1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
10 #include <rte_cycles.h>
11 #include <rte_random.h>
12 #include <rte_branch_prediction.h>
17 #include "test_xmmt_ops.h"
19 #define TEST_LPM_ASSERT(cond) do { \
21 printf("Error at line %d: \n", __LINE__); \
26 #define ITERATIONS (1 << 10)
27 #define BATCH_SIZE (1 << 12)
30 #define MAX_RULE_NUM (1200000)
37 struct route_rule large_route_table[MAX_RULE_NUM];
39 static uint32_t num_route_entries;
40 #define NUM_ROUTE_ENTRIES num_route_entries
48 /* struct route_rule_count defines the total number of rules in following a/b/c
49 * each item in a[]/b[]/c[] is the number of common IP address class A/B/C, not
50 * including the ones for private local network.
52 struct route_rule_count {
53 uint32_t a[RTE_LPM_MAX_DEPTH];
54 uint32_t b[RTE_LPM_MAX_DEPTH];
55 uint32_t c[RTE_LPM_MAX_DEPTH];
58 /* All following numbers of each depth of each common IP class are just
59 * got from previous large constant table in app/test/test_lpm_routes.h .
60 * In order to match similar performance, they keep same depth and IP
61 * address coverage as previous constant table. These numbers don't
62 * include any private local IP address. As previous large const rule
63 * table was just dumped from a real router, there are no any IP address
66 static struct route_rule_count rule_count = {
67 .a = { /* IP class A in which the most significant bit is 0 */
83 3856, /* depth = 16 */
84 3268, /* depth = 17 */
85 5662, /* depth = 18 */
86 17301, /* depth = 19 */
87 22226, /* depth = 20 */
88 11147, /* depth = 21 */
89 16746, /* depth = 22 */
90 17120, /* depth = 23 */
91 77578, /* depth = 24 */
94 1107, /* depth = 27 */
95 1121, /* depth = 28 */
96 2316, /* depth = 29 */
101 .b = { /* IP class A in which the most 2 significant bits are 10 */
113 168, /* depth = 12 */
114 305, /* depth = 13 */
115 569, /* depth = 14 */
116 1129, /* depth = 15 */
117 50800, /* depth = 16 */
118 1645, /* depth = 17 */
119 1820, /* depth = 18 */
120 3506, /* depth = 19 */
121 3258, /* depth = 20 */
122 3424, /* depth = 21 */
123 4971, /* depth = 22 */
124 6885, /* depth = 23 */
125 39771, /* depth = 24 */
126 424, /* depth = 25 */
127 170, /* depth = 26 */
128 433, /* depth = 27 */
130 366, /* depth = 29 */
131 377, /* depth = 30 */
135 .c = { /* IP class A in which the most 3 significant bits are 110 */
148 237, /* depth = 13 */
149 1007, /* depth = 14 */
150 1717, /* depth = 15 */
151 14663, /* depth = 16 */
152 8070, /* depth = 17 */
153 16185, /* depth = 18 */
154 48261, /* depth = 19 */
155 36870, /* depth = 20 */
156 33960, /* depth = 21 */
157 50638, /* depth = 22 */
158 61422, /* depth = 23 */
159 466549, /* depth = 24 */
160 1829, /* depth = 25 */
161 4824, /* depth = 26 */
162 4927, /* depth = 27 */
163 5914, /* depth = 28 */
164 10254, /* depth = 29 */
165 4905, /* depth = 30 */
171 static void generate_random_rule_prefix(uint32_t ip_class, uint8_t depth)
173 /* IP address class A, the most significant bit is 0 */
174 #define IP_HEAD_MASK_A 0x00000000
175 #define IP_HEAD_BIT_NUM_A 1
177 /* IP address class B, the most significant 2 bits are 10 */
178 #define IP_HEAD_MASK_B 0x80000000
179 #define IP_HEAD_BIT_NUM_B 2
181 /* IP address class C, the most significant 3 bits are 110 */
182 #define IP_HEAD_MASK_C 0xC0000000
183 #define IP_HEAD_BIT_NUM_C 3
185 uint32_t class_depth;
190 uint32_t fixed_bit_num;
191 uint32_t ip_head_mask;
194 struct route_rule *ptr_rule;
196 if (ip_class == IP_CLASS_A) { /* IP Address class A */
197 fixed_bit_num = IP_HEAD_BIT_NUM_A;
198 ip_head_mask = IP_HEAD_MASK_A;
199 rule_num = rule_count.a[depth - 1];
200 } else if (ip_class == IP_CLASS_B) { /* IP Address class B */
201 fixed_bit_num = IP_HEAD_BIT_NUM_B;
202 ip_head_mask = IP_HEAD_MASK_B;
203 rule_num = rule_count.b[depth - 1];
204 } else { /* IP Address class C */
205 fixed_bit_num = IP_HEAD_BIT_NUM_C;
206 ip_head_mask = IP_HEAD_MASK_C;
207 rule_num = rule_count.c[depth - 1];
213 /* the number of rest bits which don't include the most significant
214 * fixed bits for this IP address class
216 class_depth = depth - fixed_bit_num;
218 /* range is the maximum number of rules for this depth and
219 * this IP address class
221 range = 1 << class_depth;
223 /* only mask the most depth significant generated bits
224 * except fixed bits for IP address class
228 /* Widen coverage of IP address in generated rules */
229 if (range <= rule_num)
232 step = round((double)range / rule_num);
234 /* Only generate rest bits except the most significant
235 * fixed bits for IP address class
237 start = lrand48() & mask;
238 ptr_rule = &large_route_table[num_route_entries];
239 for (k = 0; k < rule_num; k++) {
240 ptr_rule->ip = (start << (RTE_LPM_MAX_DEPTH - depth))
242 ptr_rule->depth = depth;
244 start = (start + step) & mask;
246 num_route_entries += rule_num;
249 static void insert_rule_in_random_pos(uint32_t ip, uint8_t depth)
253 struct route_rule tmp;
258 } while ((try_count < 10) && (pos > num_route_entries));
260 if ((pos > num_route_entries) || (pos >= MAX_RULE_NUM))
261 pos = num_route_entries >> 1;
263 tmp = large_route_table[pos];
264 large_route_table[pos].ip = ip;
265 large_route_table[pos].depth = depth;
266 if (num_route_entries < MAX_RULE_NUM)
267 large_route_table[num_route_entries++] = tmp;
270 static void generate_large_route_rule_table(void)
275 num_route_entries = 0;
276 memset(large_route_table, 0, sizeof(large_route_table));
278 for (ip_class = IP_CLASS_A; ip_class <= IP_CLASS_C; ip_class++) {
279 for (depth = 1; depth <= RTE_LPM_MAX_DEPTH; depth++) {
280 generate_random_rule_prefix(ip_class, depth);
284 /* Add following rules to keep same as previous large constant table,
285 * they are 4 rules with private local IP address and 1 all-zeros prefix
288 insert_rule_in_random_pos(IPv4(0, 0, 0, 0), 8);
289 insert_rule_in_random_pos(IPv4(10, 2, 23, 147), 32);
290 insert_rule_in_random_pos(IPv4(192, 168, 100, 10), 24);
291 insert_rule_in_random_pos(IPv4(192, 168, 25, 100), 24);
292 insert_rule_in_random_pos(IPv4(192, 168, 129, 124), 32);
296 print_route_distribution(const struct route_rule *table, uint32_t n)
300 printf("Route distribution per prefix width: \n");
301 printf("DEPTH QUANTITY (PERCENT)\n");
302 printf("--------------------------- \n");
305 for (i = 1; i <= 32; i++) {
306 unsigned depth_counter = 0;
309 for (j = 0; j < n; j++)
310 if (table[j].depth == (uint8_t) i)
313 percent_hits = ((double)depth_counter)/((double)n) * 100;
314 printf("%.2u%15u (%.2f)\n", i, depth_counter, percent_hits);
322 struct rte_lpm *lpm = NULL;
323 struct rte_lpm_config config;
325 config.max_rules = 2000000;
326 config.number_tbl8s = 2048;
328 uint64_t begin, total_time, lpm_used_entries = 0;
330 uint32_t next_hop_add = 0xAA, next_hop_return = 0;
332 uint64_t cache_line_counter = 0;
335 rte_srand(rte_rdtsc());
337 generate_large_route_rule_table();
339 printf("No. routes = %u\n", (unsigned) NUM_ROUTE_ENTRIES);
341 print_route_distribution(large_route_table, (uint32_t) NUM_ROUTE_ENTRIES);
343 lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
344 TEST_LPM_ASSERT(lpm != NULL);
349 for (i = 0; i < NUM_ROUTE_ENTRIES; i++) {
350 if (rte_lpm_add(lpm, large_route_table[i].ip,
351 large_route_table[i].depth, next_hop_add) == 0)
355 total_time = rte_rdtsc() - begin;
357 printf("Unique added entries = %d\n", status);
358 /* Obtain add statistics. */
359 for (i = 0; i < RTE_LPM_TBL24_NUM_ENTRIES; i++) {
360 if (lpm->tbl24[i].valid)
364 if ((uint64_t)count < lpm_used_entries) {
365 cache_line_counter++;
366 count = lpm_used_entries;
371 printf("Used table 24 entries = %u (%g%%)\n",
372 (unsigned) lpm_used_entries,
373 (lpm_used_entries * 100.0) / RTE_LPM_TBL24_NUM_ENTRIES);
374 printf("64 byte Cache entries used = %u (%u bytes)\n",
375 (unsigned) cache_line_counter, (unsigned) cache_line_counter * 64);
377 printf("Average LPM Add: %g cycles\n",
378 (double)total_time / NUM_ROUTE_ENTRIES);
380 /* Measure single Lookup */
384 for (i = 0; i < ITERATIONS; i++) {
385 static uint32_t ip_batch[BATCH_SIZE];
387 for (j = 0; j < BATCH_SIZE; j++)
388 ip_batch[j] = rte_rand();
390 /* Lookup per batch */
393 for (j = 0; j < BATCH_SIZE; j++) {
394 if (rte_lpm_lookup(lpm, ip_batch[j], &next_hop_return) != 0)
398 total_time += rte_rdtsc() - begin;
401 printf("Average LPM Lookup: %.1f cycles (fails = %.1f%%)\n",
402 (double)total_time / ((double)ITERATIONS * BATCH_SIZE),
403 (count * 100.0) / (double)(ITERATIONS * BATCH_SIZE));
405 /* Measure bulk Lookup */
408 for (i = 0; i < ITERATIONS; i++) {
409 static uint32_t ip_batch[BATCH_SIZE];
410 uint32_t next_hops[BULK_SIZE];
412 /* Create array of random IP addresses */
413 for (j = 0; j < BATCH_SIZE; j++)
414 ip_batch[j] = rte_rand();
416 /* Lookup per batch */
418 for (j = 0; j < BATCH_SIZE; j += BULK_SIZE) {
420 rte_lpm_lookup_bulk(lpm, &ip_batch[j], next_hops, BULK_SIZE);
421 for (k = 0; k < BULK_SIZE; k++)
422 if (unlikely(!(next_hops[k] & RTE_LPM_LOOKUP_SUCCESS)))
426 total_time += rte_rdtsc() - begin;
428 printf("BULK LPM Lookup: %.1f cycles (fails = %.1f%%)\n",
429 (double)total_time / ((double)ITERATIONS * BATCH_SIZE),
430 (count * 100.0) / (double)(ITERATIONS * BATCH_SIZE));
432 /* Measure LookupX4 */
435 for (i = 0; i < ITERATIONS; i++) {
436 static uint32_t ip_batch[BATCH_SIZE];
437 uint32_t next_hops[4];
439 /* Create array of random IP addresses */
440 for (j = 0; j < BATCH_SIZE; j++)
441 ip_batch[j] = rte_rand();
443 /* Lookup per batch */
445 for (j = 0; j < BATCH_SIZE; j += RTE_DIM(next_hops)) {
449 ipx4 = vect_loadu_sil128((xmm_t *)(ip_batch + j));
450 ipx4 = *(xmm_t *)(ip_batch + j);
451 rte_lpm_lookupx4(lpm, ipx4, next_hops, UINT32_MAX);
452 for (k = 0; k < RTE_DIM(next_hops); k++)
453 if (unlikely(next_hops[k] == UINT32_MAX))
457 total_time += rte_rdtsc() - begin;
459 printf("LPM LookupX4: %.1f cycles (fails = %.1f%%)\n",
460 (double)total_time / ((double)ITERATIONS * BATCH_SIZE),
461 (count * 100.0) / (double)(ITERATIONS * BATCH_SIZE));
467 for (i = 0; i < NUM_ROUTE_ENTRIES; i++) {
468 /* rte_lpm_delete(lpm, ip, depth) */
469 status += rte_lpm_delete(lpm, large_route_table[i].ip,
470 large_route_table[i].depth);
473 total_time += rte_rdtsc() - begin;
475 printf("Average LPM Delete: %g cycles\n",
476 (double)total_time / NUM_ROUTE_ENTRIES);
478 rte_lpm_delete_all(lpm);
484 REGISTER_TEST_COMMAND(lpm_perf_autotest, test_lpm_perf);