[fio.git] / memory.c

/*
 * 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)
		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_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 and the user
	 * doesn't explicitly ask for something else, use those. But fail if the
	 * user asks for something else with an engine that doesn't allow that.
	 */
	if (td->io_ops->iomem_alloc && fio_option_is_set(&td->o, mem_type) &&
	    !td_ioengine_flagged(td, FIO_SKIPPABLE_IOMEM_ALLOC)) {
		log_err("fio: option 'mem/iomem' conflicts with specified IO engine\n");
		ret = 1;
	} else if (td->io_ops->iomem_alloc &&
		   !fio_option_is_set(&td->o, mem_type))
		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)
		total_mem += page_mask;

	if (td->io_ops->iomem_alloc && !fio_option_is_set(&td->o, mem_type)) {
		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;
}
Commit	Line	Data
	1	/*
	2	* Memory helpers
	3	*/
	4	#include <fcntl.h>
	5	#include <unistd.h>
	6	#include <sys/mman.h>
	7	#include <sys/stat.h>
	8
	9	#include "fio.h"
	10	#ifndef FIO_NO_HAVE_SHM_H
	11	#include <sys/shm.h>
	12	#endif
	13
	14	void fio_unpin_memory(struct thread_data *td)
	15	{
	16	if (td->pinned_mem) {
	17	dprint(FD_MEM, "unpinning %llu bytes\n", td->o.lockmem);
	18	if (munlock(td->pinned_mem, td->o.lockmem) < 0)
	19	perror("munlock");
	20	munmap(td->pinned_mem, td->o.lockmem);
	21	td->pinned_mem = NULL;
	22	}
	23	}
	24
	25	int fio_pin_memory(struct thread_data *td)
	26	{
	27	unsigned long long phys_mem;
	28
	29	if (!td->o.lockmem)
	30	return 0;
	31
	32	dprint(FD_MEM, "pinning %llu bytes\n", td->o.lockmem);
	33
	34	/*
	35	* Don't allow mlock of more than real_mem-128MiB
	36	*/
	37	phys_mem = os_phys_mem();
	38	if (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",
	42	td->o.lockmem >> 20);
	43	}
	44	}
	45
	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;
	51	return 1;
	52	}
	53	if (mlock(td->pinned_mem, td->o.lockmem) < 0) {
	54	perror("mlock");
	55	munmap(td->pinned_mem, td->o.lockmem);
	56	td->pinned_mem = NULL;
	57	return 1;
	58	}
	59
	60	return 0;
	61	}
	62
	63	static int alloc_mem_shm(struct thread_data *td, unsigned int total_mem)
	64	{
	65	#ifndef CONFIG_NO_SHM
	66	int flags = IPC_CREAT \| S_IRUSR \| S_IWUSR;
	67
	68	if (td->o.mem_type == MEM_SHMHUGE) {
	69	unsigned long mask = td->o.hugepage_size - 1;
	70
	71	flags \|= SHM_HUGETLB;
	72	total_mem = (total_mem + mask) & ~mask;
	73	}
	74
	75	td->shm_id = shmget(IPC_PRIVATE, total_mem, flags);
	76	dprint(FD_MEM, "shmget %u, %d\n", total_mem, td->shm_id);
	77	if (td->shm_id < 0) {
	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"
	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 allocate some? See HOWTO.\n");
	92	}
	93	}
	94
	95	return 1;
	96	}
	97
	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;
	103	return 1;
	104	}
	105
	106	return 0;
	107	#else
	108	log_err("fio: shm not supported\n");
	109	return 1;
	110	#endif
	111	}
	112
	113	static void free_mem_shm(struct thread_data *td)
	114	{
	115	#ifndef CONFIG_NO_SHM
	116	struct shmid_ds sbuf;
	117
	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);
	121	#endif
	122	}
	123
	124	static int alloc_mem_mmap(struct thread_data *td, size_t total_mem)
	125	{
	126	int flags = 0;
	127
	128	td->mmapfd = -1;
	129
	130	if (td->o.mem_type == MEM_MMAPHUGE) {
	131	unsigned long mask = td->o.hugepage_size - 1;
	132
	133	/* TODO: make sure the file is a real hugetlbfs file */
	134	if (!td->o.mmapfile)
	135	flags \|= MAP_HUGETLB;
	136	total_mem = (total_mem + mask) & ~mask;
	137	}
	138
	139	if (td->o.mmapfile) {
	140	if (access(td->o.mmapfile, F_OK) == 0)
	141	td->flags \|= TD_F_MMAP_KEEP;
	142
	143	td->mmapfd = open(td->o.mmapfile, O_RDWR\|O_CREAT, 0644);
	144
	145	if (td->mmapfd < 0) {
	146	td_verror(td, errno, "open mmap file");
	147	td->orig_buffer = NULL;
	148	return 1;
	149	}
	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;
	155	return 1;
	156	}
	157	if (td->o.mem_type == MEM_MMAPHUGE \|\|
	158	td->o.mem_type == MEM_MMAPSHARED)
	159	flags \|= MAP_SHARED;
	160	else
	161	flags \|= MAP_PRIVATE;
	162	} else
	163	flags \|= OS_MAP_ANON \| MAP_PRIVATE;
	164
	165	td->orig_buffer = mmap(NULL, total_mem, PROT_READ \| PROT_WRITE, flags,
	166	td->mmapfd, 0);
	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) {
	173	close(td->mmapfd);
	174	if (td->o.mmapfile && !(td->flags & TD_F_MMAP_KEEP))
	175	unlink(td->o.mmapfile);
	176	}
	177
	178	return 1;
	179	}
	180
	181	return 0;
	182	}
	183
	184	static void free_mem_mmap(struct thread_data *td, size_t total_mem)
	185	{
	186	dprint(FD_MEM, "munmap %llu %p\n", (unsigned long long) total_mem,
	187	td->orig_buffer);
	188	munmap(td->orig_buffer, td->orig_buffer_size);
	189	if (td->o.mmapfile) {
	190	if (td->mmapfd != -1)
	191	close(td->mmapfd);
	192	if (!(td->flags & TD_F_MMAP_KEEP))
	193	unlink(td->o.mmapfile);
	194	free(td->o.mmapfile);
	195	}
	196	}
	197
	198	static int alloc_mem_malloc(struct thread_data *td, size_t total_mem)
	199	{
	200	td->orig_buffer = malloc(total_mem);
	201	dprint(FD_MEM, "malloc %llu %p\n", (unsigned long long) total_mem,
	202	td->orig_buffer);
	203
	204	return td->orig_buffer == NULL;
	205	}
	206
	207	static void free_mem_malloc(struct thread_data *td)
	208	{
	209	dprint(FD_MEM, "free malloc mem %p\n", td->orig_buffer);
	210	free(td->orig_buffer);
	211	}
	212
	213	static int alloc_mem_cudamalloc(struct thread_data *td, size_t total_mem)
	214	{
	215	#ifdef CONFIG_CUDA
	216	CUresult ret;
	217	char name[128];
	218
	219	ret = cuInit(0);
	220	if (ret != CUDA_SUCCESS) {
	221	log_err("fio: failed initialize cuda driver api\n");
	222	return 1;
	223	}
	224
	225	ret = cuDeviceGetCount(&td->gpu_dev_cnt);
	226	if (ret != CUDA_SUCCESS) {
	227	log_err("fio: failed get device count\n");
	228	return 1;
	229	}
	230	dprint(FD_MEM, "found %d GPU devices\n", td->gpu_dev_cnt);
	231
	232	if (td->gpu_dev_cnt == 0) {
	233	log_err("fio: no GPU device found. "
	234	"Can not perform GPUDirect RDMA.\n");
	235	return 1;
	236	}
	237
	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");
	242	return 1;
	243	}
	244
	245	ret = cuDeviceGetName(name, sizeof(name), td->gpu_dev_id);
	246	if (ret != CUDA_SUCCESS) {
	247	log_err("fio: failed get device name\n");
	248	return 1;
	249	}
	250	dprint(FD_MEM, "dev_id = [%d], device name = [%s]\n", \
	251	td->gpu_dev_id, name);
	252
	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);
	256	return 1;
	257	}
	258
	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);
	262	return 1;
	263	}
	264	td->orig_buffer = (void *) td->dev_mem_ptr;
	265
	266	dprint(FD_MEM, "cudaMalloc %llu %p\n", \
	267	(unsigned long long) total_mem, td->orig_buffer);
	268	return 0;
	269	#else
	270	return -EINVAL;
	271	#endif
	272	}
	273
	274	static void free_mem_cudamalloc(struct thread_data *td)
	275	{
	276	#ifdef CONFIG_CUDA
	277	if (td->dev_mem_ptr)
	278	cuMemFree(td->dev_mem_ptr);
	279
	280	if (cuCtxDestroy(td->cu_ctx) != CUDA_SUCCESS)
	281	log_err("fio: failed to destroy cuda context\n");
	282	#endif
	283	}
	284
	285	/*
	286	* Set up the buffer area we need for io.
	287	*/
	288	int allocate_io_mem(struct thread_data *td)
	289	{
	290	size_t total_mem;
	291	int ret = 0;
	292
	293	if (td_ioengine_flagged(td, FIO_NOIO))
	294	return 0;
	295
	296	total_mem = td->orig_buffer_size;
	297
	298	if (td->o.odirect \|\| td->o.mem_align \|\|
	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;
	303	}
	304
	305	dprint(FD_MEM, "Alloc %llu for buffers\n", (unsigned long long) total_mem);
	306
	307	/*
	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.
	311	*/
	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");
	315	ret = 1;
	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);
	328	else {
	329	log_err("fio: bad mem type: %d\n", td->o.mem_type);
	330	ret = 1;
	331	}
	332
	333	if (ret)
	334	td_verror(td, ENOMEM, "iomem allocation");
	335
	336	return ret;
	337	}
	338
	339	void free_io_mem(struct thread_data *td)
	340	{
	341	unsigned int total_mem;
	342
	343	total_mem = td->orig_buffer_size;
	344	if (td->o.odirect)
	345	total_mem += page_mask;
	346
	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)
	351	free_mem_malloc(td);
	352	else if (td->o.mem_type == MEM_SHM \|\| td->o.mem_type == MEM_SHMHUGE)
	353	free_mem_shm(td);
	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);
	359	else
	360	log_err("Bad memory type %u\n", td->o.mem_type);
	361
	362	td->orig_buffer = NULL;
	363	td->orig_buffer_size = 0;
	364	}