10 #ifndef FIO_NO_HAVE_SHM_H
14 void fio_unpin_memory(struct thread_data *td)
17 dprint(FD_MEM, "unpinning %llu bytes\n", td->o.lockmem);
18 if (munlock(td->pinned_mem, td->o.lockmem) < 0)
20 munmap(td->pinned_mem, td->o.lockmem);
21 td->pinned_mem = NULL;
25 int fio_pin_memory(struct thread_data *td)
27 unsigned long long phys_mem;
32 dprint(FD_MEM, "pinning %llu bytes\n", td->o.lockmem);
35 * Don't allow mlock of more than real_mem-128MiB
37 phys_mem = os_phys_mem();
39 if ((td->o.lockmem + 128 * 1024 * 1024) > phys_mem) {
40 td->o.lockmem = phys_mem - 128 * 1024 * 1024;
41 log_info("fio: limiting mlocked memory to %lluMiB\n",
46 td->pinned_mem = mmap(NULL, td->o.lockmem, PROT_READ | PROT_WRITE,
47 MAP_PRIVATE | OS_MAP_ANON, -1, 0);
48 if (td->pinned_mem == MAP_FAILED) {
49 perror("malloc locked mem");
50 td->pinned_mem = NULL;
53 if (mlock(td->pinned_mem, td->o.lockmem) < 0) {
55 munmap(td->pinned_mem, td->o.lockmem);
56 td->pinned_mem = NULL;
63 static int alloc_mem_shm(struct thread_data *td, unsigned int total_mem)
66 int flags = IPC_CREAT | S_IRUSR | S_IWUSR;
68 if (td->o.mem_type == MEM_SHMHUGE) {
69 unsigned long mask = td->o.hugepage_size - 1;
72 total_mem = (total_mem + mask) & ~mask;
75 td->shm_id = shmget(IPC_PRIVATE, total_mem, flags);
76 dprint(FD_MEM, "shmget %u, %d\n", total_mem, td->shm_id);
78 td_verror(td, errno, "shmget");
79 if (geteuid() != 0 && (errno == ENOMEM || errno == EPERM))
80 log_err("fio: you may need to run this job as root\n");
81 if (td->o.mem_type == MEM_SHMHUGE) {
82 if (errno == EINVAL) {
83 log_err("fio: check that you have free huge"
84 " pages and that hugepage-size is"
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 allocate some? See HOWTO.\n");
98 td->orig_buffer = shmat(td->shm_id, NULL, 0);
99 dprint(FD_MEM, "shmat %d, %p\n", td->shm_id, td->orig_buffer);
100 if (td->orig_buffer == (void *) -1) {
101 td_verror(td, errno, "shmat");
102 td->orig_buffer = NULL;
108 log_err("fio: shm not supported\n");
113 static void free_mem_shm(struct thread_data *td)
115 #ifndef CONFIG_NO_SHM
116 struct shmid_ds sbuf;
118 dprint(FD_MEM, "shmdt/ctl %d %p\n", td->shm_id, td->orig_buffer);
119 shmdt(td->orig_buffer);
120 shmctl(td->shm_id, IPC_RMID, &sbuf);
124 static int alloc_mem_mmap(struct thread_data *td, size_t total_mem)
130 if (td->o.mem_type == MEM_MMAPHUGE) {
131 unsigned long mask = td->o.hugepage_size - 1;
133 /* TODO: make sure the file is a real hugetlbfs file */
135 flags |= MAP_HUGETLB;
136 total_mem = (total_mem + mask) & ~mask;
139 if (td->o.mmapfile) {
140 if (access(td->o.mmapfile, F_OK) == 0)
141 td->flags |= TD_F_MMAP_KEEP;
143 td->mmapfd = open(td->o.mmapfile, O_RDWR|O_CREAT, 0644);
145 if (td->mmapfd < 0) {
146 td_verror(td, errno, "open mmap file");
147 td->orig_buffer = NULL;
150 if (td->o.mem_type != MEM_MMAPHUGE &&
151 td->o.mem_type != MEM_MMAPSHARED &&
152 ftruncate(td->mmapfd, total_mem) < 0) {
153 td_verror(td, errno, "truncate mmap file");
154 td->orig_buffer = NULL;
157 if (td->o.mem_type == MEM_MMAPHUGE ||
158 td->o.mem_type == MEM_MMAPSHARED)
161 flags |= MAP_PRIVATE;
163 flags |= OS_MAP_ANON | MAP_PRIVATE;
165 td->orig_buffer = mmap(NULL, total_mem, PROT_READ | PROT_WRITE, flags,
167 dprint(FD_MEM, "mmap %llu/%d %p\n", (unsigned long long) total_mem,
168 td->mmapfd, td->orig_buffer);
169 if (td->orig_buffer == MAP_FAILED) {
170 td_verror(td, errno, "mmap");
171 td->orig_buffer = NULL;
172 if (td->mmapfd != 1 && td->mmapfd != -1) {
174 if (td->o.mmapfile && !(td->flags & TD_F_MMAP_KEEP))
175 unlink(td->o.mmapfile);
184 static void free_mem_mmap(struct thread_data *td, size_t total_mem)
186 dprint(FD_MEM, "munmap %llu %p\n", (unsigned long long) total_mem,
188 munmap(td->orig_buffer, td->orig_buffer_size);
189 if (td->o.mmapfile) {
190 if (td->mmapfd != -1)
192 if (!(td->flags & TD_F_MMAP_KEEP))
193 unlink(td->o.mmapfile);
194 free(td->o.mmapfile);
198 static int alloc_mem_malloc(struct thread_data *td, size_t total_mem)
200 td->orig_buffer = malloc(total_mem);
201 dprint(FD_MEM, "malloc %llu %p\n", (unsigned long long) total_mem,
204 return td->orig_buffer == NULL;
207 static void free_mem_malloc(struct thread_data *td)
209 dprint(FD_MEM, "free malloc mem %p\n", td->orig_buffer);
210 free(td->orig_buffer);
213 static int alloc_mem_cudamalloc(struct thread_data *td, size_t total_mem)
220 if (ret != CUDA_SUCCESS) {
221 log_err("fio: failed initialize cuda driver api\n");
225 ret = cuDeviceGetCount(&td->gpu_dev_cnt);
226 if (ret != CUDA_SUCCESS) {
227 log_err("fio: failed get device count\n");
230 dprint(FD_MEM, "found %d GPU devices\n", td->gpu_dev_cnt);
232 if (td->gpu_dev_cnt == 0) {
233 log_err("fio: no GPU device found. "
234 "Can not perform GPUDirect RDMA.\n");
238 td->gpu_dev_id = td->o.gpu_dev_id;
239 ret = cuDeviceGet(&td->cu_dev, td->gpu_dev_id);
240 if (ret != CUDA_SUCCESS) {
241 log_err("fio: failed get GPU device\n");
245 ret = cuDeviceGetName(name, sizeof(name), td->gpu_dev_id);
246 if (ret != CUDA_SUCCESS) {
247 log_err("fio: failed get device name\n");
250 dprint(FD_MEM, "dev_id = [%d], device name = [%s]\n", \
251 td->gpu_dev_id, name);
253 ret = cuCtxCreate(&td->cu_ctx, CU_CTX_MAP_HOST, td->cu_dev);
254 if (ret != CUDA_SUCCESS) {
255 log_err("fio: failed to create cuda context: %d\n", ret);
259 ret = cuMemAlloc(&td->dev_mem_ptr, total_mem);
260 if (ret != CUDA_SUCCESS) {
261 log_err("fio: cuMemAlloc %zu bytes failed\n", total_mem);
264 td->orig_buffer = (void *) td->dev_mem_ptr;
266 dprint(FD_MEM, "cudaMalloc %llu %p\n", \
267 (unsigned long long) total_mem, td->orig_buffer);
274 static void free_mem_cudamalloc(struct thread_data *td)
278 cuMemFree(td->dev_mem_ptr);
280 if (cuCtxDestroy(td->cu_ctx) != CUDA_SUCCESS)
281 log_err("fio: failed to destroy cuda context\n");
286 * Set up the buffer area we need for io.
288 int allocate_io_mem(struct thread_data *td)
293 if (td_ioengine_flagged(td, FIO_NOIO))
296 total_mem = td->orig_buffer_size;
298 if (td->o.odirect || td->o.mem_align || td->o.oatomic ||
299 td_ioengine_flagged(td, FIO_MEMALIGN)) {
300 total_mem += page_mask;
301 if (td->o.mem_align && td->o.mem_align > page_size)
302 total_mem += td->o.mem_align - page_size;
305 dprint(FD_MEM, "Alloc %llu for buffers\n", (unsigned long long) total_mem);
308 * If the IO engine has hooks to allocate/free memory and the user
309 * doesn't explicitly ask for something else, use those. But fail if the
310 * user asks for something else with an engine that doesn't allow that.
312 if (td->io_ops->iomem_alloc && fio_option_is_set(&td->o, mem_type) &&
313 !td_ioengine_flagged(td, FIO_SKIPPABLE_IOMEM_ALLOC)) {
314 log_err("fio: option 'mem/iomem' conflicts with specified IO engine\n");
316 } else if (td->io_ops->iomem_alloc &&
317 !fio_option_is_set(&td->o, mem_type))
318 ret = td->io_ops->iomem_alloc(td, total_mem);
319 else if (td->o.mem_type == MEM_MALLOC)
320 ret = alloc_mem_malloc(td, total_mem);
321 else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE)
322 ret = alloc_mem_shm(td, total_mem);
323 else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE ||
324 td->o.mem_type == MEM_MMAPSHARED)
325 ret = alloc_mem_mmap(td, total_mem);
326 else if (td->o.mem_type == MEM_CUDA_MALLOC)
327 ret = alloc_mem_cudamalloc(td, total_mem);
329 log_err("fio: bad mem type: %d\n", td->o.mem_type);
334 td_verror(td, ENOMEM, "iomem allocation");
339 void free_io_mem(struct thread_data *td)
341 unsigned int total_mem;
343 total_mem = td->orig_buffer_size;
344 if (td->o.odirect || td->o.oatomic)
345 total_mem += page_mask;
347 if (td->io_ops->iomem_alloc && !fio_option_is_set(&td->o, mem_type)) {
348 if (td->io_ops->iomem_free)
349 td->io_ops->iomem_free(td);
350 } else if (td->o.mem_type == MEM_MALLOC)
352 else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE)
354 else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE ||
355 td->o.mem_type == MEM_MMAPSHARED)
356 free_mem_mmap(td, total_mem);
357 else if (td->o.mem_type == MEM_CUDA_MALLOC)
358 free_mem_cudamalloc(td);
360 log_err("Bad memory type %u\n", td->o.mem_type);
362 td->orig_buffer = NULL;
363 td->orig_buffer_size = 0;