X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=24171e9b2f3ef7feeae341aa870155871726673c;hb=5a32012f174baf33978b041cffa36453f2d92947;hp=a07cf8848923245891b9c76bc3778e5c460a6856;hpb=6d16ecb6890ad4078437414b9a3b514e39a74bf1;p=fio.git

diff --git a/HOWTO b/HOWTO
index a07cf884..24171e9b 100644
--- a/HOWTO
+++ b/HOWTO
@@ -314,6 +314,8 @@ 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.
+
 			libaio	Linux native asynchronous io.
 
 			posixaio glibc posix asynchronous io.
@@ -347,7 +349,7 @@ ioengine=str	Defines how the job issues io to the file. The following
 			netsplice Like net, but uses splice/vmsplice to
 				map data and send/receive.
 
-			cpu	Doesn't transfer any data, but burns CPU
+			cpuio	Doesn't transfer any data, but burns CPU
 				cycles according to the cpuload= and
 				cpucycle= options. Setting cpuload=85
 				will cause that job to do nothing but burn
@@ -569,6 +571,9 @@ loops=int	Run the specified number of iterations of this job. Used
 		to repeat the same workload a given number of times. Defaults
 		to 1.
 
+do_verify=bool	Run the verify phase after a write phase. Only makes sense if
+		verify is set. Defaults to 1.
+
 verify=str	If writing to a file, fio can verify the file contents
 		after each iteration of the job. The allowed values are:
 
@@ -588,6 +593,23 @@ verify=str	If writing to a file, fio can verify the file contents
 			crc7	Use a crc7 sum of the data area and store
 				it in the header of each block.
 
+			sha512	Use sha512 as the checksum function.
+
+			sha256	Use sha256 as the checksum function.
+
+			meta	Write extra information about each io
+				(timestamp, block number etc.). The block
+				number is verified.
+
+			pattern	Fill the IO buffers with a specific pattern,
+				that we can use to verify. Depending on the
+				width of the pattern, fio will fill 1/2/3/4
+				bytes of the buffer at the time. The pattern
+				cannot be larger than a 32-bit quantity. The
+				given pattern is given as a postfix to this
+				option, ala: verify=pattern:0x5a. It accepts
+				both hex and dec values.
+
 			null	Only pretend to verify. Useful for testing
 				internals with ioengine=null, not for much
 				else.
@@ -612,6 +634,11 @@ verify_interval=siint	Write the verification header at a finer granularity
 			than the blocksize. It will be written for chunks the
 			size of header_interval. blocksize should divide this
 			evenly.
+
+verify_fatal=bool	Normally fio will keep checking the entire contents
+		before quitting on a block verification failure. If this
+		option is set, fio will exit the job on the first observed
+		failure.
 		
 stonewall	Wait for preceeding jobs in the job file to exit, before
 		starting this one. Can be used to insert serialization
@@ -731,7 +758,7 @@ Client1 (g=0): err= 0:
     slat (msec): min=    0, max=  136, avg= 0.03, stdev= 1.92
     clat (msec): min=    0, max=  631, avg=48.50, stdev=86.82
     bw (KiB/s) : min=    0, max= 1196, per=51.00%, avg=664.02, stdev=681.68
-  cpu        : usr=1.49%, sys=0.25%, ctx=7969
+  cpu        : usr=1.49%, sys=0.25%, ctx=7969, majf=0, minf=17
   IO depths    : 1=0.1%, 2=0.3%, 4=0.5%, 8=99.0%, 16=0.0%, 32=0.0%, >32=0.0%
      issued r/w: total=0/32768, short=0/0
      lat (msec): 2=1.6%, 4=0.0%, 10=3.2%, 20=12.8%, 50=38.4%, 100=24.8%,
@@ -762,7 +789,9 @@ runt=		The runtime of that thread
 		only really useful if the threads in this group are on the
 		same disk, since they are then competing for disk access.
 cpu=		CPU usage. User and system time, along with the number
-		of context switches this thread went through.
+		of context switches this thread went through, usage of
+		system and user time, and finally the number of major
+		and minor page faults.
 IO depths=	The distribution of io depths over the job life time. The
 		numbers are divided into powers of 2, so for example the
 		16= entries includes depths up to that value but higher