HOWTO/fio(1) mention defaults for many of the available options. This commit adds defaults for the following options. readwrite= ioengine= mem= Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@xxxxxxxxx> --- HOWTO | 6 +++++- fio.1 | 6 ++++-- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/HOWTO b/HOWTO index ca114a4..7f25bbc 100644 --- a/HOWTO +++ b/HOWTO @@ -405,6 +405,7 @@ rw=str Type of io pattern. Accepted values are: trimwrite Mixed trims and writes. Blocks will be trimmed first, then written to. + Fio defaults to read if the option is not specified. For the mixed io types, the default is to split them 50/50. For certain types of io the result may still be skewed a bit, since the speed may be different. It is possible to specify @@ -699,7 +700,8 @@ ioengine=str Defines how the job issues io to the file. The following sync Basic read(2) or write(2) io. lseek(2) is used to position the io location. - psync Basic pread(2) or pwrite(2) io. + psync Basic pread(2) or pwrite(2) io. Default on all + supported operating systems except for Windows. vsync Basic readv(2) or writev(2) IO. @@ -717,6 +719,7 @@ ioengine=str Defines how the job issues io to the file. The following solarisaio Solaris native asynchronous io. windowsaio Windows native asynchronous io. + Default on Windows. mmap File is memory mapped and data copied to/from using memcpy(3). @@ -1221,6 +1224,7 @@ mem=str Fio can use various types of memory as the io unit buffer. The allowed values are: malloc Use memory from malloc(3) as the buffers. + Default memory type. shm Use shared memory as the buffers. Allocated through shmget(2). diff --git a/fio.1 b/fio.1 index ac8e205..739d950 100644 --- a/fio.1 +++ b/fio.1 @@ -309,6 +309,7 @@ Trim and write mixed workload. Blocks will be trimmed first, then the same blocks will be written to. .RE .P +Fio defaults to read if the option is not specified. For mixed I/O, the default split is 50/50. For certain types of io the result may still be skewed a bit, since the speed may be different. It is possible to specify a number of IO's to do before getting a new offset, this is done by @@ -602,6 +603,7 @@ position the I/O location. .TP .B psync Basic \fBpread\fR\|(2) or \fBpwrite\fR\|(2) I/O. +Default on all supported operating systems except for Windows. .TP .B vsync Basic \fBreadv\fR\|(2) or \fBwritev\fR\|(2) I/O. Will emulate queuing by @@ -623,7 +625,7 @@ POSIX asynchronous I/O using \fBaio_read\fR\|(3) and \fBaio_write\fR\|(3). Solaris native asynchronous I/O. .TP .B windowsaio -Windows native asynchronous I/O. +Windows native asynchronous I/O. Default on Windows. .TP .B mmap File is memory mapped with \fBmmap\fR\|(2) and data copied using @@ -1150,7 +1152,7 @@ Allocation method for I/O unit buffer. Allowed values are: .RS .TP .B malloc -Allocate memory with \fBmalloc\fR\|(3). +Allocate memory with \fBmalloc\fR\|(3). Default memory type. .TP .B shm Use shared memory buffers allocated through \fBshmget\fR\|(2). -- 2.5.5 -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
