summaryrefslogtreecommitdiff
path: root/samples/bpf/map_perf_test_user.c
blob: 9505b4d112f426790645ecd00c50263620ae68e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
/* Copyright (c) 2016 Facebook
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#define _GNU_SOURCE
#include <sched.h>
#include <stdio.h>
#include <sys/types.h>
#include <asm/unistd.h>
#include <unistd.h>
#include <assert.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <signal.h>
#include <linux/bpf.h>
#include <string.h>
#include <time.h>
#include <sys/resource.h>
#include "libbpf.h"
#include "bpf_load.h"

#define MAX_CNT 1000000

static __u64 time_get_ns(void)
{
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);
	return ts.tv_sec * 1000000000ull + ts.tv_nsec;
}

#define HASH_PREALLOC		(1 << 0)
#define PERCPU_HASH_PREALLOC	(1 << 1)
#define HASH_KMALLOC		(1 << 2)
#define PERCPU_HASH_KMALLOC	(1 << 3)
#define LRU_HASH_PREALLOC	(1 << 4)
#define PERCPU_LRU_HASH_PREALLOC	(1 << 5)

static int test_flags = ~0;

static void test_hash_prealloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < MAX_CNT; i++)
		syscall(__NR_getuid);
	printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
	       cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}

static void test_lru_hash_prealloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < MAX_CNT; i++)
		syscall(__NR_getpid);
	printf("%d:lru_hash_map_perf pre-alloc %lld events per sec\n",
	       cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}

static void test_percpu_lru_hash_prealloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < MAX_CNT; i++)
		syscall(__NR_getppid);
	printf("%d:lru_hash_map_perf pre-alloc %lld events per sec\n",
	       cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}

static void test_percpu_hash_prealloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < MAX_CNT; i++)
		syscall(__NR_geteuid);
	printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
	       cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}

static void test_hash_kmalloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < MAX_CNT; i++)
		syscall(__NR_getgid);
	printf("%d:hash_map_perf kmalloc %lld events per sec\n",
	       cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}

static void test_percpu_hash_kmalloc(int cpu)
{
	__u64 start_time;
	int i;

	start_time = time_get_ns();
	for (i = 0; i < MAX_CNT; i++)
		syscall(__NR_getegid);
	printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
	       cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}

static void loop(int cpu)
{
	cpu_set_t cpuset;

	CPU_ZERO(&cpuset);
	CPU_SET(cpu, &cpuset);
	sched_setaffinity(0, sizeof(cpuset), &cpuset);

	if (test_flags & HASH_PREALLOC)
		test_hash_prealloc(cpu);

	if (test_flags & PERCPU_HASH_PREALLOC)
		test_percpu_hash_prealloc(cpu);

	if (test_flags & HASH_KMALLOC)
		test_hash_kmalloc(cpu);

	if (test_flags & PERCPU_HASH_KMALLOC)
		test_percpu_hash_kmalloc(cpu);

	if (test_flags & LRU_HASH_PREALLOC)
		test_lru_hash_prealloc(cpu);

	if (test_flags & PERCPU_LRU_HASH_PREALLOC)
		test_percpu_lru_hash_prealloc(cpu);
}

static void run_perf_test(int tasks)
{
	pid_t pid[tasks];
	int i;

	for (i = 0; i < tasks; i++) {
		pid[i] = fork();
		if (pid[i] == 0) {
			loop(i);
			exit(0);
		} else if (pid[i] == -1) {
			printf("couldn't spawn #%d process\n", i);
			exit(1);
		}
	}
	for (i = 0; i < tasks; i++) {
		int status;

		assert(waitpid(pid[i], &status, 0) == pid[i]);
		assert(status == 0);
	}
}

int main(int argc, char **argv)
{
	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
	char filename[256];
	int num_cpu = 8;

	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
	setrlimit(RLIMIT_MEMLOCK, &r);

	if (argc > 1)
		test_flags = atoi(argv[1]) ? : test_flags;

	if (argc > 2)
		num_cpu = atoi(argv[2]) ? : num_cpu;

	if (load_bpf_file(filename)) {
		printf("%s", bpf_log_buf);
		return 1;
	}

	run_perf_test(num_cpu);

	return 0;
}