/*
* Memory helpers
*/
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <unistd.h>
#include <sys/shm.h>
#include <sys/mman.h>
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
*/
if (phys_mem) {
if ((mlock_size + 128 * 1024 * 1024) > phys_mem) {
mlock_size = phys_mem - 128 * 1024 * 1024;
- log_info("fio: limiting mlocked memory to %lluMiB\n", mlock_size >> 20);
+ log_info("fio: limiting mlocked memory to %lluMB\n",
+ mlock_size >> 20);
}
}
- pinned_mem = mmap(NULL, mlock_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | OS_MAP_ANON, 0, 0);
+ pinned_mem = mmap(NULL, mlock_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | OS_MAP_ANON, -1, 0);
if (pinned_mem == MAP_FAILED) {
perror("malloc locked mem");
pinned_mem = NULL;
return 0;
}
-static int alloc_mem_shm(struct thread_data *td)
+static int alloc_mem_shm(struct thread_data *td, unsigned int total_mem)
{
- int flags = IPC_CREAT | SHM_R | SHM_W;
+ int flags = IPC_CREAT | S_IRUSR | S_IWUSR;
+
+ if (td->o.mem_type == MEM_SHMHUGE) {
+ unsigned long mask = td->o.hugepage_size - 1;
- if (td->o.mem_type == MEM_SHMHUGE)
flags |= SHM_HUGETLB;
+ total_mem = (total_mem + mask) & ~mask;
+ }
- td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
+ 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)
+ if (geteuid() != 0 && (errno == ENOMEM || errno == EPERM))
log_err("fio: you may need to run this job as root\n");
- if (errno == EINVAL && td->o.mem_type == MEM_SHMHUGE)
- log_err("fio: check that you have free huge pages and that hugepage-size is correct.\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;
}
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 0;
}
-static int alloc_mem_mmap(struct thread_data *td)
+static void free_mem_shm(struct thread_data *td)
+{
+ 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);
+}
+
+static int alloc_mem_mmap(struct thread_data *td, size_t total_mem)
{
int flags = MAP_PRIVATE;
- td->mmapfd = 0;
+ td->mmapfd = 1;
if (td->mmapfile) {
td->mmapfd = open(td->mmapfile, O_RDWR|O_CREAT, 0644);
td->orig_buffer = NULL;
return 1;
}
- if (ftruncate(td->mmapfd, td->orig_buffer_size) < 0) {
+ if (ftruncate(td->mmapfd, total_mem) < 0) {
td_verror(td, errno, "truncate 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);
+ td->orig_buffer = mmap(NULL, total_mem, PROT_READ | PROT_WRITE, flags,
+ td->mmapfd, 0);
+ dprint(FD_MEM, "mmap %u/%d %p\n", total_mem, td->mmapfd,
+ td->orig_buffer);
if (td->orig_buffer == MAP_FAILED) {
td_verror(td, errno, "mmap");
td->orig_buffer = NULL;
close(td->mmapfd);
unlink(td->mmapfile);
}
-
+
return 1;
}
return 0;
}
-static int alloc_mem_malloc(struct thread_data *td)
+static void free_mem_mmap(struct thread_data *td, size_t total_mem)
{
- td->orig_buffer = malloc(td->orig_buffer_size);
- if (td->orig_buffer)
- return 0;
+ dprint(FD_MEM, "munmap %u %p\n", total_mem, td->orig_buffer);
+ munmap(td->orig_buffer, td->orig_buffer_size);
+ if (td->mmapfile) {
+ close(td->mmapfd);
+ unlink(td->mmapfile);
+ free(td->mmapfile);
+ }
+}
+
+static int alloc_mem_malloc(struct thread_data *td, size_t total_mem)
+{
+ td->orig_buffer = malloc(total_mem);
+ dprint(FD_MEM, "malloc %u %p\n", total_mem, td->orig_buffer);
- return 1;
+ 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);
}
/*
- * Setup the buffer area we need for io.
+ * 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->io_ops->flags & FIO_NOIO)
+ return 0;
+
+ total_mem = td->orig_buffer_size;
+
+ if (td->o.odirect || td->o.mem_align ||
+ (td->io_ops->flags & 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 %lu for buffers\n", (size_t) total_mem);
+
if (td->o.mem_type == MEM_MALLOC)
- ret = alloc_mem_malloc(td);
+ 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);
+ ret = alloc_mem_shm(td, total_mem);
else if (td->o.mem_type == MEM_MMAP || td->o.mem_type == MEM_MMAPHUGE)
- ret = alloc_mem_mmap(td);
+ ret = alloc_mem_mmap(td, total_mem);
else {
log_err("fio: bad mem type: %d\n", td->o.mem_type);
ret = 1;
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->o.mem_type == MEM_MALLOC)
- free(td->orig_buffer);
- else if (td->o.mem_type == MEM_SHM || td->o.mem_type == MEM_SHMHUGE) {
- struct shmid_ds sbuf;
-
- 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) {
- munmap(td->orig_buffer, td->orig_buffer_size);
- if (td->mmapfile) {
- close(td->mmapfd);
- unlink(td->mmapfile);
- free(td->mmapfile);
- }
- } else
+ 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)
+ free_mem_mmap(td, total_mem);
+ else
log_err("Bad memory type %u\n", td->o.mem_type);
td->orig_buffer = NULL;
+ td->orig_buffer_size = 0;
}
projects / fio.git / blobdiff