Hi, Wednesday (3 November 2010)
High North has reviewed the PWG Imaging System Power Management specs
and has the following comments:
Power Model (wd-wimspower10-20100926.pdf)
(1) Editorial - replace "transitional" with "interrupt" (for states)
- section 2.4.2, line 408 (first instance - global change)
Rationale: Original term is obscure and inaccurate
- all power states may be "transitional" during ResetXxx operations
- all non-Stable states are defined as software/hardware interrupts
in sections 2.4.2 and 2.4.3
(2) Technical - delete all 10 PowerGeneral.MaxXxxRecords elements
- section 5.1.1 through 5.1.10, lines 825-892
Rationale: Table limit elements are unlikely to be queried/used
- typical Client will simply attempt to create a row
(3) Technical - reduce PowerMeter from RECOMMENDED to OPTIONAL
- section 5.5, lines 1043-1050
Rationale: All elements exposing power usage should be OPTIONAL
- legal issues have already been caused by vendor power usage claims
(4) Technical - reduce PowerSupport from RECOMMENDED to OPTIONAL
- section 6.1, lines 1189-1193
Rationale: All elements exposing power usage should be OPTIONAL
- legal issues have already been caused by vendor power usage claims
Rationale: PowerSupport group was originally designed to be simple
list of supported power states
- addition of power/job/network usage elements forced only Stable
states to be listed (breaking original design)
- PowerGeneral.CanRequestPowerStates was added to correct the design
flaw, so original purpose of PowerSupport group is now redundant
(5) Technical - reduce PowerTransition from RECOMMENDED to OPTIONAL
- section 6.2, lines 1270-1275
Rationale: All elements exposing power usage should be OPTIONAL
- legal issues have already been caused by vendor power usage claims
and transition times are implicit vendor power usage claims
- PowerTransition shouldn't be higher conformance than PowerSupport
Power MIB (wd-wimspowermib10-20100926.pdf/mib)
(1) Editorial - replace "transitional" with "interrupt" (for states)
- section 2.4, line 228 (first instance - global change)
Rationale: See Power Model comment (1) above
(2) Technical - delete all 10 powGeneral.MaxXxxRecords objects
- section 5 (spec), lines 261-363 and 389-413 (MIB)
Rationale: See Power Model comment (2) above
(3) Technical - reduce powMeterGroup from RECOMMENDED to OPTIONAL
- section 5 (spec), lines 1740-1744 (MIB)
Rationale: See Power Model comment (3) above
(4) Technical - reduce powSupportGroup from RECOMMENDED to OPTIONAL
- section 5 (spec), lines 1692-1697 (MIB)
Rationale: See Power Model comment (4) above
(5) Technical - reduce powTransitionGroup from RECOMMENDED to OPTIONAL
- section 5 (spec), lines 1699-1704 (MIB)
Rationale: See Power Model comment (5) above
Cheers,
- Ira (Editor of Power Model and Power MIB)
Ira McDonald (Musician / Software Architect)
Chair - Linux Foundation Open Printing WG
Co-Chair - IEEE-ISTO PWG IPP WG
Co-Chair - TCG Hardcopy WG
IETF Designated Expert - IPP & Printer MIB
Blue Roof Music/High North Inc
http://sites.google.com/site/blueroofmusichttp://sites.google.com/site/highnorthinc
mailto:blueroofmusic at gmail.com
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