#include <sys/mman.h>
#include "fio.h"
-#include "os.h"
static void *pinned_mem;
void fio_unpin_memory(void)
{
if (pinned_mem) {
+ dprint(FD_MEM, "unpinning %llu bytes\n", mlock_size);
if (munlock(pinned_mem, mlock_size) < 0)
perror("munlock");
munmap(pinned_mem, mlock_size);
if (!mlock_size)
return 0;
+ dprint(FD_MEM, "pinning %llu bytes\n", mlock_size);
+
/*
* Don't allow mlock of more than real_mem-128MB
*/
return 0;
}
-/*
- * Setup the buffer area we need for io.
- */
-int allocate_io_mem(struct thread_data *td)
+static int alloc_mem_shm(struct thread_data *td)
{
- if (td->o.mem_type == MEM_MALLOC)
- td->orig_buffer = malloc(td->orig_buffer_size);
- else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
- int flags = IPC_CREAT | SHM_R | SHM_W;
+ int flags = IPC_CREAT | SHM_R | SHM_W;
+
+ if (td->o.mem_type == MEM_SHMHUGE)
+ flags |= SHM_HUGETLB;
+
+ td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
+ dprint(FD_MEM, "shmget %zu, %d\n", td->orig_buffer_size, td->shm_id);
+ if (td->shm_id < 0) {
+ td_verror(td, errno, "shmget");
+ if (geteuid() != 0 && errno == ENOMEM)
+ 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 alocate some? See HOWTO.\n");
+ }
+
+ return 1;
+ }
- if (td->o.mem_type == MEM_SHMHUGE)
- flags |= SHM_HUGETLB;
+ 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;
+ }
- td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
- if (td->shm_id < 0) {
- td_verror(td, errno, "shmget");
- perror("shmget");
- return 1;
- }
+ return 0;
+}
+
+static int alloc_mem_mmap(struct thread_data *td)
+{
+ int flags = MAP_PRIVATE;
+
+ td->mmapfd = 0;
+
+ if (td->mmapfile) {
+ td->mmapfd = open(td->mmapfile, O_RDWR|O_CREAT, 0644);
- td->orig_buffer = shmat(td->shm_id, NULL, 0);
- if (td->orig_buffer == (void *) -1) {
- td_verror(td, errno, "shmat");
- perror("shmat");
+ if (td->mmapfd < 0) {
+ td_verror(td, errno, "open mmap file");
td->orig_buffer = NULL;
return 1;
}
- } else if (td->o.mem_type == MEM_MMAP ||
- td->o.mem_type == MEM_MMAPHUGE) {
- int flags = MAP_PRIVATE;
-
- td->mmapfd = 0;
-
- if (td->mmapfile) {
- td->mmapfd = open(td->mmapfile, O_RDWR|O_CREAT, 0644);
-
- if (td->mmapfd < 0) {
- td_verror(td, errno, "open");
- perror("open mmap file");
- td->orig_buffer = NULL;
- return 1;
- }
- } else
- flags |= OS_MAP_ANON;
-
- td->orig_buffer = mmap(NULL, td->orig_buffer_size, PROT_READ | PROT_WRITE, flags, td->mmapfd, 0);
- if (td->orig_buffer == MAP_FAILED) {
- td_verror(td, errno, "mmap");
- perror("mmap");
+ if (ftruncate(td->mmapfd, td->orig_buffer_size) < 0) {
+ td_verror(td, errno, "truncate mmap file");
td->orig_buffer = NULL;
- if (td->mmapfd) {
- close(td->mmapfd);
- unlink(td->mmapfile);
- }
-
return 1;
}
+ } else
+ flags |= OS_MAP_ANON;
+
+ td->orig_buffer = mmap(NULL, td->orig_buffer_size, PROT_READ | PROT_WRITE, flags, td->mmapfd, 0);
+ dprint(FD_MEM, "mmap %zu/%d %p\n", td->orig_buffer_size, td->mmapfd,
+ td->orig_buffer);
+ if (td->orig_buffer == MAP_FAILED) {
+ td_verror(td, errno, "mmap");
+ td->orig_buffer = NULL;
+ if (td->mmapfd) {
+ close(td->mmapfd);
+ unlink(td->mmapfile);
+ }
+
+ return 1;
}
return 0;
}
-void free_io_mem(struct thread_data *td)
+static int alloc_mem_malloc(struct thread_data *td)
+{
+ unsigned int bsize = td->orig_buffer_size;
+
+ if (td->o.odirect)
+ bsize += page_mask;
+
+ td->orig_buffer = malloc(bsize);
+ dprint(FD_MEM, "malloc %u %p\n", bsize, td->orig_buffer);
+ if (td->orig_buffer)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Setup the buffer area we need for io.
+ */
+int allocate_io_mem(struct thread_data *td)
{
+ int ret = 0;
+
+ if (td->io_ops->flags & FIO_NOIO)
+ return 0;
+
if (td->o.mem_type == MEM_MALLOC)
+ ret = alloc_mem_malloc(td);
+ else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE)
+ ret = alloc_mem_shm(td);
+ else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE)
+ ret = alloc_mem_mmap(td);
+ 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)
+{
+ if (td->o.mem_type == MEM_MALLOC) {
+ dprint(FD_MEM, "free mem %p\n", td->orig_buffer);
free(td->orig_buffer);
- else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
+ } else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
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);
} else if (td->o.mem_type == MEM_MMAP ||
td->o.mem_type == MEM_MMAPHUGE) {
+ dprint(FD_MEM, "munmap %zu %p\n", td->orig_buffer_size,
+ td->orig_buffer);
munmap(td->orig_buffer, td->orig_buffer_size);
if (td->mmapfile) {
close(td->mmapfd);
projects / fio.git / blobdiff