X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=76613714a14a063b4adc3133ee954f2b966748aa;hb=2b4ce34fac9f3031dc8606d6cd640c61a74d7df7;hp=c14039318175c6170dbec9c3c7be55d80ff16801;hpb=4e991c23d2d06484f581eb5e2105bc102cb35941;p=fio.git

diff --git a/HOWTO b/HOWTO
index c1403931..76613714 100644
--- a/HOWTO
+++ b/HOWTO
@@ -216,6 +216,7 @@ filename=str	Fio normally makes up a filename based on the job name,
 opendir=str	Tell fio to recursively add any file it can find in this
 		directory and down the file system tree.
 
+readwrite=str
 rw=str		Type of io pattern. Accepted values are:
 
 			read		Sequential reads
@@ -244,6 +245,7 @@ filesize=siint	Individual file sizes. May be a range, in which case fio
 		and limited to 'size' in total (if that is given). If not
 		given, each created file is the same size.
 
+blocksize=siint
 bs=siint	The block size used for the io units. Defaults to 4k. Values
 		can be given for both read and writes. If a single siint is
 		given, it will apply to both. If a second siint is specified
@@ -254,6 +256,7 @@ bs=siint	The block size used for the io units. Defaults to 4k. Values
 		can do so by passing an empty read size - bs=,8k will set
 		8k for writes and leave the read default value.
 
+blocksize_range=irange
 bsrange=irange	Instead of giving a single block size, specify a range
 		and fio will mix the issued io block sizes. The issued
 		io unit will always be a multiple of the minimum value
@@ -261,6 +264,7 @@ bsrange=irange	Instead of giving a single block size, specify a range
 		writes, however a second range can be given after a comma.
 		See bs=.
 
+blocksize_unaligned
 bs_unaligned	If this option is given, any byte size value within bsrange
 		may be used as a block range. This typically wont work with
 		direct IO, as that normally requires sector alignment.
@@ -326,6 +330,14 @@ ioengine=str	Defines how the job issues io to the file. The following
 				will cause that job to do nothing but burn
 				85% of the CPU.
 
+			guasi	The GUASI IO engine is the Generic Userspace
+				Asyncronous Syscall Interface approach
+				to async IO. See
+
+				http://www.xmailserver.org/guasi-lib.html
+
+				for more info on GUASI.
+
 			external Prefix to specify loading an external
 				IO engine object file. Append the engine
 				filename, eg ioengine=external:/tmp/foo.o
@@ -452,6 +464,7 @@ invalidate=bool	Invalidate the buffer/page cache parts for this file prior
 sync=bool	Use sync io for buffered writes. For the majority of the
 		io engines, this means using O_SYNC.
 
+iomem=str
 mem=str		Fio can use various types of memory as the io unit buffer.
 		The allowed values are:
 
@@ -534,7 +547,13 @@ verify=str	If writing to a file, fio can verify the file contents
 
 stonewall	Wait for preceeding jobs in the job file to exit, before
 		starting this one. Can be used to insert serialization
-		points in the job file.
+		points in the job file. A stone wall also implies starting
+		a new reporting group.
+
+new_group	Start a new reporting group. If this option isn't given,
+		jobs in a file will be part of the same reporting group
+		unless seperated by a stone wall (or if it's a group
+		by itself, with the numjobs option).
 
 numjobs=int	Create the specified number of clones of this job. May be
 		used to setup a larger number of threads/processes doing
@@ -647,7 +666,7 @@ they denote:
 io=		Number of megabytes io performed
 bw=		Average bandwidth rate
 runt=		The runtime of that thread
-	slat=	Submission latency (avg being the average, dev being the
+	slat=	Submission latency (avg being the average, stdev being the
 		standard deviation). This is the time it took to submit
 		the io. For sync io, the slat is really the completion
 		latency, since queue/complete is one operation there.