FD.io VPP  v18.01.2-1-g9b554f3
Vector Packet Processing
mem_mheap.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
17 
18  Permission is hereby granted, free of charge, to any person obtaining
19  a copy of this software and associated documentation files (the
20  "Software"), to deal in the Software without restriction, including
21  without limitation the rights to use, copy, modify, merge, publish,
22  distribute, sublicense, and/or sell copies of the Software, and to
23  permit persons to whom the Software is furnished to do so, subject to
24  the following conditions:
25 
26  The above copyright notice and this permission notice shall be
27  included in all copies or substantial portions of the Software.
28 
29  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
33  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 */
37 
38 #include <vppinfra/format.h>
39 #include <vppinfra/mheap.h>
40 #include <vppinfra/os.h>
41 
42 /* Valgrind stuff. */
43 #include <vppinfra/memcheck.h>
44 #include <vppinfra/valgrind.h>
45 
47 
48 void
50 {
51  u8 *heap = clib_mem_get_per_cpu_heap ();
52  if (heap)
53  mheap_free (heap);
55 }
56 
57 /* Initialize CLIB heap based on memory/size given by user.
58  Set memory to 0 and CLIB will try to allocate its own heap. */
59 void *
61 {
62  u8 *heap;
63 
64  if (memory || memory_size)
65  heap = mheap_alloc (memory, memory_size);
66  else
67  {
68  /* Allocate lots of address space since this will limit
69  the amount of memory the program can allocate.
70  In the kernel we're more conservative since some architectures
71  (e.g. mips) have pretty small kernel virtual address spaces. */
72 #ifdef __KERNEL__
73 #define MAX_VM_MEG 64
74 #else
75 #define MAX_VM_MEG 1024
76 #endif
77 
78  uword alloc_size = MAX_VM_MEG << 20;
79  uword tries = 16;
80 
81  while (1)
82  {
83  heap = mheap_alloc (0, alloc_size);
84  if (heap)
85  break;
86  alloc_size = (alloc_size * 3) / 4;
87  tries--;
88  if (tries == 0)
89  break;
90  }
91  }
92 
93  clib_mem_set_heap (heap);
94 
95  return heap;
96 }
97 
98 #ifdef CLIB_LINUX_KERNEL
99 #include <asm/page.h>
100 
101 uword
103 {
104  return PAGE_SIZE;
105 }
106 #endif
107 
108 #ifdef CLIB_UNIX
109 uword
111 {
112  return getpagesize ();
113 }
114 #endif
115 
116 /* Make a guess for standalone. */
117 #ifdef CLIB_STANDALONE
118 uword
120 {
121  return 4096;
122 }
123 #endif
124 
125 u8 *
126 format_clib_mem_usage (u8 * s, va_list * va)
127 {
128  int verbose = va_arg (*va, int);
129  return format (s, "%U", format_mheap, clib_mem_get_heap (), verbose);
130 }
131 
132 void
134 {
136 }
137 
138 /* Call serial number for debugger breakpoints. */
140 
141 void
143 {
145  clib_warning ("clib_mem_validate disabled (small object cache is ON)");
146  else
147  {
150  }
151 }
152 
153 void
154 clib_mem_trace (int enable)
155 {
156  mheap_trace (clib_mem_get_heap (), enable);
157 }
158 
159 /*
160  * fd.io coding-style-patch-verification: ON
161  *
162  * Local Variables:
163  * eval: (c-set-style "gnu")
164  * End:
165  */
void clib_mem_usage(clib_mem_usage_t *u)
Definition: mem_mheap.c:133
u8 * format_clib_mem_usage(u8 *s, va_list *va)
Definition: mem_mheap.c:126
void * mheap_alloc(void *memory, uword size)
Definition: mheap.c:947
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
#define CLIB_MAX_MHEAPS
Definition: mem.h:52
u8 * format_mheap(u8 *s, va_list *va)
Definition: mheap.c:1162
void * clib_mem_init(void *memory, uword memory_size)
Definition: mem_mheap.c:60
vhost_user_memory_t memory
Definition: vhost-user.h:84
void * clib_per_cpu_mheaps[CLIB_MAX_MHEAPS]
Definition: mem_mheap.c:46
void mheap_usage(void *v, clib_mem_usage_t *usage)
Definition: mheap.c:1072
#define mheap_free(v)
Definition: mheap.h:62
#define MAX_VM_MEG
static void * clib_mem_get_per_cpu_heap(void)
Definition: mem.h:58
uword clib_mem_validate_serial
Definition: mem_mheap.c:139
static void * clib_mem_set_heap(void *heap)
Definition: mem.h:226
#define clib_warning(format, args...)
Definition: error.h:59
u64 memory_size
Definition: vhost-user.h:77
void clib_mem_exit(void)
Definition: mem_mheap.c:49
uword clib_mem_get_page_size(void)
Definition: mem_mheap.c:110
static void * clib_mem_get_heap(void)
Definition: mem.h:220
void mheap_trace(void *v, int enable)
Definition: mheap.c:1621
void clib_mem_trace(int enable)
Definition: mem_mheap.c:154
u64 uword
Definition: types.h:112
static void * clib_mem_set_per_cpu_heap(u8 *new_heap)
Definition: mem.h:65
#define MHEAP_HAVE_SMALL_OBJECT_CACHE
unsigned char u8
Definition: types.h:56
void clib_mem_validate(void)
Definition: mem_mheap.c:142
void mheap_validate(void *v)
Definition: mheap.c:1339