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blkiomon(8) [centos man page]

BLKIOMON(8)															       BLKIOMON(8)

NAME
blkiomon - monitor block device I/O based o blktrace data SYNOPSIS
blkiomon -I interval [ -h file ] [ -b file ] [ -d file ] [ -D file ] [ -Q path_name -q msg_queue_id -m msg_id ] [ -V ] DESCRIPTION
blkiomon is a block device I/O monitor. It periodically generates per-device request size and request latency statistics from blktrace data. It provides histograms as well as data that can be used to calculate min, max, average and variance. For this purpose, it consumes D and C traces read from stdin. Note, that this doesn't work for logical volumes, as high-level drivers don't see the completion of the events (C). There are options for binary output and human-readable output to files and stdout. Output to a message queue is supported as well. There is no need to use blkparse with blkiomon. blkiomon is capable of consuming binary output written to stdout by blktrace. OPTIONS
-I interval --interval=interval Set sample interval -h file --human-readable=file Human-readable output file. Use '-' for stdout. -b file --binary=file Binary output file. Use '-' for stdout. -d file --dump-lldd=file Output file for data emitted by low level device driver. -D file --debug=file Output file for debugging data. Use '-' for stdout. -Q path_name --msg-queue=path_name Sets path_name as path name for existing message queue to be used for binary output. -q msg_queue_id --msg-queue-id=msg_queue_id Sets msg_queue_id as ID for an existing message queue to be used for binary output. -m msg_id --msg-id=msg_id Sets msg_id as message identifier to be used for binary output messages written to an existing message queue. -V --version Print program version. EXAMPLES
To get I/O statistics for /dev/sdw every 10 seconds for a period of one hour, use the following command: % blktrace /dev/sdw -a issue -a complete -w 3600 -o - | blkiomon -I 10 -h - AUTHORS
blkiomon and this man page were written by Martin Peschke. REPORTING BUGS
Report bugs to <linux-btrace@vger.kernel.org> COPYRIGHT
Copyright (C) 2008 IBM Corp. This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
btrace (8), blktrace (8), blkparse (1), verify_blkparse (1), blkrawverify (1), btt (1) July 17, 2008 BLKIOMON(8)

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BNO_PLOT(1)															       BNO_PLOT(1)

NAME
bno_plot - generate interactive 3D plot of IO blocks and sizes SYNOPSIS
bno_plot [ -h | --help ] [ -v | --verbose ] [ -K | --keys-below ] [ <file...> ] DESCRIPTION
bno_plot is a visualization tool for the block layer IO tracing tool called blktrace(8). As noted in its documentation, blktrace is a block layer IO tracing mechanism which provides detailed information about request queue operations up to user space. bno_plot utilizes gnuplot to generate a 3D plot of the block number output from btt. If no <files> are specified, it will utilize all files generated after btt was run with -B blknos (meaning: all files of the form blknos*[rw].dat). The -K option forces bno_plot to put the keys below the graph. If it is not specified, all keys for input files are put in the upper right corner of the graph. If the number of devices exceed 10, then bno_plot will automatically push the keys under the graph. To use this utility, the gnuplot package needs to be installed. To exit the plotter, enter 'quit' or ^D at the 'gnuplot> ' prompt. AUTHORS
bno_plot was written by Alan D. Brunelle. This man page was created from the blktrace documentation by Bas Zoetekouw. REPORTING BUGS
Report bugs to <linux-btrace@vger.kernel.org> COPYRIGHT
Copyright (C) 2008 Hewlett-Packard Development Company, L.P. This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law. This manual page was created for Debian by Bas Zoetekouw. It was derived from the documentation provided by the authors and it may be used, distributed and modified under the terms of the GNU General Public License, version 2. On Debian systems, the text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-2. SEE ALSO
btt (1), gnuplot (1), blktrace (8), blkparse (1), verify_blkparse (1), blkrawverify (1) blktrace git-20080213182518 February 22, 2007 BNO_PLOT(1)
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