nvme-predictable-lat-log - Man Page

nvme predictable-lat-log <device> [--nvmset-id=<nvmset_id> | -i <nvmset_id>]
                        [--raw-binary | -b]
                        [--output-format=<fmt> | -o <fmt>] [--verbose | -v]

Retrieves the NVMe Predictable latency per NVM set log page from an NVMe device and provides the returned structure​.

The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1)​.

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​.

-i <nvmset_id>, --nvmset-id=<nvmset_id>

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’s 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​.

-b,  --raw-binary

Print the raw Predictable latency per NVM set log buffer to stdout​.

-o <fmt>, --output-format=<fmt>

Set the reporting format to normal, json or binary​. Only one output format can be used at a time​.

-v,  --verbose

Increase the information detail in the output​.

• Print the Predictable latency per NVM set log page in a human readable format:

  # nvme predictable-lat-log /dev/nvme0

• Print the raw Predictable latency per NVM set log to a file:

  # nvme predictable-lat-log /dev/nvme0 --raw-binary > nvmset_log​.raw

  It is probably a bad idea to not redirect stdout when using this mode​.

Part of the nvme-user suite

nvme(1).