engines/libaio: fix wrong setting of wait_start

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 693eeb11b12ac28f29804ee3776ae6570f732780..e18eadb11811879ac20dd1272041c95d5bf2cbde 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -253,7 +253,20 @@ machine.
 
 This section describes in details each parameter associated with a job.
 Some parameters take an option of a given type, such as an integer or
-a string. The following types are used:
+a string. Anywhere a numeric value is required, an arithmetic expression
+may be used, provided it is surrounded by parentheses. Supported operators
+are:
+
+       addition (+)
+       subtraction (-)
+       multiplication (*)
+       division (/)
+       modulus (%)
+       exponentiation (^)
+
+For time values in expressions, units are microseconds by default. This is
+different than for time values not in expressions (not enclosed in
+parentheses). The following types are used:
 
 str    String. This is a sequence of alpha characters.
 time   Integer with possible time suffix. In seconds unless otherwise
@@ -1627,7 +1640,9 @@ that defines them is selected.
                address.
 
 [netsplice] port=int
-[net] port=int The TCP or UDP port to bind to or connect to.
+[net] port=int The TCP or UDP port to bind to or connect to. If this is used
+with numjobs to spawn multiple instances of the same job type, then this will
+be the starting port number since fio will use a range of ports.
 
 [netsplice] interface=str
 [net] interface=str  The IP address of the network interface used to send or
@@ -1659,6 +1674,7 @@ that defines them is selected.
 [net] listen   For TCP network connections, tell fio to listen for incoming
                connections rather than initiating an outgoing connection. The
                hostname must be omitted if this option is used.
+
 [net] pingpong Normaly a network writer will just continue writing data, and
                a network reader will just consume packages. If pingpong=1
                is set, a writer will send its normal payload to the reader,
@@ -1671,6 +1687,10 @@ that defines them is selected.
                single reader when multiple readers are listening to the same
                address.
 
+[net] window_size      Set the desired socket buffer size for the connection.
+
+[net] mss      Set the TCP maximum segment size (TCP_MAXSEG).
+
 [e4defrag] donorname=str
                File will be used as a block donor(swap extents between files)
 [e4defrag] inplace=int