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[fio.git] / ioengines.c

diff --git a/ioengines.c b/ioengines.c
index 1b510dfe1daef46cd2be9c17255fff438a8d9928..a7ccad66f810b982b7a0d15b355aa6efcbde0334 100644 (file)
--- a/ioengines.c
+++ b/ioengines.c
@@ -14,6 +14,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <dlfcn.h>
+#include <assert.h>
 
 #include "fio.h"
 #include "os.h"
@@ -66,27 +67,20 @@ void unregister_ioengine(struct ioengine_ops *ops)
        INIT_LIST_HEAD(&ops->list);
 }
 
-int register_ioengine(struct ioengine_ops *ops)
+void register_ioengine(struct ioengine_ops *ops)
 {
        INIT_LIST_HEAD(&ops->list);
        list_add_tail(&ops->list, &engine_list);
-       return 0;
 }
 
 static struct ioengine_ops *find_ioengine(const char *name)
 {
        struct ioengine_ops *ops;
        struct list_head *entry;
-       char engine[16];
-
-       strncpy(engine, name, sizeof(engine) - 1);
-
-       if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3))
-               strcpy(engine, "libaio");
 
        list_for_each(entry, &engine_list) {
                ops = list_entry(entry, struct ioengine_ops, list);
-               if (!strcmp(engine, ops->name))
+               if (!strcmp(name, ops->name))
                        return ops;
        }
 
@@ -102,7 +96,7 @@ static struct ioengine_ops *dlopen_ioengine(struct thread_data *td,
        dlerror();
        dlhandle = dlopen(engine_lib, RTLD_LAZY);
        if (!dlhandle) {
-               td_vmsg(td, -1, dlerror());
+               td_vmsg(td, -1, dlerror(), "dlopen");
                return NULL;
        }
 
@@ -112,7 +106,7 @@ static struct ioengine_ops *dlopen_ioengine(struct thread_data *td,
         */
        ops = dlsym(dlhandle, "ioengine");
        if (!ops) {
-               td_vmsg(td, -1, dlerror());
+               td_vmsg(td, -1, dlerror(), "dlsym");
                dlclose(dlhandle);
                return NULL;
        }
@@ -164,7 +158,10 @@ void close_ioengine(struct thread_data *td)
        if (td->io_ops->dlhandle)
                dlclose(td->io_ops->dlhandle);
 
+#if 0
+       /* we can't do this for threads, so just leak it, it's exiting */
        free(td->io_ops);
+#endif
        td->io_ops = NULL;
 }
 
@@ -179,6 +176,12 @@ int td_io_prep(struct thread_data *td, struct io_u *io_u)
 int td_io_getevents(struct thread_data *td, int min, int max,
                    struct timespec *t)
 {
+       if (min > 0 && td->io_ops->commit) {
+               int r = td->io_ops->commit(td);
+
+               if (r < 0)
+                       return r;
+       }
        if (td->io_ops->getevents)
                return td->io_ops->getevents(td, min, max, t);
 
@@ -187,9 +190,49 @@ int td_io_getevents(struct thread_data *td, int min, int max,
 
 int td_io_queue(struct thread_data *td, struct io_u *io_u)
 {
-       fio_gettime(&io_u->issue_time, NULL);
+       int ret;
+
+       assert((io_u->flags & IO_U_F_FLIGHT) == 0);
+       io_u->flags |= IO_U_F_FLIGHT;
+
+       if (td->io_ops->flags & FIO_SYNCIO) {
+               fio_gettime(&io_u->issue_time, NULL);
+
+               /*
+                * for a sync engine, set the timeout upfront
+                */
+               if (mtime_since(&td->timeout_end, &io_u->issue_time) < IO_U_TIMEOUT)
+                       io_u_set_timeout(td);
+       }
+
+       if (io_u->ddir != DDIR_SYNC)
+               td->io_issues[io_u->ddir]++;
+
+       ret = td->io_ops->queue(td, io_u);
 
-       return td->io_ops->queue(td, io_u);
+       if (ret == FIO_Q_QUEUED) {
+               int r;
+
+               td->io_u_queued++;
+               if (td->io_u_queued > td->iodepth_batch) {
+                       r = td_io_commit(td);
+                       if (r < 0)
+                               return r;
+               }
+       }
+
+       if ((td->io_ops->flags & FIO_SYNCIO) == 0) {
+               fio_gettime(&io_u->issue_time, NULL);
+
+               /*
+                * async engine, set the timeout here
+                */
+               if (ret == FIO_Q_QUEUED &&
+                   mtime_since(&td->timeout_end, &io_u->issue_time) < IO_U_TIMEOUT)
+                       io_u_set_timeout(td);
+       }
+
+       return ret;
 }
 
 int td_io_init(struct thread_data *td)
@@ -199,3 +242,15 @@ int td_io_init(struct thread_data *td)
 
        return 0;
 }
+
+int td_io_commit(struct thread_data *td)
+{
+       if (!td->cur_depth)
+               return 0;
+
+       td->io_u_queued = 0;
+       if (td->io_ops->commit)
+               return td->io_ops->commit(td);
+
+       return 0;
+}