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26e90931 AS |
1 | /* Copyright (c) 2016 Facebook |
2 | * | |
3 | * This program is free software; you can redistribute it and/or | |
4 | * modify it under the terms of version 2 of the GNU General Public | |
5 | * License as published by the Free Software Foundation. | |
6 | */ | |
7 | #define _GNU_SOURCE | |
8 | #include <sched.h> | |
9 | #include <stdio.h> | |
10 | #include <sys/types.h> | |
11 | #include <asm/unistd.h> | |
12 | #include <unistd.h> | |
13 | #include <assert.h> | |
14 | #include <sys/wait.h> | |
15 | #include <stdlib.h> | |
16 | #include <signal.h> | |
17 | #include <linux/bpf.h> | |
18 | #include <string.h> | |
19 | #include <time.h> | |
20 | #include "libbpf.h" | |
21 | #include "bpf_load.h" | |
22 | ||
23 | #define MAX_CNT 1000000 | |
24 | ||
25 | static __u64 time_get_ns(void) | |
26 | { | |
27 | struct timespec ts; | |
28 | ||
29 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
30 | return ts.tv_sec * 1000000000ull + ts.tv_nsec; | |
31 | } | |
32 | ||
33 | #define HASH_PREALLOC (1 << 0) | |
34 | #define PERCPU_HASH_PREALLOC (1 << 1) | |
35 | #define HASH_KMALLOC (1 << 2) | |
36 | #define PERCPU_HASH_KMALLOC (1 << 3) | |
37 | ||
38 | static int test_flags = ~0; | |
39 | ||
40 | static void test_hash_prealloc(int cpu) | |
41 | { | |
42 | __u64 start_time; | |
43 | int i; | |
44 | ||
45 | start_time = time_get_ns(); | |
46 | for (i = 0; i < MAX_CNT; i++) | |
47 | syscall(__NR_getuid); | |
48 | printf("%d:hash_map_perf pre-alloc %lld events per sec\n", | |
49 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
50 | } | |
51 | ||
52 | static void test_percpu_hash_prealloc(int cpu) | |
53 | { | |
54 | __u64 start_time; | |
55 | int i; | |
56 | ||
57 | start_time = time_get_ns(); | |
58 | for (i = 0; i < MAX_CNT; i++) | |
59 | syscall(__NR_geteuid); | |
60 | printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n", | |
61 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
62 | } | |
63 | ||
64 | static void test_hash_kmalloc(int cpu) | |
65 | { | |
66 | __u64 start_time; | |
67 | int i; | |
68 | ||
69 | start_time = time_get_ns(); | |
70 | for (i = 0; i < MAX_CNT; i++) | |
71 | syscall(__NR_getgid); | |
72 | printf("%d:hash_map_perf kmalloc %lld events per sec\n", | |
73 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
74 | } | |
75 | ||
76 | static void test_percpu_hash_kmalloc(int cpu) | |
77 | { | |
78 | __u64 start_time; | |
79 | int i; | |
80 | ||
81 | start_time = time_get_ns(); | |
82 | for (i = 0; i < MAX_CNT; i++) | |
83 | syscall(__NR_getegid); | |
84 | printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n", | |
85 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
86 | } | |
87 | ||
88 | static void loop(int cpu) | |
89 | { | |
90 | cpu_set_t cpuset; | |
91 | ||
92 | CPU_ZERO(&cpuset); | |
93 | CPU_SET(cpu, &cpuset); | |
94 | sched_setaffinity(0, sizeof(cpuset), &cpuset); | |
95 | ||
96 | if (test_flags & HASH_PREALLOC) | |
97 | test_hash_prealloc(cpu); | |
98 | ||
99 | if (test_flags & PERCPU_HASH_PREALLOC) | |
100 | test_percpu_hash_prealloc(cpu); | |
101 | ||
102 | if (test_flags & HASH_KMALLOC) | |
103 | test_hash_kmalloc(cpu); | |
104 | ||
105 | if (test_flags & PERCPU_HASH_KMALLOC) | |
106 | test_percpu_hash_kmalloc(cpu); | |
107 | } | |
108 | ||
109 | static void run_perf_test(int tasks) | |
110 | { | |
111 | pid_t pid[tasks]; | |
112 | int i; | |
113 | ||
114 | for (i = 0; i < tasks; i++) { | |
115 | pid[i] = fork(); | |
116 | if (pid[i] == 0) { | |
117 | loop(i); | |
118 | exit(0); | |
119 | } else if (pid[i] == -1) { | |
120 | printf("couldn't spawn #%d process\n", i); | |
121 | exit(1); | |
122 | } | |
123 | } | |
124 | for (i = 0; i < tasks; i++) { | |
125 | int status; | |
126 | ||
127 | assert(waitpid(pid[i], &status, 0) == pid[i]); | |
128 | assert(status == 0); | |
129 | } | |
130 | } | |
131 | ||
132 | int main(int argc, char **argv) | |
133 | { | |
134 | struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; | |
135 | char filename[256]; | |
136 | int num_cpu = 8; | |
137 | ||
138 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
139 | setrlimit(RLIMIT_MEMLOCK, &r); | |
140 | ||
141 | if (argc > 1) | |
142 | test_flags = atoi(argv[1]) ? : test_flags; | |
143 | ||
144 | if (argc > 2) | |
145 | num_cpu = atoi(argv[2]) ? : num_cpu; | |
146 | ||
147 | if (load_bpf_file(filename)) { | |
148 | printf("%s", bpf_log_buf); | |
149 | return 1; | |
150 | } | |
151 | ||
152 | run_perf_test(num_cpu); | |
153 | ||
154 | return 0; | |
155 | } |