116 lines
3.4 KiB
Groff
116 lines
3.4 KiB
Groff
.TH "libnvme" 9 "struct nvme_id_psd" "March 2025" "API Manual" LINUX
|
|
.SH NAME
|
|
struct nvme_id_psd \- Power Management data structure
|
|
.SH SYNOPSIS
|
|
struct nvme_id_psd {
|
|
.br
|
|
.BI " __le16 mp;"
|
|
.br
|
|
.BI " __u8 rsvd2;"
|
|
.br
|
|
.BI " __u8 flags;"
|
|
.br
|
|
.BI " __le32 enlat;"
|
|
.br
|
|
.BI " __le32 exlat;"
|
|
.br
|
|
.BI " __u8 rrt;"
|
|
.br
|
|
.BI " __u8 rrl;"
|
|
.br
|
|
.BI " __u8 rwt;"
|
|
.br
|
|
.BI " __u8 rwl;"
|
|
.br
|
|
.BI " __le16 idlp;"
|
|
.br
|
|
.BI " __u8 ips;"
|
|
.br
|
|
.BI " __u8 rsvd19;"
|
|
.br
|
|
.BI " __le16 actp;"
|
|
.br
|
|
.BI " __u8 apws;"
|
|
.br
|
|
.BI " __u8 epfrt;"
|
|
.br
|
|
.BI " __u8 fqvt;"
|
|
.br
|
|
.BI " __u8 epfvt;"
|
|
.br
|
|
.BI " __u8 epfr_fqv_ts;"
|
|
.br
|
|
.BI " __u8 epfvts;"
|
|
.br
|
|
.BI " __u8 rsvd28[4];"
|
|
.br
|
|
.BI "
|
|
};
|
|
.br
|
|
|
|
.SH Members
|
|
.IP "mp" 12
|
|
Maximum Power indicates the sustained maximum power consumed by the
|
|
NVM subsystem in this power state. The power in Watts is equal to
|
|
the value in this field multiplied by the scale specified in the Max
|
|
Power Scale bit (see \fIenum nvme_psd_flags\fP). A value of 0 indicates
|
|
Maximum Power is not reported.
|
|
.IP "rsvd2" 12
|
|
Reserved
|
|
.IP "flags" 12
|
|
Additional decoding flags, see \fIenum nvme_psd_flags\fP.
|
|
.IP "enlat" 12
|
|
Entry Latency indicates the maximum latency in microseconds
|
|
associated with entering this power state. A value of 0 indicates
|
|
Entry Latency is not reported.
|
|
.IP "exlat" 12
|
|
Exit Latency indicates the maximum latency in microseconds
|
|
associated with exiting this power state. A value of 0 indicates
|
|
Exit Latency is not reported.
|
|
.IP "rrt" 12
|
|
Relative Read Throughput indicates the read throughput rank
|
|
associated with this power state relative to others. The value in
|
|
this is less than the number of supported power states.
|
|
.IP "rrl" 12
|
|
Relative Read Latency indicates the read latency rank associated
|
|
with this power state relative to others. The value in this field is
|
|
less than the number of supported power states.
|
|
.IP "rwt" 12
|
|
Relative Write Throughput indicates write throughput rank associated
|
|
with this power state relative to others. The value in this field is
|
|
less than the number of supported power states
|
|
.IP "rwl" 12
|
|
Relative Write Latency indicates the write latency rank associated
|
|
with this power state relative to others. The value in this field is
|
|
less than the number of supported power states
|
|
.IP "idlp" 12
|
|
Idle Power indicates the typical power consumed by the NVM
|
|
subsystem over 30 seconds in this power state when idle.
|
|
.IP "ips" 12
|
|
Idle Power Scale indicates the scale for \fIstruct nvme_id_psd\fP.idlp,
|
|
see \fIenum nvme_psd_ps\fP for decoding this field.
|
|
.IP "rsvd19" 12
|
|
Reserved
|
|
.IP "actp" 12
|
|
Active Power indicates the largest average power consumed by the
|
|
NVM subsystem over a 10 second period in this power state with
|
|
the workload indicated in the Active Power Workload field.
|
|
.IP "apws" 12
|
|
Bits 7-6: Active Power Scale(APS) indicates the scale for the \fIstruct
|
|
nvme_id_psd\fP.actp, see \fIenum nvme_psd_ps\fP for decoding this value.
|
|
Bits 2-0: Active Power Workload(APW) indicates the workload
|
|
used to calculate maximum power for this power state.
|
|
See \fIenum nvme_psd_workload\fP for decoding this field.
|
|
.IP "epfrt" 12
|
|
Emergency power fail recovery time
|
|
.IP "fqvt" 12
|
|
Forced quiescence vault time
|
|
.IP "epfvt" 12
|
|
Emergency power fail vault time
|
|
.IP "epfr_fqv_ts" 12
|
|
Bits 7-4: Forced quiescence vault time scale
|
|
Bits 3-0: Emergency power fail recovery time scale
|
|
.IP "epfvts" 12
|
|
Bits 3-0: Emergency power fail vault time scale
|
|
.IP "rsvd28" 12
|
|
Reserved
|