diff options
| author | Alexey Sukhoguzov <sap@eseipi.net> | 2024-10-30 12:03:30 +0100 |
|---|---|---|
| committer | Warner Losh <imp@FreeBSD.org> | 2026-01-09 13:32:49 -0700 |
| commit | a24932dcec45ca68fa5ca2f49bbf0df539cfd710 (patch) | |
| tree | 83a9dbe9355a1731bf67e7fd1cf4b55df3e19095 /share | |
| parent | 4c18ec0e75e1f2ca99e587d749a9191513e63a29 (diff) | |
nvme: Support Autonomous Power State Transition (APST)
APST is an optional NVMe power-saving feature that allows devices
to autonomously enter higher non-operational power states after a
certain amount of idle time, reducing the controller's overall power
consumption.
Signed-off-by: Alexey Sukhoguzov <sap@eseipi.net>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1444
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/nvme.4 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/share/man/man4/nvme.4 b/share/man/man4/nvme.4 index dcd2ec86f5fa..d24ffc07ef9e 100644 --- a/share/man/man4/nvme.4 +++ b/share/man/man4/nvme.4 @@ -128,6 +128,15 @@ hw.nvme.hmb_max .Pp The default value is 5% of physical memory size per device. .Pp +To enable Autonomous Power State Transition (APST), set the following +tunable value in +.Xr loader.conf 5 : +.Bd -literal -offset indent +hw.nvme.apst_enable=1 +.Ed +.Pp +The default vendor-provided settings, if any, will be applied. +.Pp The .Xr nvd 4 driver is used to provide a disk driver to the system by default. |