ioping: document defaults in man and help

Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>

ioping.1

@@ -30,19 +30,19 @@ Stop after \fIdeadline\fR time passed.
 Print raw statistics for every \fIperiod\fR requests.
 .TP
 .BI \-i \ interval
-Set time between requests to \fIinterval\fR.
+Set time between requests to \fIinterval\fR (\fB1s\fR).
 .TP
 .BI \-s \ size
-Request size.
+Request size (\fB4k\fR).
 .TP
 .BI \-S \ size
-Working set size.
+Working set size (\fB1m\fR).
 .TP
 .BI \-o \ offset
 Offset in input file.
 .TP
 .B \-L
-Use sequential operations rather than random (imply \fB-s 256k\fR).
+Use sequential operations rather than random (include \fB-s 256k\fR).
 .TP
 .B \-C
 Use cached I/O.

ioping.c

@@ -92,11 +92,11 @@ void usage(void)
 			"      -c <count>      stop after <count> requests\n"
 			"      -w <deadline>   stop after <deadline>\n"
 			"      -p <period>     print raw statistics for every <period> requests\n"
-			"      -i <interval>   interval between requests\n"
-			"      -s <size>       request size\n"
-			"      -S <wsize>      working set size\n"
+			"      -i <interval>   interval between requests (1s)\n"
+			"      -s <size>       request size (4k)\n"
+			"      -S <wsize>      working set size (1m)\n"
 			"      -o <offset>     in file offset\n"
-			"      -L              use sequential operations rather than random\n"
+			"      -L              use sequential operations (include -s 256k)\n"
 			"      -C              use cached-io\n"
 			"      -D              use direct-io\n"
 			"      -R              seek rate test (same as -q -i 0 -w 3 -S 64m)\n"