If you have a laptop/ notebook with windows 7 Operating system, you can use the efficiency calculator to generate loads of useful information about its power consumption. Used in the right way, this can help you make huge gains in terms of battery life and performance.
• Go to command prompt as an administrator by typing cmd in Start Search,
• At the command line, type powercfg -energy and hit Enter,
The system will scan and looking for ways to improve power efficiency. wait for a moment, It will then publish the results in an HTML file.
Here is an example result from my laptop :
Power Efficiency Diagnostics Report
| Computer Name | SIM-PC |
| Scan Time | 2011-06-05T13:56:21Z |
| Scan Duration | 60 seconds |
| System Manufacturer | TOSHIBA |
| System Product Name | PORTEGE R500 |
| BIOS Date | 03/04/2008 |
| BIOS Version | Version 1.60 |
| OS Build | 7600 |
| Platform Role | PlatformRoleMobile |
| Plugged In | false |
| Process Count | 37 |
| Thread Count | 464 |
| Report GUID | {d0d4752c-7196-4977-9809-dd1903a80108} |
Analysis Results
Errors
Power Policy:Power Plan Personality is High Performance (On Battery)
The current power plan personality is High Performance when the system is on battery power.
Power Policy:Sleep timeout is disabled (On Battery)
The computer is not configured to automatically sleep after a period of inactivity.
Power Policy:802.11 Radio Power Policy is Maximum Performance (On Battery)
The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes.
Power Policy:PCI Express ASPM is disabled (On Battery)
The current power policy for PCI Express Active State Power Management (ASPM) is configured to Off.
Power Policy:Power Plan Personality is High Performance (Plugged In)
The current power plan personality is High Performance when the system is plugged in.
Power Policy:Sleep timeout is disabled (Plugged In)
The computer is not configured to automatically sleep after a period of inactivity.
Power Policy:Minimum processor performance state is 100% (Plugged In)
The processor is not configured to automatically reduce power consumption based on activity.
Power Policy:PCI Express ASPM is disabled (Plugged In)
The current power policy for PCI Express Active State Power Management (ASPM) is configured to Off.
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
| Device Name | Fingerprint Sensor |
| Host Controller ID | PCI\VEN_8086&DEV_27C9 |
| Host Controller Location | PCI bus 0, device 29, function 1 |
| Device ID | USB\VID_08FF&PID_1600 |
| Port Path | 1 |
USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
| Device Name | USB Root Hub |
| Host Controller ID | PCI\VEN_8086&DEV_27C9 |
| Host Controller Location | PCI bus 0, device 29, function 1 |
| Device ID | USB\VID_8086&PID_27C9 |
| Port Path |
CPU Utilization:Processor utilization is high
The average processor utilization during the trace was high. The system will consume less power when the average processor utilization is very low. Review processor utilization for individual processes to determine which applications and services contribute the most to total processor utilization.
| Average Utilization (%) | 9.34 |
Warnings
Platform Timer Resolution:Platform Timer Resolution
The default platform timer resolution is 15.6ms (15625000ns) and should be used whenever the system is idle. If the timer resolution is increased, processor power management technologies may not be effective. The timer resolution may be increased due to multimedia playback or graphical animations.
| Current Timer Resolution (100ns units) | 10000 |
| Maximum Timer Period (100ns units) | 156001 |
Platform Timer Resolution:Outstanding Timer Request
A program or service has requested a timer resolution smaller than the platform maximum timer resolution.
| Requested Period | 10000 |
| Requesting Process ID | 2060 |
| Requesting Process Path | \Device\HarddiskVolume2\Program Files\Mozilla Firefox\plugin-container.exe |
Power Policy:Display timeout is long (On Battery)
The display is configured to turn off after longer than 15 minutes.
| Timeout (seconds) | 600 |
Power Policy:Display timeout is long (Plugged In)
The display is configured to turn off after longer than 10 minutes.
| Timeout (seconds) | 900 |
Power Policy:802.11 Radio Power Policy is Maximum Performance (Plugged In)
The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes.
CPU Utilization:Individual process with significant processor utilization.
This process is responsible for a significant portion of the total processor utilization recorded during the trace.
| Process Name | firefox.exe |
| PID | 2140 |
| Average Utilization (%) | 5.76 |
| Module | Average Module Utilization (%) |
| \Device\HarddiskVolume2\Program Files\Mozilla Firefox\xul.dll | 2.83 |
| \Device\HarddiskVolume2\Program Files\Mozilla Firefox\mozjs.dll | 1.62 |
| \SystemRoot\system32\ntkrnlpa.exe | 0.29 |
CPU Utilization:Individual process with significant processor utilization.
This process is responsible for a significant portion of the total processor utilization recorded during the trace.
| Process Name | plugin-container.exe |
| PID | 2060 |
| Average Utilization (%) | 0.95 |
| Module | Average Module Utilization (%) |
| \SystemRoot\system32\ntkrnlpa.exe | 0.28 |
| \Device\HarddiskVolume2\Windows\System32\Macromed\Flash\NPSWF32.dll | 0.21 |
| \Device\HarddiskVolume2\Program Files\Mozilla Firefox\xul.dll | 0.11 |
CPU Utilization:Individual process with significant processor utilization.
This process is responsible for a significant portion of the total processor utilization recorded during the trace.
| Process Name | System |
| PID | 4 |
| Average Utilization (%) | 0.22 |
| Module | Average Module Utilization (%) |
| \SystemRoot\system32\ntkrnlpa.exe | 0.12 |
| \SystemRoot\System32\Drivers\cng.sys | 0.03 |
| \SystemRoot\system32\halmacpi.dll | 0.02 |
Information
Platform Timer Resolution:Timer Request Stack
The stack of modules responsible for the lowest platform timer setting in this process.
| Requested Period | 10000 |
| Requesting Process ID | 2060 |
| Requesting Process Path | \Device\HarddiskVolume2\Program Files\Mozilla Firefox\plugin-container.exe |
| Calling Module Stack | \Device\HarddiskVolume2\Windows\System32\ntdll.dll |
| \Device\HarddiskVolume2\Windows\System32\winmm.dll | |
| \Device\HarddiskVolume2\Program Files\Mozilla Firefox\xul.dll | |
| \Device\HarddiskVolume2\Windows\System32\user32.dll | |
| \Device\HarddiskVolume2\Program Files\Mozilla Firefox\xul.dll | |
| \Device\HarddiskVolume2\Program Files\Mozilla Firefox\plugin-container.exe | |
| \Device\HarddiskVolume2\Windows\System32\kernel32.dll | |
| \Device\HarddiskVolume2\Windows\System32\ntdll.dll |
Power Policy:Active Power Plan
The current power plan in use
| Plan Name | OEM High Performance |
| Plan GUID | {8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c} |
Power Policy:Power Plan Personality (On Battery)
The personality of the current power plan when the system is on battery power.
| Personality | High Performance |
Power Policy:Power Plan Personality (Plugged In)
The personality of the current power plan when the system is plugged in.
| Personality | High Performance |
System Availability Requests:Analysis Success
Analysis was successful. No energy efficiency problems were found. No information was returned.
Battery:Battery Information
| Battery ID | 0000001901G71C00086110 |
| Manufacturer | |
| Serial Number | 0000001901 |
| Chemistry | Li-I |
| Long Term | 1 |
| Design Capacity | 62640 |
| Last Full Charge | 51451 |
Platform Power Management Capabilities:Supported Sleep States
Sleep states allow the computer to enter low-power modes after a period of inactivity. The S3 sleep state is the default sleep state for Windows platforms. The S3 sleep state consumes only enough power to preserve memory contents and allow the computer to resume working quickly. Very few platforms support the S1 or S2 Sleep states.
| S1 Sleep Supported | false |
| S2 Sleep Supported | false |
| S3 Sleep Supported | true |
| S4 Sleep Supported | true |
Platform Power Management Capabilities:Adaptive Display Brightness is supported.
This computer enables Windows to automatically control the brightness of the integrated display.
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
| Group | 0 |
| Index | 0 |
| Idle (C) State Count | 3 |
| Performance (P) State Count | 2 |
| Throttle (T) State Count | 0 |
Platform Power Management Capabilities:Processor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
| Group | 0 |
| Index | 1 |
| Idle (C) State Count | 3 |
| Performance (P) State Count | 2 |
| Throttle (T) State Count | 0 |
