Commit | Line | Data |
---|---|---|
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> | |
77e63534 | 20 | #include <sys/resource.h> |
26e90931 AS |
21 | #include "libbpf.h" |
22 | #include "bpf_load.h" | |
23 | ||
24 | #define MAX_CNT 1000000 | |
25 | ||
26 | static __u64 time_get_ns(void) | |
27 | { | |
28 | struct timespec ts; | |
29 | ||
30 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
31 | return ts.tv_sec * 1000000000ull + ts.tv_nsec; | |
32 | } | |
33 | ||
34 | #define HASH_PREALLOC (1 << 0) | |
35 | #define PERCPU_HASH_PREALLOC (1 << 1) | |
36 | #define HASH_KMALLOC (1 << 2) | |
37 | #define PERCPU_HASH_KMALLOC (1 << 3) | |
38 | ||
39 | static int test_flags = ~0; | |
40 | ||
41 | static void test_hash_prealloc(int cpu) | |
42 | { | |
43 | __u64 start_time; | |
44 | int i; | |
45 | ||
46 | start_time = time_get_ns(); | |
47 | for (i = 0; i < MAX_CNT; i++) | |
48 | syscall(__NR_getuid); | |
49 | printf("%d:hash_map_perf pre-alloc %lld events per sec\n", | |
50 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
51 | } | |
52 | ||
53 | static void test_percpu_hash_prealloc(int cpu) | |
54 | { | |
55 | __u64 start_time; | |
56 | int i; | |
57 | ||
58 | start_time = time_get_ns(); | |
59 | for (i = 0; i < MAX_CNT; i++) | |
60 | syscall(__NR_geteuid); | |
61 | printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n", | |
62 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
63 | } | |
64 | ||
65 | static void test_hash_kmalloc(int cpu) | |
66 | { | |
67 | __u64 start_time; | |
68 | int i; | |
69 | ||
70 | start_time = time_get_ns(); | |
71 | for (i = 0; i < MAX_CNT; i++) | |
72 | syscall(__NR_getgid); | |
73 | printf("%d:hash_map_perf kmalloc %lld events per sec\n", | |
74 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
75 | } | |
76 | ||
77 | static void test_percpu_hash_kmalloc(int cpu) | |
78 | { | |
79 | __u64 start_time; | |
80 | int i; | |
81 | ||
82 | start_time = time_get_ns(); | |
83 | for (i = 0; i < MAX_CNT; i++) | |
84 | syscall(__NR_getegid); | |
85 | printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n", | |
86 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
87 | } | |
88 | ||
89 | static void loop(int cpu) | |
90 | { | |
91 | cpu_set_t cpuset; | |
92 | ||
93 | CPU_ZERO(&cpuset); | |
94 | CPU_SET(cpu, &cpuset); | |
95 | sched_setaffinity(0, sizeof(cpuset), &cpuset); | |
96 | ||
97 | if (test_flags & HASH_PREALLOC) | |
98 | test_hash_prealloc(cpu); | |
99 | ||
100 | if (test_flags & PERCPU_HASH_PREALLOC) | |
101 | test_percpu_hash_prealloc(cpu); | |
102 | ||
103 | if (test_flags & HASH_KMALLOC) | |
104 | test_hash_kmalloc(cpu); | |
105 | ||
106 | if (test_flags & PERCPU_HASH_KMALLOC) | |
107 | test_percpu_hash_kmalloc(cpu); | |
108 | } | |
109 | ||
110 | static void run_perf_test(int tasks) | |
111 | { | |
112 | pid_t pid[tasks]; | |
113 | int i; | |
114 | ||
115 | for (i = 0; i < tasks; i++) { | |
116 | pid[i] = fork(); | |
117 | if (pid[i] == 0) { | |
118 | loop(i); | |
119 | exit(0); | |
120 | } else if (pid[i] == -1) { | |
121 | printf("couldn't spawn #%d process\n", i); | |
122 | exit(1); | |
123 | } | |
124 | } | |
125 | for (i = 0; i < tasks; i++) { | |
126 | int status; | |
127 | ||
128 | assert(waitpid(pid[i], &status, 0) == pid[i]); | |
129 | assert(status == 0); | |
130 | } | |
131 | } | |
132 | ||
133 | int main(int argc, char **argv) | |
134 | { | |
135 | struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; | |
136 | char filename[256]; | |
137 | int num_cpu = 8; | |
138 | ||
139 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
140 | setrlimit(RLIMIT_MEMLOCK, &r); | |
141 | ||
142 | if (argc > 1) | |
143 | test_flags = atoi(argv[1]) ? : test_flags; | |
144 | ||
145 | if (argc > 2) | |
146 | num_cpu = atoi(argv[2]) ? : num_cpu; | |
147 | ||
148 | if (load_bpf_file(filename)) { | |
149 | printf("%s", bpf_log_buf); | |
150 | return 1; | |
151 | } | |
152 | ||
153 | run_perf_test(num_cpu); | |
154 | ||
155 | return 0; | |
156 | } |