nvme-solidigm-latency-tracking-log - Enable/Retrieve Latency tracking Log

NAME  SYNOPSIS  DESCRIPTION  OPTIONS  EXAMPLES  NVME 

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NAME

nvme-solidigm-latency-tracking-log − Enable/Retrieve Latency tracking Log

SYNOPSIS

nvme solidigm latency−tracking−log <device> [−−enable | −e] [−−disable | −d]
[−−read | −r] [−−write | −w]
[−−type <value> | −t <value>]
[−−output−format=<fmt> | −o <fmt>]

DESCRIPTION

Enables, disables, or retrieves the Solidigm latency tracking log for the given NVMe device. This log provides detailed information about I/O latencies.

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

OPTIONS

−e, −−enable

Enable latency tracking before retrieving the log.

−d, −−disable

Disable latency tracking after retrieving the log.

−r, −−read

Retrieve read latency statistics (default if neither −−read nor −−write is specified).

−w, −−write

Retrieve write latency statistics.

−t <value>, −−type <value>

Specify the log type to retrieve. Valid values depend on the device’s capabilities.

−o <fmt>, −−output−format=<fmt>

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

EXAMPLES

• Enable latency tracking and retrieve the read latency log:

# nvme solidigm latency−tracking−log /dev/nvme0 −−enable −−read

• Retrieve the write latency log in JSON format:

# nvme solidigm latency−tracking−log /dev/nvme0 −−write −o json

• Disable latency tracking after retrieving the log:

# nvme solidigm latency−tracking−log /dev/nvme0 −−disable

• Specify a log type when retrieving latency statistics:

# nvme solidigm latency−tracking−log /dev/nvme0 −−type 1 −−read

NVME

Part of the nvme−user suite

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