| /* |
| * Memory helpers |
| */ |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| |
| #include "fio.h" |
| #ifndef FIO_NO_HAVE_SHM_H |
| #include <sys/shm.h> |
| #endif |
| |
| void fio_unpin_memory(struct thread_data *td) |
| { |
| if (td->pinned_mem) { |
| dprint(FD_MEM, "unpinning %llu bytes\n", td->o.lockmem); |
| if (munlock(td->pinned_mem, td->o.lockmem) < 0) |
| perror("munlock"); |
| munmap(td->pinned_mem, td->o.lockmem); |
| td->pinned_mem = NULL; |
| } |
| } |
| |
| int fio_pin_memory(struct thread_data *td) |
| { |
| unsigned long long phys_mem; |
| |
| if (!td->o.lockmem) |
| return 0; |
| |
| dprint(FD_MEM, "pinning %llu bytes\n", td->o.lockmem); |
| |
| /* |
| * Don't allow mlock of more than real_mem-128MiB |
| */ |
| phys_mem = os_phys_mem(); |
| if (phys_mem) { |
| if ((td->o.lockmem + 128 * 1024 * 1024) > phys_mem) { |
| td->o.lockmem = phys_mem - 128 * 1024 * 1024; |
| log_info("fio: limiting mlocked memory to %lluMiB\n", |
| td->o.lockmem >> 20); |
| } |
| } |
| |
| td->pinned_mem = mmap(NULL, td->o.lockmem, PROT_READ | PROT_WRITE, |
| MAP_PRIVATE | OS_MAP_ANON, -1, 0); |
| if (td->pinned_mem == MAP_FAILED) { |
| perror("malloc locked mem"); |
| td->pinned_mem = NULL; |
| return 1; |
| } |
| if (mlock(td->pinned_mem, td->o.lockmem) < 0) { |
| perror("mlock"); |
| munmap(td->pinned_mem, td->o.lockmem); |
| td->pinned_mem = NULL; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int alloc_mem_shm(struct thread_data *td, unsigned int total_mem) |
| { |
| #ifndef CONFIG_NO_SHM |
| int flags = IPC_CREAT | S_IRUSR | S_IWUSR; |
| |
| if (td->o.mem_type == MEM_SHMHUGE) { |
| unsigned long mask = td->o.hugepage_size - 1; |
| |
| flags |= SHM_HUGETLB; |
| total_mem = (total_mem + mask) & ~mask; |
| } |
| |
| td->shm_id = shmget(IPC_PRIVATE, total_mem, flags); |
| dprint(FD_MEM, "shmget %u, %d\n", total_mem, td->shm_id); |
| if (td->shm_id < 0) { |
| td_verror(td, errno, "shmget"); |
| if (geteuid() != 0 && (errno == ENOMEM || errno == EPERM)) |
| log_err("fio: you may need to run this job as root\n"); |
| if (td->o.mem_type == MEM_SHMHUGE) { |
| if (errno == EINVAL) { |
| log_err("fio: check that you have free huge" |
| " pages and that hugepage-size is" |
| " correct.\n"); |
| } else if (errno == ENOSYS) { |
| log_err("fio: your system does not appear to" |
| " support huge pages.\n"); |
| } else if (errno == ENOMEM) { |
| log_err("fio: no huge pages available, do you" |
| " need to allocate some? See HOWTO.\n"); |
| } |
| } |
| |
| return 1; |
| } |
| |
| td->orig_buffer = shmat(td->shm_id, NULL, 0); |
| dprint(FD_MEM, "shmat %d, %p\n", td->shm_id, td->orig_buffer); |
| if (td->orig_buffer == (void *) -1) { |
| td_verror(td, errno, "shmat"); |
| td->orig_buffer = NULL; |
| return 1; |
| } |
| |
| return 0; |
| #else |
| log_err("fio: shm not supported\n"); |
| return 1; |
| #endif |
| } |
| |
| static void free_mem_shm(struct thread_data *td) |
| { |
| #ifndef CONFIG_NO_SHM |
| struct shmid_ds sbuf; |
| |
| dprint(FD_MEM, "shmdt/ctl %d %p\n", td->shm_id, td->orig_buffer); |
| shmdt(td->orig_buffer); |
| shmctl(td->shm_id, IPC_RMID, &sbuf); |
| #endif |
| } |
| |
| static int alloc_mem_mmap(struct thread_data *td, size_t total_mem) |
| { |
| int flags = 0; |
| |
| td->mmapfd = -1; |
| |
| if (td->o.mem_type == MEM_MMAPHUGE) { |
| unsigned long mask = td->o.hugepage_size - 1; |
| |
| /* TODO: make sure the file is a real hugetlbfs file */ |
| if (!td->o.mmapfile) |
| flags |= MAP_HUGETLB; |
| total_mem = (total_mem + mask) & ~mask; |
| } |
| |
| if (td->o.mmapfile) { |
| if (access(td->o.mmapfile, F_OK) == 0) |
| td->flags |= TD_F_MMAP_KEEP; |
| |
| td->mmapfd = open(td->o.mmapfile, O_RDWR|O_CREAT, 0644); |
| |
| if (td->mmapfd < 0) { |
| td_verror(td, errno, "open mmap file"); |
| td->orig_buffer = NULL; |
| return 1; |
| } |
| if (td->o.mem_type != MEM_MMAPHUGE && |
| td->o.mem_type != MEM_MMAPSHARED && |
| ftruncate(td->mmapfd, total_mem) < 0) { |
| td_verror(td, errno, "truncate mmap file"); |
| td->orig_buffer = NULL; |
| return 1; |
| } |
| if (td->o.mem_type == MEM_MMAPHUGE || |
| td->o.mem_type == MEM_MMAPSHARED) |
| flags |= MAP_SHARED; |
| else |
| flags |= MAP_PRIVATE; |
| } else |
| flags |= OS_MAP_ANON | MAP_PRIVATE; |
| |
| td->orig_buffer = mmap(NULL, total_mem, PROT_READ | PROT_WRITE, flags, |
| td->mmapfd, 0); |
| dprint(FD_MEM, "mmap %llu/%d %p\n", (unsigned long long) total_mem, |
| td->mmapfd, td->orig_buffer); |
| if (td->orig_buffer == MAP_FAILED) { |
| td_verror(td, errno, "mmap"); |
| td->orig_buffer = NULL; |
| if (td->mmapfd != 1 && td->mmapfd != -1) { |
| close(td->mmapfd); |
| if (td->o.mmapfile && !(td->flags & TD_F_MMAP_KEEP)) |
| unlink(td->o.mmapfile); |
| } |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void free_mem_mmap(struct thread_data *td, size_t total_mem) |
| { |
| dprint(FD_MEM, "munmap %llu %p\n", (unsigned long long) total_mem, |
| td->orig_buffer); |
| munmap(td->orig_buffer, td->orig_buffer_size); |
| if (td->o.mmapfile) { |
| if (td->mmapfd != -1) |
| close(td->mmapfd); |
| if (!(td->flags & TD_F_MMAP_KEEP)) |
| unlink(td->o.mmapfile); |
| free(td->o.mmapfile); |
| } |
| } |
| |
| static int alloc_mem_malloc(struct thread_data *td, size_t total_mem) |
| { |
| td->orig_buffer = malloc(total_mem); |
| dprint(FD_MEM, "malloc %llu %p\n", (unsigned long long) total_mem, |
| td->orig_buffer); |
| |
| return td->orig_buffer == NULL; |
| } |
| |
| static void free_mem_malloc(struct thread_data *td) |
| { |
| dprint(FD_MEM, "free malloc mem %p\n", td->orig_buffer); |
| free(td->orig_buffer); |
| } |
| |
| static int alloc_mem_cudamalloc(struct thread_data *td, size_t total_mem) |
| { |
| #ifdef CONFIG_CUDA |
| CUresult ret; |
| char name[128]; |
| |
| ret = cuInit(0); |
| if (ret != CUDA_SUCCESS) { |
| log_err("fio: failed initialize cuda driver api\n"); |
| return 1; |
| } |
| |
| ret = cuDeviceGetCount(&td->gpu_dev_cnt); |
| if (ret != CUDA_SUCCESS) { |
| log_err("fio: failed get device count\n"); |
| return 1; |
| } |
| dprint(FD_MEM, "found %d GPU devices\n", td->gpu_dev_cnt); |
| |
| if (td->gpu_dev_cnt == 0) { |
| log_err("fio: no GPU device found. " |
| "Can not perform GPUDirect RDMA.\n"); |
| return 1; |
| } |
| |
| td->gpu_dev_id = td->o.gpu_dev_id; |
| ret = cuDeviceGet(&td->cu_dev, td->gpu_dev_id); |
| if (ret != CUDA_SUCCESS) { |
| log_err("fio: failed get GPU device\n"); |
| return 1; |
| } |
| |
| ret = cuDeviceGetName(name, sizeof(name), td->gpu_dev_id); |
| if (ret != CUDA_SUCCESS) { |
| log_err("fio: failed get device name\n"); |
| return 1; |
| } |
| dprint(FD_MEM, "dev_id = [%d], device name = [%s]\n", \ |
| td->gpu_dev_id, name); |
| |
| ret = cuCtxCreate(&td->cu_ctx, CU_CTX_MAP_HOST, td->cu_dev); |
| if (ret != CUDA_SUCCESS) { |
| log_err("fio: failed to create cuda context: %d\n", ret); |
| return 1; |
| } |
| |
| ret = cuMemAlloc(&td->dev_mem_ptr, total_mem); |
| if (ret != CUDA_SUCCESS) { |
| log_err("fio: cuMemAlloc %zu bytes failed\n", total_mem); |
| return 1; |
| } |
| td->orig_buffer = (void *) td->dev_mem_ptr; |
| |
| dprint(FD_MEM, "cudaMalloc %llu %p\n", \ |
| (unsigned long long) total_mem, td->orig_buffer); |
| return 0; |
| #else |
| return -EINVAL; |
| #endif |
| } |
| |
| static void free_mem_cudamalloc(struct thread_data *td) |
| { |
| #ifdef CONFIG_CUDA |
| if (td->dev_mem_ptr != NULL) |
| cuMemFree(td->dev_mem_ptr); |
| |
| if (cuCtxDestroy(td->cu_ctx) != CUDA_SUCCESS) |
| log_err("fio: failed to destroy cuda context\n"); |
| #endif |
| } |
| |
| /* |
| * Set up the buffer area we need for io. |
| */ |
| int allocate_io_mem(struct thread_data *td) |
| { |
| size_t total_mem; |
| int ret = 0; |
| |
| if (td_ioengine_flagged(td, FIO_NOIO)) |
| return 0; |
| |
| total_mem = td->orig_buffer_size; |
| |
| if (td->o.odirect || td->o.mem_align || td->o.oatomic || |
| td_ioengine_flagged(td, FIO_MEMALIGN)) { |
| total_mem += page_mask; |
| if (td->o.mem_align && td->o.mem_align > page_size) |
| total_mem += td->o.mem_align - page_size; |
| } |
| |
| dprint(FD_MEM, "Alloc %llu for buffers\n", (unsigned long long) total_mem); |
| |
| /* |
| * If the IO engine has hooks to allocate/free memory, use those. But |
| * error out if the user explicitly asked for something else. |
| */ |
| if (td->io_ops->iomem_alloc) { |
| if (fio_option_is_set(&td->o, mem_type)) { |
| log_err("fio: option 'mem/iomem' conflicts with specified IO engine\n"); |
| ret = 1; |
| } else |
| ret = td->io_ops->iomem_alloc(td, total_mem); |
| } else if (td->o.mem_type == MEM_MALLOC) |
| ret = alloc_mem_malloc(td, total_mem); |
| else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) |
| ret = alloc_mem_shm(td, total_mem); |
| else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE || |
| td->o.mem_type == MEM_MMAPSHARED) |
| ret = alloc_mem_mmap(td, total_mem); |
| else if (td->o.mem_type == MEM_CUDA_MALLOC) |
| ret = alloc_mem_cudamalloc(td, total_mem); |
| else { |
| log_err("fio: bad mem type: %d\n", td->o.mem_type); |
| ret = 1; |
| } |
| |
| if (ret) |
| td_verror(td, ENOMEM, "iomem allocation"); |
| |
| return ret; |
| } |
| |
| void free_io_mem(struct thread_data *td) |
| { |
| unsigned int total_mem; |
| |
| total_mem = td->orig_buffer_size; |
| if (td->o.odirect || td->o.oatomic) |
| total_mem += page_mask; |
| |
| if (td->io_ops->iomem_alloc) { |
| if (td->io_ops->iomem_free) |
| td->io_ops->iomem_free(td); |
| } else if (td->o.mem_type == MEM_MALLOC) |
| free_mem_malloc(td); |
| else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) |
| free_mem_shm(td); |
| else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE || |
| td->o.mem_type == MEM_MMAPSHARED) |
| free_mem_mmap(td, total_mem); |
| else if (td->o.mem_type == MEM_CUDA_MALLOC) |
| free_mem_cudamalloc(td); |
| else |
| log_err("Bad memory type %u\n", td->o.mem_type); |
| |
| td->orig_buffer = NULL; |
| td->orig_buffer_size = 0; |
| } |