It basically has the same interface as Linux kernel's ioprio_set(2),
but needed to workaround a compile issue by defining it as a macro
as mentioned in a comment (it can be called without syscall(NR, ...)).
This commit is based on the last two commits which made I/O priority
option more generic for non Linux environment.
# uname
DragonFly
# fio --cmdhelp | grep prioclass -B1
prio : Set job IO priority value
prioclass : Your platform does not support IO priority classes
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@xxxxxxxxx>
---
HOWTO | 3 ++-
os/os-dragonfly.h | 18 ++++++++++++++++++
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/HOWTO b/HOWTO
index 2a4f4d0..ab25cb2 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1064,7 +1064,8 @@ nice=int Run the job with the given nice value. See man nice(2).
prio=int Set the io priority value of this job. Linux limits us to
a positive value between 0 and 7, with 0 being the highest.
- See man ionice(1).
+ See man ionice(1). Refer to an appropriate manpage for
+ other operating systems since meaning of priority may differ.
prioclass=int Set the io priority class. See man ionice(1).
diff --git a/os/os-dragonfly.h b/os/os-dragonfly.h
index 57958ca..187330b 100644
--- a/os/os-dragonfly.h
+++ b/os/os-dragonfly.h
@@ -11,6 +11,7 @@
#include <sys/diskslice.h>
#include <sys/ioctl_compat.h>
#include <sys/usched.h>
+#include <sys/resource.h>
#include "../file.h"
@@ -22,6 +23,7 @@
#define FIO_HAVE_CHARDEV_SIZE
#define FIO_HAVE_GETTID
#define FIO_HAVE_CPU_AFFINITY
+#define FIO_HAVE_IOPRIO
#define OS_MAP_ANON MAP_ANON
@@ -151,6 +153,22 @@ static inline void fio_getaffinity(int pid, os_cpu_mask_t *mask)
usched_set(pid, USCHED_GET_CPUMASK, mask, sizeof(*mask));
}
+/* fio code is Linux based, so rename macros to Linux style */
+#define IOPRIO_WHO_PROCESS PRIO_PROCESS
+#define IOPRIO_WHO_PGRP PRIO_PGRP
+#define IOPRIO_WHO_USER PRIO_USER
+
+#define IOPRIO_MIN_PRIO 1 /* lowest priority */
+#define IOPRIO_MAX_PRIO 10 /* highest priority */
+
+/*
+ * Prototypes declared in sys/sys/resource.h are preventing from defining
+ * ioprio_set() with 4 arguments, so define fio's ioprio_set() as a macro.
+ * Note that there is no idea of class within ioprio_set(2) unlike Linux.
+ */
+#define ioprio_set(which, who, ioprio_class, ioprio) \
+ ioprio_set(which, who, ioprio)
+
static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
{
struct partinfo pi;
--
2.5.5
--
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