'\" t
.\"     Title: nvme-predictable-lat-log
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 02/14/2024
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-PREDICTABLE\-L" "1" "02/14/2024" "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 Predictable 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>] [\-\-verbose | \-v]
.fi
.SH "DESCRIPTION"
.sp
Retrieves the NVMe Predictable 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 Predictable latency per NVM set log structure may be returned in one of several 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 Predictable 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 Predictable latency per NVM set log buffer to stdout\&.
.RE
.PP
\-o <fmt>, \-\-output\-format=<fmt>
.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
.PP
\-v, \-\-verbose
.RS 4
Increase the information detail in the output\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Print the Predictable 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 Predictable 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