'new_group' option

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 460b456ce44b312a016346a62c30a7a8093bb86b..d8c09d07aa40ddb4829c79a0a30b60a4f0c4b1f7 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -539,7 +539,13 @@ 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
 
 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
 
 numjobs=int    Create the specified number of clones of this job. May be
                used to setup a larger number of threads/processes doing


@@ -652,7 +658,7 @@ they denote:
 io=            Number of megabytes io performed
 bw=            Average bandwidth rate
 runt=          The runtime of that thread
 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.
                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.