#ifdef ARCH_HAVE_IOURING
-#include "../os/io_uring.h"
+#include "../lib/types.h"
+#include "../os/linux/io_uring.h"
struct io_sq_ring {
unsigned *head;
unsigned *tail;
unsigned *ring_mask;
unsigned *ring_entries;
- struct io_uring_event *events;
+ struct io_uring_cqe *cqes;
};
struct ioring_mmap {
struct ioring_data {
int ring_fd;
- struct io_u **io_us;
struct io_u **io_u_index;
struct io_sq_ring sq_ring;
- struct io_uring_iocb *iocbs;
+ struct io_uring_sqe *sqes;
struct iovec *iovecs;
unsigned sq_ring_mask;
int cq_ring_off;
unsigned iodepth;
- uint64_t cachehit;
- uint64_t cachemiss;
-
struct ioring_mmap mmap[3];
};
void *pad;
unsigned int hipri;
unsigned int fixedbufs;
- unsigned int sqthread;
- unsigned int sqthread_set;
- unsigned int sqthread_poll;
- unsigned int sqwq;
+ unsigned int sqpoll_thread;
+ unsigned int sqpoll_set;
+ unsigned int sqpoll_cpu;
};
-static int fio_ioring_sqthread_cb(void *data, unsigned long long *val)
+static int fio_ioring_sqpoll_cb(void *data, unsigned long long *val)
{
struct ioring_options *o = data;
- o->sqthread = *val;
- o->sqthread_set = 1;
+ o->sqpoll_cpu = *val;
+ o->sqpoll_set = 1;
return 0;
}
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_LIBAIO,
},
- {
- .name = "sqthread",
- .lname = "Use kernel SQ thread on this CPU",
- .type = FIO_OPT_INT,
- .cb = fio_ioring_sqthread_cb,
- .help = "Offload submission to kernel thread",
- .category = FIO_OPT_C_ENGINE,
- .group = FIO_OPT_G_LIBAIO,
- },
{
.name = "sqthread_poll",
- .lname = "Kernel SQ thread should poll",
- .type = FIO_OPT_STR_SET,
- .off1 = offsetof(struct ioring_options, sqthread_poll),
- .help = "Used with sqthread, enables kernel side polling",
+ .lname = "Kernel SQ thread polling",
+ .type = FIO_OPT_INT,
+ .off1 = offsetof(struct ioring_options, sqpoll_thread),
+ .help = "Offload submission/completion to kernel thread",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_LIBAIO,
},
{
- .name = "sqwq",
- .lname = "Offload submission to kernel workqueue",
- .type = FIO_OPT_STR_SET,
- .off1 = offsetof(struct ioring_options, sqwq),
- .help = "Offload submission to kernel workqueue",
+ .name = "sqthread_poll_cpu",
+ .lname = "SQ Thread Poll CPU",
+ .type = FIO_OPT_INT,
+ .cb = fio_ioring_sqpoll_cb,
+ .help = "What CPU to run SQ thread polling on",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_LIBAIO,
},
unsigned int min_complete, unsigned int flags)
{
return syscall(__NR_sys_io_uring_enter, ld->ring_fd, to_submit,
- min_complete, flags);
+ min_complete, flags, NULL, 0);
}
static int fio_ioring_prep(struct thread_data *td, struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
+ struct ioring_options *o = td->eo;
struct fio_file *f = io_u->file;
- struct io_uring_iocb *iocb;
+ struct io_uring_sqe *sqe;
- iocb = &ld->iocbs[io_u->index];
- iocb->fd = f->fd;
- iocb->flags = 0;
- iocb->ioprio = 0;
+ sqe = &ld->sqes[io_u->index];
+ sqe->fd = f->fd;
+ sqe->flags = 0;
+ sqe->ioprio = 0;
+ sqe->buf_index = 0;
if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) {
- if (io_u->ddir == DDIR_READ)
- iocb->opcode = IORING_OP_READ;
- else
- iocb->opcode = IORING_OP_WRITE;
- iocb->off = io_u->offset;
- iocb->addr = io_u->xfer_buf;
- iocb->len = io_u->xfer_buflen;
- } else if (ddir_sync(io_u->ddir))
- iocb->opcode = IORING_OP_FSYNC;
+ if (o->fixedbufs) {
+ if (io_u->ddir == DDIR_READ)
+ sqe->opcode = IORING_OP_READ_FIXED;
+ else
+ sqe->opcode = IORING_OP_WRITE_FIXED;
+ sqe->addr = (unsigned long) io_u->xfer_buf;
+ sqe->len = io_u->xfer_buflen;
+ sqe->buf_index = io_u->index;
+ } else {
+ if (io_u->ddir == DDIR_READ)
+ sqe->opcode = IORING_OP_READV;
+ else
+ sqe->opcode = IORING_OP_WRITEV;
+ sqe->addr = (unsigned long) &ld->iovecs[io_u->index];
+ sqe->len = 1;
+ }
+ sqe->off = io_u->offset;
+ } else if (ddir_sync(io_u->ddir)) {
+ sqe->fsync_flags = 0;
+ if (io_u->ddir == DDIR_DATASYNC)
+ sqe->fsync_flags |= IORING_FSYNC_DATASYNC;
+ sqe->opcode = IORING_OP_FSYNC;
+ }
+ sqe->user_data = (unsigned long) io_u;
return 0;
}
static struct io_u *fio_ioring_event(struct thread_data *td, int event)
{
struct ioring_data *ld = td->io_ops_data;
- struct io_uring_event *ev;
+ struct io_uring_cqe *cqe;
struct io_u *io_u;
unsigned index;
index = (event + ld->cq_ring_off) & ld->cq_ring_mask;
- ev = &ld->cq_ring.events[index];
- io_u = ld->io_u_index[ev->index];
+ cqe = &ld->cq_ring.cqes[index];
+ io_u = (struct io_u *) (uintptr_t) cqe->user_data;
- if (ev->res != io_u->xfer_buflen) {
- if (ev->res > io_u->xfer_buflen)
- io_u->error = -ev->res;
+ if (cqe->res != io_u->xfer_buflen) {
+ if (cqe->res > io_u->xfer_buflen)
+ io_u->error = -cqe->res;
else
- io_u->resid = io_u->xfer_buflen - ev->res;
+ io_u->resid = io_u->xfer_buflen - cqe->res;
} else
io_u->error = 0;
- if (io_u->ddir == DDIR_READ) {
- if (ev->flags & IOEV_FLAG_CACHEHIT)
- ld->cachehit++;
- else
- ld->cachemiss++;
- }
-
return io_u;
}
r = fio_ioring_cqring_reap(td, events, max);
if (r) {
events += r;
+ if (actual_min != 0)
+ actual_min -= r;
continue;
}
- if (!o->sqthread_poll) {
+ if (!o->sqpoll_thread) {
r = io_uring_enter(ld, 0, actual_min,
IORING_ENTER_GETEVENTS);
if (r < 0) {
if (next_tail == *ring->head)
return FIO_Q_BUSY;
+ /* ensure sqe stores are ordered with tail update */
+ write_barrier();
ring->array[tail & ld->sq_ring_mask] = io_u->index;
*ring->tail = next_tail;
write_barrier();
if (!ld->queued)
return 0;
- /* Nothing to do */
- if (o->sqthread_poll) {
+ /*
+ * Kernel side does submission. just need to check if the ring is
+ * flagged as needing a kick, if so, call io_uring_enter(). This
+ * only happens if we've been idle too long.
+ */
+ if (o->sqpoll_thread) {
struct io_sq_ring *ring = &ld->sq_ring;
+ read_barrier();
if (*ring->flags & IORING_SQ_NEED_WAKEUP)
- io_uring_enter(ld, ld->queued, 0, 0);
+ io_uring_enter(ld, ld->queued, 0,
+ IORING_ENTER_SQ_WAKEUP);
ld->queued = 0;
return 0;
}
struct ioring_data *ld = td->io_ops_data;
if (ld) {
- td->ts.cachehit += ld->cachehit;
- td->ts.cachemiss += ld->cachemiss;
-
if (!(td->flags & TD_F_CHILD))
fio_ioring_unmap(ld);
free(ld->io_u_index);
- free(ld->io_us);
free(ld->iovecs);
free(ld);
}
sring->array = ptr + p->sq_off.array;
ld->sq_ring_mask = *sring->ring_mask;
- ld->mmap[1].len = p->sq_entries * sizeof(struct io_uring_iocb);
- ld->iocbs = mmap(0, ld->mmap[1].len, PROT_READ | PROT_WRITE,
+ ld->mmap[1].len = p->sq_entries * sizeof(struct io_uring_sqe);
+ ld->sqes = mmap(0, ld->mmap[1].len, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, ld->ring_fd,
- IORING_OFF_IOCB);
- ld->mmap[1].ptr = ld->iocbs;
+ IORING_OFF_SQES);
+ ld->mmap[1].ptr = ld->sqes;
- ld->mmap[2].len = p->cq_off.events +
- p->cq_entries * sizeof(struct io_uring_event);
+ ld->mmap[2].len = p->cq_off.cqes +
+ p->cq_entries * sizeof(struct io_uring_cqe);
ptr = mmap(0, ld->mmap[2].len, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, ld->ring_fd,
IORING_OFF_CQ_RING);
cring->tail = ptr + p->cq_off.tail;
cring->ring_mask = ptr + p->cq_off.ring_mask;
cring->ring_entries = ptr + p->cq_off.ring_entries;
- cring->events = ptr + p->cq_off.events;
+ cring->cqes = ptr + p->cq_off.cqes;
ld->cq_ring_mask = *cring->ring_mask;
return 0;
}
if (o->hipri)
p.flags |= IORING_SETUP_IOPOLL;
- if (o->sqthread_set) {
- p.sq_thread_cpu = o->sqthread;
- p.flags |= IORING_SETUP_SQTHREAD;
- if (o->sqthread_poll)
- p.flags |= IORING_SETUP_SQPOLL;
+ if (o->sqpoll_thread) {
+ p.flags |= IORING_SETUP_SQPOLL;
+ if (o->sqpoll_set) {
+ p.flags |= IORING_SETUP_SQ_AFF;
+ p.sq_thread_cpu = o->sqpoll_cpu;
+ }
}
- if (o->sqwq)
- p.flags |= IORING_SETUP_SQWQ;
+
+ ret = syscall(__NR_sys_io_uring_setup, depth, &p);
+ if (ret < 0)
+ return ret;
+
+ ld->ring_fd = ret;
if (o->fixedbufs) {
struct rlimit rlim = {
.rlim_max = RLIM_INFINITY,
};
- setrlimit(RLIMIT_MEMLOCK, &rlim);
- p.flags |= IORING_SETUP_FIXEDBUFS;
- }
+ if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0)
+ return -1;
- ret = syscall(__NR_sys_io_uring_setup, depth, ld->iovecs, &p);
- if (ret < 0)
- return ret;
+ ret = syscall(__NR_sys_io_uring_register, ld->ring_fd,
+ IORING_REGISTER_BUFFERS, ld->iovecs, depth);
+ if (ret < 0)
+ return ret;
+ }
- ld->ring_fd = ret;
return fio_ioring_mmap(ld, &p);
}
static int fio_ioring_post_init(struct thread_data *td)
{
struct ioring_data *ld = td->io_ops_data;
- struct ioring_options *o = td->eo;
struct io_u *io_u;
- int err;
+ int err, i;
- if (o->fixedbufs) {
- int i;
-
- for (i = 0; i < td->o.iodepth; i++) {
- struct iovec *iov = &ld->iovecs[i];
+ for (i = 0; i < td->o.iodepth; i++) {
+ struct iovec *iov = &ld->iovecs[i];
- io_u = ld->io_u_index[i];
- iov->iov_base = io_u->buf;
- iov->iov_len = td_max_bs(td);
- }
+ io_u = ld->io_u_index[i];
+ iov->iov_base = io_u->buf;
+ iov->iov_len = td_max_bs(td);
}
err = fio_ioring_queue_init(td);
/* io_u index */
ld->io_u_index = calloc(td->o.iodepth, sizeof(struct io_u *));
- ld->io_us = calloc(td->o.iodepth, sizeof(struct io_u *));
-
ld->iovecs = calloc(td->o.iodepth, sizeof(struct iovec));
td->io_ops_data = ld;
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