Add strong madvise() hint for cache pruning

[fio.git] / engines / syslet-rw.c

diff --git a/engines/syslet-rw.c b/engines/syslet-rw.c
index e4ccb957194d29b9cd70b8624d51a8f591563a5e..c11e4f21fc39990fc6ece7bfd2dc03bee4c682a2 100644 (file)
--- a/engines/syslet-rw.c
+++ b/engines/syslet-rw.c
@@ -14,8 +14,7 @@
 #include <asm/unistd.h>
 
 #include "../fio.h"
-#include "../indirect.h"
-#include "../syslet.h"
+#include "../lib/fls.h"
 
 #ifdef FIO_HAVE_SYSLET
 
@@ -99,8 +98,8 @@ static void fio_syslet_wait_for_events(struct thread_data *td)
        } while (1);
 }
 
-static int fio_syslet_getevents(struct thread_data *td, int min,
-                               int fio_unused max,
+static int fio_syslet_getevents(struct thread_data *td, unsigned int min,
+                               unsigned int fio_unused max,
                                struct timespec fio_unused *t)
 {
        struct syslet_data *sd = td->io_ops->data;
@@ -108,8 +107,10 @@ static int fio_syslet_getevents(struct thread_data *td, int min,
 
        /*
         * While we have less events than requested, block waiting for them
+        * (if we have to, there may already be more completed events ready
+        * for us - see fio_syslet_wait_for_events()
         */
-       while (sd->nr_events < (unsigned int) min)
+       while (sd->nr_events < min)
                fio_syslet_wait_for_events(td);
 
        ret = sd->nr_events;
@@ -130,6 +131,12 @@ static void fio_syslet_prep_sync(struct fio_file *f,
        FILL_IN(*regs, __NR_fsync, (long) f->fd);
 }
 
+static void fio_syslet_prep_datasync(struct fio_file *f,
+                                    struct indirect_registers *regs)
+{
+       FILL_IN(*regs, __NR_fdatasync, (long) f->fd);
+}
+
 static void fio_syslet_prep_rw(struct io_u *io_u, struct fio_file *f,
                               struct indirect_registers *regs)
 {
@@ -153,6 +160,8 @@ static void fio_syslet_prep(struct io_u *io_u, struct indirect_registers *regs)
 
        if (io_u->ddir == DDIR_SYNC)
                fio_syslet_prep_sync(f, regs);
+       else if (io_u->ddir == DDIR_DATASYNC)
+               fio_syslet_prep_datasync(f, regs);
        else
                fio_syslet_prep_rw(io_u, f, regs);
 }
@@ -220,9 +229,7 @@ static void fio_syslet_cleanup(struct thread_data *td)
        if (sd) {
                free(sd->events);
                free(sd->ring);
-               free(sd->stack);
                free(sd);
-               td->io_ops->data = NULL;
        }
 }
 
@@ -242,14 +249,8 @@ static int fio_syslet_init(struct thread_data *td)
         * The ring needs to be a power-of-2, so round it up if we have to
         */
        ring_nr = td->o.iodepth;
-       if (ring_nr & (ring_nr - 1)) {
-               int bits = 1;
-
-               while (ring_nr >>= 1)
-                       bits++;
-
-               ring_nr = 1 << bits;
-       }
+       if (ring_nr & (ring_nr - 1))
+               ring_nr = 1 << __fls(ring_nr);
 
        ring_size = sizeof(struct syslet_ring) +
                        ring_nr * sizeof(struct syslet_completion);
@@ -291,6 +292,7 @@ static struct ioengine_ops ioengine = {
        .cleanup        = fio_syslet_cleanup,
        .open_file      = generic_open_file,
        .close_file     = generic_close_file,
+       .get_file_size  = generic_get_file_size,
 };
 
 #else /* FIO_HAVE_SYSLET */