summaryrefslogtreecommitdiffstats
path: root/tools/testing/selftests/net/udpgso_bench_tx.c
blob: 4074538b5df594346ab2f88a427472bbaf29659b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
// SPDX-License-Identifier: GPL-2.0

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/udp.h>
#include <poll.h>
#include <sched.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>

#ifndef ETH_MAX_MTU
#define ETH_MAX_MTU 0xFFFFU
#endif

#ifndef UDP_SEGMENT
#define UDP_SEGMENT		103
#endif

#ifndef SO_ZEROCOPY
#define SO_ZEROCOPY	60
#endif

#ifndef MSG_ZEROCOPY
#define MSG_ZEROCOPY	0x4000000
#endif

#define NUM_PKT		100

static bool	cfg_cache_trash;
static int	cfg_cpu		= -1;
static int	cfg_connected	= true;
static int	cfg_family	= PF_UNSPEC;
static uint16_t	cfg_mss;
static int	cfg_payload_len	= (1472 * 42);
static int	cfg_port	= 8000;
static int	cfg_runtime_ms	= -1;
static bool	cfg_segment;
static bool	cfg_sendmmsg;
static bool	cfg_tcp;
static bool	cfg_zerocopy;
static int	cfg_msg_nr;
static uint16_t	cfg_gso_size;

static socklen_t cfg_alen;
static struct sockaddr_storage cfg_dst_addr;

static bool interrupted;
static char buf[NUM_PKT][ETH_MAX_MTU];

static void sigint_handler(int signum)
{
	if (signum == SIGINT)
		interrupted = true;
}

static unsigned long gettimeofday_ms(void)
{
	struct timeval tv;

	gettimeofday(&tv, NULL);
	return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
}

static int set_cpu(int cpu)
{
	cpu_set_t mask;

	CPU_ZERO(&mask);
	CPU_SET(cpu, &mask);
	if (sched_setaffinity(0, sizeof(mask), &mask))
		error(1, 0, "setaffinity %d", cpu);

	return 0;
}

static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
{
	struct sockaddr_in6 *addr6 = (void *) sockaddr;
	struct sockaddr_in *addr4 = (void *) sockaddr;

	switch (domain) {
	case PF_INET:
		addr4->sin_family = AF_INET;
		addr4->sin_port = htons(cfg_port);
		if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
			error(1, 0, "ipv4 parse error: %s", str_addr);
		break;
	case PF_INET6:
		addr6->sin6_family = AF_INET6;
		addr6->sin6_port = htons(cfg_port);
		if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
			error(1, 0, "ipv6 parse error: %s", str_addr);
		break;
	default:
		error(1, 0, "illegal domain");
	}
}

static void flush_zerocopy(int fd)
{
	struct msghdr msg = {0};	/* flush */
	int ret;

	while (1) {
		ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
		if (ret == -1 && errno == EAGAIN)
			break;
		if (ret == -1)
			error(1, errno, "errqueue");
		if (msg.msg_flags != (MSG_ERRQUEUE | MSG_CTRUNC))
			error(1, 0, "errqueue: flags 0x%x\n", msg.msg_flags);
		msg.msg_flags = 0;
	}
}

static int send_tcp(int fd, char *data)
{
	int ret, done = 0, count = 0;

	while (done < cfg_payload_len) {
		ret = send(fd, data + done, cfg_payload_len - done,
			   cfg_zerocopy ? MSG_ZEROCOPY : 0);
		if (ret == -1)
			error(1, errno, "write");

		done += ret;
		count++;
	}

	return count;
}

static int send_udp(int fd, char *data)
{
	int ret, total_len, len, count = 0;

	total_len = cfg_payload_len;

	while (total_len) {
		len = total_len < cfg_mss ? total_len : cfg_mss;

		ret = sendto(fd, data, len, cfg_zerocopy ? MSG_ZEROCOPY : 0,
			     cfg_connected ? NULL : (void *)&cfg_dst_addr,
			     cfg_connected ? 0 : cfg_alen);
		if (ret == -1)
			error(1, errno, "write");
		if (ret != len)
			error(1, errno, "write: %uB != %uB\n", ret, len);

		total_len -= len;
		count++;
	}

	return count;
}

static int send_udp_sendmmsg(int fd, char *data)
{
	const int max_nr_msg = ETH_MAX_MTU / ETH_DATA_LEN;
	struct mmsghdr mmsgs[max_nr_msg];
	struct iovec iov[max_nr_msg];
	unsigned int off = 0, left;
	int i = 0, ret;

	memset(mmsgs, 0, sizeof(mmsgs));

	left = cfg_payload_len;
	while (left) {
		if (i == max_nr_msg)
			error(1, 0, "sendmmsg: exceeds max_nr_msg");

		iov[i].iov_base = data + off;
		iov[i].iov_len = cfg_mss < left ? cfg_mss : left;

		mmsgs[i].msg_hdr.msg_iov = iov + i;
		mmsgs[i].msg_hdr.msg_iovlen = 1;

		off += iov[i].iov_len;
		left -= iov[i].iov_len;
		i++;
	}

	ret = sendmmsg(fd, mmsgs, i, cfg_zerocopy ? MSG_ZEROCOPY : 0);
	if (ret == -1)
		error(1, errno, "sendmmsg");

	return ret;
}

static void send_udp_segment_cmsg(struct cmsghdr *cm)
{
	uint16_t *valp;

	cm->cmsg_level = SOL_UDP;
	cm->cmsg_type = UDP_SEGMENT;
	cm->cmsg_len = CMSG_LEN(sizeof(cfg_gso_size));
	valp = (void *)CMSG_DATA(cm);
	*valp = cfg_gso_size;
}

static int send_udp_segment(int fd, char *data)
{
	char control[CMSG_SPACE(sizeof(cfg_gso_size))] = {0};
	struct msghdr msg = {0};
	struct iovec iov = {0};
	int ret;

	iov.iov_base = data;
	iov.iov_len = cfg_payload_len;

	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;

	msg.msg_control = control;
	msg.msg_controllen = sizeof(control);
	send_udp_segment_cmsg(CMSG_FIRSTHDR(&msg));

	msg.msg_name = (void *)&cfg_dst_addr;
	msg.msg_namelen = cfg_alen;

	ret = sendmsg(fd, &msg, cfg_zerocopy ? MSG_ZEROCOPY : 0);
	if (ret == -1)
		error(1, errno, "sendmsg");
	if (ret != iov.iov_len)
		error(1, 0, "sendmsg: %u != %lu\n", ret, iov.iov_len);

	return 1;
}

static void usage(const char *filepath)
{
	error(1, 0, "Usage: %s [-46cmtuz] [-C cpu] [-D dst ip] [-l secs] [-m messagenr] [-p port] [-s sendsize] [-S gsosize]",
		    filepath);
}

static void parse_opts(int argc, char **argv)
{
	int max_len, hdrlen;
	int c;

	while ((c = getopt(argc, argv, "46cC:D:l:mM:p:s:S:tuz")) != -1) {
		switch (c) {
		case '4':
			if (cfg_family != PF_UNSPEC)
				error(1, 0, "Pass one of -4 or -6");
			cfg_family = PF_INET;
			cfg_alen = sizeof(struct sockaddr_in);
			break;
		case '6':
			if (cfg_family != PF_UNSPEC)
				error(1, 0, "Pass one of -4 or -6");
			cfg_family = PF_INET6;
			cfg_alen = sizeof(struct sockaddr_in6);
			break;
		case 'c':
			cfg_cache_trash = true;
			break;
		case 'C':
			cfg_cpu = strtol(optarg, NULL, 0);
			break;
		case 'D':
			setup_sockaddr(cfg_family, optarg, &cfg_dst_addr);
			break;
		case 'l':
			cfg_runtime_ms = strtoul(optarg, NULL, 10) * 1000;
			break;
		case 'm':
			cfg_sendmmsg = true;
			break;
		case 'M':
			cfg_msg_nr = strtoul(optarg, NULL, 10);
			break;
		case 'p':
			cfg_port = strtoul(optarg, NULL, 0);
			break;
		case 's':
			cfg_payload_len = strtoul(optarg, NULL, 0);
			break;
		case 'S':
			cfg_gso_size = strtoul(optarg, NULL, 0);
			cfg_segment = true;
			break;
		case 't':
			cfg_tcp = true;
			break;
		case 'u':
			cfg_connected = false;
			break;
		case 'z':
			cfg_zerocopy = true;
			break;
		}
	}

	if (optind != argc)
		usage(argv[0]);

	if (cfg_family == PF_UNSPEC)
		error(1, 0, "must pass one of -4 or -6");
	if (cfg_tcp && !cfg_connected)
		error(1, 0, "connectionless tcp makes no sense");
	if (cfg_segment && cfg_sendmmsg)
		error(1, 0, "cannot combine segment offload and sendmmsg");

	if (cfg_family == PF_INET)
		hdrlen = sizeof(struct iphdr) + sizeof(struct udphdr);
	else
		hdrlen = sizeof(struct ip6_hdr) + sizeof(struct udphdr);

	cfg_mss = ETH_DATA_LEN - hdrlen;
	max_len = ETH_MAX_MTU - hdrlen;
	if (!cfg_gso_size)
		cfg_gso_size = cfg_mss;

	if (cfg_payload_len > max_len)
		error(1, 0, "payload length %u exceeds max %u",
		      cfg_payload_len, max_len);
}

static void set_pmtu_discover(int fd, bool is_ipv4)
{
	int level, name, val;

	if (is_ipv4) {
		level	= SOL_IP;
		name	= IP_MTU_DISCOVER;
		val	= IP_PMTUDISC_DO;
	} else {
		level	= SOL_IPV6;
		name	= IPV6_MTU_DISCOVER;
		val	= IPV6_PMTUDISC_DO;
	}

	if (setsockopt(fd, level, name, &val, sizeof(val)))
		error(1, errno, "setsockopt path mtu");
}

int main(int argc, char **argv)
{
	unsigned long num_msgs, num_sends;
	unsigned long tnow, treport, tstop;
	int fd, i, val;

	parse_opts(argc, argv);

	if (cfg_cpu > 0)
		set_cpu(cfg_cpu);

	for (i = 0; i < sizeof(buf[0]); i++)
		buf[0][i] = 'a' + (i % 26);
	for (i = 1; i < NUM_PKT; i++)
		memcpy(buf[i], buf[0], sizeof(buf[0]));

	signal(SIGINT, sigint_handler);

	fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
	if (fd == -1)
		error(1, errno, "socket");

	if (cfg_zerocopy) {
		val = 1;
		if (setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, &val, sizeof(val)))
			error(1, errno, "setsockopt zerocopy");
	}

	if (cfg_connected &&
	    connect(fd, (void *)&cfg_dst_addr, cfg_alen))
		error(1, errno, "connect");

	if (cfg_segment)
		set_pmtu_discover(fd, cfg_family == PF_INET);

	num_msgs = num_sends = 0;
	tnow = gettimeofday_ms();
	tstop = tnow + cfg_runtime_ms;
	treport = tnow + 1000;

	i = 0;
	do {
		if (cfg_tcp)
			num_sends += send_tcp(fd, buf[i]);
		else if (cfg_segment)
			num_sends += send_udp_segment(fd, buf[i]);
		else if (cfg_sendmmsg)
			num_sends += send_udp_sendmmsg(fd, buf[i]);
		else
			num_sends += send_udp(fd, buf[i]);
		num_msgs++;
		if (cfg_zerocopy && ((num_msgs & 0xF) == 0))
			flush_zerocopy(fd);

		if (cfg_msg_nr && num_msgs >= cfg_msg_nr)
			break;

		tnow = gettimeofday_ms();
		if (tnow > treport) {
			fprintf(stderr,
				"%s tx: %6lu MB/s %8lu calls/s %6lu msg/s\n",
				cfg_tcp ? "tcp" : "udp",
				(num_msgs * cfg_payload_len) >> 20,
				num_sends, num_msgs);
			num_msgs = num_sends = 0;
			treport = tnow + 1000;
		}

		/* cold cache when writing buffer */
		if (cfg_cache_trash)
			i = ++i < NUM_PKT ? i : 0;

	} while (!interrupted && (cfg_runtime_ms == -1 || tnow < tstop));

	if (close(fd))
		error(1, errno, "close");

	return 0;
}