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
|
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "../../../../mm/gup_test.h"
#define MB (1UL << 20)
#define PAGE_SIZE sysconf(_SC_PAGESIZE)
/* Just the flags we need, copied from mm.h: */
#define FOLL_WRITE 0x01 /* check pte is writable */
static char *cmd_to_str(unsigned long cmd)
{
switch (cmd) {
case GUP_FAST_BENCHMARK:
return "GUP_FAST_BENCHMARK";
case PIN_FAST_BENCHMARK:
return "PIN_FAST_BENCHMARK";
case PIN_LONGTERM_BENCHMARK:
return "PIN_LONGTERM_BENCHMARK";
case GUP_BASIC_TEST:
return "GUP_BASIC_TEST";
case PIN_BASIC_TEST:
return "PIN_BASIC_TEST";
}
return "Unknown command";
}
int main(int argc, char **argv)
{
struct gup_test gup;
unsigned long size = 128 * MB;
int i, fd, filed, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0;
unsigned long cmd = GUP_FAST_BENCHMARK;
int flags = MAP_PRIVATE;
char *file = "/dev/zero";
char *p;
while ((opt = getopt(argc, argv, "m:r:n:f:abtTLUuwSH")) != -1) {
switch (opt) {
case 'a':
cmd = PIN_FAST_BENCHMARK;
break;
case 'b':
cmd = PIN_BASIC_TEST;
break;
case 'L':
cmd = PIN_LONGTERM_BENCHMARK;
break;
case 'm':
size = atoi(optarg) * MB;
break;
case 'r':
repeats = atoi(optarg);
break;
case 'n':
nr_pages = atoi(optarg);
break;
case 't':
thp = 1;
break;
case 'T':
thp = 0;
break;
case 'U':
cmd = GUP_BASIC_TEST;
break;
case 'u':
cmd = GUP_FAST_BENCHMARK;
break;
case 'w':
write = 1;
break;
case 'f':
file = optarg;
break;
case 'S':
flags &= ~MAP_PRIVATE;
flags |= MAP_SHARED;
break;
case 'H':
flags |= (MAP_HUGETLB | MAP_ANONYMOUS);
break;
default:
return -1;
}
}
filed = open(file, O_RDWR|O_CREAT);
if (filed < 0) {
perror("open");
exit(filed);
}
gup.nr_pages_per_call = nr_pages;
if (write)
gup.flags |= FOLL_WRITE;
fd = open("/sys/kernel/debug/gup_test", O_RDWR);
if (fd == -1) {
perror("open");
exit(1);
}
p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0);
if (p == MAP_FAILED) {
perror("mmap");
exit(1);
}
gup.addr = (unsigned long)p;
if (thp == 1)
madvise(p, size, MADV_HUGEPAGE);
else if (thp == 0)
madvise(p, size, MADV_NOHUGEPAGE);
for (; (unsigned long)p < gup.addr + size; p += PAGE_SIZE)
p[0] = 0;
/* Only report timing information on the *_BENCHMARK commands: */
if ((cmd == PIN_FAST_BENCHMARK) || (cmd == GUP_FAST_BENCHMARK) ||
(cmd == PIN_LONGTERM_BENCHMARK)) {
for (i = 0; i < repeats; i++) {
gup.size = size;
if (ioctl(fd, cmd, &gup))
perror("ioctl"), exit(1);
printf("%s: Time: get:%lld put:%lld us",
cmd_to_str(cmd), gup.get_delta_usec,
gup.put_delta_usec);
if (gup.size != size)
printf(", truncated (size: %lld)", gup.size);
printf("\n");
}
} else {
gup.size = size;
if (ioctl(fd, cmd, &gup)) {
perror("ioctl");
exit(1);
}
printf("%s: done\n", cmd_to_str(cmd));
if (gup.size != size)
printf("Truncated (size: %lld)\n", gup.size);
}
return 0;
}
|
