Warn more gently if the kernel is too old for io scheduler switching

[fio.git] / fio.c

diff --git a/fio.c b/fio.c
index f6c3fc8fe555ca31e78b7eb1666dfa6ac27185f7..160d533583b6850c30bacbd98e1ef345db5c7680 100644 (file)
--- a/fio.c
+++ b/fio.c
@@ -35,7 +35,6 @@
 #include <sys/mman.h>
 
 #include "fio.h"
-#include "os.h"
 
 unsigned long page_mask;
 unsigned long page_size;
@@ -342,10 +341,17 @@ static void do_verify(struct thread_data *td)
                                        put_io_u(td, io_u);
                                        break;
                                }
+
                                io_u->xfer_buflen = io_u->resid;
                                io_u->xfer_buf += bytes;
+                               io_u->offset += bytes;
+
+                               if (io_u->offset == io_u->file->real_file_size)
+                                       goto sync_done;
+
                                requeue_io_u(td, &io_u);
                        } else {
+sync_done:
                                ret = io_u_sync_complete(td, io_u);
                                if (ret < 0)
                                        break;
@@ -412,7 +418,7 @@ static void do_io(struct thread_data *td)
 
        td_set_runstate(td, TD_RUNNING);
 
-       while ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->io_size) {
+       while ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) {
                struct timeval comp_time;
                long bytes_done = 0;
                int min_evts = 0;
@@ -452,8 +458,14 @@ static void do_io(struct thread_data *td)
 
                                io_u->xfer_buflen = io_u->resid;
                                io_u->xfer_buf += bytes;
+                               io_u->offset += bytes;
+
+                               if (io_u->offset == io_u->file->real_file_size)
+                                       goto sync_done;
+
                                requeue_io_u(td, &io_u);
                        } else {
+sync_done:
                                fio_gettime(&comp_time, NULL);
                                bytes_done = io_u_sync_complete(td, io_u);
                                if (bytes_done < 0)
@@ -650,7 +662,11 @@ static int switch_ioscheduler(struct thread_data *td)
 
        f = fopen(tmp, "r+");
        if (!f) {
-               td_verror(td, errno, "fopen");
+               if (errno == ENOENT) {
+                       log_err("fio: os or kernel doesn't support IO scheduler switching\n");
+                       return 0;
+               }
+               td_verror(td, errno, "fopen iosched");
                return 1;
        }
 
@@ -735,8 +751,9 @@ static void *thread_main(void *data)
        INIT_LIST_HEAD(&td->io_u_freelist);
        INIT_LIST_HEAD(&td->io_u_busylist);
        INIT_LIST_HEAD(&td->io_u_requeues);
-       INIT_LIST_HEAD(&td->io_hist_list);
        INIT_LIST_HEAD(&td->io_log_list);
+       INIT_LIST_HEAD(&td->io_hist_list);
+       td->io_hist_tree = RB_ROOT;
 
        if (init_io_u(td))
                goto err_sem;
@@ -977,6 +994,7 @@ static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
                /*
                 * thread is not dead, continue
                 */
+               pending++;
                continue;
 reaped:
                if (td->o.use_thread) {
@@ -989,6 +1007,7 @@ reaped:
                (*nr_running)--;
                (*m_rate) -= td->o.ratemin;
                (*t_rate) -= td->o.rate;
+               pending--;
 
                if (td->error)
                        exit_value++;
@@ -1196,10 +1215,8 @@ int main(int argc, char *argv[])
        if (parse_options(argc, argv))
                return 1;
 
-       if (!thread_number) {
-               log_err("Nothing to do\n");
-               return 1;
-       }
+       if (!thread_number)
+               return 0;
 
        ps = sysconf(_SC_PAGESIZE);
        if (ps < 0) {