Annotation of embedaddon/iperf/src/main.c, revision 1.1.1.1
1.1 misho 1: /*
2: * iperf, Copyright (c) 2014, 2015, The Regents of the University of
3: * California, through Lawrence Berkeley National Laboratory (subject
4: * to receipt of any required approvals from the U.S. Dept. of
5: * Energy). All rights reserved.
6: *
7: * If you have questions about your rights to use or distribute this
8: * software, please contact Berkeley Lab's Technology Transfer
9: * Department at TTD@lbl.gov.
10: *
11: * NOTICE. This software is owned by the U.S. Department of Energy.
12: * As such, the U.S. Government has been granted for itself and others
13: * acting on its behalf a paid-up, nonexclusive, irrevocable,
14: * worldwide license in the Software to reproduce, prepare derivative
15: * works, and perform publicly and display publicly. Beginning five
16: * (5) years after the date permission to assert copyright is obtained
17: * from the U.S. Department of Energy, and subject to any subsequent
18: * five (5) year renewals, the U.S. Government is granted for itself
19: * and others acting on its behalf a paid-up, nonexclusive,
20: * irrevocable, worldwide license in the Software to reproduce,
21: * prepare derivative works, distribute copies to the public, perform
22: * publicly and display publicly, and to permit others to do so.
23: *
24: * This code is distributed under a BSD style license, see the LICENSE
25: * file for complete information.
26: */
27: #include "iperf_config.h"
28:
29: #include <stdio.h>
30: #include <stdlib.h>
31: #include <string.h>
32: #include <getopt.h>
33: #include <errno.h>
34: #include <signal.h>
35: #include <unistd.h>
36: #ifdef HAVE_STDINT_H
37: #include <stdint.h>
38: #endif
39: #include <sys/socket.h>
40: #include <sys/types.h>
41: #include <netinet/in.h>
42: #include <arpa/inet.h>
43: #include <netdb.h>
44: #ifdef HAVE_STDINT_H
45: #include <stdint.h>
46: #endif
47: #include <netinet/tcp.h>
48:
49: #include "iperf.h"
50: #include "iperf_api.h"
51: #include "units.h"
52: #include "iperf_locale.h"
53: #include "net.h"
54:
55:
56: static int run(struct iperf_test *test);
57:
58:
59: /**************************************************************************/
60: int
61: main(int argc, char **argv)
62: {
63: struct iperf_test *test;
64:
65: // XXX: Setting the process affinity requires root on most systems.
66: // Is this a feature we really need?
67: #ifdef TEST_PROC_AFFINITY
68: /* didnt seem to work.... */
69: /*
70: * increasing the priority of the process to minimise packet generation
71: * delay
72: */
73: int rc = setpriority(PRIO_PROCESS, 0, -15);
74:
75: if (rc < 0) {
76: perror("setpriority:");
77: fprintf(stderr, "setting priority to valid level\n");
78: rc = setpriority(PRIO_PROCESS, 0, 0);
79: }
80:
81: /* setting the affinity of the process */
82: cpu_set_t cpu_set;
83: int affinity = -1;
84: int ncores = 1;
85:
86: sched_getaffinity(0, sizeof(cpu_set_t), &cpu_set);
87: if (errno)
88: perror("couldn't get affinity:");
89:
90: if ((ncores = sysconf(_SC_NPROCESSORS_CONF)) <= 0)
91: err("sysconf: couldn't get _SC_NPROCESSORS_CONF");
92:
93: CPU_ZERO(&cpu_set);
94: CPU_SET(affinity, &cpu_set);
95: if (sched_setaffinity(0, sizeof(cpu_set_t), &cpu_set) != 0)
96: err("couldn't change CPU affinity");
97: #endif
98:
99: test = iperf_new_test();
100: if (!test)
101: iperf_errexit(NULL, "create new test error - %s", iperf_strerror(i_errno));
102: iperf_defaults(test); /* sets defaults */
103:
104: if (iperf_parse_arguments(test, argc, argv) < 0) {
105: iperf_err(test, "parameter error - %s", iperf_strerror(i_errno));
106: fprintf(stderr, "\n");
107: usage_long();
108: exit(1);
109: }
110:
111: if (run(test) < 0)
112: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
113:
114: iperf_free_test(test);
115:
116: return 0;
117: }
118:
119:
120: static jmp_buf sigend_jmp_buf;
121:
122: static void
123: sigend_handler(int sig)
124: {
125: longjmp(sigend_jmp_buf, 1);
126: }
127:
128: /**************************************************************************/
129: static int
130: run(struct iperf_test *test)
131: {
132: /* Termination signals. */
133: iperf_catch_sigend(sigend_handler);
134: if (setjmp(sigend_jmp_buf))
135: iperf_got_sigend(test);
136:
137: switch (test->role) {
138: case 's':
139: if (test->daemon) {
140: int rc = daemon(0, 0);
141: if (rc < 0) {
142: i_errno = IEDAEMON;
143: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
144: }
145: }
146: if (iperf_create_pidfile(test) < 0) {
147: i_errno = IEPIDFILE;
148: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
149: }
150: for (;;) {
151: int rc;
152: rc = iperf_run_server(test);
153: if (rc < 0) {
154: iperf_err(test, "error - %s", iperf_strerror(i_errno));
155: if (rc < -1) {
156: iperf_errexit(test, "exiting");
157: break;
158: }
159: }
160: iperf_reset_test(test);
161: if (iperf_get_test_one_off(test))
162: break;
163: }
164: iperf_delete_pidfile(test);
165: break;
166: case 'c':
167: if (iperf_run_client(test) < 0)
168: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
169: break;
170: default:
171: usage();
172: break;
173: }
174:
175: iperf_catch_sigend(SIG_DFL);
176:
177: return 0;
178: }
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