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| author | David Sommerseth <davids@redhat.com> | 2010-02-24 17:29:46 +0100 |
|---|---|---|
| committer | David Sommerseth <davids@redhat.com> | 2010-02-24 17:29:46 +0100 |
| commit | bd43983e36605481f3732925d8bc0d3eb0557d4b (patch) | |
| tree | 471a175e4ced2ee67566993773decd269b93a6aa | |
| parent | 94d8566d6ccaf090ad44611a6f99a3b540798029 (diff) | |
| download | rt-tests-bd43983e36605481f3732925d8bc0d3eb0557d4b.tar.gz | |
Updated hackbench man page with some examples and some extra details re. fds
| -rw-r--r-- | src/hackbench/hackbench.8 | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/src/hackbench/hackbench.8 b/src/hackbench/hackbench.8 index bedb2fc..d86c52f 100644 --- a/src/hackbench/hackbench.8 +++ b/src/hackbench/hackbench.8 @@ -35,7 +35,10 @@ How many messages each sender/receiver pair should send Defines how many groups of senders and receivers should be started .TP .B \-f, \-\-fds=<number of file descriptors> -Defines how many file descriptors each group of senders and receivers should use +Defines how many file descriptors each child should use. +Note that the effective number will be twice the amount you set here, +as the sender and receiver children will each open the given amount of +file descriptors. .TP .B \-T, \-\-threads Each sender/receiver child will be a POSIX thread of the parent. @@ -46,6 +49,39 @@ Hackbench will use fork() on all children (default behaviour) .B \-\-help .br Shows a simple help screen +.SH "EXAMPLES" +.LP +Running hackbench without any options will give default behaviour, +using fork() and sending data between senders and receivers via sockets. +.LP +user@host: ~ $ hackbench +.br +Running in process mode with 10 groups using 40 file descriptors each (== 400 tasks) +.br +Each sender will pass 100 messages of 100 bytes +.br +Time: 0.890 +.LP +To use pipes between senders and receivers and using threads instead of fork(), run +.LP +user@host: ~ $ hackbench \-\-pipe \-\-threads (or hackbench \-p \-T) +.br +Running in threaded mode with 10 groups using 40 file descriptors each (== 400 tasks) +.br +Each sender will pass 100 messages of 100 bytes +.br +Time: 0.497 +.LP +Set the datasize to 512 bytes, do 200 messages per sender/receiver pairs and use 15 groups +using 25 file descriptors per child, in process mode. +.LP +user@host: ~ $ hackbench \-s 512 \-l 200 \-g 15 \-f 25 \-P +.br +Running in process mode with 15 groups using 50 file descriptors each (== 750 tasks) +.br +Each sender will pass 200 messages of 512 bytes +.br +Time: 4.497 .SH "AUTHORS" .LP hackbench was written by Rusty Russell <rusty@rustcorp.com.au> |