AOAC-ModernStandby

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Part selection
Recommended low power support USB 2.0- LPM support for L2/U2 PCIe (WLAN and storage) – support for L1.substate For SATA SSD devices use of Slumber and Device Sleep
D3 device power state support NIC selection
Connected MS requires at least one network devices to be NDIS 6.3 compliant, or the system is placed in disconnected MS
3. Simplified wake story A system stays in the S0 state and waking simply requires a hardware interrupt. Thus, it may
eliminate any need for firmware interaction (Device wake, even in the S3 model, requires functionality
Storage selection If the storage device/solution reports a seek penalty/rotational delay, indicating rotating media, then disconnected will be the default standby mode. If the storage device/solution indicates that it has no rotational delay or seek penalty (for example, is an SSD), then connected will be the default standby mode. Do not recommend enabling connectivity on rotational-only (HDD) systems.
integrated into the BIOS, This makes wake times slower and more cumbersome to develop. )
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Comparison Summary
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Benefits
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Modern standby user experiences
Battery selection Battery life targets vary by form factor and price (get the table)
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Storage Optimization
New adaptive idle timeout algorithm be introduced in windows 10: Host attempt to average no more than one power state transition per 5-minute interval by default
A miniport driver can opt-in to this behavior: Register a STOR_POFX_DEVICE_V3 with StorPortInitializePoFxPower in the ScsiUnitPoFxPowerInfo unit control callback. Set the STOR_POFX_DEVICE_FLAG_ADAPTIVE_D3_IDLE_TIMEOUT flag in the Flags member of the STOR_POFX_DEVICE_V3 structure. Set the MinimumPowerCyclePeriodInMS member in the STOR_POFX_DEVICE_V3 structure to the value that indicates, in the worst case, how often the device can be power cycled. Units are in milliseconds. We recommend this be at least 5 minutes (i.e. the device should not be power cycled more than once every 5 minutes).
CS and MS Wake patterns while in DRIPS: CS: wake up at least once every 30 seconds from DRIPS to process work MS: postponing non-critical work and removing unnecessary wakeups, particularly on battery power. Some timers are postponed until system is wake or plugged into AC.
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Advantages of using MS
1. Instant on Resume time from the low power idle model is at least twice as fast as from S3 resume
2. Background activity while the system is “Off” ✓System is still in S0 (a fully running state, ready and able to do work) ✓Desktop apps are stopped by the DAM (Desktop Activity Moderator) ✓Background tasks from Windows Store apps are permitted to do work ✓On a connected modern standby, network is still active and users can receive events ✓On a disconnected modern standby, VoIP calls wouldn’t be available, real-time events can still happen
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Introduction
Windows8 Connected Standby (CS) : ✓ Enables the smartphone power model on the PC ✓ Provides an instant on/instant off(立即开关机) UE as their phones ✓ S0 low power idle model enables the system to stay up-to-date whenever a suitable network is available ✓ Expect instantly available power model instead of the traditional S3/S4 power model
Windows 10 Modern Standby (MS) ✓ Expands the Windows 8.1 CS power model to be more inclusive and allows system based on rotational media and hybrid media (SSD + HDD or SSHD) ✓ Expands a NIC that doesn’t support all of the prior requirements for CS to still take advantage of the low power idle. MS have the flexibility to configure the default behavior to limit network activity ✓ Only wakes from the lowest power state when absolutely necessary, real time action required (OS maintenance or a user wakes the system) ✓ The low power idle state is accomplished through tight integration between the firmware, chipset, low power components, devices and drivers. ✓ DRIPS – Deepest Runtime Idle Platform State, corresponds to the lowest power state for the SOC during CS or MS
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Power/Performance Targets
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System Power State
Link: (v=vs.85).aspx If system support MS, but networking or storage can’t meet MS requirements, system will automatically be placed in a disconnected state
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Behavior differences
Connected and disconnected MS: Whether maintaining network connection