mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 00:04:15 +08:00
c58f9815ba
Replace deprecated APIs with new ones. Also mute source code using deprecated AF_XDP (xsk.h). Figuring out what to do with all the AF_XDP stuff is a separate problem that should be solved with its own set of changes. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211201232824.3166325-9-andrii@kernel.org
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#include <stdio.h>
|
|
#include <fcntl.h>
|
|
#include <poll.h>
|
|
#include <time.h>
|
|
#include <signal.h>
|
|
#include <bpf/libbpf.h>
|
|
|
|
static __u64 time_get_ns(void)
|
|
{
|
|
struct timespec ts;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
return ts.tv_sec * 1000000000ull + ts.tv_nsec;
|
|
}
|
|
|
|
static __u64 start_time;
|
|
static __u64 cnt;
|
|
|
|
#define MAX_CNT 100000ll
|
|
|
|
static void print_bpf_output(void *ctx, int cpu, void *data, __u32 size)
|
|
{
|
|
struct {
|
|
__u64 pid;
|
|
__u64 cookie;
|
|
} *e = data;
|
|
|
|
if (e->cookie != 0x12345678) {
|
|
printf("BUG pid %llx cookie %llx sized %d\n",
|
|
e->pid, e->cookie, size);
|
|
return;
|
|
}
|
|
|
|
cnt++;
|
|
|
|
if (cnt == MAX_CNT) {
|
|
printf("recv %lld events per sec\n",
|
|
MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
|
|
return;
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct bpf_link *link = NULL;
|
|
struct bpf_program *prog;
|
|
struct perf_buffer *pb;
|
|
struct bpf_object *obj;
|
|
int map_fd, ret = 0;
|
|
char filename[256];
|
|
FILE *f;
|
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.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;
|
|
}
|
|
|
|
/* load BPF program */
|
|
if (bpf_object__load(obj)) {
|
|
fprintf(stderr, "ERROR: loading BPF object file failed\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
|
|
if (map_fd < 0) {
|
|
fprintf(stderr, "ERROR: finding a map in obj file failed\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
|
|
if (libbpf_get_error(prog)) {
|
|
fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
link = bpf_program__attach(prog);
|
|
if (libbpf_get_error(link)) {
|
|
fprintf(stderr, "ERROR: bpf_program__attach failed\n");
|
|
link = NULL;
|
|
goto cleanup;
|
|
}
|
|
|
|
pb = perf_buffer__new(map_fd, 8, print_bpf_output, NULL, NULL, NULL);
|
|
ret = libbpf_get_error(pb);
|
|
if (ret) {
|
|
printf("failed to setup perf_buffer: %d\n", ret);
|
|
return 1;
|
|
}
|
|
|
|
f = popen("taskset 1 dd if=/dev/zero of=/dev/null", "r");
|
|
(void) f;
|
|
|
|
start_time = time_get_ns();
|
|
while ((ret = perf_buffer__poll(pb, 1000)) >= 0 && cnt < MAX_CNT) {
|
|
}
|
|
kill(0, SIGINT);
|
|
|
|
cleanup:
|
|
bpf_link__destroy(link);
|
|
bpf_object__close(obj);
|
|
return ret;
|
|
}
|