Merge branch 'travis_32bit' of https://github.com/sitsofe/fio

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 6ecc0a6b2351c1df9ee4def47d2a3989dcb0c54d..2a70b7c629b6d6470625ac98e02dad555571f1ed 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -111,9 +111,6 @@ Command line options
        format.  `json+` is like `json`, except it adds a full dump of the latency
        buckets.
 
-.. option:: --runtime
-       Limit run time to runtime seconds.
-
 .. option:: --bandwidth-log
 
        Generate aggregate bandwidth logs.
@@ -505,19 +502,19 @@ Parameter types
        prefixes.  To specify power-of-10 decimal values defined in the
        International System of Units (SI):
 
-               * *Ki* -- means kilo (K) or 1000
-               * *Mi* -- means mega (M) or 1000**2
-               * *Gi* -- means giga (G) or 1000**3
-               * *Ti* -- means tera (T) or 1000**4
-               * *Pi* -- means peta (P) or 1000**5
+               * *K* -- means kilo (K) or 1000
+               * *M* -- means mega (M) or 1000**2
+               * *G* -- means giga (G) or 1000**3
+               * *T* -- means tera (T) or 1000**4
+               * *P* -- means peta (P) or 1000**5
 
        To specify power-of-2 binary values defined in IEC 80000-13:
 
-               * *K* -- means kibi (Ki) or 1024
-               * *M* -- means mebi (Mi) or 1024**2
-               * *G* -- means gibi (Gi) or 1024**3
-               * *T* -- means tebi (Ti) or 1024**4
-               * *P* -- means pebi (Pi) or 1024**5
+               * *Ki* -- means kibi (Ki) or 1024
+               * *Mi* -- means mebi (Mi) or 1024**2
+               * *Gi* -- means gibi (Gi) or 1024**3
+               * *Ti* -- means tebi (Ti) or 1024**4
+               * *Pi* -- means pebi (Pi) or 1024**5
 
        With :option:`kb_base`\=1024 (the default), the unit prefixes are opposite
        from those specified in the SI and IEC 80000-13 standards to provide
@@ -950,7 +947,7 @@ I/O type
 .. option:: direct=bool
 
        If value is true, use non-buffered I/O. This is usually O_DIRECT. Note that
-       ZFS on Solaris doesn't support direct I/O.  On Windows the synchronous
+       OpenBSD and ZFS on Solaris don't support direct I/O.  On Windows the synchronous
        ioengines don't support direct I/O.  Default: false.
 
 .. option:: atomic=bool
@@ -1794,7 +1791,9 @@ I/O engine
                **external**
                        Prefix to specify loading an external I/O engine object file. Append
                        the engine filename, e.g. ``ioengine=external:/tmp/foo.o`` to load
-                       ioengine :file:`foo.o` in :file:`/tmp`.
+                       ioengine :file:`foo.o` in :file:`/tmp`. The path can be either
+                       absolute or relative. See :file:`engines/skeleton_external.c` for
+                       details of writing an external I/O engine.
 
 
 I/O engine specific parameters
@@ -3584,7 +3583,7 @@ and IOPS. The logs share a common format, which looks like this:
 on the type of log, it will be one of the following:
 
     **Latency log**
-               Value is latency in usecs
+               Value is latency in nsecs
     **Bandwidth log**
                Value is in KiB/sec
     **IOPS log**