#include "../verify.h"
/*
- * Limits us to 1GB of mapped files in total
+ * Limits us to 1GiB of mapped files in total
*/
#define MMAP_TOTAL_SZ (1 * 1024 * 1024 * 1024UL)
static unsigned long mmap_map_size;
-static unsigned long mmap_map_mask;
+
+struct fio_mmap_data {
+ void *mmap_ptr;
+ size_t mmap_sz;
+ off_t mmap_off;
+};
+
+static bool fio_madvise_file(struct thread_data *td, struct fio_file *f,
+ size_t length)
+
+{
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
+
+ if (!td->o.fadvise_hint)
+ return true;
+
+ if (!td_random(td)) {
+ if (posix_madvise(fmd->mmap_ptr, length, POSIX_MADV_SEQUENTIAL) < 0) {
+ td_verror(td, errno, "madvise");
+ return false;
+ }
+ } else {
+ if (posix_madvise(fmd->mmap_ptr, length, POSIX_MADV_RANDOM) < 0) {
+ td_verror(td, errno, "madvise");
+ return false;
+ }
+ }
+
+ return true;
+}
static int fio_mmap_file(struct thread_data *td, struct fio_file *f,
size_t length, off_t off)
{
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
int flags = 0;
- if (td_rw(td))
+ if (td_rw(td) && !td->o.verify_only)
flags = PROT_READ | PROT_WRITE;
- else if (td_write(td)) {
+ else if (td_write(td) && !td->o.verify_only) {
flags = PROT_WRITE;
if (td->o.verify != VERIFY_NONE)
} else
flags = PROT_READ;
- f->mmap_ptr = mmap(NULL, length, flags, MAP_SHARED, f->fd, off);
- if (f->mmap_ptr == MAP_FAILED) {
- f->mmap_ptr = NULL;
+ fmd->mmap_ptr = mmap(NULL, length, flags, MAP_SHARED, f->fd, off);
+ if (fmd->mmap_ptr == MAP_FAILED) {
+ fmd->mmap_ptr = NULL;
td_verror(td, errno, "mmap");
goto err;
}
- if (!td_random(td)) {
- if (posix_madvise(f->mmap_ptr, length, POSIX_MADV_SEQUENTIAL) < 0) {
- td_verror(td, errno, "madvise");
- goto err;
- }
- } else {
- if (posix_madvise(f->mmap_ptr, length, POSIX_MADV_RANDOM) < 0) {
- td_verror(td, errno, "madvise");
- goto err;
- }
+ if (!fio_madvise_file(td, f, length))
+ goto err;
+
+ if (posix_madvise(fmd->mmap_ptr, length, POSIX_MADV_DONTNEED) < 0) {
+ td_verror(td, errno, "madvise");
+ goto err;
}
+#ifdef FIO_MADV_FREE
+ if (f->filetype == FIO_TYPE_BLOCK)
+ (void) posix_madvise(fmd->mmap_ptr, fmd->mmap_sz, FIO_MADV_FREE);
+#endif
+
err:
- if (td->error && f->mmap_ptr)
- munmap(f->mmap_ptr, length);
-
+ if (td->error && fmd->mmap_ptr)
+ munmap(fmd->mmap_ptr, length);
+
return td->error;
}
static int fio_mmapio_prep_limited(struct thread_data *td, struct io_u *io_u)
{
struct fio_file *f = io_u->file;
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
if (io_u->buflen > mmap_map_size) {
log_err("fio: bs too big for mmap engine\n");
return EIO;
}
- f->mmap_sz = mmap_map_size;
- if (f->mmap_sz > f->io_size)
- f->mmap_sz = f->io_size;
+ fmd->mmap_sz = mmap_map_size;
+ if (fmd->mmap_sz > f->io_size)
+ fmd->mmap_sz = f->io_size;
- f->mmap_off = io_u->offset;
+ fmd->mmap_off = io_u->offset;
- return fio_mmap_file(td, f, f->mmap_sz, f->mmap_off);
+ return fio_mmap_file(td, f, fmd->mmap_sz, fmd->mmap_off);
}
/*
static int fio_mmapio_prep_full(struct thread_data *td, struct io_u *io_u)
{
struct fio_file *f = io_u->file;
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
int ret;
if (fio_file_partial_mmap(f))
return EINVAL;
+ if (io_u->offset != (size_t) io_u->offset ||
+ f->io_size != (size_t) f->io_size) {
+ fio_file_set_partial_mmap(f);
+ return EINVAL;
+ }
- f->mmap_sz = f->io_size;
- f->mmap_off = 0;
+ fmd->mmap_sz = f->io_size;
+ fmd->mmap_off = 0;
- ret = fio_mmap_file(td, f, f->mmap_sz, f->mmap_off);
+ ret = fio_mmap_file(td, f, fmd->mmap_sz, fmd->mmap_off);
if (ret)
fio_file_set_partial_mmap(f);
static int fio_mmapio_prep(struct thread_data *td, struct io_u *io_u)
{
struct fio_file *f = io_u->file;
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
int ret;
/*
* It fits within existing mapping, use it
*/
- if (io_u->offset >= f->mmap_off &&
- io_u->offset + io_u->buflen < f->mmap_off + f->mmap_sz)
+ if (io_u->offset >= fmd->mmap_off &&
+ io_u->offset + io_u->buflen <= fmd->mmap_off + fmd->mmap_sz)
goto done;
/*
* unmap any existing mapping
*/
- if (f->mmap_ptr) {
- if (munmap(f->mmap_ptr, f->mmap_sz) < 0)
+ if (fmd->mmap_ptr) {
+ if (munmap(fmd->mmap_ptr, fmd->mmap_sz) < 0)
return errno;
- f->mmap_ptr = NULL;
+ fmd->mmap_ptr = NULL;
}
if (fio_mmapio_prep_full(td, io_u)) {
}
done:
- io_u->mmap_data = f->mmap_ptr + io_u->offset - f->mmap_off -
+ io_u->mmap_data = fmd->mmap_ptr + io_u->offset - fmd->mmap_off -
f->file_offset;
return 0;
}
static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u)
{
struct fio_file *f = io_u->file;
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
fio_ro_check(td, io_u);
else if (io_u->ddir == DDIR_WRITE)
memcpy(io_u->mmap_data, io_u->xfer_buf, io_u->xfer_buflen);
else if (ddir_sync(io_u->ddir)) {
- if (msync(f->mmap_ptr, f->mmap_sz, MS_SYNC)) {
+ if (msync(fmd->mmap_ptr, fmd->mmap_sz, MS_SYNC)) {
io_u->error = errno;
td_verror(td, io_u->error, "msync");
}
static int fio_mmapio_init(struct thread_data *td)
{
- unsigned long shift, mask;
-
- mmap_map_size = MMAP_TOTAL_SZ / td->o.nr_files;
- mask = mmap_map_size;
- shift = 0;
- do {
- mask >>= 1;
- if (!mask)
- break;
- shift++;
- } while (1);
-
- mmap_map_mask = 1UL << shift;
+ struct thread_options *o = &td->o;
+
+ if ((o->rw_min_bs & page_mask) &&
+ (o->odirect || o->fsync_blocks || o->fdatasync_blocks)) {
+ log_err("fio: mmap options dictate a minimum block size of "
+ "%llu bytes\n", (unsigned long long) page_size);
+ return 1;
+ }
+
+ mmap_map_size = MMAP_TOTAL_SZ / o->nr_files;
+ return 0;
+}
+
+static int fio_mmapio_open_file(struct thread_data *td, struct fio_file *f)
+{
+ struct fio_mmap_data *fmd;
+ int ret;
+
+ ret = generic_open_file(td, f);
+ if (ret)
+ return ret;
+
+ fmd = calloc(1, sizeof(*fmd));
+ if (!fmd) {
+ int fio_unused __ret;
+ __ret = generic_close_file(td, f);
+ return 1;
+ }
+
+ FILE_SET_ENG_DATA(f, fmd);
return 0;
}
+static int fio_mmapio_close_file(struct thread_data *td, struct fio_file *f)
+{
+ struct fio_mmap_data *fmd = FILE_ENG_DATA(f);
+
+ FILE_SET_ENG_DATA(f, NULL);
+ free(fmd);
+ fio_file_clear_partial_mmap(f);
+
+ return generic_close_file(td, f);
+}
+
static struct ioengine_ops ioengine = {
.name = "mmap",
.version = FIO_IOOPS_VERSION,
.init = fio_mmapio_init,
.prep = fio_mmapio_prep,
.queue = fio_mmapio_queue,
- .open_file = generic_open_file,
- .close_file = generic_close_file,
+ .open_file = fio_mmapio_open_file,
+ .close_file = fio_mmapio_close_file,
.get_file_size = generic_get_file_size,
.flags = FIO_SYNCIO | FIO_NOEXTEND,
};
projects / fio.git / blobdiff