nvme_id_psd - Man Page
Power Management data structure
Synopsis
struct nvme_id_psd {
__le16 mp;
__u8 rsvd2;
__u8 flags;
__le32 enlat;
__le32 exlat;
__u8 rrt;
__u8 rrl;
__u8 rwt;
__u8 rwl;
__le16 idlp;
__u8 ips;
__u8 rsvd19;
__le16 actp;
__u8 apws;
__u8 rsvd23[9];
};
Members
- mp
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 enum nvme_psd_flags). A value of 0 indicates Maximum Power is not reported.
- rsvd2
Reserved
- flags
Additional decoding flags, see enum nvme_psd_flags.
- enlat
Entry Latency indicates the maximum latency in microseconds associated with entering this power state. A value of 0 indicates Entry Latency is not reported.
- exlat
Exit Latency indicates the maximum latency in microseconds associated with exiting this power state. A value of 0 indicates Exit Latency is not reported.
- rrt
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.
- rrl
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.
- rwt
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
- rwl
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
- idlp
Idle Power indicates the typical power consumed by the NVM subsystem over 30 seconds in this power state when idle.
- ips
Idle Power Scale indicates the scale for struct nvme_id_psd.idlp, see enum nvme_psd_ps for decoding this field.
- rsvd19
Reserved
- actp
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.
- apws
Bits 7-6: Active Power Scale(APS) indicates the scale for the struct nvme_id_psd.actp, see enum nvme_psd_ps for decoding this value. Bits 2-0: Active Power Workload(APW) indicates the workload used to calculate maximum power for this power state. See enum nvme_psd_workload for decoding this field.
- rsvd23
Reserved