/*
- * read/write() engine that uses syslet to be async
+ * syslet engine
+ *
+ * IO engine that does regular pread(2)/pwrite(2) to transfer data, but
+ * with syslets to make the execution async.
*
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
+#include <asm/unistd.h>
#include "../fio.h"
-#include "../os.h"
#ifdef FIO_HAVE_SYSLET
+#ifdef __NR_pread64
+#define __NR_fio_pread __NR_pread64
+#define __NR_fio_pwrite __NR_pwrite64
+#else
+#define __NR_fio_pread __NR_pread
+#define __NR_fio_pwrite __NR_pwrite
+#endif
+
+#define ATOM_TO_IOU(p) ((struct io_u *) (unsigned long) (p))
+
struct syslet_data {
struct io_u **events;
unsigned int nr_events;
* including) this atom
*/
last = atom;
- io_u = atom->private;
+ io_u = ATOM_TO_IOU(atom);
atom = io_u->req.head;
/*
do {
long ret;
- io_u = atom->private;
- ret = *atom->ret_ptr;
+ io_u = ATOM_TO_IOU(atom);
+ ret = *(long *) (unsigned long) atom->ret_ptr;
if (ret >= 0)
io_u->resid = io_u->xfer_buflen - ret;
else if (ret < 0)
io_u->error = ret;
- assert(sd->nr_events < td->iodepth);
+ assert(sd->nr_events < td->o.iodepth);
sd->events[sd->nr_events++] = io_u;
if (atom == last)
break;
- atom = atom->next;
+ atom = (struct syslet_uatom *) (unsigned long) atom->next;
} while (1);
assert(!last->next);
break;
sd->ring[sd->ahu.user_ring_idx] = NULL;
- if (++sd->ahu.user_ring_idx == td->iodepth)
+ if (++sd->ahu.user_ring_idx == td->o.iodepth)
sd->ahu.user_ring_idx = 0;
fio_syslet_complete_atom(td, atom);
{
atom->flags = flags;
atom->nr = nr;
- atom->ret_ptr = ret_ptr;
- atom->next = NULL;
- atom->arg_ptr[0] = arg0;
- atom->arg_ptr[1] = arg1;
- atom->arg_ptr[2] = arg2;
- atom->arg_ptr[3] = arg3;
- atom->arg_ptr[4] = atom->arg_ptr[5] = NULL;
- atom->private = priv;
+ atom->ret_ptr = (uint64_t) (unsigned long) ret_ptr;
+ atom->next = 0;
+ atom->arg_ptr[0] = (uint64_t) (unsigned long) arg0;
+ atom->arg_ptr[1] = (uint64_t) (unsigned long) arg1;
+ atom->arg_ptr[2] = (uint64_t) (unsigned long) arg2;
+ atom->arg_ptr[3] = (uint64_t) (unsigned long) arg3;
+ atom->arg_ptr[4] = 0;
+ atom->arg_ptr[5] = 0;
+ atom->private = (uint64_t) (unsigned long) priv;
}
/*
* prepare rw
*/
if (io_u->ddir == DDIR_READ)
- nr = __NR_pread64;
+ nr = __NR_fio_pread;
else
- nr = __NR_pwrite64;
+ nr = __NR_fio_pwrite;
init_atom(&io_u->req.atom, nr, &f->fd, &io_u->xfer_buf,
&io_u->xfer_buflen, &io_u->offset, &io_u->req.ret, 0, io_u);
atom = sd->head;
while (atom) {
- struct io_u *io_u = atom->private;
+ struct io_u *io_u = ATOM_TO_IOU(atom);
memcpy(&io_u->issue_time, &now, sizeof(now));
io_u_queued(td, io_u);
- atom = atom->next;
+ atom = (struct syslet_uatom *) (unsigned long) atom->next;
}
}
*/
done = async_exec(sd->head, &sd->ahu);
+ if (done == (void *) -1) {
+ log_err("fio: syslets don't appear to work\n");
+ return -1;
+ }
+
sd->head = sd->tail = NULL;
if (done)
{
struct syslet_data *sd = td->io_ops->data;
+ fio_ro_check(td, io_u);
+
if (sd->tail) {
- sd->tail->next = &io_u->req.atom;
+ sd->tail->next = (uint64_t) (unsigned long) &io_u->req.atom;
sd->tail = &io_u->req.atom;
} else
- sd->head = sd->tail = &io_u->req.atom;
+ sd->head = sd->tail = (struct syslet_uatom *)&io_u->req.atom;
io_u->req.head = sd->head;
return FIO_Q_QUEUED;
memset(sd->ring, 0, ring_size);
sd->ahu.user_ring_idx = 0;
- sd->ahu.completion_ring = sd->ring;
+ sd->ahu.completion_ring_ptr = (uint64_t) (unsigned long) sd->ring;
sd->ahu.ring_size_bytes = ring_size;
sd->ahu.head_stack = thread_stack_alloc();
- sd->ahu.head_eip = (unsigned long) cachemiss_thread_start;
- sd->ahu.new_thread_eip = (unsigned long) cachemiss_thread_start;
+ sd->ahu.head_ip = (uint64_t) (unsigned long) cachemiss_thread_start;
+ sd->ahu.new_thread_ip = (uint64_t) (unsigned long) cachemiss_thread_start;
+ sd->ahu.new_thread_stack = thread_stack_alloc();
return 0;
}
free(sd->ring);
}
+static int check_syslet_support(struct syslet_data *sd)
+{
+ struct syslet_uatom atom;
+ void *ret;
+
+ init_atom(&atom, __NR_getpid, NULL, NULL, NULL, NULL, NULL, 0, NULL);
+ ret = async_exec(&atom, &sd->ahu);
+ if (ret == (void *) -1)
+ return 1;
+
+ return 0;
+}
+
static void fio_syslet_cleanup(struct thread_data *td)
{
struct syslet_data *sd = td->io_ops->data;
{
struct syslet_data *sd;
-
sd = malloc(sizeof(*sd));
memset(sd, 0, sizeof(*sd));
- sd->events = malloc(sizeof(struct io_u *) * td->iodepth);
- memset(sd->events, 0, sizeof(struct io_u *) * td->iodepth);
+ sd->events = malloc(sizeof(struct io_u *) * td->o.iodepth);
+ memset(sd->events, 0, sizeof(struct io_u *) * td->o.iodepth);
/*
* This will handily fail for kernels where syslet isn't available
*/
- if (async_head_init(sd, td->iodepth)) {
+ if (async_head_init(sd, td->o.iodepth)) {
+ free(sd->events);
+ free(sd);
+ return 1;
+ }
+
+ if (check_syslet_support(sd)) {
+ log_err("fio: syslets do not appear to work\n");
free(sd->events);
free(sd);
return 1;