* IO engine using the Linux native aio interface.
*
*/
-#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
-#include <assert.h>
#include <libaio.h>
#include "../fio.h"
#include "../lib/pow2.h"
#include "../optgroup.h"
+#ifndef IOCB_FLAG_HIPRI
+#define IOCB_FLAG_HIPRI (1 << 2)
+#endif
+#ifndef IOCTX_FLAG_IOPOLL
+#define IOCTX_FLAG_IOPOLL (1 << 0)
+#endif
+#ifndef IOCTX_FLAG_USERIOCB
+#define IOCTX_FLAG_USERIOCB (1 << 1)
+#endif
+
+
static int fio_libaio_commit(struct thread_data *td);
struct libaio_data {
struct iocb **iocbs;
struct io_u **io_us;
+ struct iocb *user_iocbs;
+ struct io_u **io_u_index;
+
/*
* Basic ring buffer. 'head' is incremented in _queue(), and
* 'tail' is incremented in _commit(). We keep 'queued' so
struct libaio_options {
void *pad;
unsigned int userspace_reap;
+ unsigned int hipri;
+ unsigned int useriocb;
};
static struct fio_option options[] = {
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_LIBAIO,
},
+ {
+ .name = "hipri",
+ .lname = "High Priority",
+ .type = FIO_OPT_STR_SET,
+ .off1 = offsetof(struct libaio_options, hipri),
+ .help = "Use polled IO completions",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+ {
+ .name = "useriocb",
+ .lname = "User IOCBs",
+ .type = FIO_OPT_STR_SET,
+ .off1 = offsetof(struct libaio_options, useriocb),
+ .help = "Use user mapped IOCBs",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
{
.name = NULL,
},
static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u)
{
+ struct libaio_data *ld = td->io_ops_data;
struct fio_file *f = io_u->file;
+ struct libaio_options *o = td->eo;
+ struct iocb *iocb;
- if (io_u->ddir == DDIR_READ)
- io_prep_pread(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
- else if (io_u->ddir == DDIR_WRITE)
- io_prep_pwrite(&io_u->iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
- else if (ddir_sync(io_u->ddir))
- io_prep_fsync(&io_u->iocb, f->fd);
+ if (o->useriocb)
+ iocb = &ld->user_iocbs[io_u->index];
+ else
+ iocb = &io_u->iocb;
+
+ if (io_u->ddir == DDIR_READ) {
+ io_prep_pread(iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
+ if (o->hipri)
+ iocb->u.c.flags |= IOCB_FLAG_HIPRI;
+ } else if (io_u->ddir == DDIR_WRITE) {
+ io_prep_pwrite(iocb, f->fd, io_u->xfer_buf, io_u->xfer_buflen, io_u->offset);
+ if (o->hipri)
+ iocb->u.c.flags |= IOCB_FLAG_HIPRI;
+ } else if (ddir_sync(io_u->ddir))
+ io_prep_fsync(iocb, f->fd);
return 0;
}
static struct io_u *fio_libaio_event(struct thread_data *td, int event)
{
struct libaio_data *ld = td->io_ops_data;
+ struct libaio_options *o = td->eo;
struct io_event *ev;
struct io_u *io_u;
ev = ld->aio_events + event;
- io_u = container_of(ev->obj, struct io_u, iocb);
+ if (o->useriocb) {
+ int index = (int) (uintptr_t) ev->obj;
+ io_u = ld->io_u_index[index];
+ } else
+ io_u = container_of(ev->obj, struct io_u, iocb);
if (ev->res != io_u->xfer_buflen) {
if (ev->res > io_u->xfer_buflen)
events += r;
else if ((min && r == 0) || r == -EAGAIN) {
fio_libaio_commit(td);
- usleep(100);
+ if (actual_min)
+ usleep(10);
} else if (r != -EINTR)
break;
} while (events < min);
return r < 0 ? r : events;
}
-static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u)
+static enum fio_q_status fio_libaio_queue(struct thread_data *td,
+ struct io_u *io_u)
{
struct libaio_data *ld = td->io_ops_data;
+ struct libaio_options *o = td->eo;
fio_ro_check(td, io_u);
return FIO_Q_BUSY;
do_io_u_trim(td, io_u);
+ io_u_mark_submit(td, 1);
+ io_u_mark_complete(td, 1);
return FIO_Q_COMPLETED;
}
- ld->iocbs[ld->head] = &io_u->iocb;
+ if (o->useriocb)
+ ld->iocbs[ld->head] = (struct iocb *) (uintptr_t) io_u->index;
+ else
+ ld->iocbs[ld->head] = &io_u->iocb;
+
ld->io_us[ld->head] = io_u;
ring_inc(ld, &ld->head, 1);
ld->queued++;
static void fio_libaio_queued(struct thread_data *td, struct io_u **io_us,
unsigned int nr)
{
- struct timeval now;
+ struct timespec now;
unsigned int i;
if (!fio_fill_issue_time(td))
struct libaio_data *ld = td->io_ops_data;
struct iocb **iocbs;
struct io_u **io_us;
- struct timeval tv;
+ struct timespec ts;
int ret, wait_start = 0;
if (!ld->queued)
break;
}
if (!wait_start) {
- fio_gettime(&tv, NULL);
+ fio_gettime(&ts, NULL);
wait_start = 1;
- } else if (mtime_since_now(&tv) > 30000) {
+ } else if (mtime_since_now(&ts) > 30000) {
log_err("fio: aio appears to be stalled, giving up\n");
break;
}
free(ld->aio_events);
free(ld->iocbs);
free(ld->io_us);
+ if (ld->user_iocbs)
+ free(ld->user_iocbs);
free(ld);
}
}
+static int fio_libaio_old_queue_init(struct libaio_data *ld, unsigned int depth,
+ bool hipri, bool useriocb)
+{
+ if (hipri) {
+ log_err("fio: polled aio not available on your platform\n");
+ return 1;
+ }
+ if (useriocb) {
+ log_err("fio: user mapped iocbs not available on your platform\n");
+ return 1;
+ }
+
+ return io_queue_init(depth, &ld->aio_ctx);
+}
+
+static int fio_libaio_queue_init(struct libaio_data *ld, unsigned int depth,
+ bool hipri, bool useriocb)
+{
+#ifdef __NR_sys_io_setup2
+ int ret, flags = 0;
+
+ if (hipri)
+ flags |= IOCTX_FLAG_IOPOLL;
+ if (useriocb)
+ flags |= IOCTX_FLAG_USERIOCB;
+
+ ret = syscall(__NR_sys_io_setup2, depth, flags, ld->user_iocbs,
+ &ld->aio_ctx);
+ if (!ret)
+ return 0;
+
+ return fio_libaio_old_queue_init(ld, depth, hipri, useriocb);
+#else
+ return fio_libaio_old_queue_init(ld, depth, hipri, useriocb);
+#endif
+}
+
static int fio_libaio_init(struct thread_data *td)
{
struct libaio_options *o = td->eo;
ld = calloc(1, sizeof(*ld));
+ if (o->useriocb) {
+ size_t size;
+ void *p;
+
+ ld->io_u_index = calloc(td->o.iodepth, sizeof(struct io_u *));
+ size = td->o.iodepth * sizeof(struct iocb);
+ if (posix_memalign(&p, page_size, size)) {
+ log_err("fio: libaio iocb allocation failure\n");
+ free(ld);
+ return 1;
+ }
+ ld->user_iocbs = p;
+ }
+
/*
* First try passing in 0 for queue depth, since we don't
* care about the user ring. If that fails, the kernel is too old
* and we need the right depth.
*/
- if (!o->userspace_reap)
- err = io_queue_init(INT_MAX, &ld->aio_ctx);
- if (o->userspace_reap || err == -EINVAL)
- err = io_queue_init(td->o.iodepth, &ld->aio_ctx);
+ err = fio_libaio_queue_init(ld, td->o.iodepth, o->hipri, o->useriocb);
if (err) {
td_verror(td, -err, "io_queue_init");
log_err("fio: check /proc/sys/fs/aio-max-nr\n");
+ if (ld->user_iocbs)
+ free(ld->user_iocbs);
free(ld);
return 1;
}
return 0;
}
+static int fio_libaio_io_u_init(struct thread_data *td, struct io_u *io_u)
+{
+ struct libaio_options *o = td->eo;
+
+ if (o->useriocb) {
+ struct libaio_data *ld = td->io_ops_data;
+
+ ld->io_u_index[io_u->index] = io_u;
+ }
+
+ return 0;
+}
+
static struct ioengine_ops ioengine = {
.name = "libaio",
.version = FIO_IOOPS_VERSION,
.init = fio_libaio_init,
+ .io_u_init = fio_libaio_io_u_init,
.prep = fio_libaio_prep,
.queue = fio_libaio_queue,
.commit = fio_libaio_commit,
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