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authorDaniel Baumann <daniel.baumann@progress-linux.org>2021-07-02 20:47:46 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2021-07-02 20:47:46 +0000
commit5b7ddc4bd2dcdde201ffa2681ede9a0a029bad96 (patch)
tree352b477f97c1c36105310589c7568259c76e9385 /Documentation/nvme-predictable-lat-log.1
parentAdding upstream version 1.12. (diff)
downloadnvme-cli-5b7ddc4bd2dcdde201ffa2681ede9a0a029bad96.tar.xz
nvme-cli-5b7ddc4bd2dcdde201ffa2681ede9a0a029bad96.zip
Adding upstream version 1.14.upstream/1.14
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+'\" t
+.\" Title: nvme-predictable-lat-log
+.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
+.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
+.\" Date: 01/13/2021
+.\" Manual: NVMe Manual
+.\" Source: NVMe
+.\" Language: English
+.\"
+.TH "NVME\-PREDICTABLE\-L" "1" "01/13/2021" "NVMe" "NVMe Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+nvme-predictable-lat-log \- Send Predectible latency per NVM set log page request, returns result and log
+.SH "SYNOPSIS"
+.sp
+.nf
+\fInvme predictable\-lat\-log\fR <device> [\-\-nvmset\-id=<nvmset_id> | \-i <nvmset_id>]
+ [\-\-raw\-binary | \-b]
+ [\-\-output\-format=<fmt> | \-o <fmt>]
+.fi
+.SH "DESCRIPTION"
+.sp
+Retrieves the NVMe Predectible latency per NVM set log page from an NVMe device and provides the returned structure\&.
+.sp
+The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1)\&.
+.sp
+On success, the returned Predectible latency per NVM set log structure may be returned in one ofseveral ways depending on the option flags; the structure may parsed by the program and printed in a readable format or the raw buffer may be printed to stdout for another program to parse\&.
+.SH "OPTIONS"
+.PP
+\-i <nvmset_id>, \-\-nvmset\-id=<nvmset_id>
+.RS 4
+Retrieve the Predectible latency per NVM set log for the given nvmset id\&. This argument is mandatory and its success may depend on the device\(cqs statistics to provide this log For More details see NVM Express 1\&.4 Spec\&. Section 5\&.14\&.1\&.10\&. The default nvmset id to use is 1 for the device\&.
+.RE
+.PP
+\-b, \-\-raw\-binary
+.RS 4
+Print the raw Predectible latency per NVM set log buffer to stdout\&.
+.RE
+.PP
+\-o <format>, \-\-output\-format=<format>
+.RS 4
+Set the reporting format to
+\fInormal\fR,
+\fIjson\fR, or
+\fIbinary\fR\&. Only one output format can be used at a time\&.
+.RE
+.SH "EXAMPLES"
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
+Print the Predectible latency per NVM set log page in a human readable format:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+# nvme predictable\-lat\-log /dev/nvme0
+.fi
+.if n \{\
+.RE
+.\}
+.RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
+Print the raw Predectible latency per NVM set log to a file:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+# nvme predictable\-lat\-log /dev/nvme0 \-\-raw\-binary > nvmset_log\&.raw
+.fi
+.if n \{\
+.RE
+.\}
+.sp
+It is probably a bad idea to not redirect stdout when using this mode\&.
+.RE
+.SH "NVME"
+.sp
+Part of the nvme\-user suite