+++ /dev/null
-/*
- * aioring engine
- *
- * IO engine using the new native Linux libaio ring interface. See:
- *
- * http://git.kernel.dk/cgit/linux-block/log/?h=aio-poll
- *
- */
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.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 "../lib/fls.h"
-
-#ifdef ARCH_HAVE_AIORING
-
-/*
- * io_uring_setup(2) flags
- */
-#ifndef IOCTX_FLAG_SCQRING
-#define IOCTX_FLAG_SCQRING (1 << 0)
-#endif
-#ifndef IOCTX_FLAG_IOPOLL
-#define IOCTX_FLAG_IOPOLL (1 << 1)
-#endif
-#ifndef IOCTX_FLAG_FIXEDBUFS
-#define IOCTX_FLAG_FIXEDBUFS (1 << 2)
-#endif
-#ifndef IOCTX_FLAG_SQTHREAD
-#define IOCTX_FLAG_SQTHREAD (1 << 3)
-#endif
-#ifndef IOCTX_FLAG_SQWQ
-#define IOCTX_FLAG_SQWQ (1 << 4)
-#endif
-#ifndef IOCTX_FLAG_SQPOLL
-#define IOCTX_FLAG_SQPOLL (1 << 5)
-#endif
-
-#define IORING_OFF_SQ_RING 0ULL
-#define IORING_OFF_CQ_RING 0x8000000ULL
-#define IORING_OFF_IOCB 0x10000000ULL
-
-/*
- * io_uring_enter(2) flags
- */
-#ifndef IORING_ENTER_GETEVENTS
-#define IORING_ENTER_GETEVENTS (1 << 0)
-#endif
-
-typedef uint64_t u64;
-typedef uint32_t u32;
-typedef uint16_t u16;
-
-#define IORING_SQ_NEED_WAKEUP (1 << 0)
-
-#define IOEV_RES2_CACHEHIT (1 << 0)
-
-struct aio_sqring_offsets {
- u32 head;
- u32 tail;
- u32 ring_mask;
- u32 ring_entries;
- u32 flags;
- u32 dropped;
- u32 array;
- u32 resv[3];
-};
-
-struct aio_cqring_offsets {
- u32 head;
- u32 tail;
- u32 ring_mask;
- u32 ring_entries;
- u32 overflow;
- u32 events;
- u32 resv[4];
-};
-
-struct aio_uring_params {
- u32 sq_entries;
- u32 cq_entries;
- u32 flags;
- u16 sq_thread_cpu;
- u16 resv[9];
- struct aio_sqring_offsets sq_off;
- struct aio_cqring_offsets cq_off;
-};
-
-struct aio_sq_ring {
- u32 *head;
- u32 *tail;
- u32 *ring_mask;
- u32 *ring_entries;
- u32 *flags;
- u32 *array;
-};
-
-struct aio_cq_ring {
- u32 *head;
- u32 *tail;
- u32 *ring_mask;
- u32 *ring_entries;
- struct io_event *events;
-};
-
-struct aioring_mmap {
- void *ptr;
- size_t len;
-};
-
-struct aioring_data {
- int ring_fd;
-
- struct io_u **io_us;
- struct io_u **io_u_index;
-
- struct aio_sq_ring sq_ring;
- struct iocb *iocbs;
- struct iovec *iovecs;
- unsigned sq_ring_mask;
-
- struct aio_cq_ring cq_ring;
- struct io_event *events;
- unsigned cq_ring_mask;
-
- int queued;
- int cq_ring_off;
- unsigned iodepth;
-
- uint64_t cachehit;
- uint64_t cachemiss;
-
- struct aioring_mmap mmap[3];
-};
-
-struct aioring_options {
- void *pad;
- unsigned int hipri;
- unsigned int fixedbufs;
- unsigned int sqthread;
- unsigned int sqthread_set;
- unsigned int sqthread_poll;
- unsigned int sqwq;
-};
-
-static int fio_aioring_sqthread_cb(void *data,
- unsigned long long *val)
-{
- struct aioring_options *o = data;
-
- o->sqthread = *val;
- o->sqthread_set = 1;
- return 0;
-}
-
-static struct fio_option options[] = {
- {
- .name = "hipri",
- .lname = "High Priority",
- .type = FIO_OPT_STR_SET,
- .off1 = offsetof(struct aioring_options, hipri),
- .help = "Use polled IO completions",
- .category = FIO_OPT_C_ENGINE,
- .group = FIO_OPT_G_LIBAIO,
- },
- {
- .name = "fixedbufs",
- .lname = "Fixed (pre-mapped) IO buffers",
- .type = FIO_OPT_STR_SET,
- .off1 = offsetof(struct aioring_options, fixedbufs),
- .help = "Pre map IO buffers",
- .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_aioring_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 aioring_options, sqthread_poll),
- .help = "Used with sqthread, enables kernel side polling",
- .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 aioring_options, sqwq),
- .help = "Offload submission to kernel workqueue",
- .category = FIO_OPT_C_ENGINE,
- .group = FIO_OPT_G_LIBAIO,
- },
- {
- .name = NULL,
- },
-};
-
-static int io_uring_enter(struct aioring_data *ld, unsigned int to_submit,
- unsigned int min_complete, unsigned int flags)
-{
- return syscall(__NR_sys_io_uring_enter, ld->ring_fd, to_submit,
- min_complete, flags);
-}
-
-static int fio_aioring_prep(struct thread_data *td, struct io_u *io_u)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct fio_file *f = io_u->file;
- struct iocb *iocb;
-
- iocb = &ld->iocbs[io_u->index];
-
- if (io_u->ddir == DDIR_READ || io_u->ddir == DDIR_WRITE) {
- if (io_u->ddir == DDIR_READ)
- iocb->aio_lio_opcode = IO_CMD_PREAD;
- else
- iocb->aio_lio_opcode = IO_CMD_PWRITE;
- iocb->aio_reqprio = 0;
- iocb->aio_fildes = f->fd;
- iocb->u.c.buf = io_u->xfer_buf;
- iocb->u.c.nbytes = io_u->xfer_buflen;
- iocb->u.c.offset = io_u->offset;
- iocb->u.c.flags = 0;
- } else if (ddir_sync(io_u->ddir))
- io_prep_fsync(iocb, f->fd);
-
- iocb->data = io_u;
- return 0;
-}
-
-static struct io_u *fio_aioring_event(struct thread_data *td, int event)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct io_event *ev;
- 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 = ev->data;
-
- if (ev->res != io_u->xfer_buflen) {
- if (ev->res > io_u->xfer_buflen)
- io_u->error = -ev->res;
- else
- io_u->resid = io_u->xfer_buflen - ev->res;
- } else
- io_u->error = 0;
-
- if (io_u->ddir == DDIR_READ) {
- if (ev->res2 & IOEV_RES2_CACHEHIT)
- ld->cachehit++;
- else
- ld->cachemiss++;
- }
-
- return io_u;
-}
-
-static int fio_aioring_cqring_reap(struct thread_data *td, unsigned int events,
- unsigned int max)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct aio_cq_ring *ring = &ld->cq_ring;
- u32 head, reaped = 0;
-
- head = *ring->head;
- do {
- read_barrier();
- if (head == *ring->tail)
- break;
- reaped++;
- head++;
- } while (reaped + events < max);
-
- *ring->head = head;
- write_barrier();
- return reaped;
-}
-
-static int fio_aioring_getevents(struct thread_data *td, unsigned int min,
- unsigned int max, const struct timespec *t)
-{
- struct aioring_data *ld = td->io_ops_data;
- unsigned actual_min = td->o.iodepth_batch_complete_min == 0 ? 0 : min;
- struct aioring_options *o = td->eo;
- struct aio_cq_ring *ring = &ld->cq_ring;
- unsigned events = 0;
- int r;
-
- ld->cq_ring_off = *ring->head;
- do {
- r = fio_aioring_cqring_reap(td, events, max);
- if (r) {
- events += r;
- continue;
- }
-
- if (!o->sqthread_poll) {
- r = io_uring_enter(ld, 0, actual_min,
- IORING_ENTER_GETEVENTS);
- if (r < 0) {
- if (errno == EAGAIN)
- continue;
- td_verror(td, errno, "io_uring_enter");
- break;
- }
- }
- } while (events < min);
-
- return r < 0 ? r : events;
-}
-
-static enum fio_q_status fio_aioring_queue(struct thread_data *td,
- struct io_u *io_u)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct aio_sq_ring *ring = &ld->sq_ring;
- unsigned tail, next_tail;
-
- fio_ro_check(td, io_u);
-
- if (ld->queued == ld->iodepth)
- return FIO_Q_BUSY;
-
- if (io_u->ddir == DDIR_TRIM) {
- if (ld->queued)
- 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;
- }
-
- tail = *ring->tail;
- next_tail = tail + 1;
- read_barrier();
- if (next_tail == *ring->head)
- return FIO_Q_BUSY;
-
- ring->array[tail & ld->sq_ring_mask] = io_u->index;
- *ring->tail = next_tail;
- write_barrier();
-
- ld->queued++;
- return FIO_Q_QUEUED;
-}
-
-static void fio_aioring_queued(struct thread_data *td, int start, int nr)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct timespec now;
-
- if (!fio_fill_issue_time(td))
- return;
-
- fio_gettime(&now, NULL);
-
- while (nr--) {
- struct aio_sq_ring *ring = &ld->sq_ring;
- int index = ring->array[start & ld->sq_ring_mask];
- struct io_u *io_u = ld->io_u_index[index];
-
- memcpy(&io_u->issue_time, &now, sizeof(now));
- io_u_queued(td, io_u);
-
- start++;
- }
-}
-
-static int fio_aioring_commit(struct thread_data *td)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct aioring_options *o = td->eo;
- int ret;
-
- if (!ld->queued)
- return 0;
-
- /* Nothing to do */
- if (o->sqthread_poll) {
- struct aio_sq_ring *ring = &ld->sq_ring;
-
- if (*ring->flags & IORING_SQ_NEED_WAKEUP)
- io_uring_enter(ld, ld->queued, 0, 0);
- ld->queued = 0;
- return 0;
- }
-
- do {
- unsigned start = *ld->sq_ring.head;
- long nr = ld->queued;
-
- ret = io_uring_enter(ld, nr, 0, IORING_ENTER_GETEVENTS);
- if (ret > 0) {
- fio_aioring_queued(td, start, ret);
- io_u_mark_submit(td, ret);
-
- ld->queued -= ret;
- ret = 0;
- } else if (!ret) {
- io_u_mark_submit(td, ret);
- continue;
- } else {
- if (errno == EAGAIN) {
- ret = fio_aioring_cqring_reap(td, 0, ld->queued);
- if (ret)
- continue;
- /* Shouldn't happen */
- usleep(1);
- continue;
- }
- td_verror(td, errno, "io_uring_enter submit");
- break;
- }
- } while (ld->queued);
-
- return ret;
-}
-
-static void fio_aioring_unmap(struct aioring_data *ld)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(ld->mmap); i++)
- munmap(ld->mmap[i].ptr, ld->mmap[i].len);
- close(ld->ring_fd);
-}
-
-static void fio_aioring_cleanup(struct thread_data *td)
-{
- struct aioring_data *ld = td->io_ops_data;
-
- if (ld) {
- td->ts.cachehit += ld->cachehit;
- td->ts.cachemiss += ld->cachemiss;
-
- /*
- * Work-around to avoid huge RCU stalls at exit time. If we
- * don't do this here, then it'll be torn down by exit_aio().
- * But for that case we can parallellize the freeing, thus
- * speeding it up a lot.
- */
- if (!(td->flags & TD_F_CHILD))
- fio_aioring_unmap(ld);
-
- free(ld->io_u_index);
- free(ld->io_us);
- free(ld->iovecs);
- free(ld);
- }
-}
-
-static int fio_aioring_mmap(struct aioring_data *ld, struct aio_uring_params *p)
-{
- struct aio_sq_ring *sring = &ld->sq_ring;
- struct aio_cq_ring *cring = &ld->cq_ring;
- void *ptr;
-
- ld->mmap[0].len = p->sq_off.array + p->sq_entries * sizeof(u32);
- ptr = mmap(0, ld->mmap[0].len, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_POPULATE, ld->ring_fd,
- IORING_OFF_SQ_RING);
- ld->mmap[0].ptr = ptr;
- sring->head = ptr + p->sq_off.head;
- sring->tail = ptr + p->sq_off.tail;
- sring->ring_mask = ptr + p->sq_off.ring_mask;
- sring->ring_entries = ptr + p->sq_off.ring_entries;
- sring->flags = ptr + p->sq_off.flags;
- sring->array = ptr + p->sq_off.array;
- ld->sq_ring_mask = *sring->ring_mask;
-
- ld->mmap[1].len = p->sq_entries * sizeof(struct iocb);
- ld->iocbs = 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;
-
- ld->mmap[2].len = p->cq_off.events +
- p->cq_entries * sizeof(struct io_event);
- ptr = mmap(0, ld->mmap[2].len, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_POPULATE, ld->ring_fd,
- IORING_OFF_CQ_RING);
- ld->mmap[2].ptr = ptr;
- cring->head = ptr + p->cq_off.head;
- 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;
- ld->cq_ring_mask = *cring->ring_mask;
- return 0;
-}
-
-static int fio_aioring_queue_init(struct thread_data *td)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct aioring_options *o = td->eo;
- int depth = td->o.iodepth;
- struct aio_uring_params p;
- int ret;
-
- memset(&p, 0, sizeof(p));
- p.flags = IOCTX_FLAG_SCQRING;
-
- if (o->hipri)
- p.flags |= IOCTX_FLAG_IOPOLL;
- if (o->sqthread_set) {
- p.sq_thread_cpu = o->sqthread;
- p.flags |= IOCTX_FLAG_SQTHREAD;
- if (o->sqthread_poll)
- p.flags |= IOCTX_FLAG_SQPOLL;
- }
- if (o->sqwq)
- p.flags |= IOCTX_FLAG_SQWQ;
-
- if (o->fixedbufs) {
- struct rlimit rlim = {
- .rlim_cur = RLIM_INFINITY,
- .rlim_max = RLIM_INFINITY,
- };
-
- setrlimit(RLIMIT_MEMLOCK, &rlim);
- p.flags |= IOCTX_FLAG_FIXEDBUFS;
- }
-
- ret = syscall(__NR_sys_io_uring_setup, depth, ld->iovecs, &p);
- if (ret < 0)
- return ret;
-
- ld->ring_fd = ret;
- return fio_aioring_mmap(ld, &p);
-}
-
-static int fio_aioring_post_init(struct thread_data *td)
-{
- struct aioring_data *ld = td->io_ops_data;
- struct aioring_options *o = td->eo;
- struct io_u *io_u;
- int err;
-
- if (o->fixedbufs) {
- int 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);
- }
- }
-
- err = fio_aioring_queue_init(td);
- if (err) {
- td_verror(td, errno, "io_queue_init");
- return 1;
- }
-
- return 0;
-}
-
-static unsigned roundup_pow2(unsigned depth)
-{
- return 1UL << __fls(depth - 1);
-}
-
-static int fio_aioring_init(struct thread_data *td)
-{
- struct aioring_data *ld;
-
- ld = calloc(1, sizeof(*ld));
-
- /* ring depth must be a power-of-2 */
- ld->iodepth = td->o.iodepth;
- td->o.iodepth = roundup_pow2(td->o.iodepth);
-
- /* 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;
- return 0;
-}
-
-static int fio_aioring_io_u_init(struct thread_data *td, struct io_u *io_u)
-{
- struct aioring_data *ld = td->io_ops_data;
-
- ld->io_u_index[io_u->index] = io_u;
- return 0;
-}
-
-static struct ioengine_ops ioengine = {
- .name = "aio-ring",
- .version = FIO_IOOPS_VERSION,
- .init = fio_aioring_init,
- .post_init = fio_aioring_post_init,
- .io_u_init = fio_aioring_io_u_init,
- .prep = fio_aioring_prep,
- .queue = fio_aioring_queue,
- .commit = fio_aioring_commit,
- .getevents = fio_aioring_getevents,
- .event = fio_aioring_event,
- .cleanup = fio_aioring_cleanup,
- .open_file = generic_open_file,
- .close_file = generic_close_file,
- .get_file_size = generic_get_file_size,
- .options = options,
- .option_struct_size = sizeof(struct aioring_options),
-};
-
-static void fio_init fio_aioring_register(void)
-{
- register_ioengine(&ioengine);
-}
-
-static void fio_exit fio_aioring_unregister(void)
-{
- unregister_ioengine(&ioengine);
-}
-#endif
--- /dev/null
+/*
+ * io_uring engine
+ *
+ * IO engine using the new native Linux aio io_uring interface. See:
+ *
+ * http://git.kernel.dk/cgit/linux-block/log/?h=io_uring
+ *
+ */
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#include "../fio.h"
+#include "../lib/pow2.h"
+#include "../optgroup.h"
+#include "../lib/memalign.h"
+#include "../lib/fls.h"
+
+#ifdef ARCH_HAVE_IOURING
+
+typedef uint64_t u64;
+typedef uint32_t u32;
+typedef int32_t s32;
+typedef uint16_t u16;
+typedef uint8_t u8;
+
+#include "../os/io_uring.h"
+
+struct io_sq_ring {
+ u32 *head;
+ u32 *tail;
+ u32 *ring_mask;
+ u32 *ring_entries;
+ u32 *flags;
+ u32 *array;
+};
+
+struct io_cq_ring {
+ u32 *head;
+ u32 *tail;
+ u32 *ring_mask;
+ u32 *ring_entries;
+ struct io_uring_event *events;
+};
+
+struct ioring_mmap {
+ void *ptr;
+ size_t len;
+};
+
+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 iovec *iovecs;
+ unsigned sq_ring_mask;
+
+ struct io_cq_ring cq_ring;
+ unsigned cq_ring_mask;
+
+ int queued;
+ int cq_ring_off;
+ unsigned iodepth;
+
+ uint64_t cachehit;
+ uint64_t cachemiss;
+
+ struct ioring_mmap mmap[3];
+};
+
+struct ioring_options {
+ void *pad;
+ unsigned int hipri;
+ unsigned int fixedbufs;
+ unsigned int sqthread;
+ unsigned int sqthread_set;
+ unsigned int sqthread_poll;
+ unsigned int sqwq;
+};
+
+static int fio_ioring_sqthread_cb(void *data, unsigned long long *val)
+{
+ struct ioring_options *o = data;
+
+ o->sqthread = *val;
+ o->sqthread_set = 1;
+ return 0;
+}
+
+static struct fio_option options[] = {
+ {
+ .name = "hipri",
+ .lname = "High Priority",
+ .type = FIO_OPT_STR_SET,
+ .off1 = offsetof(struct ioring_options, hipri),
+ .help = "Use polled IO completions",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+ {
+ .name = "fixedbufs",
+ .lname = "Fixed (pre-mapped) IO buffers",
+ .type = FIO_OPT_STR_SET,
+ .off1 = offsetof(struct ioring_options, fixedbufs),
+ .help = "Pre map IO buffers",
+ .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",
+ .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",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_LIBAIO,
+ },
+ {
+ .name = NULL,
+ },
+};
+
+static int io_uring_enter(struct ioring_data *ld, unsigned int to_submit,
+ unsigned int min_complete, unsigned int flags)
+{
+ return syscall(__NR_sys_io_uring_enter, ld->ring_fd, to_submit,
+ min_complete, flags);
+}
+
+static int fio_ioring_prep(struct thread_data *td, struct io_u *io_u)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ struct fio_file *f = io_u->file;
+ struct io_uring_iocb *iocb;
+
+ iocb = &ld->iocbs[io_u->index];
+ iocb->fd = f->fd;
+ iocb->flags = 0;
+ iocb->ioprio = 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;
+
+ 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_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];
+
+ if (ev->res != io_u->xfer_buflen) {
+ if (ev->res > io_u->xfer_buflen)
+ io_u->error = -ev->res;
+ else
+ io_u->resid = io_u->xfer_buflen - ev->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;
+}
+
+static int fio_ioring_cqring_reap(struct thread_data *td, unsigned int events,
+ unsigned int max)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ struct io_cq_ring *ring = &ld->cq_ring;
+ u32 head, reaped = 0;
+
+ head = *ring->head;
+ do {
+ read_barrier();
+ if (head == *ring->tail)
+ break;
+ reaped++;
+ head++;
+ } while (reaped + events < max);
+
+ *ring->head = head;
+ write_barrier();
+ return reaped;
+}
+
+static int fio_ioring_getevents(struct thread_data *td, unsigned int min,
+ unsigned int max, const struct timespec *t)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ unsigned actual_min = td->o.iodepth_batch_complete_min == 0 ? 0 : min;
+ struct ioring_options *o = td->eo;
+ struct io_cq_ring *ring = &ld->cq_ring;
+ unsigned events = 0;
+ int r;
+
+ ld->cq_ring_off = *ring->head;
+ do {
+ r = fio_ioring_cqring_reap(td, events, max);
+ if (r) {
+ events += r;
+ continue;
+ }
+
+ if (!o->sqthread_poll) {
+ r = io_uring_enter(ld, 0, actual_min,
+ IORING_ENTER_GETEVENTS);
+ if (r < 0) {
+ if (errno == EAGAIN)
+ continue;
+ td_verror(td, errno, "io_uring_enter");
+ break;
+ }
+ }
+ } while (events < min);
+
+ return r < 0 ? r : events;
+}
+
+static enum fio_q_status fio_ioring_queue(struct thread_data *td,
+ struct io_u *io_u)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ struct io_sq_ring *ring = &ld->sq_ring;
+ unsigned tail, next_tail;
+
+ fio_ro_check(td, io_u);
+
+ if (ld->queued == ld->iodepth)
+ return FIO_Q_BUSY;
+
+ if (io_u->ddir == DDIR_TRIM) {
+ if (ld->queued)
+ 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;
+ }
+
+ tail = *ring->tail;
+ next_tail = tail + 1;
+ read_barrier();
+ if (next_tail == *ring->head)
+ return FIO_Q_BUSY;
+
+ ring->array[tail & ld->sq_ring_mask] = io_u->index;
+ *ring->tail = next_tail;
+ write_barrier();
+
+ ld->queued++;
+ return FIO_Q_QUEUED;
+}
+
+static void fio_ioring_queued(struct thread_data *td, int start, int nr)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ struct timespec now;
+
+ if (!fio_fill_issue_time(td))
+ return;
+
+ fio_gettime(&now, NULL);
+
+ while (nr--) {
+ struct io_sq_ring *ring = &ld->sq_ring;
+ int index = ring->array[start & ld->sq_ring_mask];
+ struct io_u *io_u = ld->io_u_index[index];
+
+ memcpy(&io_u->issue_time, &now, sizeof(now));
+ io_u_queued(td, io_u);
+
+ start++;
+ }
+}
+
+static int fio_ioring_commit(struct thread_data *td)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ struct ioring_options *o = td->eo;
+ int ret;
+
+ if (!ld->queued)
+ return 0;
+
+ /* Nothing to do */
+ if (o->sqthread_poll) {
+ struct io_sq_ring *ring = &ld->sq_ring;
+
+ if (*ring->flags & IORING_SQ_NEED_WAKEUP)
+ io_uring_enter(ld, ld->queued, 0, 0);
+ ld->queued = 0;
+ return 0;
+ }
+
+ do {
+ unsigned start = *ld->sq_ring.head;
+ long nr = ld->queued;
+
+ ret = io_uring_enter(ld, nr, 0, IORING_ENTER_GETEVENTS);
+ if (ret > 0) {
+ fio_ioring_queued(td, start, ret);
+ io_u_mark_submit(td, ret);
+
+ ld->queued -= ret;
+ ret = 0;
+ } else if (!ret) {
+ io_u_mark_submit(td, ret);
+ continue;
+ } else {
+ if (errno == EAGAIN) {
+ ret = fio_ioring_cqring_reap(td, 0, ld->queued);
+ if (ret)
+ continue;
+ /* Shouldn't happen */
+ usleep(1);
+ continue;
+ }
+ td_verror(td, errno, "io_uring_enter submit");
+ break;
+ }
+ } while (ld->queued);
+
+ return ret;
+}
+
+static void fio_ioring_unmap(struct ioring_data *ld)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ld->mmap); i++)
+ munmap(ld->mmap[i].ptr, ld->mmap[i].len);
+ close(ld->ring_fd);
+}
+
+static void fio_ioring_cleanup(struct thread_data *td)
+{
+ 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);
+ }
+}
+
+static int fio_ioring_mmap(struct ioring_data *ld, struct io_uring_params *p)
+{
+ struct io_sq_ring *sring = &ld->sq_ring;
+ struct io_cq_ring *cring = &ld->cq_ring;
+ void *ptr;
+
+ ld->mmap[0].len = p->sq_off.array + p->sq_entries * sizeof(u32);
+ ptr = mmap(0, ld->mmap[0].len, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_POPULATE, ld->ring_fd,
+ IORING_OFF_SQ_RING);
+ ld->mmap[0].ptr = ptr;
+ sring->head = ptr + p->sq_off.head;
+ sring->tail = ptr + p->sq_off.tail;
+ sring->ring_mask = ptr + p->sq_off.ring_mask;
+ sring->ring_entries = ptr + p->sq_off.ring_entries;
+ sring->flags = ptr + p->sq_off.flags;
+ 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,
+ MAP_SHARED | MAP_POPULATE, ld->ring_fd,
+ IORING_OFF_IOCB);
+ ld->mmap[1].ptr = ld->iocbs;
+
+ ld->mmap[2].len = p->cq_off.events +
+ p->cq_entries * sizeof(struct io_uring_event);
+ ptr = mmap(0, ld->mmap[2].len, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_POPULATE, ld->ring_fd,
+ IORING_OFF_CQ_RING);
+ ld->mmap[2].ptr = ptr;
+ cring->head = ptr + p->cq_off.head;
+ 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;
+ ld->cq_ring_mask = *cring->ring_mask;
+ return 0;
+}
+
+static int fio_ioring_queue_init(struct thread_data *td)
+{
+ struct ioring_data *ld = td->io_ops_data;
+ struct ioring_options *o = td->eo;
+ int depth = td->o.iodepth;
+ struct io_uring_params p;
+ int ret;
+
+ memset(&p, 0, sizeof(p));
+
+ 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->sqwq)
+ p.flags |= IORING_SETUP_SQWQ;
+
+ if (o->fixedbufs) {
+ struct rlimit rlim = {
+ .rlim_cur = RLIM_INFINITY,
+ .rlim_max = RLIM_INFINITY,
+ };
+
+ setrlimit(RLIMIT_MEMLOCK, &rlim);
+ p.flags |= IORING_SETUP_FIXEDBUFS;
+ }
+
+ ret = syscall(__NR_sys_io_uring_setup, depth, ld->iovecs, &p);
+ 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;
+
+ if (o->fixedbufs) {
+ int 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);
+ }
+ }
+
+ err = fio_ioring_queue_init(td);
+ if (err) {
+ td_verror(td, errno, "io_queue_init");
+ return 1;
+ }
+
+ return 0;
+}
+
+static unsigned roundup_pow2(unsigned depth)
+{
+ return 1UL << __fls(depth - 1);
+}
+
+static int fio_ioring_init(struct thread_data *td)
+{
+ struct ioring_data *ld;
+
+ ld = calloc(1, sizeof(*ld));
+
+ /* ring depth must be a power-of-2 */
+ ld->iodepth = td->o.iodepth;
+ td->o.iodepth = roundup_pow2(td->o.iodepth);
+
+ /* 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;
+ return 0;
+}
+
+static int fio_ioring_io_u_init(struct thread_data *td, struct io_u *io_u)
+{
+ struct ioring_data *ld = td->io_ops_data;
+
+ ld->io_u_index[io_u->index] = io_u;
+ return 0;
+}
+
+static struct ioengine_ops ioengine = {
+ .name = "io_uring",
+ .version = FIO_IOOPS_VERSION,
+ .init = fio_ioring_init,
+ .post_init = fio_ioring_post_init,
+ .io_u_init = fio_ioring_io_u_init,
+ .prep = fio_ioring_prep,
+ .queue = fio_ioring_queue,
+ .commit = fio_ioring_commit,
+ .getevents = fio_ioring_getevents,
+ .event = fio_ioring_event,
+ .cleanup = fio_ioring_cleanup,
+ .open_file = generic_open_file,
+ .close_file = generic_close_file,
+ .get_file_size = generic_get_file_size,
+ .options = options,
+ .option_struct_size = sizeof(struct ioring_options),
+};
+
+static void fio_init fio_ioring_register(void)
+{
+ register_ioengine(&ioengine);
+}
+
+static void fio_exit fio_ioring_unregister(void)
+{
+ unregister_ioengine(&ioengine);
+}
+#endif
projects / fio.git / commitdiff