/*
- * sync engine
+ * sync/psync engine
*
* IO engine that does regular read(2)/write(2) with lseek(2) to transfer
- * data.
+ * data and IO engine that does regular pread(2)/pwrite(2) to transfer data.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
+#include <sys/uio.h>
#include <errno.h>
#include <assert.h>
#include "../fio.h"
+/*
+ * Sync engine uses engine_data to store last offset
+ */
+#define LAST_POS(f) ((f)->engine_data)
+
+struct syncio_data {
+ struct iovec *iovecs;
+ struct io_u **io_us;
+ unsigned int queued;
+ unsigned int events;
+ unsigned long queued_bytes;
+
+ unsigned long long last_offset;
+ struct fio_file *last_file;
+ enum fio_ddir last_ddir;
+};
+
static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u)
{
struct fio_file *f = io_u->file;
- if (io_u->ddir == DDIR_SYNC)
+ if (!ddir_rw(io_u->ddir))
return 0;
- if (io_u->offset == f->last_completed_pos)
+
+ if (LAST_POS(f) != -1ULL && LAST_POS(f) == io_u->offset)
return 0;
if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) {
return 0;
}
+static int fio_io_end(struct thread_data *td, struct io_u *io_u, int ret)
+{
+ if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
+ LAST_POS(io_u->file) = io_u->offset + ret;
+
+ if (ret != (int) io_u->xfer_buflen) {
+ if (ret >= 0) {
+ io_u->resid = io_u->xfer_buflen - ret;
+ io_u->error = 0;
+ return FIO_Q_COMPLETED;
+ } else
+ io_u->error = errno;
+ }
+
+ if (io_u->error) {
+ io_u_log_error(td, io_u);
+ td_verror(td, io_u->error, "xfer");
+ }
+
+ return FIO_Q_COMPLETED;
+}
+
+#ifdef CONFIG_PWRITEV
+static int fio_pvsyncio_queue(struct thread_data *td, struct io_u *io_u)
+{
+ struct syncio_data *sd = td->io_ops->data;
+ struct iovec *iov = &sd->iovecs[0];
+ struct fio_file *f = io_u->file;
+ int ret;
+
+ fio_ro_check(td, io_u);
+
+ iov->iov_base = io_u->xfer_buf;
+ iov->iov_len = io_u->xfer_buflen;
+
+ if (io_u->ddir == DDIR_READ)
+ ret = preadv(f->fd, iov, 1, io_u->offset);
+ else if (io_u->ddir == DDIR_WRITE)
+ ret = pwritev(f->fd, iov, 1, io_u->offset);
+ else if (io_u->ddir == DDIR_TRIM) {
+ do_io_u_trim(td, io_u);
+ return FIO_Q_COMPLETED;
+ } else
+ ret = do_io_u_sync(td, io_u);
+
+ return fio_io_end(td, io_u, ret);
+}
+#endif
+
+static int fio_psyncio_queue(struct thread_data *td, struct io_u *io_u)
+{
+ struct fio_file *f = io_u->file;
+ int ret;
+
+ fio_ro_check(td, io_u);
+
+ if (io_u->ddir == DDIR_READ)
+ ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
+ else if (io_u->ddir == DDIR_WRITE)
+ ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
+ else if (io_u->ddir == DDIR_TRIM) {
+ do_io_u_trim(td, io_u);
+ return FIO_Q_COMPLETED;
+ } else
+ ret = do_io_u_sync(td, io_u);
+
+ return fio_io_end(td, io_u, ret);
+}
+
static int fio_syncio_queue(struct thread_data *td, struct io_u *io_u)
{
struct fio_file *f = io_u->file;
ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
else if (io_u->ddir == DDIR_WRITE)
ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen);
- else
- ret = fsync(f->fd);
+ else if (io_u->ddir == DDIR_TRIM) {
+ do_io_u_trim(td, io_u);
+ return FIO_Q_COMPLETED;
+ } else
+ ret = do_io_u_sync(td, io_u);
- if (ret != (int) io_u->xfer_buflen) {
- if (ret >= 0) {
- io_u->resid = io_u->xfer_buflen - ret;
+ return fio_io_end(td, io_u, ret);
+}
+
+static int fio_vsyncio_getevents(struct thread_data *td, unsigned int min,
+ unsigned int max,
+ const struct timespec fio_unused *t)
+{
+ struct syncio_data *sd = td->io_ops->data;
+ int ret;
+
+ if (min) {
+ ret = sd->events;
+ sd->events = 0;
+ } else
+ ret = 0;
+
+ dprint(FD_IO, "vsyncio_getevents: min=%d,max=%d: %d\n", min, max, ret);
+ return ret;
+}
+
+static struct io_u *fio_vsyncio_event(struct thread_data *td, int event)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ return sd->io_us[event];
+}
+
+static int fio_vsyncio_append(struct thread_data *td, struct io_u *io_u)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ if (ddir_sync(io_u->ddir))
+ return 0;
+
+ if (io_u->offset == sd->last_offset && io_u->file == sd->last_file &&
+ io_u->ddir == sd->last_ddir)
+ return 1;
+
+ return 0;
+}
+
+static void fio_vsyncio_set_iov(struct syncio_data *sd, struct io_u *io_u,
+ int idx)
+{
+ sd->io_us[idx] = io_u;
+ sd->iovecs[idx].iov_base = io_u->xfer_buf;
+ sd->iovecs[idx].iov_len = io_u->xfer_buflen;
+ sd->last_offset = io_u->offset + io_u->xfer_buflen;
+ sd->last_file = io_u->file;
+ sd->last_ddir = io_u->ddir;
+ sd->queued_bytes += io_u->xfer_buflen;
+ sd->queued++;
+}
+
+static int fio_vsyncio_queue(struct thread_data *td, struct io_u *io_u)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ fio_ro_check(td, io_u);
+
+ if (!fio_vsyncio_append(td, io_u)) {
+ dprint(FD_IO, "vsyncio_queue: no append (%d)\n", sd->queued);
+ /*
+ * If we can't append and have stuff queued, tell fio to
+ * commit those first and then retry this io
+ */
+ if (sd->queued)
+ return FIO_Q_BUSY;
+ if (ddir_sync(io_u->ddir)) {
+ int ret = do_io_u_sync(td, io_u);
+
+ return fio_io_end(td, io_u, ret);
+ }
+
+ sd->queued = 0;
+ sd->queued_bytes = 0;
+ fio_vsyncio_set_iov(sd, io_u, 0);
+ } else {
+ if (sd->queued == td->o.iodepth) {
+ dprint(FD_IO, "vsyncio_queue: max depth %d\n", sd->queued);
+ return FIO_Q_BUSY;
+ }
+
+ dprint(FD_IO, "vsyncio_queue: append\n");
+ fio_vsyncio_set_iov(sd, io_u, sd->queued);
+ }
+
+ dprint(FD_IO, "vsyncio_queue: depth now %d\n", sd->queued);
+ return FIO_Q_QUEUED;
+}
+
+/*
+ * Check that we transferred all bytes, or saw an error, etc
+ */
+static int fio_vsyncio_end(struct thread_data *td, ssize_t bytes)
+{
+ struct syncio_data *sd = td->io_ops->data;
+ struct io_u *io_u;
+ unsigned int i;
+ int err;
+
+ /*
+ * transferred everything, perfect
+ */
+ if (bytes == sd->queued_bytes)
+ return 0;
+
+ err = errno;
+ for (i = 0; i < sd->queued; i++) {
+ io_u = sd->io_us[i];
+
+ if (bytes == -1) {
+ io_u->error = err;
+ } else {
+ unsigned int this_io;
+
+ this_io = bytes;
+ if (this_io > io_u->xfer_buflen)
+ this_io = io_u->xfer_buflen;
+
+ io_u->resid = io_u->xfer_buflen - this_io;
io_u->error = 0;
- return FIO_Q_COMPLETED;
- } else
- io_u->error = errno;
+ bytes -= this_io;
+ }
}
- if (io_u->error)
- td_verror(td, io_u->error, "xfer");
+ if (bytes == -1) {
+ td_verror(td, err, "xfer vsync");
+ return -err;
+ }
- return FIO_Q_COMPLETED;
+ return 0;
+}
+
+static int fio_vsyncio_commit(struct thread_data *td)
+{
+ struct syncio_data *sd = td->io_ops->data;
+ struct fio_file *f;
+ ssize_t ret;
+
+ if (!sd->queued)
+ return 0;
+
+ io_u_mark_submit(td, sd->queued);
+ f = sd->last_file;
+
+ if (lseek(f->fd, sd->io_us[0]->offset, SEEK_SET) == -1) {
+ int err = -errno;
+
+ td_verror(td, errno, "lseek");
+ return err;
+ }
+
+ if (sd->last_ddir == DDIR_READ)
+ ret = readv(f->fd, sd->iovecs, sd->queued);
+ else
+ ret = writev(f->fd, sd->iovecs, sd->queued);
+
+ dprint(FD_IO, "vsyncio_commit: %d\n", (int) ret);
+ sd->events = sd->queued;
+ sd->queued = 0;
+ return fio_vsyncio_end(td, ret);
+}
+
+static int fio_vsyncio_init(struct thread_data *td)
+{
+ struct syncio_data *sd;
+
+ sd = malloc(sizeof(*sd));
+ memset(sd, 0, sizeof(*sd));
+ sd->last_offset = -1ULL;
+ sd->iovecs = malloc(td->o.iodepth * sizeof(struct iovec));
+ sd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
+
+ td->io_ops->data = sd;
+ return 0;
+}
+
+static void fio_vsyncio_cleanup(struct thread_data *td)
+{
+ struct syncio_data *sd = td->io_ops->data;
+
+ if (sd) {
+ free(sd->iovecs);
+ free(sd->io_us);
+ free(sd);
+ }
}
-static struct ioengine_ops ioengine = {
+static struct ioengine_ops ioengine_rw = {
.name = "sync",
.version = FIO_IOOPS_VERSION,
.prep = fio_syncio_prep,
.queue = fio_syncio_queue,
.open_file = generic_open_file,
.close_file = generic_close_file,
+ .get_file_size = generic_get_file_size,
+ .flags = FIO_SYNCIO,
+};
+
+static struct ioengine_ops ioengine_prw = {
+ .name = "psync",
+ .version = FIO_IOOPS_VERSION,
+ .queue = fio_psyncio_queue,
+ .open_file = generic_open_file,
+ .close_file = generic_close_file,
+ .get_file_size = generic_get_file_size,
+ .flags = FIO_SYNCIO,
+};
+
+static struct ioengine_ops ioengine_vrw = {
+ .name = "vsync",
+ .version = FIO_IOOPS_VERSION,
+ .init = fio_vsyncio_init,
+ .cleanup = fio_vsyncio_cleanup,
+ .queue = fio_vsyncio_queue,
+ .commit = fio_vsyncio_commit,
+ .event = fio_vsyncio_event,
+ .getevents = fio_vsyncio_getevents,
+ .open_file = generic_open_file,
+ .close_file = generic_close_file,
+ .get_file_size = generic_get_file_size,
+ .flags = FIO_SYNCIO,
+};
+
+#ifdef CONFIG_PWRITEV
+static struct ioengine_ops ioengine_pvrw = {
+ .name = "pvsync",
+ .version = FIO_IOOPS_VERSION,
+ .init = fio_vsyncio_init,
+ .cleanup = fio_vsyncio_cleanup,
+ .queue = fio_pvsyncio_queue,
+ .open_file = generic_open_file,
+ .close_file = generic_close_file,
+ .get_file_size = generic_get_file_size,
.flags = FIO_SYNCIO,
};
+#endif
static void fio_init fio_syncio_register(void)
{
- register_ioengine(&ioengine);
+ register_ioengine(&ioengine_rw);
+ register_ioengine(&ioengine_prw);
+ register_ioengine(&ioengine_vrw);
+#ifdef CONFIG_PWRITEV
+ register_ioengine(&ioengine_pvrw);
+#endif
}
static void fio_exit fio_syncio_unregister(void)
{
- unregister_ioengine(&ioengine);
+ unregister_ioengine(&ioengine_rw);
+ unregister_ioengine(&ioengine_prw);
+ unregister_ioengine(&ioengine_vrw);
+#ifdef CONFIG_PWRITEV
+ unregister_ioengine(&ioengine_pvrw);
+#endif
}
projects / fio.git / blobdiff