/*
- * native linux aio io engine
+ * libaio engine
+ *
+ * IO engine using the Linux native aio interface.
*
*/
#include <stdio.h>
#include <assert.h>
#include "../fio.h"
-#include "../os.h"
#ifdef FIO_HAVE_LIBAIO
return io_u;
}
-static int fio_libaio_getevents(struct thread_data *td, int min, int max,
- struct timespec *t)
+static int fio_libaio_getevents(struct thread_data *td, unsigned int min,
+ unsigned int max, struct timespec *t)
{
struct libaio_data *ld = td->io_ops->data;
long r;
{
struct libaio_data *ld = td->io_ops->data;
- if (ld->iocbs_nr == (int) td->iodepth)
+ fio_ro_check(td, io_u);
+
+ if (ld->iocbs_nr == (int) td->o.iodepth)
return FIO_Q_BUSY;
/*
struct libaio_data *ld = td->io_ops->data;
struct iocb **iocbs;
struct io_u **io_us;
- int ret, iocbs_nr;
+ int ret;
if (!ld->iocbs_nr)
return 0;
- iocbs_nr = ld->iocbs_nr;
io_us = ld->io_us;
iocbs = ld->iocbs;
do {
- ret = io_submit(ld->aio_ctx, iocbs_nr, iocbs);
- if (ret == iocbs_nr) {
- fio_libaio_queued(td, io_us, ret);
- ret = 0;
- break;
- } else if (ret > 0) {
+ ret = io_submit(ld->aio_ctx, ld->iocbs_nr, iocbs);
+ if (ret > 0) {
fio_libaio_queued(td, io_us, ret);
+ io_u_mark_submit(td, ret);
+ ld->iocbs_nr -= ret;
io_us += ret;
iocbs += ret;
- iocbs_nr -= ret;
- continue;
- } else if (ret == -EAGAIN || !ret)
- usleep(100);
- else if (ret == -EINTR)
+ ret = 0;
+ } else if (!ret || ret == -EAGAIN || ret == -EINTR) {
+ if (!ret)
+ io_u_mark_submit(td, ret);
continue;
- else
+ } else
break;
- } while (1);
-
- if (!ret)
- ld->iocbs_nr = 0;
+ } while (ld->iocbs_nr);
return ret;
}
free(ld->iocbs);
free(ld->io_us);
free(ld);
- td->io_ops->data = NULL;
}
}
static int fio_libaio_init(struct thread_data *td)
{
struct libaio_data *ld = malloc(sizeof(*ld));
+ static int warn_print;
+ int err;
+
+ if (td->o.iodepth > 1 && !td->o.odirect && !warn_print) {
+ log_info("fio: libaio engine is only async for non-buffered IO\n");
+ warn_print = 1;
+ }
memset(ld, 0, sizeof(*ld));
- if (io_queue_init(td->iodepth, &ld->aio_ctx)) {
- td_verror(td, errno, "io_queue_init");
+
+ 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;
}
- ld->aio_events = malloc(td->iodepth * sizeof(struct io_event));
- memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event));
- ld->iocbs = malloc(td->iodepth * sizeof(struct iocb *));
+ ld->aio_events = malloc(td->o.iodepth * sizeof(struct io_event));
+ memset(ld->aio_events, 0, td->o.iodepth * sizeof(struct io_event));
+ ld->iocbs = malloc(td->o.iodepth * sizeof(struct iocb *));
memset(ld->iocbs, 0, sizeof(struct iocb *));
- ld->io_us = malloc(td->iodepth * sizeof(struct io_u *));
- memset(ld->io_us, 0, td->iodepth * sizeof(struct io_u *));
+ ld->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
+ memset(ld->io_us, 0, td->o.iodepth * sizeof(struct io_u *));
ld->iocbs_nr = 0;
td->io_ops->data = ld;