X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=de4b0a9932b43f207260a569a5e33349efebc63b;hb=ec1aee01a92f2e390d7ca14d26eebf6453780c53;hp=ea98810a211d97328232dfb593f84654cfa2f331;hpb=e916b390684ec1ca6247f98138fa9c1682701d29;p=fio.git

diff --git a/HOWTO b/HOWTO
index ea98810a..de4b0a99 100644
--- a/HOWTO
+++ b/HOWTO
@@ -294,6 +294,10 @@ iodepth=int	This defines how many io units to keep in flight against
 		job, can be overridden with a larger value for higher
 		concurrency.
 
+iodepth_batch=int This defines how many pieces of IO to submit at once.
+		It defaults to the same as iodepth, but can be set lower
+		if one so desires.
+
 iodepth_low=int	The low water mark indicating when to start filling
 		the queue again. Defaults to the same as iodepth, meaning
 		that fio will attempt to keep the queue full at all times.
@@ -570,8 +574,8 @@ Client1 (g=0): err= 0:
     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
   IO depths    : 1=0.1%, 2=0.3%, 4=0.5%, 8=99.0%, 16=0.0%, 32=0.0%, >32=0.0%
-     lat (msec): 2=1.6%, 4=0.0%, 8=3.2%, 16=12.8%, 32=38.4%, 64=24.8%, 128=15.2%
-     lat (msec): 256=4.0%, 512=0.0%, 1024=0.0%, >=2048=0.0%
+     lat (msec): 2=1.6%, 4=0.0%, 10=3.2%, 20=12.8%, 50=38.4%, 100=24.8%,
+     lat (msec): 250=15.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2048=0.0%
 
 The client number is printed, along with the group id and error of that
 thread. Below is the io statistics, here for writes. In the order listed,
@@ -605,8 +609,8 @@ IO latencies=	The distribution of IO completion latencies. This is the
 		time from when IO leaves fio and when it gets completed.
 		The numbers follow the same pattern as the IO depths,
 		meaning that 2=1.6% means that 1.6% of the IO completed
-		within 2 msecs, 16=12.8% means that 12.8% of the IO
-		took more than 8 msecs, but less than (or equal to) 16 msecs.
+		within 2 msecs, 20=12.8% means that 12.8% of the IO
+		took more than 10 msecs, but less than (or equal to) 20 msecs.
 
 After each client has been listed, the group statistics are printed. They
 will look like this: