* 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 <sys/time.h>
+#include <sys/resource.h>
#include "../fio.h"
#include "../lib/pow2.h"
#include "../optgroup.h"
+#include "../lib/memalign.h"
+#include "cmdprio.h"
+
+/* Should be defined in newest aio_abi.h */
+#ifndef IOCB_FLAG_IOPRIO
+#define IOCB_FLAG_IOPRIO (1 << 1)
+#endif
+
+/* Hack for libaio < 0.3.111 */
+#ifndef CONFIG_LIBAIO_RW_FLAGS
+#define aio_rw_flags __pad2
+#endif
static int fio_libaio_commit(struct thread_data *td);
+static int fio_libaio_init(struct thread_data *td);
struct libaio_data {
io_context_t aio_ctx;
struct iocb **iocbs;
struct io_u **io_us;
+ struct io_u **io_u_index;
+
/*
* Basic ring buffer. 'head' is incremented in _queue(), and
* 'tail' is incremented in _commit(). We keep 'queued' so
unsigned int queued;
unsigned int head;
unsigned int tail;
+
+ struct cmdprio cmdprio;
};
struct libaio_options {
- void *pad;
+ struct thread_data *td;
unsigned int userspace_reap;
+ struct cmdprio_options cmdprio_options;
+ unsigned int nowait;
};
static struct fio_option options[] = {
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_LIBAIO,
},
+#ifdef FIO_HAVE_IOPRIO_CLASS
+ {
+ .name = "cmdprio_percentage",
+ .lname = "high priority percentage",
+ .type = FIO_OPT_INT,
+ .off1 = offsetof(struct libaio_options,
+ cmdprio_options.percentage[DDIR_READ]),
+ .off2 = offsetof(struct libaio_options,
+ cmdprio_options.percentage[DDIR_WRITE]),
+ .minval = 0,
+ .maxval = 100,
+ .help = "Send high priority I/O this percentage of the time",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+ {
+ .name = "cmdprio_class",
+ .lname = "Asynchronous I/O priority class",
+ .type = FIO_OPT_INT,
+ .off1 = offsetof(struct libaio_options,
+ cmdprio_options.class[DDIR_READ]),
+ .off2 = offsetof(struct libaio_options,
+ cmdprio_options.class[DDIR_WRITE]),
+ .help = "Set asynchronous IO priority class",
+ .minval = IOPRIO_MIN_PRIO_CLASS + 1,
+ .maxval = IOPRIO_MAX_PRIO_CLASS,
+ .interval = 1,
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+ {
+ .name = "cmdprio",
+ .lname = "Asynchronous I/O priority level",
+ .type = FIO_OPT_INT,
+ .off1 = offsetof(struct libaio_options,
+ cmdprio_options.level[DDIR_READ]),
+ .off2 = offsetof(struct libaio_options,
+ cmdprio_options.level[DDIR_WRITE]),
+ .help = "Set asynchronous IO priority level",
+ .minval = IOPRIO_MIN_PRIO,
+ .maxval = IOPRIO_MAX_PRIO,
+ .interval = 1,
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+ {
+ .name = "cmdprio_bssplit",
+ .lname = "Priority percentage block size split",
+ .type = FIO_OPT_STR_STORE,
+ .off1 = offsetof(struct libaio_options,
+ cmdprio_options.bssplit_str),
+ .help = "Set priority percentages for different block sizes",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+#else
+ {
+ .name = "cmdprio_percentage",
+ .lname = "high priority percentage",
+ .type = FIO_OPT_UNSUPPORTED,
+ .help = "Your platform does not support I/O priority classes",
+ },
+ {
+ .name = "cmdprio_class",
+ .lname = "Asynchronous I/O priority class",
+ .type = FIO_OPT_UNSUPPORTED,
+ .help = "Your platform does not support I/O priority classes",
+ },
+ {
+ .name = "cmdprio",
+ .lname = "Asynchronous I/O priority level",
+ .type = FIO_OPT_UNSUPPORTED,
+ .help = "Your platform does not support I/O priority classes",
+ },
+ {
+ .name = "cmdprio_bssplit",
+ .lname = "Priority percentage block size split",
+ .type = FIO_OPT_UNSUPPORTED,
+ .help = "Your platform does not support I/O priority classes",
+ },
+#endif
+ {
+ .name = "nowait",
+ .lname = "RWF_NOWAIT",
+ .type = FIO_OPT_BOOL,
+ .off1 = offsetof(struct libaio_options, nowait),
+ .help = "Set RWF_NOWAIT for reads/writes",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
{
.name = NULL,
},
*val = (*val + add) % ld->entries;
}
-static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u)
+static int fio_libaio_prep(struct thread_data *td, struct io_u *io_u)
{
+ struct libaio_options *o = td->eo;
struct fio_file *f = io_u->file;
-
- 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);
+ struct iocb *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->nowait)
+ iocb->aio_rw_flags |= RWF_NOWAIT;
+ } 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->nowait)
+ iocb->aio_rw_flags |= RWF_NOWAIT;
+ } else if (ddir_sync(io_u->ddir))
+ io_prep_fsync(iocb, f->fd);
return 0;
}
+static inline void fio_libaio_cmdprio_prep(struct thread_data *td,
+ struct io_u *io_u)
+{
+ struct libaio_data *ld = td->io_ops_data;
+ struct cmdprio *cmdprio = &ld->cmdprio;
+
+ if (fio_cmdprio_set_ioprio(td, cmdprio, io_u)) {
+ io_u->iocb.aio_reqprio = io_u->ioprio;
+ io_u->iocb.u.c.flags |= IOCB_FLAG_IOPRIO;
+ }
+}
+
static struct io_u *fio_libaio_event(struct thread_data *td, int event)
{
struct libaio_data *ld = td->io_ops_data;
} else {
/* There is another completion to reap */
events[i] = ring->events[head];
- read_barrier();
- ring->head = (head + 1) % ring->nr;
+ atomic_store_release(&ring->head,
+ (head + 1) % ring->nr);
i++;
}
}
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;
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;
}
+ if (ld->cmdprio.mode != CMDPRIO_MODE_NONE)
+ fio_libaio_cmdprio_prep(td, io_u);
+
ld->iocbs[ld->head] = &io_u->iocb;
ld->io_us[ld->head] = io_u;
ring_inc(ld, &ld->head, 1);
*/
if (!(td->flags & TD_F_CHILD))
io_destroy(ld->aio_ctx);
+
+ fio_cmdprio_cleanup(&ld->cmdprio);
free(ld->aio_events);
free(ld->iocbs);
free(ld->io_us);
}
}
-static int fio_libaio_init(struct thread_data *td)
+static int fio_libaio_post_init(struct thread_data *td)
{
- struct libaio_options *o = td->eo;
- struct libaio_data *ld;
- int err = 0;
-
- ld = calloc(1, sizeof(*ld));
+ struct libaio_data *ld = td->io_ops_data;
+ int err;
- /*
- * 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 = io_queue_init(td->o.iodepth, &ld->aio_ctx);
if (err) {
td_verror(td, -err, "io_queue_init");
- log_err("fio: check /proc/sys/fs/aio-max-nr\n");
- free(ld);
return 1;
}
+ return 0;
+}
+
+static int fio_libaio_init(struct thread_data *td)
+{
+ struct libaio_data *ld;
+ struct libaio_options *o = td->eo;
+ int ret;
+
+ ld = calloc(1, sizeof(*ld));
+
ld->entries = td->o.iodepth;
ld->is_pow2 = is_power_of_2(ld->entries);
ld->aio_events = calloc(ld->entries, sizeof(struct io_event));
ld->io_us = calloc(ld->entries, sizeof(struct io_u *));
td->io_ops_data = ld;
+
+ ret = fio_cmdprio_init(td, &ld->cmdprio, &o->cmdprio_options);
+ if (ret) {
+ td_verror(td, EINVAL, "fio_libaio_init");
+ return 1;
+ }
+
return 0;
}
-static struct ioengine_ops ioengine = {
+FIO_STATIC struct ioengine_ops ioengine = {
.name = "libaio",
.version = FIO_IOOPS_VERSION,
+ .flags = FIO_ASYNCIO_SYNC_TRIM,
.init = fio_libaio_init,
+ .post_init = fio_libaio_post_init,
.prep = fio_libaio_prep,
.queue = fio_libaio_queue,
.commit = fio_libaio_commit,
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