1 /*
2 * Copyright © 2013 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25 #include <unistd.h>
26 #include <fcntl.h>
27 #include <errno.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31
32 #include "gem-objects.h"
33 #include "debugfs.h"
34
35 /* /sys/kernel/debug/dri/0/i915_gem_objects:
36 * 46 objects, 20107264 bytes
37 * 42 [42] objects, 15863808 [15863808] bytes in gtt
38 * 0 [0] active objects, 0 [0] bytes
39 * 42 [42] inactive objects, 15863808 [15863808] bytes
40 * 0 unbound objects, 0 bytes
41 * 3 purgeable objects, 4456448 bytes
42 * 30 pinned mappable objects, 3821568 bytes
43 * 1 fault mappable objects, 3145728 bytes
44 * 2145386496 [536870912] gtt total
45 *
46 * Xorg: 35 objects, 16347136 bytes (0 active, 12103680 inactive, 0 unbound)
47 */
48
gem_objects_init(struct gem_objects * obj)49 int gem_objects_init(struct gem_objects *obj)
50 {
51 char buf[8192], *b;
52 int fd, len;
53
54 memset(obj, 0, sizeof(*obj));
55
56 sprintf(buf, "%s/i915_gem_objects", debugfs_dri_path);
57 fd = open(buf, 0);
58 if (fd < 0)
59 return errno;
60 len = read(fd, buf+1, sizeof(buf)-2);
61 close(fd);
62
63 if (len < 0)
64 return EIO;
65
66 /* Add sentinel values for the string searches */
67 buf[0] = '\n';
68 buf[len+1] = '\0';
69
70 b = strstr(buf, "gtt total");
71 if (b == NULL)
72 return EIO;
73
74 while (*b != '\n')
75 b--;
76
77 sscanf(b, "%ld [%ld]",
78 &obj->max_gtt, &obj->max_aperture);
79
80 return 0;
81 }
82
insert_sorted(struct gem_objects * obj,struct gem_objects_comm * comm)83 static void insert_sorted(struct gem_objects *obj,
84 struct gem_objects_comm *comm)
85 {
86 struct gem_objects_comm *next, **prev;
87
88 for (prev = &obj->comm; (next = *prev) != NULL; prev = &next->next)
89 if (comm->bytes > next->bytes)
90 break;
91
92 comm->next = *prev;
93 *prev = comm;
94 }
95
gem_objects_update(struct gem_objects * obj)96 int gem_objects_update(struct gem_objects *obj)
97 {
98 char buf[8192], *b;
99 struct gem_objects_comm *comm;
100 struct gem_objects_comm *freed;
101 int fd, len, ret;
102
103 freed = obj->comm;
104 obj->comm = NULL;
105
106 sprintf(buf, "%s/i915_gem_objects", debugfs_dri_path);
107 fd = open(buf, 0);
108 if (fd < 0) {
109 ret = errno;
110 goto done;
111 }
112 len = read(fd, buf, sizeof(buf)-1);
113 close(fd);
114
115 if (len < 0) {
116 ret = EIO;
117 goto done;
118 }
119
120 buf[len] = '\0';
121 while (buf[--len] == '\n')
122 buf[len] = '\0';
123
124 b = buf;
125
126 sscanf(b, "%lu objects, %lu bytes",
127 &obj->total_count, &obj->total_bytes);
128
129 b = strchr(b, '\n');
130 sscanf(b, "%*d [%*d] objects, %lu [%lu] bytes in gtt",
131 &obj->total_gtt, &obj->total_aperture);
132
133 ret = 0;
134 b = strchr(b, ':');
135 if (b == NULL)
136 goto done;
137
138 while (*b != '\n')
139 b--;
140 b++;
141
142 do {
143 char *eol, *colon;
144
145 comm = freed;
146 if (comm)
147 freed = comm->next;
148 else
149 comm = malloc(sizeof(*comm));
150 if (comm == NULL)
151 break;
152
153 /* Xorg: 35 objects, 16347136 bytes (0 active, 12103680 inactive, 0 unbound) */
154 eol = strchr(b, '\n');
155 if (eol) {
156 do {
157 *eol++ = '\0';
158 } while (*eol == '\n');
159 }
160
161 colon = strchr(b, ':');
162 memcpy(comm->name, b, colon-b+1);
163 comm->name[colon-b+1] = '\0';
164
165 sscanf(colon + 1, "%lu objects, %lu bytes",
166 &comm->count, &comm->bytes);
167
168 insert_sorted(obj, comm);
169 b = eol;
170 } while (b != NULL);
171
172 done:
173 while (freed) {
174 comm = freed;
175 freed = comm->next;
176 free(comm);
177 }
178
179 return ret;
180 }
181