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-rw-r--r--samples/bpf/map_perf_test_user.c503
1 files changed, 503 insertions, 0 deletions
diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c
new file mode 100644
index 0000000000..d2fbcf963c
--- /dev/null
+++ b/samples/bpf/map_perf_test_user.c
@@ -0,0 +1,503 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2016 Facebook
+ */
+#define _GNU_SOURCE
+#include <sched.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <asm/unistd.h>
+#include <unistd.h>
+#include <assert.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#include <time.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+
+#define TEST_BIT(t) (1U << (t))
+#define MAX_NR_CPUS 1024
+
+static __u64 time_get_ns(void)
+{
+ struct timespec ts;
+
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ return ts.tv_sec * 1000000000ull + ts.tv_nsec;
+}
+
+enum test_type {
+ HASH_PREALLOC,
+ PERCPU_HASH_PREALLOC,
+ HASH_KMALLOC,
+ PERCPU_HASH_KMALLOC,
+ LRU_HASH_PREALLOC,
+ NOCOMMON_LRU_HASH_PREALLOC,
+ LPM_KMALLOC,
+ HASH_LOOKUP,
+ ARRAY_LOOKUP,
+ INNER_LRU_HASH_PREALLOC,
+ LRU_HASH_LOOKUP,
+ NR_TESTS,
+};
+
+const char *test_map_names[NR_TESTS] = {
+ [HASH_PREALLOC] = "hash_map",
+ [PERCPU_HASH_PREALLOC] = "percpu_hash_map",
+ [HASH_KMALLOC] = "hash_map_alloc",
+ [PERCPU_HASH_KMALLOC] = "percpu_hash_map_alloc",
+ [LRU_HASH_PREALLOC] = "lru_hash_map",
+ [NOCOMMON_LRU_HASH_PREALLOC] = "nocommon_lru_hash_map",
+ [LPM_KMALLOC] = "lpm_trie_map_alloc",
+ [HASH_LOOKUP] = "hash_map",
+ [ARRAY_LOOKUP] = "array_map",
+ [INNER_LRU_HASH_PREALLOC] = "inner_lru_hash_map",
+ [LRU_HASH_LOOKUP] = "lru_hash_lookup_map",
+};
+
+enum map_idx {
+ array_of_lru_hashs_idx,
+ hash_map_alloc_idx,
+ lru_hash_lookup_idx,
+ NR_IDXES,
+};
+
+static int map_fd[NR_IDXES];
+
+static int test_flags = ~0;
+static uint32_t num_map_entries;
+static uint32_t inner_lru_hash_size;
+static int lru_hash_lookup_test_entries = 32;
+static uint32_t max_cnt = 10000;
+
+static int check_test_flags(enum test_type t)
+{
+ return test_flags & TEST_BIT(t);
+}
+
+static void test_hash_prealloc(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_getuid);
+ printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
+ cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
+}
+
+static int pre_test_lru_hash_lookup(int tasks)
+{
+ int fd = map_fd[lru_hash_lookup_idx];
+ uint32_t key;
+ long val = 1;
+ int ret;
+
+ if (num_map_entries > lru_hash_lookup_test_entries)
+ lru_hash_lookup_test_entries = num_map_entries;
+
+ /* Populate the lru_hash_map for LRU_HASH_LOOKUP perf test.
+ *
+ * It is fine that the user requests for a map with
+ * num_map_entries < 32 and some of the later lru hash lookup
+ * may return not found. For LRU map, we are not interested
+ * in such small map performance.
+ */
+ for (key = 0; key < lru_hash_lookup_test_entries; key++) {
+ ret = bpf_map_update_elem(fd, &key, &val, BPF_NOEXIST);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void do_test_lru(enum test_type test, int cpu)
+{
+ static int inner_lru_map_fds[MAX_NR_CPUS];
+
+ struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 };
+ const char *test_name;
+ __u64 start_time;
+ int i, ret;
+
+ if (test == INNER_LRU_HASH_PREALLOC && cpu) {
+ /* If CPU is not 0, create inner_lru hash map and insert the fd
+ * value into the array_of_lru_hash map. In case of CPU 0,
+ * 'inner_lru_hash_map' was statically inserted on the map init
+ */
+ int outer_fd = map_fd[array_of_lru_hashs_idx];
+ unsigned int mycpu, mynode;
+ LIBBPF_OPTS(bpf_map_create_opts, opts,
+ .map_flags = BPF_F_NUMA_NODE,
+ );
+
+ assert(cpu < MAX_NR_CPUS);
+
+ ret = syscall(__NR_getcpu, &mycpu, &mynode, NULL);
+ assert(!ret);
+
+ opts.numa_node = mynode;
+ inner_lru_map_fds[cpu] =
+ bpf_map_create(BPF_MAP_TYPE_LRU_HASH,
+ test_map_names[INNER_LRU_HASH_PREALLOC],
+ sizeof(uint32_t),
+ sizeof(long),
+ inner_lru_hash_size, &opts);
+ if (inner_lru_map_fds[cpu] == -1) {
+ printf("cannot create BPF_MAP_TYPE_LRU_HASH %s(%d)\n",
+ strerror(errno), errno);
+ exit(1);
+ }
+
+ ret = bpf_map_update_elem(outer_fd, &cpu,
+ &inner_lru_map_fds[cpu],
+ BPF_ANY);
+ if (ret) {
+ printf("cannot update ARRAY_OF_LRU_HASHS with key:%u. %s(%d)\n",
+ cpu, strerror(errno), errno);
+ exit(1);
+ }
+ }
+
+ in6.sin6_addr.s6_addr16[0] = 0xdead;
+ in6.sin6_addr.s6_addr16[1] = 0xbeef;
+
+ if (test == LRU_HASH_PREALLOC) {
+ test_name = "lru_hash_map_perf";
+ in6.sin6_addr.s6_addr16[2] = 0;
+ } else if (test == NOCOMMON_LRU_HASH_PREALLOC) {
+ test_name = "nocommon_lru_hash_map_perf";
+ in6.sin6_addr.s6_addr16[2] = 1;
+ } else if (test == INNER_LRU_HASH_PREALLOC) {
+ test_name = "inner_lru_hash_map_perf";
+ in6.sin6_addr.s6_addr16[2] = 2;
+ } else if (test == LRU_HASH_LOOKUP) {
+ test_name = "lru_hash_lookup_perf";
+ in6.sin6_addr.s6_addr16[2] = 3;
+ in6.sin6_addr.s6_addr32[3] = 0;
+ } else {
+ assert(0);
+ }
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++) {
+ ret = connect(-1, (const struct sockaddr *)&in6, sizeof(in6));
+ assert(ret == -1 && errno == EBADF);
+ if (in6.sin6_addr.s6_addr32[3] <
+ lru_hash_lookup_test_entries - 32)
+ in6.sin6_addr.s6_addr32[3] += 32;
+ else
+ in6.sin6_addr.s6_addr32[3] = 0;
+ }
+ printf("%d:%s pre-alloc %lld events per sec\n",
+ cpu, test_name,
+ max_cnt * 1000000000ll / (time_get_ns() - start_time));
+}
+
+static void test_lru_hash_prealloc(int cpu)
+{
+ do_test_lru(LRU_HASH_PREALLOC, cpu);
+}
+
+static void test_nocommon_lru_hash_prealloc(int cpu)
+{
+ do_test_lru(NOCOMMON_LRU_HASH_PREALLOC, cpu);
+}
+
+static void test_inner_lru_hash_prealloc(int cpu)
+{
+ do_test_lru(INNER_LRU_HASH_PREALLOC, cpu);
+}
+
+static void test_lru_hash_lookup(int cpu)
+{
+ do_test_lru(LRU_HASH_LOOKUP, cpu);
+}
+
+static void test_percpu_hash_prealloc(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_geteuid);
+ printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
+ cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
+}
+
+static void test_hash_kmalloc(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_getgid);
+ printf("%d:hash_map_perf kmalloc %lld events per sec\n",
+ cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
+}
+
+static void test_percpu_hash_kmalloc(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_getegid);
+ printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
+ cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
+}
+
+static void test_lpm_kmalloc(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_gettid);
+ printf("%d:lpm_perf kmalloc %lld events per sec\n",
+ cpu, max_cnt * 1000000000ll / (time_get_ns() - start_time));
+}
+
+static void test_hash_lookup(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_getpgid, 0);
+ printf("%d:hash_lookup %lld lookups per sec\n",
+ cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
+}
+
+static void test_array_lookup(int cpu)
+{
+ __u64 start_time;
+ int i;
+
+ start_time = time_get_ns();
+ for (i = 0; i < max_cnt; i++)
+ syscall(__NR_getppid, 0);
+ printf("%d:array_lookup %lld lookups per sec\n",
+ cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));
+}
+
+typedef int (*pre_test_func)(int tasks);
+const pre_test_func pre_test_funcs[] = {
+ [LRU_HASH_LOOKUP] = pre_test_lru_hash_lookup,
+};
+
+typedef void (*test_func)(int cpu);
+const test_func test_funcs[] = {
+ [HASH_PREALLOC] = test_hash_prealloc,
+ [PERCPU_HASH_PREALLOC] = test_percpu_hash_prealloc,
+ [HASH_KMALLOC] = test_hash_kmalloc,
+ [PERCPU_HASH_KMALLOC] = test_percpu_hash_kmalloc,
+ [LRU_HASH_PREALLOC] = test_lru_hash_prealloc,
+ [NOCOMMON_LRU_HASH_PREALLOC] = test_nocommon_lru_hash_prealloc,
+ [LPM_KMALLOC] = test_lpm_kmalloc,
+ [HASH_LOOKUP] = test_hash_lookup,
+ [ARRAY_LOOKUP] = test_array_lookup,
+ [INNER_LRU_HASH_PREALLOC] = test_inner_lru_hash_prealloc,
+ [LRU_HASH_LOOKUP] = test_lru_hash_lookup,
+};
+
+static int pre_test(int tasks)
+{
+ int i;
+
+ for (i = 0; i < NR_TESTS; i++) {
+ if (pre_test_funcs[i] && check_test_flags(i)) {
+ int ret = pre_test_funcs[i](tasks);
+
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void loop(int cpu)
+{
+ cpu_set_t cpuset;
+ int i;
+
+ CPU_ZERO(&cpuset);
+ CPU_SET(cpu, &cpuset);
+ sched_setaffinity(0, sizeof(cpuset), &cpuset);
+
+ for (i = 0; i < NR_TESTS; i++) {
+ if (check_test_flags(i))
+ test_funcs[i](cpu);
+ }
+}
+
+static void run_perf_test(int tasks)
+{
+ pid_t pid[tasks];
+ int i;
+
+ assert(!pre_test(tasks));
+
+ for (i = 0; i < tasks; i++) {
+ pid[i] = fork();
+ if (pid[i] == 0) {
+ loop(i);
+ exit(0);
+ } else if (pid[i] == -1) {
+ printf("couldn't spawn #%d process\n", i);
+ exit(1);
+ }
+ }
+ for (i = 0; i < tasks; i++) {
+ int status;
+
+ assert(waitpid(pid[i], &status, 0) == pid[i]);
+ assert(status == 0);
+ }
+}
+
+static void fill_lpm_trie(void)
+{
+ struct bpf_lpm_trie_key *key;
+ unsigned long value = 0;
+ unsigned int i;
+ int r;
+
+ key = alloca(sizeof(*key) + 4);
+ key->prefixlen = 32;
+
+ for (i = 0; i < 512; ++i) {
+ key->prefixlen = rand() % 33;
+ key->data[0] = rand() & 0xff;
+ key->data[1] = rand() & 0xff;
+ key->data[2] = rand() & 0xff;
+ key->data[3] = rand() & 0xff;
+ r = bpf_map_update_elem(map_fd[hash_map_alloc_idx],
+ key, &value, 0);
+ assert(!r);
+ }
+
+ key->prefixlen = 32;
+ key->data[0] = 192;
+ key->data[1] = 168;
+ key->data[2] = 0;
+ key->data[3] = 1;
+ value = 128;
+
+ r = bpf_map_update_elem(map_fd[hash_map_alloc_idx], key, &value, 0);
+ assert(!r);
+}
+
+static void fixup_map(struct bpf_object *obj)
+{
+ struct bpf_map *map;
+ int i;
+
+ bpf_object__for_each_map(map, obj) {
+ const char *name = bpf_map__name(map);
+
+ /* Only change the max_entries for the enabled test(s) */
+ for (i = 0; i < NR_TESTS; i++) {
+ if (!strcmp(test_map_names[i], name) &&
+ (check_test_flags(i))) {
+ bpf_map__set_max_entries(map, num_map_entries);
+ continue;
+ }
+ }
+ }
+
+ inner_lru_hash_size = num_map_entries;
+}
+
+int main(int argc, char **argv)
+{
+ int nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ struct bpf_link *links[8];
+ struct bpf_program *prog;
+ struct bpf_object *obj;
+ struct bpf_map *map;
+ char filename[256];
+ int i = 0;
+
+ if (argc > 1)
+ test_flags = atoi(argv[1]) ? : test_flags;
+
+ if (argc > 2)
+ nr_cpus = atoi(argv[2]) ? : nr_cpus;
+
+ if (argc > 3)
+ num_map_entries = atoi(argv[3]);
+
+ if (argc > 4)
+ max_cnt = atoi(argv[4]);
+
+ snprintf(filename, sizeof(filename), "%s.bpf.o", argv[0]);
+ obj = bpf_object__open_file(filename, NULL);
+ if (libbpf_get_error(obj)) {
+ fprintf(stderr, "ERROR: opening BPF object file failed\n");
+ return 0;
+ }
+
+ map = bpf_object__find_map_by_name(obj, "inner_lru_hash_map");
+ if (libbpf_get_error(map)) {
+ fprintf(stderr, "ERROR: finding a map in obj file failed\n");
+ goto cleanup;
+ }
+
+ inner_lru_hash_size = bpf_map__max_entries(map);
+ if (!inner_lru_hash_size) {
+ fprintf(stderr, "ERROR: failed to get map attribute\n");
+ goto cleanup;
+ }
+
+ /* resize BPF map prior to loading */
+ if (num_map_entries > 0)
+ fixup_map(obj);
+
+ /* load BPF program */
+ if (bpf_object__load(obj)) {
+ fprintf(stderr, "ERROR: loading BPF object file failed\n");
+ goto cleanup;
+ }
+
+ map_fd[0] = bpf_object__find_map_fd_by_name(obj, "array_of_lru_hashs");
+ map_fd[1] = bpf_object__find_map_fd_by_name(obj, "hash_map_alloc");
+ map_fd[2] = bpf_object__find_map_fd_by_name(obj, "lru_hash_lookup_map");
+ if (map_fd[0] < 0 || map_fd[1] < 0 || map_fd[2] < 0) {
+ fprintf(stderr, "ERROR: finding a map in obj file failed\n");
+ goto cleanup;
+ }
+
+ bpf_object__for_each_program(prog, obj) {
+ links[i] = bpf_program__attach(prog);
+ if (libbpf_get_error(links[i])) {
+ fprintf(stderr, "ERROR: bpf_program__attach failed\n");
+ links[i] = NULL;
+ goto cleanup;
+ }
+ i++;
+ }
+
+ fill_lpm_trie();
+
+ run_perf_test(nr_cpus);
+
+cleanup:
+ for (i--; i >= 0; i--)
+ bpf_link__destroy(links[i]);
+
+ bpf_object__close(obj);
+ return 0;
+}