bpf: expose program stats via bpf_prog_info

Return bpf program run_time_ns and run_cnt via bpf_prog_info

Alexei Starovoitov committed 7 years ago

Commit 5f8f8b91 parent 492ecee2 files · +7 −0Browse files

Unified · Split

2 files

include/uapi/linux/bpf.h +2 −0
kernel/bpf/syscall.c +5 −0

include/uapi/linux/bpf.h+2−0

@@ -2813,6 +2813,8 @@ struct bpf_prog_info { · 2812 unmodified lines
2813	2813	__u32 jited_line_info_rec_size;
2814	2814	__u32 nr_prog_tags;
2815	2815	__aligned_u64 prog_tags;
	2816	+ __u64 run_time_ns;
	2817	+ __u64 run_cnt;
2816	2818	} __attribute__((aligned(8)));
2817	2819
2818	2820	struct bpf_map_info {

kernel/bpf/syscall.c+5−0

@@ -2152,6 +2152,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, · 2151 unmodified lines
2152	2152	struct bpf_prog_info __user *uinfo = u64_to_user_ptr(attr->info.info);
2153	2153	struct bpf_prog_info info = {};
2154	2154	u32 info_len = attr->info.info_len;
	2155	+ struct bpf_prog_stats stats;
2155	2156	char __user *uinsns;
2156	2157	u32 ulen;
2157	2158	int err;
@@ -2191,6 +2192,10 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, · 33 unmodified lines
2191	2192	if (err)
2192	2193	return err;
2193	2194
	2195	+ bpf_prog_get_stats(prog, &stats);
	2196	+ info.run_time_ns = stats.nsecs;
	2197	+ info.run_cnt = stats.cnt;
	2198	+
2194	2199	if (!capable(CAP_SYS_ADMIN)) {
2195	2200	info.jited_prog_len = 0;
2196	2201	info.xlated_prog_len = 0;