diff options
Diffstat (limited to 'nest')
| -rw-r--r-- | nest/Makefile | 2 | ||||
| -rw-r--r-- | nest/rt-fib_test.c | 246 |
2 files changed, 247 insertions, 1 deletions
diff --git a/nest/Makefile b/nest/Makefile index 163a1199..5a244c75 100644 --- a/nest/Makefile +++ b/nest/Makefile @@ -9,6 +9,6 @@ $(o)proto-build.c: Makefile $(lastword $(MAKEFILE_LIST)) $(objdir)/.dir-stamp prepare: $(o)proto-build.c -tests_src := a-set_test.c a-path_test.c +tests_src := a-set_test.c a-path_test.c rt-fib_test.c tests_targets := $(tests_targets) $(tests-target-files) tests_objs := $(tests_objs) $(src-o-files) diff --git a/nest/rt-fib_test.c b/nest/rt-fib_test.c new file mode 100644 index 00000000..2dd7ce8a --- /dev/null +++ b/nest/rt-fib_test.c @@ -0,0 +1,246 @@ +/* + * BIRD -- Forwarding Information Base -- Tests + * + * (c) 2023 CZ.NIC z.s.p.o. + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#include "test/birdtest.h" +#include "test/bt-utils.h" + +#include "nest/route.h" + + +#define TESTS_NUM 10 +#define PREFIXES_NUM 400000 +#define PREFIX_TESTS_NUM 200000 +#define PREFIX_BENCH_MAX 1000000 +#define PREFIX_BENCH_NUM 10000000 + +struct test_node +{ + int pos; + struct fib_node n; +}; + +static inline int net_match(struct test_node *tn, net_addr *query, net_addr *data) +{ return (tn->pos < PREFIXES_NUM) && net_equal(query, &data[tn->pos]); } + +static int +t_match_random_net(void) +{ + bt_bird_init(); + bt_config_parse(BT_CONFIG_SIMPLE); + + for (int round = 0; round < TESTS_NUM; round++) + { + int type = !(round & 1) ? NET_IP4 : NET_IP6; + + pool *p = rp_new(&root_pool, "FIB pool"); + net_addr *nets = bt_random_nets(type, PREFIXES_NUM); + + /* Make FIB structure */ + struct fib f; + fib_init(&f, &root_pool, type, sizeof(struct test_node), OFFSETOF(struct test_node, n), 4, NULL); + + for (int i = 0; i < PREFIXES_NUM; i++) + { + struct test_node *tn = fib_get(&f, &nets[i]); + bt_assert(!tn->pos || net_match(tn, &nets[i], nets)); + tn->pos = i; + } + + /* Test (mostly) negative matches */ + for (int i = 0; i < PREFIX_TESTS_NUM; i++) + { + net_addr net; + bt_random_net(&net, type); + + struct test_node *tn = fib_find(&f, &net); + bt_assert(!tn || net_match(tn, &net, nets)); + } + + /* Test positive matches */ + for (int i = 0; i < PREFIX_TESTS_NUM; i++) + { + int j = bt_random_n(PREFIXES_NUM); + + struct test_node *tn = fib_find(&f, &nets[j]); + bt_assert(tn && net_match(tn, &nets[j], nets)); + } + + rfree(p); + tmp_flush(); + } + + bt_bird_cleanup(); + return 1; +} + +static int +t_fib_walk(void) +{ + bt_bird_init(); + bt_config_parse(BT_CONFIG_SIMPLE); + + for (int round = 0; round < TESTS_NUM; round++) + { + int type = !(round & 1) ? NET_IP4 : NET_IP6; + + pool *p = rp_new(&root_pool, "FIB pool"); + net_addr *nets = bt_random_nets(type, PREFIXES_NUM); + byte *marks = tmp_allocz(PREFIXES_NUM); + + /* Make FIB structure */ + struct fib f; + fib_init(&f, p, type, sizeof(struct test_node), OFFSETOF(struct test_node, n), 4, NULL); + + for (int i = 1; i < PREFIXES_NUM; i++) + { + struct test_node *tn = fib_get(&f, &nets[i]); + bt_assert(!tn->pos || net_match(tn, &nets[i], nets)); + if (tn->pos) + { + /* Mark dupicate nets */ + bt_assert(!marks[tn->pos]); + marks[tn->pos] = 1; + } + tn->pos = i; + } + + /* Walk FIB and mark nets */ + FIB_WALK(&f, struct test_node, tn) + { + bt_assert(!marks[tn->pos]); + marks[tn->pos] = 1; + } + FIB_WALK_END; + + /* Check in all nets are marked */ + for (int i = 1; i < PREFIXES_NUM; i++) + bt_assert(marks[i]); + + rfree(p); + tmp_flush(); + } + + bt_bird_cleanup(); + return 1; +} + +static int +benchmark_fib_dataset(const char *filename, int type) +{ + net_addr *nets, *test_r, *test_s; + uint n = PREFIX_BENCH_MAX; + int tn = PREFIX_BENCH_NUM; + int match; + + bt_reset_suite_case_timer(); + bt_log_suite_case_result(1, "Reading %s", filename, n); + nets = bt_read_net_file(filename, type, &n); + bt_log_suite_case_result(1, "Read net data, %u nets", n); + bt_reset_suite_case_timer(); + + pool *p = rp_new(&root_pool, "FIB pool"); + + /* Make FIB structure */ + struct fib f; + fib_init(&f, p, type, sizeof(struct test_node), OFFSETOF(struct test_node, n), 0, NULL); + + for (int i = 0; i < (int) n; i++) + { + struct test_node *tn = fib_get(&f, &nets[i]); + tn->pos = i; + } + + bt_log_suite_case_result(1, "Fill FIB structure, %u nets, order %u", n, f.hash_order); + bt_reset_suite_case_timer(); + + /* Compute FIB size */ + size_t fib_size = rmemsize(p).effective * 1000 / (1024*1024); + bt_log_suite_case_result(1, "FIB size: %u.%03u MB", (uint) (fib_size / 1000), (uint) (fib_size % 1000)); + + /* Compute FIB histogram */ + uint hist[16] = {}; + uint sum = 0; + for (uint i = 0; i < f.hash_size; i++) + { + int len = 0; + for (struct fib_node *fn = f.hash_table[i]; fn; fn = fn->next) + len++; + + sum += len; + len = MIN(len, 15); + hist[len]++; + } + bt_log_suite_case_result(1, "FIB histogram:"); + for (uint i = 0; i < 16; i++) + if (hist[i]) + bt_log_suite_case_result(1, "%02u: %8u", i, hist[i]); + + uint avg = (sum * 1000) / (f.hash_size - hist[0]); + bt_log_suite_case_result(1, "FIB chain length: %u.%03u", (uint) (avg / 1000), (uint) (avg % 1000)); + bt_reset_suite_case_timer(); + + /* Make test data */ + test_r = bt_random_nets(type, tn); + test_s = bt_random_net_subset(nets, n, tn); + + bt_log_suite_case_result(1, "Make test data, 2x %u nets", tn); + bt_reset_suite_case_timer(); + + /* Test (mostly negative) random matches */ + match = 0; + for (int i = 0; i < tn; i++) + if (fib_find(&f, &test_r[i])) + match++; + + bt_log_suite_case_result(1, "Random match, %d / %d matches", match, tn); + bt_reset_suite_case_timer(); + + /* Test (positive) subset matches */ + match = 0; + for (int i = 0; i < tn; i++) + if (fib_find(&f, &test_s[i])) + match++; + + bt_log_suite_case_result(1, "Subset match, %d / %d matches", match, tn); + bt_log_suite_case_result(1, ""); + bt_reset_suite_case_timer(); + + rfree(p); + tmp_flush(); + return 1; +} + +static int UNUSED +t_bench_fib_datasets(void) +{ + bt_bird_init(); + bt_config_parse(BT_CONFIG_SIMPLE); + + /* Specific datasets, not included */ + benchmark_fib_dataset("fib-data-bgp-v4-1", NET_IP4); + benchmark_fib_dataset("fib-data-bgp-v4-10", NET_IP4); + benchmark_fib_dataset("fib-data-bgp-v6-1", NET_IP6); + benchmark_fib_dataset("fib-data-bgp-v6-10", NET_IP6); + + bt_bird_cleanup(); + + return 1; +} + +int +main(int argc, char *argv[]) +{ + bt_init(argc, argv); + + bt_test_suite(t_match_random_net, "Testing random prefix matching"); + bt_test_suite(t_fib_walk, "Testing FIB_WALK() on random FIB"); + + // bt_test_suite(t_bench_fib_datasets, "Benchmark FIB from datasets by random subset of nets"); + + return bt_exit_value(); +} |