Commit | Line | Data |
---|---|---|
2f9ade3c JA |
1 | /* |
2 | * Memory helpers | |
3 | */ | |
5921e80c JA |
4 | #include <sys/types.h> |
5 | #include <sys/stat.h> | |
6 | #include <fcntl.h> | |
2f9ade3c | 7 | #include <unistd.h> |
2f9ade3c JA |
8 | #include <sys/mman.h> |
9 | ||
10 | #include "fio.h" | |
a5e0ee11 O |
11 | #ifndef FIO_NO_HAVE_SHM_H |
12 | #include <sys/shm.h> | |
13 | #endif | |
2f9ade3c | 14 | |
1b79a070 | 15 | void fio_unpin_memory(struct thread_data *td) |
2f9ade3c | 16 | { |
1b79a070 JA |
17 | if (td->pinned_mem) { |
18 | dprint(FD_MEM, "unpinning %llu bytes\n", td->o.lockmem); | |
19 | if (munlock(td->pinned_mem, td->o.lockmem) < 0) | |
2f9ade3c | 20 | perror("munlock"); |
1b79a070 JA |
21 | munmap(td->pinned_mem, td->o.lockmem); |
22 | td->pinned_mem = NULL; | |
2f9ade3c JA |
23 | } |
24 | } | |
25 | ||
1b79a070 | 26 | int fio_pin_memory(struct thread_data *td) |
2f9ade3c JA |
27 | { |
28 | unsigned long long phys_mem; | |
29 | ||
1b79a070 | 30 | if (!td->o.lockmem) |
2f9ade3c JA |
31 | return 0; |
32 | ||
1b79a070 | 33 | dprint(FD_MEM, "pinning %llu bytes\n", td->o.lockmem); |
ee56ad50 | 34 | |
2f9ade3c JA |
35 | /* |
36 | * Don't allow mlock of more than real_mem-128MB | |
37 | */ | |
38 | phys_mem = os_phys_mem(); | |
39 | if (phys_mem) { | |
1b79a070 JA |
40 | if ((td->o.lockmem + 128 * 1024 * 1024) > phys_mem) { |
41 | td->o.lockmem = phys_mem - 128 * 1024 * 1024; | |
b22989b9 | 42 | log_info("fio: limiting mlocked memory to %lluMB\n", |
1b79a070 | 43 | td->o.lockmem >> 20); |
2f9ade3c JA |
44 | } |
45 | } | |
46 | ||
1b79a070 | 47 | td->pinned_mem = mmap(NULL, td->o.lockmem, PROT_READ | PROT_WRITE, |
a55820db | 48 | MAP_PRIVATE | OS_MAP_ANON, -1, 0); |
1b79a070 | 49 | if (td->pinned_mem == MAP_FAILED) { |
2f9ade3c | 50 | perror("malloc locked mem"); |
1b79a070 | 51 | td->pinned_mem = NULL; |
2f9ade3c JA |
52 | return 1; |
53 | } | |
1b79a070 | 54 | if (mlock(td->pinned_mem, td->o.lockmem) < 0) { |
2f9ade3c | 55 | perror("mlock"); |
1b79a070 JA |
56 | munmap(td->pinned_mem, td->o.lockmem); |
57 | td->pinned_mem = NULL; | |
2f9ade3c JA |
58 | return 1; |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
829a602c | 64 | static int alloc_mem_shm(struct thread_data *td, unsigned int total_mem) |
2f9ade3c | 65 | { |
03e20d68 | 66 | int flags = IPC_CREAT | S_IRUSR | S_IWUSR; |
b6f9676e | 67 | |
a1242a20 JA |
68 | if (td->o.mem_type == MEM_SHMHUGE) { |
69 | unsigned long mask = td->o.hugepage_size - 1; | |
70 | ||
b6f9676e | 71 | flags |= SHM_HUGETLB; |
a1242a20 JA |
72 | total_mem = (total_mem + mask) & ~mask; |
73 | } | |
b6f9676e | 74 | |
829a602c JA |
75 | td->shm_id = shmget(IPC_PRIVATE, total_mem, flags); |
76 | dprint(FD_MEM, "shmget %u, %d\n", total_mem, td->shm_id); | |
b6f9676e JA |
77 | if (td->shm_id < 0) { |
78 | td_verror(td, errno, "shmget"); | |
da7d79b0 | 79 | if (geteuid() != 0 && (errno == ENOMEM || errno == EPERM)) |
b6f9676e | 80 | log_err("fio: you may need to run this job as root\n"); |
886b878a | 81 | if (td->o.mem_type == MEM_SHMHUGE) { |
5ec10eaa JA |
82 | if (errno == EINVAL) { |
83 | log_err("fio: check that you have free huge" | |
84 | " pages and that hugepage-size is" | |
85 | " correct.\n"); | |
86 | } else if (errno == ENOSYS) { | |
87 | log_err("fio: your system does not appear to" | |
88 | " support huge pages.\n"); | |
89 | } else if (errno == ENOMEM) { | |
90 | log_err("fio: no huge pages available, do you" | |
91 | " need to alocate some? See HOWTO.\n"); | |
92 | } | |
d8602dd0 | 93 | } |
5ec10eaa | 94 | |
b6f9676e JA |
95 | return 1; |
96 | } | |
2f9ade3c | 97 | |
b6f9676e | 98 | td->orig_buffer = shmat(td->shm_id, NULL, 0); |
ee56ad50 | 99 | dprint(FD_MEM, "shmat %d, %p\n", td->shm_id, td->orig_buffer); |
b6f9676e JA |
100 | if (td->orig_buffer == (void *) -1) { |
101 | td_verror(td, errno, "shmat"); | |
102 | td->orig_buffer = NULL; | |
103 | return 1; | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
829a602c JA |
109 | static void free_mem_shm(struct thread_data *td) |
110 | { | |
111 | struct shmid_ds sbuf; | |
112 | ||
113 | dprint(FD_MEM, "shmdt/ctl %d %p\n", td->shm_id, td->orig_buffer); | |
114 | shmdt(td->orig_buffer); | |
115 | shmctl(td->shm_id, IPC_RMID, &sbuf); | |
116 | } | |
117 | ||
0f805c00 | 118 | static int alloc_mem_mmap(struct thread_data *td, size_t total_mem) |
b6f9676e | 119 | { |
d9759b1e | 120 | int flags = 0; |
b6f9676e | 121 | |
a55820db | 122 | td->mmapfd = 1; |
b6f9676e | 123 | |
d6dc02fb JA |
124 | if (td->o.mem_type == MEM_MMAPHUGE) { |
125 | unsigned long mask = td->o.hugepage_size - 1; | |
126 | ||
d9759b1e | 127 | /* TODO: make sure the file is a real hugetlbfs file */ |
836fcc0f | 128 | if (!td->o.mmapfile) |
d9759b1e | 129 | flags |= MAP_HUGETLB; |
d6dc02fb JA |
130 | total_mem = (total_mem + mask) & ~mask; |
131 | } | |
132 | ||
83ea422a JA |
133 | if (td->o.mmapfile) { |
134 | td->mmapfd = open(td->o.mmapfile, O_RDWR|O_CREAT, 0644); | |
b6f9676e JA |
135 | |
136 | if (td->mmapfd < 0) { | |
137 | td_verror(td, errno, "open mmap file"); | |
2f9ade3c JA |
138 | td->orig_buffer = NULL; |
139 | return 1; | |
140 | } | |
d9759b1e SL |
141 | if (td->o.mem_type != MEM_MMAPHUGE && |
142 | ftruncate(td->mmapfd, total_mem) < 0) { | |
b6f9676e | 143 | td_verror(td, errno, "truncate mmap file"); |
2f9ade3c JA |
144 | td->orig_buffer = NULL; |
145 | return 1; | |
146 | } | |
d9759b1e SL |
147 | if (td->o.mem_type == MEM_MMAPHUGE) |
148 | flags |= MAP_SHARED; | |
149 | else | |
150 | flags |= MAP_PRIVATE; | |
b6f9676e | 151 | } else |
d9759b1e | 152 | flags |= OS_MAP_ANON | MAP_PRIVATE; |
b6f9676e | 153 | |
829a602c JA |
154 | td->orig_buffer = mmap(NULL, total_mem, PROT_READ | PROT_WRITE, flags, |
155 | td->mmapfd, 0); | |
4b91ee8f JA |
156 | dprint(FD_MEM, "mmap %llu/%d %p\n", (unsigned long long) total_mem, |
157 | td->mmapfd, td->orig_buffer); | |
b6f9676e JA |
158 | if (td->orig_buffer == MAP_FAILED) { |
159 | td_verror(td, errno, "mmap"); | |
160 | td->orig_buffer = NULL; | |
161 | if (td->mmapfd) { | |
162 | close(td->mmapfd); | |
83ea422a | 163 | unlink(td->o.mmapfile); |
b6f9676e | 164 | } |
5ec10eaa | 165 | |
b6f9676e | 166 | return 1; |
2f9ade3c JA |
167 | } |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
0f805c00 | 172 | static void free_mem_mmap(struct thread_data *td, size_t total_mem) |
b6f9676e | 173 | { |
4b91ee8f JA |
174 | dprint(FD_MEM, "munmap %llu %p\n", (unsigned long long) total_mem, |
175 | td->orig_buffer); | |
829a602c | 176 | munmap(td->orig_buffer, td->orig_buffer_size); |
83ea422a | 177 | if (td->o.mmapfile) { |
829a602c | 178 | close(td->mmapfd); |
83ea422a JA |
179 | unlink(td->o.mmapfile); |
180 | free(td->o.mmapfile); | |
829a602c JA |
181 | } |
182 | } | |
d87612ac | 183 | |
0f805c00 | 184 | static int alloc_mem_malloc(struct thread_data *td, size_t total_mem) |
829a602c JA |
185 | { |
186 | td->orig_buffer = malloc(total_mem); | |
4b91ee8f JA |
187 | dprint(FD_MEM, "malloc %llu %p\n", (unsigned long long) total_mem, |
188 | td->orig_buffer); | |
5ec10eaa | 189 | |
829a602c JA |
190 | return td->orig_buffer == NULL; |
191 | } | |
b6f9676e | 192 | |
829a602c JA |
193 | static void free_mem_malloc(struct thread_data *td) |
194 | { | |
195 | dprint(FD_MEM, "free malloc mem %p\n", td->orig_buffer); | |
196 | free(td->orig_buffer); | |
b6f9676e JA |
197 | } |
198 | ||
199 | /* | |
03e20d68 | 200 | * Set up the buffer area we need for io. |
b6f9676e JA |
201 | */ |
202 | int allocate_io_mem(struct thread_data *td) | |
203 | { | |
0f805c00 | 204 | size_t total_mem; |
b6f9676e JA |
205 | int ret = 0; |
206 | ||
b4c5e1ac JA |
207 | if (td->io_ops->flags & FIO_NOIO) |
208 | return 0; | |
209 | ||
829a602c | 210 | total_mem = td->orig_buffer_size; |
d529ee19 | 211 | |
d01612f3 | 212 | if (td->o.odirect || td->o.mem_align || td->o.oatomic || |
ca7e0ddb | 213 | (td->io_ops->flags & FIO_MEMALIGN)) { |
829a602c | 214 | total_mem += page_mask; |
d529ee19 JA |
215 | if (td->o.mem_align && td->o.mem_align > page_size) |
216 | total_mem += td->o.mem_align - page_size; | |
217 | } | |
829a602c | 218 | |
4b91ee8f | 219 | dprint(FD_MEM, "Alloc %llu for buffers\n", (unsigned long long) total_mem); |
0f805c00 | 220 | |
b6f9676e | 221 | if (td->o.mem_type == MEM_MALLOC) |
829a602c | 222 | ret = alloc_mem_malloc(td, total_mem); |
b6f9676e | 223 | else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) |
829a602c | 224 | ret = alloc_mem_shm(td, total_mem); |
b6f9676e | 225 | else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE) |
829a602c | 226 | ret = alloc_mem_mmap(td, total_mem); |
b6f9676e JA |
227 | else { |
228 | log_err("fio: bad mem type: %d\n", td->o.mem_type); | |
229 | ret = 1; | |
230 | } | |
231 | ||
3deb3101 JA |
232 | if (ret) |
233 | td_verror(td, ENOMEM, "iomem allocation"); | |
234 | ||
b6f9676e JA |
235 | return ret; |
236 | } | |
237 | ||
2f9ade3c JA |
238 | void free_io_mem(struct thread_data *td) |
239 | { | |
829a602c JA |
240 | unsigned int total_mem; |
241 | ||
242 | total_mem = td->orig_buffer_size; | |
d01612f3 | 243 | if (td->o.odirect || td->o.oatomic) |
829a602c JA |
244 | total_mem += page_mask; |
245 | ||
246 | if (td->o.mem_type == MEM_MALLOC) | |
247 | free_mem_malloc(td); | |
248 | else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) | |
249 | free_mem_shm(td); | |
250 | else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE) | |
251 | free_mem_mmap(td, total_mem); | |
252 | else | |
2dc1bbeb | 253 | log_err("Bad memory type %u\n", td->o.mem_type); |
2f9ade3c JA |
254 | |
255 | td->orig_buffer = NULL; | |
829a602c | 256 | td->orig_buffer_size = 0; |
2f9ade3c | 257 | } |