diff options
Diffstat (limited to 'samples/bpf/test_overhead_user.c')
| -rw-r--r-- | samples/bpf/test_overhead_user.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/samples/bpf/test_overhead_user.c b/samples/bpf/test_overhead_user.c deleted file mode 100644 index dbd86f7b1473..000000000000 --- a/samples/bpf/test_overhead_user.c +++ /dev/null @@ -1,225 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Copyright (c) 2016 Facebook - */ -#define _GNU_SOURCE -#include <sched.h> -#include <errno.h> -#include <stdio.h> -#include <sys/types.h> -#include <asm/unistd.h> -#include <fcntl.h> -#include <unistd.h> -#include <assert.h> -#include <sys/wait.h> -#include <sys/socket.h> -#include <arpa/inet.h> -#include <stdlib.h> -#include <signal.h> -#include <linux/bpf.h> -#include <string.h> -#include <time.h> -#include <bpf/bpf.h> -#include <bpf/libbpf.h> - -#define MAX_CNT 1000000 -#define DUMMY_IP "127.0.0.1" -#define DUMMY_PORT 80 - -static struct bpf_link *links[2]; -static struct bpf_object *obj; -static int cnt; - -static __u64 time_get_ns(void) -{ - struct timespec ts; - - clock_gettime(CLOCK_MONOTONIC, &ts); - return ts.tv_sec * 1000000000ull + ts.tv_nsec; -} - -static void test_task_rename(int cpu) -{ - char buf[] = "test\n"; - __u64 start_time; - int i, fd; - - fd = open("/proc/self/comm", O_WRONLY|O_TRUNC); - if (fd < 0) { - printf("couldn't open /proc\n"); - exit(1); - } - start_time = time_get_ns(); - for (i = 0; i < MAX_CNT; i++) { - if (write(fd, buf, sizeof(buf)) < 0) { - printf("task rename failed: %s\n", strerror(errno)); - close(fd); - return; - } - } - printf("task_rename:%d: %lld events per sec\n", - cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); - close(fd); -} - -static void test_fib_table_lookup(int cpu) -{ - struct sockaddr_in addr; - char buf[] = "test\n"; - __u64 start_time; - int i, fd; - - fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (fd < 0) { - printf("couldn't open socket\n"); - exit(1); - } - memset((char *)&addr, 0, sizeof(addr)); - addr.sin_addr.s_addr = inet_addr(DUMMY_IP); - addr.sin_port = htons(DUMMY_PORT); - addr.sin_family = AF_INET; - start_time = time_get_ns(); - for (i = 0; i < MAX_CNT; i++) { - if (sendto(fd, buf, strlen(buf), 0, - (struct sockaddr *)&addr, sizeof(addr)) < 0) { - printf("failed to start ping: %s\n", strerror(errno)); - close(fd); - return; - } - } - printf("fib_table_lookup:%d: %lld events per sec\n", - cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); - close(fd); -} - -static void loop(int cpu, int flags) -{ - cpu_set_t cpuset; - - CPU_ZERO(&cpuset); - CPU_SET(cpu, &cpuset); - sched_setaffinity(0, sizeof(cpuset), &cpuset); - - if (flags & 1) - test_task_rename(cpu); - if (flags & 2) - test_fib_table_lookup(cpu); -} - -static void run_perf_test(int tasks, int flags) -{ - pid_t pid[tasks]; - int i; - - for (i = 0; i < tasks; i++) { - pid[i] = fork(); - if (pid[i] == 0) { - loop(i, flags); - 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 int load_progs(char *filename) -{ - struct bpf_program *prog; - int err = 0; - - obj = bpf_object__open_file(filename, NULL); - err = libbpf_get_error(obj); - if (err < 0) { - fprintf(stderr, "ERROR: opening BPF object file failed\n"); - return err; - } - - /* load BPF program */ - err = bpf_object__load(obj); - if (err < 0) { - fprintf(stderr, "ERROR: loading BPF object file failed\n"); - return err; - } - - bpf_object__for_each_program(prog, obj) { - links[cnt] = bpf_program__attach(prog); - err = libbpf_get_error(links[cnt]); - if (err < 0) { - fprintf(stderr, "ERROR: bpf_program__attach failed\n"); - links[cnt] = NULL; - return err; - } - cnt++; - } - - return err; -} - -static void unload_progs(void) -{ - while (cnt) - bpf_link__destroy(links[--cnt]); - - bpf_object__close(obj); -} - -int main(int argc, char **argv) -{ - int num_cpu = sysconf(_SC_NPROCESSORS_ONLN); - int test_flags = ~0; - char filename[256]; - int err = 0; - - - if (argc > 1) - test_flags = atoi(argv[1]) ? : test_flags; - if (argc > 2) - num_cpu = atoi(argv[2]) ? : num_cpu; - - if (test_flags & 0x3) { - printf("BASE\n"); - run_perf_test(num_cpu, test_flags); - } - - if (test_flags & 0xC) { - snprintf(filename, sizeof(filename), - "%s_kprobe.bpf.o", argv[0]); - - printf("w/KPROBE\n"); - err = load_progs(filename); - if (!err) - run_perf_test(num_cpu, test_flags >> 2); - - unload_progs(); - } - - if (test_flags & 0x30) { - snprintf(filename, sizeof(filename), - "%s_tp.bpf.o", argv[0]); - printf("w/TRACEPOINT\n"); - err = load_progs(filename); - if (!err) - run_perf_test(num_cpu, test_flags >> 4); - - unload_progs(); - } - - if (test_flags & 0xC0) { - snprintf(filename, sizeof(filename), - "%s_raw_tp.bpf.o", argv[0]); - printf("w/RAW_TRACEPOINT\n"); - err = load_progs(filename); - if (!err) - run_perf_test(num_cpu, test_flags >> 6); - - unload_progs(); - } - - return err; -} |