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nvme-wdc-set-latency-monitor-feature(1)
=======================================
NAME
----
nvme-wdc-set-latency-monitor-feature - Set NVMe WDC latency monitor feature options
SYNOPSIS
--------
[verse]
'nvme wdc set-latency-monitor-feature' <device>
[--active_bucket_timer_threshold=<NUM> | -t <NUM>]
[--active_threshold_a=<NUM> | -a <NUM>]
[--active_threshold_b=<NUM> | -b <NUM>]
[--active_threshold_c=<NUM> | -c <NUM>]
[--active_threshold_d=<NUM> | -d <NUM>]
[--active_latency_config=<NUM> | -f <NUM>]
[--active_latency_minimum_window=<NUM> | -w <NUM>]
[--debug_log_trigger_enable=<NUM> | -r <NUM>]
[--discard_debug_log=<NUM> | -l <NUM>]
[--latency_monitor_feature_enable=<NUM> | -e <NUM>]
DESCRIPTION
-----------
For the NVMe device given, this command set the
latency monitor feature options (if supported by the device).
The <device> parameter is mandatory NVMe character device (ex: /dev/nvme0).
Setting results can be checked with 'get-latency-monitor-log' command.
On success it returns 0, error code otherwise.
OPTIONS
-------
-t <NUM>::
--active_bucket_timer_threshold=<NUM>::
The value that loads the Active Bucket Timer Threshold; default value is 07E0h.
-a <NUM>::
--active_threshold_a=<NUM>::
The value that loads into the Active Threshold A; default value is 05h.
-b <NUM>::
--active_threshold_b=<NUM>::
The value that loads into the Active Threshold B; default value is 13h.
-c <NUM>::
--active_threshold_c=<NUM>::
The value that loads into the Active Threshold C; default value is 1Eh.
-d <NUM>::
--active_threshold_d=<NUM>::
The value that loads into the Active Threshold D; default value is 2Eh.
-f <NUM>::
--active_latency_config=<NUM>::
The value that loads into the Active Latency Configuration. This
configures how both the Active Latency Stamp, and the Active Measured
Latency Fields are updated on a per I/O command (Read, Write, Deallocate)
counter basis; default value is 0FFFh.
-w <NUM>::
--active_latency_minimum_window=<NUM>::
The value that loads into the Active Latency Minimum Window; default value is 0Ah.
-r <NUM>::
--debug_log_trigger_enable=<NUM>::
The value that loads into the Debug Log Trigger Enable; When set to 1b
the first time the bucket/counter combination is incremented a debug log
is triggered. When cleared to 0b a debug log will not be triggered when
the bucket/counter combination is incremented.
-l <NUM>::
--discard_debug_log=<NUM>::
Discard Debug Log. When cleared to 00h the debug log, if it exists, will
not be cleared. When set to 01h the debug log will be discarded so
another log can be triggered. All the fields in the Set Features Data
structure are valid. When set to 02h the debug log will be discarded so
another log can be triggered. None of the other fields of the Set
Features Data structure are valid.
-e <NUM>::
--latency_monitor_feature_enable=<NUM>::
Latency Monitor Feature Enable; When set to 01h the Latency Monitor
Feature is enabled. When cleared to 00h the Latency Monitor Feature is
disabled.
EXAMPLES
--------
* Set NVMe WDC latency monitor feature options enabled with default value values:
+
------------
# nvme wdc set-latency-monitor-feature /dev/nvme0 -e 1
------------
* Set NVMe WDC latency monitor feature options disabled with default value values:
+
------------
# nvme wdc set-latency-monitor-feature /dev/nvme0 -e 0
------------
* Set NVMe WDC latency monitor feature options enabled with specific values:
+
------------
# nvme wdc set-latency-monitor-feature /dev/nvme0 --active_bucket_timer_threshold=1 \
--active_threshold_a=0x0 \
--active_threshold_b=0x1 \
--active_threshold_c=0x2 \
--active_threshold_d=0x3 \
--active_latency_config=0xfff \
--active_latency_minimum_window=0 \
--debug_log_trigger_enable=0 \
--discard_debug_log=0 \
--latency_monitor_feature_enable=0x1
------------
NVME
----
Part of the nvme-user suite.
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