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
|
/*
* Copyright © 2011 Red Hat
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Jerome Glisse <j.glisse@gmail.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "rbo.h"
#include "xf86drm.h"
/* allocate as many single page bo to try to starve the kernel
* memory zone (below highmem)
*/
void ttm_starve_kernel_private_memory(int fd)
{
struct list_head list;
struct rbo *bo, *tmp;
unsigned nbo = 0;
printf("\n[%s]\n", __func__);
list_inithead(&list);
while (1) {
bo = rbo(fd, 0, 4096, 0, NULL);
if (bo == NULL) {
printf("failing after %d bo\n", nbo);
break;
}
nbo++;
list_add(&bo->list, &list);
}
LIST_FOR_EACH_ENTRY_SAFE(bo, tmp, &list, list) {
list_del(&bo->list);
rbo_decref(bo);
}
}
int radeon_open_fd(void)
{
return drmOpen("radeon", NULL);
}
int main(void)
{
int radeonfd;
radeonfd = radeon_open_fd();
if (radeonfd < 0) {
fprintf(stderr, "failed to open radeon fd\n");
return -1;
}
ttm_starve_kernel_private_memory(radeonfd);
close(radeonfd);
return 0;
}
|
