2 * SPDX-License-Identifier: Apache-2.0
3 * Copyright(c) 2021 Cisco Systems, Inc.
7 #include <vppinfra/time.h>
8 #include <vppinfra/cache.h>
9 #include <vppinfra/error.h>
10 #include <vnet/ethernet/ethernet.h>
11 #include <vnet/ip/ip.h>
12 #include <vnet/gso/gso.h>
13 #include <vnet/gso/hdr_offset_parser.h>
14 #include <vnet/tcp/tcp_packet.h>
16 #define MAX_GSO_PACKET_SIZE (TCP_MAX_GSO_SZ - 1)
17 #define MIN_GSO_SEGMENT_SIZE 128
18 #define MAX_GSO_SEGMENT_SIZE 2048
19 #define DEFAULT_GSO_SEGMENT_SIZE 1448
21 typedef struct _gso_test_data
24 const char *description;
30 struct _gso_test_data *next;
44 gso_test_data_t *gso_test_data;
47 gso_test_main_t gso_test_main;
49 #define GSO_TEST_REGISTER_DATA(x, ...) \
50 __VA_ARGS__ gso_test_data_t __gso_test_data_##x; \
51 static void __clib_constructor __gso_test_data_fn_##x (void) \
53 gso_test_main_t *gtm = &gso_test_main; \
54 __gso_test_data_##x.next = gtm->gso_test_data; \
55 gtm->gso_test_data = &__gso_test_data_##x; \
57 __VA_ARGS__ gso_test_data_t __gso_test_data_##x
60 u8 gso_ipv4_tcp_data[64] = {
61 0x02, 0xfe, 0x39, 0xe5, 0x09, 0x8f, 0x02, 0xfe, 0x2d, 0x18, 0x63, 0x18, 0x08,
62 0x00, 0x45, 0x00, 0x05, 0xdc, 0xdb, 0x42, 0x40, 0x00, 0x40, 0x06, 0xc4, 0x85,
63 0xc0, 0xa8, 0x0a, 0x02, 0xc0, 0xa8, 0x0a, 0x01, 0xd8, 0xde, 0x14, 0x51, 0x34,
64 0x93, 0xa8, 0x1b, 0x7b, 0xef, 0x2e, 0x7e, 0x80, 0x10, 0x00, 0xe5, 0xc7, 0x03,
65 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0xce, 0xaa, 0x00, 0x2f, 0xf2, 0xc3
68 GSO_TEST_REGISTER_DATA (gso_ipv4_tcp, static) = {
70 .description = "IPv4 TCP",
71 .data = gso_ipv4_tcp_data,
72 .data_size = sizeof (gso_ipv4_tcp_data),
73 .l4_hdr_len = sizeof (tcp_header_t),
79 u8 gso_ipv6_tcp_data[] = {
80 0x02, 0xfe, 0x39, 0xe5, 0x09, 0x8f, 0x02, 0xfe, 0x2d, 0x18, 0x63, 0x18,
81 0x08, 0x00, 0x60, 0x0d, 0xf4, 0x97, 0x00, 0x40, 0x06, 0x40, 0xfd, 0x01,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x10, 0x00, 0xfd, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x10, 0x01, 0xd8, 0xde, 0x14, 0x51, 0x34, 0x93,
85 0xa8, 0x1b, 0x7b, 0xef, 0x2e, 0x7e, 0x80, 0x10, 0x00, 0xe5, 0xc7, 0x03,
86 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0xce, 0xaa, 0x00, 0x2f, 0xf2, 0xc3
89 GSO_TEST_REGISTER_DATA (gso_ipv6_tcp, static) = {
91 .description = "IPv6 TCP",
92 .data = gso_ipv6_tcp_data,
93 .data_size = sizeof (gso_ipv6_tcp_data),
94 .l4_hdr_len = sizeof (tcp_header_t),
100 fill_buffers (vlib_main_t *vm, u32 *buffer_indices, u8 *data, u32 data_size,
101 u32 n_buffers, u32 buffer_size, u32 packet_size, u32 gso_size,
106 for (i = 0; i < n_buffers; i++)
108 u64 seed = clib_cpu_time_now ();
109 vlib_buffer_t *b = vlib_get_buffer (vm, buffer_indices[i]);
112 (packet_size > buffer_size) ? (packet_size - buffer_size) : 0;
114 clib_memcpy_fast (b->data, data, data_size);
117 for (u32 j = data_size; j < buffer_size; j += 8)
118 *(u64 *) (b->data + j) = 1 + random_u64 (&seed);
119 b->current_length = buffer_size;
123 vlib_buffer_t *pb = b;
125 n_bufs = ((remaining_data + buffer_size - 1) / buffer_size);
130 vec_validate (buffers, n_bufs - 1);
131 n_alloc = vlib_buffer_alloc (vm, buffers, n_bufs);
132 if (n_alloc < n_bufs)
134 vlib_buffer_free (vm, buffers, n_alloc);
136 vm, "vlib buffer alloc failed at %u requested %u actual %u", i,
143 pb->next_buffer = buffers[k];
144 pb->flags |= VLIB_BUFFER_NEXT_PRESENT;
145 pb = vlib_get_buffer (vm, buffers[k]);
146 pb->current_data = 0;
147 fill_data_size = clib_min (buffer_size, remaining_data);
148 remaining_data -= fill_data_size;
149 for (u32 l = 0; l < fill_data_size; l += 8)
150 *(u64 *) (pb->data + l) = 1 + random_u64 (&seed);
151 pb->current_length = fill_data_size;
153 len += fill_data_size;
156 b->flags |= VNET_BUFFER_F_GSO;
157 vnet_buffer2 (b)->gso_size = gso_size;
158 vnet_buffer2 (b)->gso_l4_hdr_sz = l4_hdr_len;
160 b->total_length_not_including_first_buffer = len;
161 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
166 static_always_inline u32
167 gso_segment_buffer_test (vlib_main_t *vm, u32 bi,
168 vnet_interface_per_thread_data_t *ptd, u8 is_l2,
171 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
172 generic_header_offset_t gho = { 0 };
173 u32 n_bytes_b = vlib_buffer_length_in_chain (vm, b);
176 if (PREDICT_TRUE (b->flags & VNET_BUFFER_F_GSO))
178 vnet_generic_header_offset_parser (b, &gho, is_l2, !is_ip6, is_ip6);
180 gso_segment_buffer (vm, ptd, bi, b, &gho, n_bytes_b, is_l2, is_ip6);
186 static clib_error_t *
187 test_gso_perf (vlib_main_t *vm, gso_test_main_t *gtm)
189 clib_error_t *err = 0;
190 vnet_interface_per_thread_data_t *ptd = 0;
191 u32 packet_size = MAX_GSO_PACKET_SIZE;
192 u32 buffer_size = vlib_buffer_get_default_data_size (vm);
194 u32 n_buffers, warmup_rounds, rounds;
195 u32 *buffer_indices = 0;
196 u64 t0, t1, t2[10] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
197 gso_test_data_t *gso_test_data = gtm->gso_test_data;
200 if (gtm->buffer_size > buffer_size)
201 return clib_error_return (0, "buffer size must be <= %u", buffer_size);
203 if (gtm->packet_size > packet_size)
204 return clib_error_return (0, "gso packet size must be <= %u", packet_size);
206 if ((gtm->gso_size > MAX_GSO_SEGMENT_SIZE) ||
207 (gtm->gso_size < MIN_GSO_SEGMENT_SIZE))
208 return clib_error_return (
209 0, "gso segment size must be in between %u >= and <= %u",
210 MIN_GSO_SEGMENT_SIZE, MAX_GSO_SEGMENT_SIZE);
212 rounds = gtm->rounds ? gtm->rounds : 256;
213 n_buffers = gtm->n_buffers ? gtm->n_buffers : 256;
214 warmup_rounds = gtm->warmup_rounds ? gtm->warmup_rounds : 256;
215 buffer_size = gtm->buffer_size ? gtm->buffer_size : buffer_size;
216 gso_size = gtm->gso_size;
217 packet_size = gtm->packet_size ? gtm->packet_size : packet_size;
219 vec_validate_aligned (ptd, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
220 vec_validate_aligned (buffer_indices, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
223 "GSO Segmentation: packet-size %u gso-size %u buffer-size "
224 "%u n_buffers %u rounds %u "
226 packet_size, gso_size, buffer_size, n_buffers, rounds,
228 vlib_cli_output (vm, " cpu-freq %.2f GHz",
229 (f64) vm->clib_time.clocks_per_second * 1e-9);
231 while (gso_test_data)
234 u32 n_alloc = vlib_buffer_alloc (vm, buffer_indices, n_buffers);
235 if (n_alloc != n_buffers)
237 vlib_cli_output (vm, " Test: %s FAILED", gso_test_data->description);
238 err = clib_error_return (0, "buffer alloc failure");
239 vlib_buffer_free (vm, buffer_indices, n_alloc);
243 fill_buffers (vm, buffer_indices, gso_test_data->data,
244 gso_test_data->data_size, n_buffers, buffer_size,
245 packet_size, gso_size, gso_test_data->l4_hdr_len);
247 u8 is_l2 = gso_test_data->is_l2;
248 u8 is_ip6 = gso_test_data->is_ip6;
250 for (k = 0; k < warmup_rounds; k++)
252 for (j = 0; j < n_filled; j++)
253 gso_segment_buffer_test (vm, buffer_indices[j], &ptd[j], is_l2,
255 for (j = 0; j < n_filled; j++)
257 vlib_buffer_free (vm, ptd[j].split_buffers,
258 vec_len (ptd[j].split_buffers));
259 vec_free (ptd[j].split_buffers);
263 for (i = 0; i < 10; i++)
265 for (k = 0; k < rounds; k++)
267 t0 = clib_cpu_time_now ();
268 for (j = 0; j < n_filled; j++)
269 gso_segment_buffer_test (vm, buffer_indices[j], &ptd[j], is_l2,
271 t1 = clib_cpu_time_now ();
273 for (j = 0; j < n_filled; j++)
275 vlib_buffer_free (vm, ptd[j].split_buffers,
276 vec_len (ptd[j].split_buffers));
277 vec_free (ptd[j].split_buffers);
283 vm, "===========================================================");
284 vlib_cli_output (vm, " Test: %s", gso_test_data->description);
286 vm, "===========================================================");
287 for (i = 0; i < 10; i++)
290 f64 tpp1 = (f64) (t2[i]) / (n_filled * rounds);
292 f64 tpB1 = (f64) (t2[i]) / (n_filled * rounds * packet_size);
293 // Packets per second
294 f64 Kpps1 = vm->clib_time.clocks_per_second * 1e-3 / tpp1;
295 // Throughput Giga-bits per second
296 f64 Gbps1 = vm->clib_time.clocks_per_second * 8 * 1e-9 / tpB1;
299 vm, "%-2u: %.03f ticks/packet, %.02f Kpps, %.02f Gbps\n", i + 1,
303 vlib_buffer_free (vm, buffer_indices, n_alloc);
304 clib_memset (t2, 0, sizeof (t2));
305 gso_test_data = gso_test_data->next;
311 vec_free (buffer_indices);
315 static clib_error_t *
316 test_gso_command_fn (vlib_main_t *vm, unformat_input_t *input,
317 vlib_cli_command_t *cmd)
319 gso_test_main_t *gtm = &gso_test_main;
320 clib_error_t *err = 0;
321 f64 end, start, total_time;
323 gtm->gso_size = DEFAULT_GSO_SEGMENT_SIZE;
324 gtm->warmup_rounds = 0;
327 gtm->buffer_size = 0;
328 gtm->packet_size = 0;
330 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
332 if (unformat (input, "verbose"))
334 else if (unformat (input, "detail"))
336 else if (unformat (input, "buffers %u", >m->n_buffers))
338 else if (unformat (input, "buffer-size %u", >m->buffer_size))
340 else if (unformat (input, "packet-size %u", >m->packet_size))
342 else if (unformat (input, "gso-size %u", >m->gso_size))
344 else if (unformat (input, "rounds %u", >m->rounds))
346 else if (unformat (input, "warmup-rounds %u", >m->warmup_rounds))
350 return clib_error_return (0, "unknown input '%U'",
351 format_unformat_error, input);
355 start = clib_cpu_time_now ();
356 err = test_gso_perf (vm, gtm);
357 end = clib_cpu_time_now ();
359 total_time = (f64) (end - start) / vm->clib_time.clocks_per_second;
360 vlib_cli_output (vm, "Total Time Test Took %.02f seconds", total_time);
365 VLIB_CLI_COMMAND (test_gso_command, static) = {
367 .short_help = "test gso [buffers <n>] [buffer-size <size>] [packet-size "
368 "<size>] [gso-size <size>] [rounds <n>] "
369 "[warmup-rounds <n>]",
370 .function = test_gso_command_fn,
373 static clib_error_t *
374 gso_test_init (vlib_main_t *vm)
379 VLIB_INIT_FUNCTION (gso_test_init);