd, 100) < 0) {
108 perror("listen failed");
112 /* Set up threads to populate the bhash table entry for the port */
113 for (i = 0; i < MAX_THREADS; i++)
114 pthread_create(&tid[i], NULL, setup, fd_array[i]);
116 for (i = 0; i < MAX_THREADS; i++)
117 pthread_join(tid[i], NULL);
124 /* Bind to the same port on a different address */
125 sock_fd = bind_socket(0, bind_addr);
131 printf("time spent = %f\n", (double)(end - begin) / CLOCKS_PER_SEC);
138 for (i = 0; i < MAX_THREADS; i++) {
139 for (j = 0; i < MAX_THREADS; i++)
140 close(fd_array[i][j]);