FM / lwtools

/usr/share/systemtap/examples/lwtools

Name	Size	Mode	Actions
accept2close-nd.8	1424	0644	edit dl rm
accept2close-nd.meta	597	0644	edit dl rm
accept2close-nd.stp	1798	0755	edit dl rm
accept2close-nd.txt	3385	0644	edit dl rm
biolatency-nd.8	1671	0644	edit dl rm
biolatency-nd.meta	622	0644	edit dl rm
biolatency-nd.stp	2071	0755	edit dl rm
biolatency-nd_example.txt	7362	0644	edit dl rm
bitesize-nd.8	1157	0644	edit dl rm
bitesize-nd.meta	491	0644	edit dl rm
bitesize-nd.stp	1543	0755	edit dl rm
bitesize-nd_example.txt	3426	0644	edit dl rm
execsnoop-nd.8	1235	0644	edit dl rm
execsnoop-nd.meta	570	0644	edit dl rm
execsnoop-nd.stp	1283	0755	edit dl rm
execsnoop-nd_example.txt	2585	0644	edit dl rm
fslatency-nd.8	1930	0644	edit dl rm
fslatency-nd.meta	660	0644	edit dl rm
fslatency-nd.stp	3982	0755	edit dl rm
fslatency-nd_example.txt	13384	0644	edit dl rm
fsslower-nd.8	1753	0644	edit dl rm
fsslower-nd.meta	623	0644	edit dl rm
fsslower-nd.stp	3715	0755	edit dl rm
fsslower-nd_example.txt	1938	0644	edit dl rm
killsnoop-nd.8	1131	0644	edit dl rm
killsnoop-nd.meta	384	0644	edit dl rm
killsnoop-nd.stp	1281	0755	edit dl rm
killsnoop-nd_example.txt	1908	0644	edit dl rm
opensnoop-nd.8	1268	0644	edit dl rm
opensnoop-nd.meta	357	0644	edit dl rm
opensnoop-nd.stp	1026	0755	edit dl rm
opensnoop-nd_example.txt	1124	0644	edit dl rm
README	107	0644	edit dl rm
rwtime-nd.8	1146	0644	edit dl rm
rwtime-nd.meta	412	0644	edit dl rm
rwtime-nd.stp	1599	0755	edit dl rm
rwtime-nd_example.txt	4185	0644	edit dl rm
syscallbypid-nd.8	1089	0644	edit dl rm
syscallbypid-nd.meta	404	0644	edit dl rm
syscallbypid-nd.stp	1100	0755	edit dl rm
syscallbypid-nd_example.txt	9322	0644	edit dl rm

Edit: /usr/share/systemtap/examples/lwtools/bitesize-nd.8 (1157B)

.TH bitesize-nd 8  "2015-01-30" "USER COMMANDS"
.SH NAME
bitesize-nd \- Measure block I/O size distribution. Uses Linux SystemTap (non-debuginfo).
.SH SYNOPSIS
.B bitesize-nd.stp
.SH DESCRIPTION
This uses the kernel tracepoint block_rq_insert to read the size of I/O. The
output includes the name of the process or thread that was on-CPU when the I/O
request was inserted on the issue queue.
.SH REQUIREMENTS
SystemTap.
.SH EXAMPLES
.TP
Measure block I/O sizes, and show a distribution histogram for each process name on Ctrl-C:
#
.B bitesize-nd.stp
.SH FIELDS
.TP
value
The minimum size, in bytes, for this histogram bucket. Read this value
as "I/O size was at least xxx".
.TP
count
How many I/O fell into this size range.
.SH OVERHEAD
Should be low, relative to the rate of disk I/O. Test first.
.SH SOURCE
This is from the SystemTap lwtools collection.
.IP
https://github.com/brendangregg/systemtap-lwtools
.PP
Also look under the examples directory for a text file containing example
usage, output, and commentary for this tool.
.SH OS
Linux
.SH STABILITY
Unstable - in development.
.SH AUTHOR
Brendan Gregg
.SH SEE ALSO
biolatency-nd.stp(8), iostat(1)

.TH bitesize-nd 8 "2015-01-30" "USER COMMANDS" .SH NAME bitesize-nd \- Measure block I/O size distribution. Uses Linux SystemTap (non-debuginfo). .SH SYNOPSIS .B bitesize-nd.stp .SH DESCRIPTION This uses the kernel tracepoint block_rq_insert to read the size of I/O. The output includes the name of the process or thread that was on-CPU when the I/O request was inserted on the issue queue. .SH REQUIREMENTS SystemTap. .SH EXAMPLES .TP Measure block I/O sizes, and show a distribution histogram for each process name on Ctrl-C: # .B bitesize-nd.stp .SH FIELDS .TP value The minimum size, in bytes, for this histogram bucket. Read this value as "I/O size was at least xxx". .TP count How many I/O fell into this size range. .SH OVERHEAD Should be low, relative to the rate of disk I/O. Test first. .SH SOURCE This is from the SystemTap lwtools collection. .IP https://github.com/brendangregg/systemtap-lwtools .PP Also look under the examples directory for a text file containing example usage, output, and commentary for this tool. .SH OS Linux .SH STABILITY Unstable - in development. .SH AUTHOR Brendan Gregg .SH SEE ALSO biolatency-nd.stp(8), iostat(1)