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This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
102 lines
2.5 KiB
Groff
102 lines
2.5 KiB
Groff
.\" Copyright 2017 IBM Corp.
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.\" s390-tools is free software; you can redistribute it and/or modify
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.\" it under the terms of the MIT license. See LICENSE for details.
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.\"
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.TH LSDASD 8 "Feb 2011" "s390-tools"
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.SH NAME
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dasdstat \- read or modify the statistics of the DASD device driver.
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.SH SYNOPSIS
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.TP 8
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.B dasdstat
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.RB [ -h ]
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.TP 8
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.B dasdstat
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.RB [ -e ]
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.RB [ -d ]
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.RB [ -r ]
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.RB [ -i ]
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.RB [ -l ]
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.RB [ -c ]
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.RB [ -w ]
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.RB [ -V ]
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.RB [ -v ]
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.RI [ <statistic> " [" <statistic> "] ...]]"
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.SH DESCRIPTION
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The dasdstat command provides easy access to the debugfs based
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statistics of the DASD device driver.
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The DASD statistics feature allows to gather statistical data for the
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I/O requests processed by the DASD device driver. This data can be
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collected for individual DASD CCW devices (including PAV base and
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alias devices), DASD block devices, or globally for all requests
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handled by the DASD device driver.
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When no other options are specified, then the default operation is to
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print the statistics data in a formatted table. When no specific list
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of statistics is given, then the operation will be performed on all
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available statistics.
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.SH OPTIONS
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.TP 8
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.BR -h | --help
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Print help text.
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.TP
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.BR -e | --enable
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Enable the statistics.
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.TP
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.BR -d | --disable
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Disable the statistics.
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.TP
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.BR -r | --reset
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Reset the statistics.
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.TP
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.BR -i | --directory
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Specify the directory in which the statistics can be found.
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.TP
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.BR -l | --long
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Print more detailed information, e.g differentiate between read and
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write requests.
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.TP
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.BR -c | --columns " \fI<number>\fR"
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Format the output in a table with the given number of columns.
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.TP
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.BR -w | --column-width " \fI<width>\fR"
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Set the minimum width of the columns in the output table.
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.TP
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.BR -V | --verbose
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Print more verbose information.
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.TP
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.BR -v | --version
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Print the version of the s390-tools package and the command.
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.TP
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\fB<statistic>\fR =
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Name of a statistic that the command should work on.
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.SH EXAMPLES
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\fBdasdstat\fR
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.RS
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Print a statistics table for each enabled statistic.
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.RE
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\fBdasdstat -e\fR
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.RS
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Enable all DASD statistics.
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.RE
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\fBdasdstat -l dasda 0.0.1800 0.0.18fe 0.0.18ff\fR
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.RS
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Print a detailed statistics table for DASD block device dasda and CCW
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devices 0.0.1800, 0.0.18fe and 0.0.18ff. A typical scenario for this
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example would be that dasda is the block device that belongs to
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PAV base device 0.0.1800, and CCW devices 0.0.18fe and 0.0.18ff are the
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associated alias devices.
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.RE
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.SH AUTHOR
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.nf
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This man-page was written by Stefan Weinhuber <wein@de.ibm.com>.
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.fi
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