From a4f3198f0b774528ef17dfb1ce5b3e70b6eb82fb Mon Sep 17 00:00:00 2001 From: William Cohen Date: Tue, 2 Feb 2010 14:19:02 -0500 Subject: Add iodevstats.stp example --- testsuite/systemtap.examples/index.html | 3 +++ 1 file changed, 3 insertions(+) (limited to 'testsuite/systemtap.examples/index.html') diff --git a/testsuite/systemtap.examples/index.html b/testsuite/systemtap.examples/index.html index 294c6991..83c82d29 100644 --- a/testsuite/systemtap.examples/index.html +++ b/testsuite/systemtap.examples/index.html @@ -73,6 +73,9 @@ keywords: IO io/ioblktime.stp - Average Time Block IO Requests Spend in Queue
keywords: IO

The ioblktime.stp script tracks the amount of time that each block IO requests spend waiting for completion. The script computes the average waiting time for block IO per device and prints list every 10 seconds. In some cases there can be too many outstanding block IO operations and the script may exceed the default number of MAXMAPENTRIES allowed. In this case the allowed number can be increased with "-DMAXMAPENTRIES=10000" option on the stap command line.

+
  • io/iodevstats.stp - List Executables Reading and Writing the Most Data by Device
    +keywords: IO PROFILING
    +

    The iodevstats.stp script measures the amount of data successfully read and written by all the executables for each io device on the system. The output is sorted from greatest sum of bytes read and written to a device by an executable to the least. The output contains device major/minor number, the count of operations (reads and writes), the totals and averages for the number of bytes read and written.

  • io/iostat-scsi.stp - iostat for SCSI Devices
    keywords: IO PROFILING SCSI

    The iostat-scsi.stp script provides a breakdown of the number of blks read and written on the machine's various SCSI devices. The script takes one argument which is the number of seconds between reports.

    • -- cgit