Commit | Line | Data |
---|---|---|
d822a192 AS |
1 | #include <stdio.h> |
2 | #include <unistd.h> | |
3 | #include <stdlib.h> | |
4 | #include <signal.h> | |
5 | #include <linux/bpf.h> | |
ffeedafb | 6 | #include <string.h> |
55de1703 | 7 | #include <sys/resource.h> |
e00c7b21 | 8 | |
d822a192 AS |
9 | #include "libbpf.h" |
10 | #include "bpf_load.h" | |
e00c7b21 | 11 | #include "bpf_util.h" |
d822a192 AS |
12 | |
13 | #define MAX_INDEX 64 | |
14 | #define MAX_STARS 38 | |
15 | ||
16 | static void stars(char *str, long val, long max, int width) | |
17 | { | |
18 | int i; | |
19 | ||
20 | for (i = 0; i < (width * val / max) - 1 && i < width - 1; i++) | |
21 | str[i] = '*'; | |
22 | if (val > max) | |
23 | str[i - 1] = '+'; | |
24 | str[i] = '\0'; | |
25 | } | |
26 | ||
ffeedafb AS |
27 | struct task { |
28 | char comm[16]; | |
29 | __u64 pid_tgid; | |
30 | __u64 uid_gid; | |
31 | }; | |
32 | ||
33 | struct hist_key { | |
34 | struct task t; | |
35 | __u32 index; | |
36 | }; | |
37 | ||
38 | #define SIZE sizeof(struct task) | |
39 | ||
40 | static void print_hist_for_pid(int fd, void *task) | |
d822a192 | 41 | { |
e00c7b21 | 42 | unsigned int nr_cpus = bpf_num_possible_cpus(); |
ffeedafb | 43 | struct hist_key key = {}, next_key; |
3059303f | 44 | long values[nr_cpus]; |
ffeedafb | 45 | char starstr[MAX_STARS]; |
d822a192 AS |
46 | long value; |
47 | long data[MAX_INDEX] = {}; | |
d822a192 AS |
48 | int max_ind = -1; |
49 | long max_value = 0; | |
ffeedafb | 50 | int i, ind; |
d822a192 | 51 | |
d40fc181 | 52 | while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { |
ffeedafb AS |
53 | if (memcmp(&next_key, task, SIZE)) { |
54 | key = next_key; | |
55 | continue; | |
56 | } | |
d40fc181 | 57 | bpf_map_lookup_elem(fd, &next_key, values); |
3059303f AS |
58 | value = 0; |
59 | for (i = 0; i < nr_cpus; i++) | |
60 | value += values[i]; | |
ffeedafb AS |
61 | ind = next_key.index; |
62 | data[ind] = value; | |
63 | if (value && ind > max_ind) | |
64 | max_ind = ind; | |
d822a192 AS |
65 | if (value > max_value) |
66 | max_value = value; | |
ffeedafb | 67 | key = next_key; |
d822a192 AS |
68 | } |
69 | ||
70 | printf(" syscall write() stats\n"); | |
71 | printf(" byte_size : count distribution\n"); | |
72 | for (i = 1; i <= max_ind + 1; i++) { | |
73 | stars(starstr, data[i - 1], max_value, MAX_STARS); | |
74 | printf("%8ld -> %-8ld : %-8ld |%-*s|\n", | |
75 | (1l << i) >> 1, (1l << i) - 1, data[i - 1], | |
76 | MAX_STARS, starstr); | |
77 | } | |
78 | } | |
ffeedafb AS |
79 | |
80 | static void print_hist(int fd) | |
81 | { | |
82 | struct hist_key key = {}, next_key; | |
83 | static struct task tasks[1024]; | |
84 | int task_cnt = 0; | |
85 | int i; | |
86 | ||
d40fc181 | 87 | while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { |
ffeedafb AS |
88 | int found = 0; |
89 | ||
90 | for (i = 0; i < task_cnt; i++) | |
91 | if (memcmp(&tasks[i], &next_key, SIZE) == 0) | |
92 | found = 1; | |
93 | if (!found) | |
94 | memcpy(&tasks[task_cnt++], &next_key, SIZE); | |
95 | key = next_key; | |
96 | } | |
97 | ||
98 | for (i = 0; i < task_cnt; i++) { | |
99 | printf("\npid %d cmd %s uid %d\n", | |
100 | (__u32) tasks[i].pid_tgid, | |
101 | tasks[i].comm, | |
102 | (__u32) tasks[i].uid_gid); | |
103 | print_hist_for_pid(fd, &tasks[i]); | |
104 | } | |
105 | ||
106 | } | |
107 | ||
d822a192 AS |
108 | static void int_exit(int sig) |
109 | { | |
110 | print_hist(map_fd[1]); | |
111 | exit(0); | |
112 | } | |
113 | ||
114 | int main(int ac, char **argv) | |
115 | { | |
55de1703 | 116 | struct rlimit r = {1024*1024, RLIM_INFINITY}; |
d822a192 AS |
117 | char filename[256]; |
118 | long key, next_key, value; | |
119 | FILE *f; | |
120 | int i; | |
121 | ||
122 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
123 | ||
55de1703 JDB |
124 | if (setrlimit(RLIMIT_MEMLOCK, &r)) { |
125 | perror("setrlimit(RLIMIT_MEMLOCK)"); | |
126 | return 1; | |
127 | } | |
128 | ||
d822a192 | 129 | signal(SIGINT, int_exit); |
ad990dbe | 130 | signal(SIGTERM, int_exit); |
d822a192 AS |
131 | |
132 | /* start 'ping' in the background to have some kfree_skb events */ | |
133 | f = popen("ping -c5 localhost", "r"); | |
134 | (void) f; | |
135 | ||
136 | /* start 'dd' in the background to have plenty of 'write' syscalls */ | |
137 | f = popen("dd if=/dev/zero of=/dev/null count=5000000", "r"); | |
138 | (void) f; | |
139 | ||
140 | if (load_bpf_file(filename)) { | |
141 | printf("%s", bpf_log_buf); | |
142 | return 1; | |
143 | } | |
144 | ||
145 | for (i = 0; i < 5; i++) { | |
146 | key = 0; | |
d40fc181 JS |
147 | while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) { |
148 | bpf_map_lookup_elem(map_fd[0], &next_key, &value); | |
d822a192 AS |
149 | printf("location 0x%lx count %ld\n", next_key, value); |
150 | key = next_key; | |
151 | } | |
152 | if (key) | |
153 | printf("\n"); | |
154 | sleep(1); | |
155 | } | |
156 | print_hist(map_fd[1]); | |
157 | ||
158 | return 0; | |
159 | } |